Showing papers on "Chemical resistance published in 2014"
TL;DR: The effect of zircon content on the mechanical and chemical behaviors of injection molded silica-based ceramic cores has been investigated in this article, where three point bending tests were carried out on all the prepared samples and the chemical resistance of the prepared cores was evaluated by leaching of samples in 43% KOH solution at its boiling point.
66 citations
TL;DR: In this paper, a BBL graft copolymer was successfully synthesized, which exhibited good chemical resistance, thermal and mechanical properties compared with pure poly(BA-co-MMA).
64 citations
TL;DR: In this article, Napier grass fiber strands were used as reinforcement to obtain composites with epoxy resin as matrix, and the composites were prepared by means of hand lay-up molding, then the effects of Napier Grass fiber strand loading on mechanical properties such as tensile, flexural and impact, interfacial bonding, and chemical resistance were investigated.
31 citations
TL;DR: In this article, four different coating formulations were developed on the basis of silane content (5, 10, 15 and 20 %) in the coating and cured with hexabutoxymethylmelamine at 120 °C for 1 h.
Abstract: Thermally cured cashew nut shell liquid based hybrid coatings have been successfully developed using three step processes of malenization, silane modification and subsequent hydrolysis and condensation with tetra ethyl orthosilicate for corrosion protection of mild steel. The synthesized precursor was then characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy (1H-NMR, 13C-NMR and 29Si-NMR) for structural elucidation. Four different coating formulations were developed on the basis of silane content (5, 10, 15 and 20 %) in the coating and cured with hexabutoxymethylmelamine at 120 °C for 1 h. The completely cured coatings were evaluated for mechanical properties, solvent resistance, chemical resistance, hydrolytic stability and accelerated weathering properties. Scanning electron microscope/energy dispersive spectroscopy was used to analyse the morphological behaviour and elemental distribution of the coating. Results revealed that 20 % silane modification showed better overall properties as compared to other formulations due to formation of more metal–oxygen–silicon covalent bond at metal-coating interface.
23 citations
TL;DR: In this article, a combination of photoinitiator and crosslinker is studied in depth, followed by a characterization of the formed macromolecular structure, and the performance of the resulting membranes is then evaluated through longterm immersion in solvents.
Abstract: Polysulfone-based membranes with excellent chemical resistance and a wet thickness up to 200 μm are obtained via UV curing of unmodifi ed polymers after careful tuning of the photoinitiating system and the crosslinker structure. Combinations of photoinitiator and crosslinker are studied in depth, followed by a characterization of the formed macromolecular structure. The performance of the resulting membranes is then evaluated through long-term immersion in solvents. Classical depth-curing acyl phosphine oxide-based photoinitiators in combination with a pentaacrylate crosslinker are found to be the optimal system.
21 citations
Patent•
23 Apr 2014
TL;DR: The anti-fingerprint coating has excellent corrosion resistance, alkali resistance, water resistance, chemical resistance, striatonigral degeneration resistance, and machinability as discussed by the authors.
Abstract: The invention relates to an aqueous colorful chromium-free anti-fingerprint coating for coating the surface of a metal material and a construction method thereof. A coated film formed by coating the coating on the surface of the metal material and drying is composed of following components in percentage by weight: 30%-90% of aqueous polymer resin (A), 1%-30% of a resin cross-linking agent (B), 1%-30% of an organic silicon compound (C), 0.5%-10% of an organic wax compound (D), 1%-30% of a coloring compound (E), 0.05%-3% of a metal salt type compound (F), a compound (G) which is selected from at least one one of titanium, zirconium and silicon and accounts for 0.1%-5% of the weight percent of the coated film by using the element to calculate, a sol dispersion body (H) of a monomer or a compound which is selected from at least one of Si, Zr, Ti, Al, Sn, Hf, Ce and Nb and accounts for 0.01%-10% of the weight percent of the coated film. The anti-fingerprint coating has excellent corrosion resistance, alkali resistance, water resistance, chemical resistance, striatonigral degeneration resistance and machinability.
19 citations
TL;DR: In this paper, the authors developed extruded porcelain stoneware tiles that show antimicrobial (to act as a barrier to the bacteria's growth during a long period of time), and anti-stain (easy to clean) actions, and possess high chemical resistance.
19 citations
01 Jan 2014
TL;DR: An overview of surface modification and coating techniques for plastics is presented in this paper for changing the surface properties to meet the performance requirements in a variety of applications, including adhesion, wettability, biocompatibility, scratch and abrasion resistance, chemical resistance, barrier properties, and more.
Abstract: An overview of surface modification and coating techniques for plastics is presented for changing the surface properties to meet the performance requirements in a variety of applications. Surface modification and coatings are utilized for purposes of adhesion, wettability, biocompatibility, scratch and abrasion resistance, chemical resistance, barrier properties, and more. Methods for modification include physical processes, such as surface roughening and abrading; liquid chemical processes, such as acid etching; and reactive gas chemical processes. The reactive gas chemical processes covered include corona, flame, and low-temperature plasma. Surface degradation from reactive gas exposure is presented with respect to the sources, chemical mechanisms, and methods for characterization. Coatings for plastics, including paints, functional coatings, and metallization, are summarized.
18 citations
TL;DR: In this article, sol-gel derived coatings composed of TiO2-SiO2 were applied on enamelled stainless steel to study the influence of the thickness on the morphological parameters, achieve continuous enamel surfacing and improve the corrosion-resistance and mechanical strength of silicate enamel for stainless steel.
Abstract: Sol–gel derived coatings composed of TiO2–SiO2 were deposited on enamelled stainless steel. In order to study the influence of the thickness on the morphological parameters, achieve continuous enamel surfacing and improve the corrosion-resistance and mechanical strength of silicate enamel for stainless steel were used. Sol–gel coatings with different compositions, heat treatment and numbers of layers were prepared in this work. The structure and morphology of the films were demonstrated by the means of X-ray diffraction analysis (XRD), scanning electron (SEM) and atomic force (AFM) microscopies. Thin triple layer crack-free films with a thickness of 470 nm were obtained. The mechanical strength (HV) of the three-layer coating was 10.4 GPa and was achieved at a temperature of 700 °C. Thin SiO2–TiO2 sol–gel coatings were applied in order to enhance the chemical durability of these coatings in both acidic and basic solutions in accordance with ISO 28706 standards. Corrosion tests with the uncoated and sol–gel coated enamel were performed in 3 wt.% boiling oxalic acid at 95–98 °C and in 1 N NaOH solution at 80 °C. Crack-free 470 nm 3-layer silica–titania coatings significantly improved chemical resistance against the basic medium (up to 80%) and stability against the acid medium (up to 28%) for the S80 sample fired at 700 °C.
16 citations
TL;DR: In this article, UP/organo-clay nanocomposites were synthesized using unsaturated polyester as the matrix and organically modified montmorillonite (CA-MMT) as the reinforcing agent.
Abstract: Nanocomposites were synthesized using unsaturated polyester as the matrix and organically modified montmorillonite (CA-MMT) as the reinforcing agent. XRD pattern of the modified montmorillonite showed that the interlayer spacing expanded from 1.21 to 1.9 nm, indicating intercalation. TGA and DTA show loss of organic surfactant from interlayer galleries. Glass transition temperature (Tg) of these composites increased from 71 °C in the unfilled unsaturated polyester to 79 °C in the composites with 5 % organically modified montmorillonite. Chemical resistance and mechanical properties of the UP/organo-clay nanocomposites were studied. Chemical resistance was studied under aqueous conditions in acetic acid, nitric acid, hydrochloric acid, sodium hydroxide, aqueous ammonia and sodium carbonate. Chemical resistance studies reveal maximum weight gain/loss with increasing clay content. Mechanical studies show maximum characteristics for the composites-clay filled 5 % (w/w).
15 citations
Patent•
27 Aug 2014
TL;DR: In this article, a heat-resistant ABS resin for spraying and a preparation method thereof is described, which comprises the following compositions in parts by weight: 20-80 parts of ABS rubber powder, 10-79 parts of AS rein II and the chemical-resistant modifier, 5-25 parts of a heatresisting agent, 0.1-1 part of an anti-oxidant and 0.
Abstract: The invention discloses heat-resistant ABS resin for spraying and a preparation method thereof. The ABS resin comprises the following compositions in parts by weight: 20-80 parts of ABS rubber powder, 10-79 parts of AS resin I, 1-10 parts of AS resin II, 0.5-5 parts of a chemical-resistant modifier, 5-25 parts of a heat-resisting agent, 0.1-1 part of an anti-oxidant and 0.1-1 part of a lubricant. By employing the high-fluidity AS rein II and the chemical-resistant modifier, the heat-resistant ABS resin possess relatively high fluidity, also the chemical resistance of the material surface is greatly improved, the cracking phenomena are substantially reduced, and the paint-spraying yield rate.
Patent•
01 Dec 2014TL;DR: In this paper, a method for providing a metallic or concrete surface of a chemical installation with a coating, which comprises the steps of - providing a coating composition comprising epoxy-functional resin, and amine curing agent for the epoxy functional resin, wherein the coating composition comprises an organic silicon-containing compound selected from the group of organosilanes and organo-oxanes, with the molar ratio between the silicon atoms of the organic siliconcontaining compound and the polygonal epoxy groups being in the range of 0.20-0.75:1.
Abstract: The invention pertains to a method for providing a metallic or concrete surface of a chemical installation with a coating, which comprises the steps of - providing a coating composition comprising epoxy-functional resin, and amine curing agent for the epoxy-functional resin, wherein the coating composition comprises an organic silicon-containing compound selected from the group of organosilanes and organosiloxanes, with the molar ratio between the silicon atoms of the organic silicon-containing compound and the epoxy-groups in the coating composition being in the range of 0.20- 0.75:1.00, - applying the coating composition to a metallic or concrete surface of a chemical installation to form a coating layer, and - allowing the coating layer to cure at a temperature in the range of 0 to 50°C. The invention also pertains to a chemical installation comprising a metallic or concrete surface provided with a lining of a cured coating composition and to a coating composition suitable for providing a metallic or concrete surface of a chemical installation with a coating. It has been found that the coating composition of the present invention shows a wide application spectrum and a high chemical resistance.
Patent•
12 Feb 2014
TL;DR: The water-based fluorine-containing epoxy paint has excellent hydrophobicity, chemical resistance, acid-alkali resistance and stain resistance and strong substrate combining force; the preparation method is simple, the cost is low, and the industrial production can be realized as mentioned in this paper.
Abstract: The invention discloses water-based fluorine-containing epoxy paint. A preparation method of the water-based fluorine-containing epoxy paint comprises the following steps of (1) uniformly mixing absolute ethyl alcohol, amino siloxane and fluorine-containing siloxane under the condition of magnetic-force stirring, adjusting the pH value to 3-5, reacting for 45min to 65min at room temperature, thus obtaining the fluorine-containing and amino-containing siloxane sol, wherein the amino siloxane contains -NH2 or -NH-, and the fluorine-containing siloxane contains -CF2- or -CF3; (2) at room temperature, mixing the fluorine-containing and amino-containing siloxane sol with water-based epoxy resin emulsion, reacting for 0.5h to 1h under the condition of magnetic-force stirring, thus obtaining the modified water-based epoxy emulsion after the reaction; (3) at room temperature, adding polyamine curing agent into the modified epoxy emulsion and reacting for 10min to 20min under the condition of magnetic-force stirring, thus obtaining the water-based fluorine-containing epoxy paint. A coating prepared from the fluorine-containing epoxy paint has excellent hydrophobicity, chemical resistance, acid-alkali resistance and stain resistance and strong substrate combining force; the preparation method is simple, the cost is low, and the industrial production can be realized.
Patent•
19 Feb 2014
TL;DR: In this article, a photo-sensitive resin composition consisting of an alkali-soluble resin, a metal chelate compound, and a maleimide compound was proposed to give a cured film having high hardness and excellent transparency.
Abstract: PROBLEM TO BE SOLVED: To provide a photosensitive resin composition which is alkali-developable and has a plurality of performances such that the composition gives a cured film having high hardness and excellent transparency, wet heat resistance, resistance to artificial sweat, adhesiveness, chemical resistance and vacuum resistance, exhibits good storage stability in a coating liquid state, and prevents reduction in the adhesiveness and the chemical resistance during storage.SOLUTION: The photosensitive resin composition comprises (A) an alkali-soluble resin, (B) a metal chelate compound, and (C) a maleimide compound. The (B) metal chelate compound has a specific structure; and the (C) maleimide compound has a substituent having a specific structure.
Patent•
11 Jun 2014
TL;DR: In this paper, a polyester copolymer which comprises a residue of a dicarboxylic acid component comprising terephthalic acid and a diol component comprising dianhydrohexitol was proposed.
Abstract: The present invention relates to a polymer resin composition capable of providing an ecofriendly biomass-containing synthetic resin exhibiting improved chemical resistance. The present invention provides a polymer resin composition having excellent chemical resistance, comprising: a polyester copolymer which comprises a residue of a dicarboxylic acid component comprising terephthalic acid, and a residue of a diol component comprising dianhydrohexitol; and at least one copolymer selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft copolymer, wherein the tensile strength loss rate represented by the following general formula 1 is 0.5 to 30%: [general formula 1] tensile strength loss rate (%) = [(pre-test tensile strength - post-test tensile strength)/pre-test tensile strength] x 100
Patent•
14 Mar 2014TL;DR: In this article, a polymeric composition consisting of a photoactive additive containing photoactive groups derived from a monofunctional benzophenone was used to produce a crosslinked surface.
Abstract: Processes for increasing the chemical resistance of a surface of a formed article are disclosed. The formed article is produced from a polymeric composition comprising a photoactive additive containing photoactive groups derived from a monofunctional benzophenone. The surface of the formed article is then exposed to ultraviolet light to cause crosslinking of the photoactive additive and produce a crosslinked surface. The crosslinking enhances the chemical resistance of the surface. Various means for controlling the depth of the crosslinking are also discussed.
Patent•
29 Apr 2014TL;DR: In this paper, a surface modifier comprising an organosilicon-containing fluoropolymer compound having formula (1), a hydrolyzate thereof, or a partial hydrolytic condensate thereof was proposed.
Abstract: The invention provides a surface modifier comprising an organosilicon-containing fluoropolymer compound having formula (1), a hydrolyzate thereof, or a partial hydrolytic condensate thereof. When an article is treated the surface modifier, the surface modifier forms thereon a coating having water/oil repellency and quick water slip as well as UV resistance, heat resistance, and chemical resistance.
Patent•
02 Oct 2014
TL;DR: In this article, the purpose of the present paper is to provide an alkali developable photosensitive resin composition which has multiple performances, i.e., being capable of providing a cured film that has high hardness, high transparency, high resistance to moist heat, high adhesiveness and high chemical resistance, and, when stored in the form of a coating solution, showing high storage stability.
Abstract: The purpose of the present invention is to provide an alkali developable photosensitive resin composition which has multiple performances, i.e., being capable of providing a cured film that has high hardness, high transparency, high resistance to moist heat, high adhesiveness and high chemical resistance, and, when stored in the form of a coating solution, showing high storage stability and the adhesiveness and chemical resistance thereof not being deteriorated during storage. Provided is a photosensitive resin composition comprising: an alkali-soluble resin (A); a metal chelate compound (D); and a silane compound (E), wherein the alkali soluble resin (A) is an alkali soluble resin having a double bond equivalent within a specific range, the metal chelate compound (D) is a compound having a specific structure, and the silane compound (E) is a tetrafunctional silane or silane oligomer having a specific structure.
Patent•
27 May 2014
TL;DR: In this paper, a method for forming an inorganic coating film using the same inorganic paint composition and a method to construct a strong binding force to the surfaces of metal products or non-metal products regardless of the type of a parent material was presented.
Abstract: The present invention relates to an inorganic paint composition and a method for forming an inorganic coating film using the same. Provided is an inorganic paint composition comprising at least one among alkali metal silicate expressed by following chemical formula 1 to chemical formula 3; phosphoric acid (H3PO4); one or more strong bases selected from the group of KOH, NaOH, and LiOH; and water (H2O). (In the following chemical formula 1 to chemical formula 3, x and y is 0.01-500 respectively, n is 1-20 of natural number) [chemical formula 1] xNa2OySiO2nH2O [chemical formula 2] xK2OySiO2nH2O [chemical formula 3] xLi2OySiO2nH2O An inorganic coating film formed using the inorganic paint composition according to the present invention notably has a strong binding force to the surfaces of metal products or non-metal products regardless of the type of a parent material, and thus has superior adhesion or attachment force to the parent material, and organic contaminants or other contaminants can be easily removed even when using only water. The inorganic paint composition and the inorganic coating film formed using the same has superior qualities of weather resistance, durability, abrasion resistance, surface hardness, far infrared radiation, incombustibility, chemical resistance, corrosion resistance, and antimicrobial properties.
Patent•
10 Dec 2014
TL;DR: In this paper, a method to enhance the crosslinking density of the polymers in the fluorocarbon coating has been proposed, which can effectively enhance the density of polymers.
Abstract: The invention discloses a preparation method of a fluorocarbon coating. The fluorocarbon coating is composed of a component A and a component B. When in use, the component A and component B are mixed in a mass ratio of (1-2):1. The component A is composed of fluorocarbon polyurethane prepolymer, a nano inorganic filler, a hydrolysis stabilizer, a dispersing agent, a leveling agent, a tin catalyst, an initiator, hydroxy acrylate and an anhydrous diluter; and the component B is composed of a hydroxy acrylic resin, an isocyanate curing agent and an anhydrous diluter. The method can effectively enhance the crosslinking density of the polymers in the fluorocarbon coating, so that the fluorocarbon coating has more compact IPN (interpenetrating network) structure. The prepared fluorocarbon coating has the advantages of excellent weather resistance, excellent water resistance, excellent chemical resistance, excellent salt spray resistance, outstanding hardness and outstanding abrasion resistance, and is a high-performance fluorocarbon coating applicable to solar cell back panels.
Patent•
12 Aug 2014
TL;DR: In this article, a solvent-free paint composition for multipurpose and a waterproof and anti-corrosive constructing method using the same was presented, which has good adhesiveness to a base surface of diverse materials such as concrete, stainless, FRP, and has excellent applicability on a wet surface.
Abstract: The present invention relates to a solvent-free paint composition for multipurpose and a waterproof and anti-corrosive constructing method using the same. The composition includes a main material containing 50-72 wt% of an epoxy resin by a solid content, 12-20 wt% of unreactive diluents, 15-20 wt% of a sieving pigment, and 1-3 wt% of a coloring pigment; and a curing agent containing 50-75 wt% of a modified amine, 14-50 wt% of a sieving pigment, and 1-3 wt% of a coloring pigment. The main material and the curing agent are mixed by the mixing ratio of 1-5 : 1. The epoxy-based paint composition thus obtained having chemical resistance, thermoelasticity, waterproof and anti-corrosive properties and wet coatability, and a waterproof and anti-corrosive constructing method using the same are provided. The epoxy-based paint composition according to the present invention has good adhesiveness to a base surface of diverse materials such as concrete, stainless, FRP, and has excellent applicability on a wet surface. Thus, a waterproof and anti-corrosive coating layer forming a strong bond with a base surface of diverse materials in wet conditions may be formed, and the epoxy-based coating layer thus formed may exhibit good chemical resistance, thermoelasticity, waterproof and anti-corrosive properties and wet coatability.
Patent•
26 Nov 2014
TL;DR: In this paper, a high early-strength concrete composition having salt tolerance which has chloride resistance and chemical resistance improved by adding a low-heat cement having excellent chlorine ion penetration resistance and a fine sulfur powder was presented.
Abstract: The present invention relates to a high early-strength concrete composition having salt tolerance which has chloride resistance and chemical resistance improved by adding a low-heat cement having excellent chlorine ion penetration resistance and a fine sulfur powder; has a cement mixing property, tensile strength, adhesion, durability and workability improved by adding polymer for mixing cement; and has crack resistance improved by adding a crack healing agent, and to a method for repairing bridge or road pavement using the same. The high early-strength concrete composition having salt tolerance includes 10-30 wt% of a salt tolerance high-strength binder, 23-55 wt% of a fine aggregate, 23-55 wt% of a coarse aggregate,1-15 wt% of the polymer for mixing cement and 1-10 wt% of water. According to the present invention, the chloride resistance and chemical resistance of the early-strength concrete composition having salt tolerance are improved, and the cement mixing property, tensile strength, adhesion, durability and workability of the early-strength concrete composition having salt tolerance are improved to enhance the crack resistance. In addition, a concrete road and a bridge structure deteriorated due to crack, neutralization and chemical corrosion are improved so that durability is improved.
Patent•
30 Sep 2014TL;DR: In this paper, a thermoplastic polycarbonate resin composition including: about 50 to about 70 wt% of a poly-carbonate resin, about 5 to about 20 wt % of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer, about 10 to about 30 % of polyester resins, about 3 to about 15 % of maleimide-based copolymers, about 2 to about 10 % of an impact modifier, and about 0.1 to about 1.0 % of nucleating
Abstract: The present invention provides a thermoplastic polycarbonate resin composition including: about 50 to about 70 wt% of a polycarbonate resin; about 5 to about 20 wt% of a vinyl cyanide compound-conjugated diene-vinyl aromatic hydrocarbon copolymer; about 10 to about 30 wt% of a polyester resin; about 3 to about 15 wt% of a maleimide-based copolymer; about 2 to about 10 wt% of an impact modifier; and about 0.1 to about 1.0 wt% of a nucleating agent, wherein the polycarbonate resin has a melt index of about 2 to about 20 g/10 min (300 °C, 2.16 kg). The thermoplastic polycarbonate resin composition has excellent chemical resistance so as not to be damaged even by external chemicals, and at the same time, has excellent mechanical properties, including stiffness, impact resistance and heat resistance, and thus can be widely used in the electrical/electronic field, the industrial material field and the field of vehicle interior components, and particularly, satisfies the optimal requirements for vehicle interior materials.
Patent•
26 Mar 2014
TL;DR: In this paper, the authors proposed a high chemical resistance aqueous ultraviolet light-curable (UV) top-varnish, which is characterized by comprising, by weight, 60-70 parts of an aquequeous dispersion, 4-6 parts of a matting agent, 3-6 part of a film forming auxiliary agent, 1-2 part of an antifoaming agent, 2-3 parts of the thickening agent, and 26 6 parts of water.
Abstract: The present invention relates to a high chemical resistance aqueous ultraviolet light-curable (UV) top-varnish, which is characterized by comprising, by weight, 60-70 parts of an aqueous dispersion, 4-6 parts of a matting agent, 3-6 parts of a film forming auxiliary agent, 1-2 parts of a leveling agent, 1-2 parts of an antifoaming agent, 1-2 parts of a thickening agent, 4-6 parts of a photoinitiator, and 26-6 parts of water. The high chemical resistance aqueous ultraviolet light-curable (UV) top-varnish has good chemical resistance based on requirements of kitchen cabinet plates, can provide resistance for coffee stains, tomato sauce, olive oil and other commonly used basic kitchen articles, has characteristics of good adhesion and adjustable and appropriate shear viscosity, and is suitable for plant spray coating products. In addition, the high chemical resistance aqueous ultraviolet light-curable (UV) top-varnish is in the domestic leading level.
Patent•
22 Jan 2014
TL;DR: In this article, a UV-photocuring paint was developed from the following raw materials in parts by weight: 30-35 parts of bisphenol A epoxy acrylate, 23-27 parts of aromatic polyurethane acrylated, 12-15 parts of trimethylolpropane triacrylate and 5-8 parts of tripropylene glycol diacrylated.
Abstract: The invention relates to a UV (ultraviolet)-photocuring paint. The invention is characterized in that the UV-photocuring paint is prepared from the following raw materials in parts by weight: 30-35 parts of bisphenol A epoxy acrylate, 23-27 parts of aromatic polyurethane acrylate, 12-15 parts of trimethylolpropane triacrylate, 5-8 parts of tripropylene glycol diacrylate, 4-5 parts of 1-hydroxy-cyclohexylphenylketone, 1-2 parts of accelerator TETD (tetraethyl thiuram disulfide), 10-12 parts of ethyl acetate, 1-2 parts of glycide butyl ether, 2-3 parts of ethyl 2-hydroxyacrylate, 1-2 parts of p-phenylene diamine, 4-5 parts of photoinitiator 184, 1-2 parts of antioxidant 1010, 1-2 parts of titanate coupling agent TMC-TTS, 1-2 parts of crosslinking agent TAIC (triallyl isocyanurate) and 4-5 parts of dispersing aid. The paint has the film-forming efficiency of 20-23 seconds by the UV photocuring technique, and can complete film formation quickly and efficiently; and the formed film has the advantages of high surface hardness, high glossiness and high fullness, and enhances the chemical resistance, acid resistance, alkali resistance, fouling resistance, heat resistance, scalding resistance, smoke and fire resistance, aging resistance and the like.
Patent•
14 Mar 2014
TL;DR: In this article, a photoactive additive that is a cross-linkable polycarbonate resin containing a photo active group derived from a dihydroxybenzophenone is presented.
Abstract: Polymeric blends having improved flame retardance properties and good ductility at low temperatures are disclosed. The blend is formed from (A) a photoactive additive that is a cross-linkable polycarbonate resin containing a photoactive group derived from a dihydroxybenzophenone; and (B) a polymer resin which is different from the photoactive additive. The additive can be a compound, oligomer, or polymer. When exposed to ultraviolet light, crosslinking will occur between the photoactive additive and the polymer resin, enhancing the chemical resistance and flame retardance while maintaining ductility.
Patent•
02 Jul 2014
TL;DR: In this paper, an improved waterborne polyurethane UV light-cured woodware coating was presented by dispersing and mixing the following raw materials in percentage by mass.
Abstract: The invention discloses an improved waterborne polyurethane UV light-cured woodware coating prepared by dispersing and mixing the following raw materials in percentage by mass: 45-65% of an aliphatic polyurethane dispersion, 1.0-2.5% of an initiator, 2.0-3.0% of a cosolvent, 0.2-0.5% of a defoamer, 0.5-1.0% of a surfactant, 0.4-0.6% of a wetting and leveling agent, 8-15% of an active monomer, 15-20% of deionized water, 0-3.5% of matting powder and 1-2% of a thickener. A stable waterborne UV emulsion system is obtained by selecting proper light-cured resin and the active monomer, and is subjected to self-drying firstly and UV light curing secondly, so that the coating is improved in drying speed, environment-friendly and odorless; an obtained paint film is good in fullness, high in harness, good in transparency and chemical resistance, resistant in wiping, good in comprehensive performances such as water resistance, alcohol resistance and wear resistance, good in adhesive force, harness and glossiness, simple in construction, low in cost, high in efficiency and adaptable in industrial production.
Patent•
20 Mar 2014
TL;DR: In this paper, a novel silicone diacrylate compound and a production method of the same were presented and the present invention also provided a composite sheet with excellent thermal resistance and chemical resistance while having transparency.
Abstract: The present invention provides a novel silicone diacrylate compound and a production method of the same. The present invention also provides a composite sheet with excellent thermal resistance and chemical resistance while having transparency by applying the silicone diacrylate compound. The silicone diacrylate compound is denoted by chemical formula 1. In the chemical formula 1, R1 is hydrogen or a methyl group; R2-R4 are a methyl group or a phenyl group; R5-R6 are hydrogen; and R7 is hydrogen or a phenyl group.
Journal Article•
TL;DR: In this article, the chemical resistance of Bamboo/Glass reinforced polyester hybrid composites to acetic acid, Nitric acid, Hydrochloric acid, Sodium hydroxide, Sodium carbonate, Benzene, Toluene, carbon tetrachloride and water was studied.
Abstract: The chemical resistance of Bamboo/Glass reinforced polyester hybrid composites to acetic acid, Nitric acid, Hydrochloric acid, Sodium hydroxide, Sodium carbonate, Benzene, Toluene, carbon tetrachloride and water was studied. The flexural properties of these composites were also studied. The effect of alkali treatment of bamboo fibers on these properties was studied. It was observed that the flexural properties of the hybrid composites increase with glass fiber content. These properties found to be higher when alkali treated bamboo fibers were used in hybrid composites. The hybrid fiber composites showed better resistance to the chemicals mentioned above. The elimination of amorphous hemi-cellulose with alkali treatment leading to higher crystallinity of the bamboo fibers with alkali treatment may be responsible for these observations.
Patent•
06 Aug 2014
TL;DR: In this article, a polymer composite emulsion for metal surface treatment and a preparation method thereof is presented. And the preparation method consists of three steps: step 1, preparing a modified nano-montmorillonite dispersion liquid; step 2, preparing nano-mono-morillonites modified emulsion; and step 3, preparing the polymer composites for metal surfaces treatment.
Abstract: The invention discloses a polymer composite emulsion for metal surface treatment and a preparation method thereof. The polymer composite emulsion for metal surface treatment comprises the following ingredients in percentage by mass: 25-35% of monomer, 0.5-1.5% of functional monomer, 0.5-1.5% of organosilicone monomer, 0.25-1.4% of modified nano-montmorillonite, 0.5-1.5% of cationic surface active agent, 0.5-1.4% of conductive polymer monomer, 0.01-0.1% of pH regulator, 0.2-0.3% of initiator, 1.0-3.0% of oxidant, and the balance of deionized water. The preparation method thereof comprises three steps: step 1, preparing a modified nano-montmorillonite dispersion liquid; step 2, preparing a nano-montmorillonite modified emulsion; and step 3, preparing the polymer composite emulsion for metal surface treatment. The polymer composite emulsion for metal surface treatment and the preparation method thereof disclosed by the invention adequately embody a 'low-carbon' effect, realize high performance for the polymer emulsion, and improve the performance indexes of a coating in the terms of hardness, wear resistance, solvent resistance, chemical resistance and the like.