Showing papers on "Chemical resistance published in 2017"

Synthesis and properties of phosphate-based diacrylate reactive diluent applied to UV-curable flame-retardant wood coating

Abstract: The diacrylate reactive diluent was synthesized by reacting glycidyl methacrylate, piperazine, and cyclic ethylene chlorophosphate. The synthesized reactive diluent was utilized to formulate UV-curable wood coating. The weight fractions of reactive diluent were varied from 0 to 25% in coating formulation with constant photoinitiator concentration. The molecular structure of reactive flame retardant was evaluated by FTIR, mass spectroscopy, 31PNMR, and 1HNMR spectral analysis. The flame retardant behaviors of the cured film were evaluated from limiting oxygen index and UL-94 vertical burning test. Thermal stability was estimated from thermogravimetric analysis and differential scanning calorimetry. The effects of varying concentrations of reactive diluent on the viscosity of the formulation along with optical, mechanical, and chemical resistance properties of coatings were evaluated. The gel content, water absorption behavior, and stain resistance of coatings were also studied.

20 – Surface Modification of Plastics

Abstract: This chapter gives an overview of different methods for improving surface properties of plastics. Plastics are inherently hydrophobic, low surface energy materials and thus do not adhere well to other materials. Adhesion improvement is the most common application but other surface characteristics, such as wettability, water- and chemical resistance, nonfouling, tribological behavior, oxygen, and moisture transmission are also addressed. It has been estimated that 70% of the total production of plastic materials must be surface treated prior to processing. The methods range from vacuum to atmospheric pressure, wet to dry, simple to sophisticated, and inexpensive to very costly to obtain the required functional characteristics of plastics. Most methods used today are dry and environmentally sound. The methods presented are roughly divided in surface activation (e.g., plasma, corona, flame, and UV laser) and surface coating (e.g., plasma polymerization, chemical vapor deposition, Parylene, physical vapor deposition) techniques.

Properties and structure of heterogeneous ion-exchange membranes after exposure to chemical agents

Abstract: This work deals with resistance of ion-exchange membranes in selected chemical solutions. Specimens of heterogeneous membranes were analyzed after exposure to chemically aggressive agents such as nitric acid, sodium hydroxide, etc. The analyses were carried out after period up to 6 months. The chemical resistance was evaluated from the mechanical and electrochemical property changes’ point of view before and after exposure. The tested materials were not only the membranes themselves but also their individual components, i.e., ion-exchange resins from various manufacturers and polyester reinforcing fabrics. The results show that exposure to NaOH solution has the most damaging effect especially on reinforcing fabric and a membrane as whole due mainly to dimension changes. The same stands for electrochemical resistance of the membrane and permselectivity. Ion-exchange capacity remains almost the same after exposure.

3-D printed fluoropolymer structures

Abstract: The invention relates to fluoropolymer filament for use in 3-D printing, and 3-D printed fluoropolymer articles having low warpage, excellent chemical resistance, excellent water resistance, flame resistance, and good mechanical integrity. Additionally, the articles of the invention have good shelf life without the need for special packaging. In particular, the invention relates to filament, 3-D printed polyvinylidene fluoride (PVDF) articles, and in particular material extrusion 3-D printing. The articles may be formed from PVDF homopolymers, copolymers, such as KYNAR® resins from Arkema, as well as polymer blends with appropriately defined low shear melt viscosity. The PVDF may optionally be a filled PVDF formulation. The physical properties of the 3-D printed articles can be maximized and warpage minimized by optimizing processing parameters.

High-hardness scratch-resistant ABS material and preparation method thereof

Abstract: The invention discloses a high-hardness scratch-resistant ABS material and a preparation method thereof and belongs to the technical field of polymer materials. The high-hardness scratch-resistant ABS material comprises, by weight, 40-80 parts of ABS resin, 15-50 parts of polymethyl methacrylate, 5-20 parts of a compatibilizer, 0.3-1 part of a lubricant, 2-10 parts of a toughening agent, 0.3-0.7 parts of an antioxidant and 1-5 parts of a metallic toner. The metallic toner is subjected to organic coating treatment and is a pigment having particle sizes of 11-65 microns. Polymethyl methacrylate is added into ABS resin as a base so that the high-hardness scratch-resistant ABS material has the advantages of high impact, high hardness, scratch resistance and no need of spray coating. The metallic toner is a metal pigment subjected to organic coating treatment, improves dispersion of the aluminum powder or the copper powder in the base ABS, improves the corrosion resistance of the aluminum powder or the copper powder, and greatly improves the chemical resistance of the composite material. The preparation method is simple. The prepared material has no pollution.

Flexible epoxy novolac coatings: Use of cardanol‐based flexibilizers

Abstract: Flexible epoxy novolac coatings were developed by reacting an epoxy novolac resin, poly[(phenylglycidyl ether)-co-formaldehyde] (PPGEF) with an amine curing agent, 4,4′-diamino-3,3′-dimethyldicyclohexyl methane (BMCHA), cardanol based reactive diluent (Cardolite NC-513) and two different cardanol-based flexibilizers (Cardolite NC-514 and Cardolite NC-547). The flexibilizer content was varied from 5 to 10% by weight of the resin. These resins were coated onto the stainless steel panels and tested for their gloss, cross-hatch adhesion, falling weight impact resistance, flexibility, abrasion, scratch hardness, solvent scrub resistance, and chemical resistance. The thermo-mechanical properties of these coatings were determined by TGA, DSC, DMTA, and tensile strength measurements. The cryofractured specimens were subjected to SEM analysis. The influence of structural differences of two flexibilizers on the coating properties was investigated. These coatings exhibited excellent properties and have great potential in industrial applications. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44920.

Binder resin and photosensitive resin composition containing same

Abstract: The present invention relates to a photoresist composition as an organic material for a display, such as TFT-LCD, OLED, and TSP, and to a binder resin applied to a coating material. The present invention is characterized by having high functionality and high performance characteristics, such as heat resistance, chemical resistance, high transmittance, and high refractivity.

Graphene-modified waterborne anticorrosive coating

Abstract: The invention relates to a grapheme-modified waterborne anticorrosive coating. The grapheme-modified waterborne anticorrosive coating is composed of a grapheme-modified waterborne alkyd resin, pigment and filler, a cosolvent, a leveling agent, a dispersing agent, a wetting agent, a defoaming agent, a thickening and anti-settling agent, a flash rust inhibitor, a pH value regulator and deionized water, wherein the graphene polyurethane-modified waterborne alkyd resin is prepared from vegetable oil or fatty acid, organic acid anhydride, dimethylolpropionic acid, polyol, grapheme, polyisocyanate and deionized water through a reaction. The prepared grapheme-modified waterborne anticorrosive coating integrates the advantages of grapheme and polyurethane, has properties like high hardness, good adhesion, good chemical resistance, antistatic performance, corrosion resistance, aging resistance and good mechanical properties, and is endowed with excellent corrosion resistance, aging resistance, excellent mechanical properties and antistatic performance.

Surface modification of cellulose-containing materials with solutions of tetrafluoroethylene telomers

Abstract: Modification of cellulose-containing materials (wood veneer, paper) with solutions of radiationsynthesized tetrafluoroethylene telomers was studied. Treatment with a solution of tetrafluoroethylene telomers enhances the ultimate strength, chemical resistance, and flame resistance of the materials and decreases the yield of extractable substances in treatment with organic solvents.

Properties of standard polymeric and water-based coatings for military camouflage protection with addition of inorganic fulerene-like tungsten disulphide (IF-WS2) nanoparticles

Abstract: The possibility of improving the properties of the standard polymeric and a water-based coating for military camouflage protection by adding nanoparticles of inorganic fulerene-like tungsten disulphide (IF-WS2). Nanoparticles were added and dispersed in paint by ultrasonic irradiation. The paints were applied to standard steel plates, and dried, for examinations of chemical resistance to aggressive media and of the following physical-mechanical properties: hardness, flexibility, elasticity, abrasion resistance, resistance to steel balls impact and adherence. These properties were compared for paint without and with IF-WS2 nanoparticles. The effect of adding IF-WS2 on rheological properties of the paints has been examined using Dynamic Mechanical Analysis (DMA), observing viscosity as a function of the shear rate. Camouflage properties were also examined - IR reflection and colorimetry. Significant improvements of mechanical resistance to abrasion and steel balls impact, as well as hardness, have been achieved.

Diamine compound, and heat-resistant resin or heat-resistant resin precursor using same

Abstract: Provided are: a photosensitive resin composition which has excellent pattern processability (high sensitivity and high resolution) and can exhibit excellent chemical resistance and heat resistance after being thermally treated; a heat-resistant resin or a heat-resistant resin precursor which can be used in the photosensitive resin composition; and a diamine compound which is a raw material for the heat-resistant resin or the heat-resistant resin precursor. A diamine compound represented by general formula (1).

Synthesis and characterization of cellulose acetate naphthoate with good ultraviolet and chemical resistance

Abstract: Abstract Commercial cellulose diacetate with a degree of substitution (DS) of 2.45 was partly deacetylated to cellulose acetate (CA) with different DSs by acid-catalyzed hydrolysis and then reacted with 1-naphthoyl chloride (NpCl) to synthesize CA naphthoate (CANp). Fourier transform infrared and 1H-NMR were used to characterize the chemical structure of CANp. The DS of naphthoate moiety (DSCANp) could be varied from 0.18 to 0.98 by adjusting the molar ratio of –OH in CA unit to NpCl, the DS of CA (DSCA), and the reaction time and temperature. When DSCA was 2.01 and the molar ratio was 1:6, the maximum DSCANp of the product was achieved after a reaction at 80°C for 2 h. With the increase of DSCANp, the thermal stability decreased slightly whereas the anti-ultraviolet property was enhanced. Moreover, the obtained films containing CANp exhibited good ultraviolet resistance as well as chemical resistance.

Basalt-long-fiber-enhanced polypropylene composite material and application thereof

Abstract: The invention discloses a basalt-long-fiber-enhanced polypropylene composite material and an application thereof. The basalt-long-fiber-enhanced polypropylene composite material is prepared from raw materials such as modified basalt fiber, high-melt-index polypropylene PP, a compatilizer, an elastomer and high-mesh-number talcum powder, and is used for preparing an automobile battery box. The basalt-long-fiber-enhanced polypropylene composite material and the application disclosed by the invention have the advantages that the preparation method is simple and the comprehensive performance is excellent; the prepared battery box has the advantages of high strength, excellent impact resistance, creep resistance, high size stability, excellent heat resistance, fatigue resistance and chemical resistance and light weight; the basalt-long-fiber-enhanced polypropylene composite material can be combined with for producing high-strength products with more complex structures; and the production period is short, the production cost is low, and the basalt-long-fiber-enhanced polypropylene product can be recycled, so that the environment-friendly effect is good.

Chemical-resistant polyurethane elastomer and polyvinyl chloride composite cable material

Abstract: The invention discloses a chemical-resistant polyurethane elastomer and polyvinyl chloride composite cable material. The material is prepared from raw material in parts by weight as follows: 60-65 parts of thermoplastic polyurethane elastomers, 35-40 parts of polyvinyl chloride, 0.1-0.12 parts of stearic acid, 5-6 parts of calcium benzoate, 0.8-1 part of a methyl tin mercaptide heat stabilizer, 0.2-0.3 parts of a titanate coupling 131, 19-20 parts of epoxidized soybean oil, 1-2 parts of dibenzothiazyl disulfide, 1-1.5 parts of hydroxyl silicone oil, 2-3 parts of quaternary ammonium salt montmorillonite, 5-6 parts of nano silica, 3-4 parts of a silane coupling agent KH550, a proper amount of toluene and a proper amount of deionized water. the cable material has excellent chemical resistance, can resist corrosion of salt, oil, aldehyde, ether, alkyne, strong acid, strong base and other substances, has good mechanical performance, wear resistance, aging resistance and the like, is long in service life and has higher popularization and application value.

Epoxy color sand coating

Abstract: The invention discloses an epoxy color sand coating. A component A is prepared from the following materials in parts by weight: 60 to 80 parts of bisphenol A type epoxy resin, 20 to 40 parts of ethylene glycol diglycidyl ether, 2.5 to 5 parts of phenyl glycidyl ether, 0.1 to 0.8 part of elastic polyurethane, 10 to 20 parts of quartz powder, 10 to 15 parts of talcum powder, 120 to 160 parts of color sand of 80 to 120 meshes, 0.5 to 1.0 part of a dispersing agent, 1.0 to 1.2 parts of a leveling agent, 1 to 1.5 parts of a defoaming agent and 8 to 10 parts of color paste; a component B is prepared from the following materials in parts by weight: 20 to 25 parts of modified polyamide and 1.0 to 1.5 parts of tertiary amine. The epoxy color sand coating has a rich and colorful color and has the characteristics of high decorative effect, high abrasion resistance, excellent heavy load resistance, impact resistance and chemical resistance, high intensity, high hardness, high slip resistance, high water resistance, easiness in construction and maintenance, wide application range and the like.

High-surface glossiness and high-dimensional stability polyamide composite material and preparation method thereof

Abstract: The invention belongs to the technical field of polymeric composite materials, and particularly relates to a high-surface glossiness and high-dimensional stability polyamide composite material and a preparation method thereof. In parts by weight, the polyamide composite material is prepared from the following components: 30 to 90 parts of polyamide; 5 to 15 parts of semi-aromatic polyamide; 0.1 to 1.0 part of coupling agent; 0.1 to 1.0 part of antioxidant; 0 to 1.0 part of heat-resistant agent; 0.1 to 2.0 parts of lubricating agent; 0.1 to 1.0 part of fluidity-improving agent; 20 to 50 parts of glass fibers; and 0 to 10 parts of filler. The polyamide composite material disclosed by the invention has high glossiness, high fluidity, chemical resistance and good mechanical properties; moreover, after moisture is absorbed, the decrease of the physical properties of the material is little, the dimensional stability is high, wear and abrasion can be resisted, heat resistance is good, and the processability is good.

Functional ceramic composition with waterproof and anti-corrosiveness and protecting method of concrete structure with eco-friendly waterproof and anti-corrosiveness therewith

Abstract: The present invention relates to a functional ceramic composition for a waterproof agent and an anticorrosive, the functional ceramic composition which is excellent in strength, adhesive strength, chemical resistance, heat resistance, ozone resistance, UV resistance and durability, and an eco-friendly waterproof agent and anticorrosive constructing method of a concrete structure using the functional ceramic composition. The functional ceramic composition of the present invention is prepared by hydrolyzing into one component form an alkoxy silane and a mixture of a silicone resin with excellent water repellency and waterproof property, polyvinyl chloride with excellent tractility, adhesion properties and chemical resistance, polyvinylidene fluoride with excellent chemical resistance, ozone resistance, heat resistance and insulation properties, lauryl acrylate with excellent tractility and durability, and an inorganic filler with excellent strength, abrasion resistance, heat resistance, chemical resistance and durability. Accordingly, the functional ceramic composition according to the present invention exhibits excellent water resistance, ozone resistance, UV resistance, durability and air permeability after curing without requiring high temperature treatment or the like for the formation of a film since the composition is cured at room temperature. The functional ceramic composition according to the present invention can be prevented from being easily exfoliated from a base surface or easily cracked on a coated surface since the composition has a coefficient of thermal expansion similar to that of the concrete structure and excellent adhesion force. Further, the functional ceramic composition according to the present invention has a more improved effect of preventing corrosion of the concrete structure since the composition is coated on the surface of the concrete structure compared to conventional epoxy resin-based waterproof agent and anticorrosive.

High-temperature-resistant epoxy-phenol resin paint for heat exchanger corrosion resistance and preparation method thereof

Abstract: The invention discloses a high-temperature-resistant epoxy-phenol resin paint for heat exchanger corrosion resistance and a preparation method thereof The high-temperature-resistant epoxy-phenol resin paint is prepared from the following components in parts by weight: 25-35 parts of epoxy resin, 30-40 parts of phenolic resin, 10-15 parts of chrome oxide green, 15-20 parts of superfine mica powder, 5-8 parts of carbon black, 3-5 parts of colloidal graphite, 05-1 part of gas-phase silicon dioxide, 5-8 parts of diluter, 1-2 parts of defoaming agent and 1-2 parts of leveling agent The high-temperature-resistant epoxy-phenol resin paint combines the favorable adhesiveness and corrosion resistance of the epoxy resin, the excellent chemical resistance of the phenolic resin, and the heat resistance, acid/alkali resistance, high temperature resistance, high moisture resistance, flexibility and wear resistance of the other components The workability of the paint is improved, so that the coating can adapt to various severe corrosion environments, and is especially suitable for various corrosion resistance application environments faced by heat exchangers of production devices for petroleum, chemical industry, power plants, pharmacy and the like

High-flow polyphenylsulfone compositions

Abstract: A high-flow polymer composition includes a polyphenylsulfone (PPSU) and a PEEK-PEDEK copolymer. The polymer composition surprisingly exhibits improved toughness while maintaining chemical resistance, making it suitable for the manufacture of shaped articles where a combination of high-flow, impact resistance, and chemical resistance are required.

High-performance environment-friendly water-based bicycle coating and preparation method thereof

Abstract: The invention provides a high-performance environment-friendly water-based bicycle coating and a preparation method thereof. The coating is prepared from, by weight, 5-13 parts of mixed etherified melamine formaldehyde resin, 10-15 parts of water-based epoxy modified acrylic resin, 5-10 parts of water-based organic fluorine modified acrylic resin, 30-50 parts of water-based acrylic resin, 0-30 parts of semi-finished color paste, 10-15 parts of deionized water, 0-5 parts of ethylene glycol monobutyl ether, 3 parts of dimethylethanolamine, 5-10 parts of propylene glycol monomethyl ether, 0.5 part of anti-sagging agent, 1 part of a leveling agent, 0.1 part of a defoaming agent, 0-0.1 part of dinonylnaphthalene disulfonic acid and 0.2 part of a wetting agent. The high-performance environment-friendly water-based bicycle coating is high in adhesive force and good in substrate wettability, and has the good weather resistance, cold resistance, soiling resistance and chemical resistance.

Environment-friendly high-and low-temperature resistant oil-resistant polyvinyl chloride cable sheathing compound

Abstract: An environment-friendly high-and low-temperature resistant oil-resistant polyvinyl chloride cable sheathing compound is composed of the following raw materials (by weight): 100 parts of polyvinyl chloride resin, 50-70 parts of a trimellitate plasticizer, 4-12 parts of a Ca-Zn composite stabilizer, 10-35 parts of a filler, 10-35 parts of copolymer resin, 15-35 parts of thermoplastic elastomer resin, 5-10 parts of diantimony trioxide, a flame retardant synergist being less than or equal to 6 parts, 0.4-2.0 parts of an antioxidant, and 0.3-2.8 parts of an ultraviolet absorber. The product has excellent low temperature resistance, heat resistance, oil resistance, weather resistance and the like. Toughness, low temperature resistance and oil resistance of the product are enhanced. The product has properties such as heat resistance, oil resistance, elasticity, flexibility, chemical resistance and the like. The product is endowed with heat resistance, weatherability and other comprehensive properties. Low cost of the sheathing material for cables of charging piles is realized.

Polyurethane Rubber-Based Nanoblends: Preparation, Characterization and Applications

Abstract: To improve the mechanical, thermal, flame, moisture and chemical resistance, of Ealstomer polyurethane (TPU) (Thermoplastic), the TPU is blended with different types of the nanoparticles, such as, the nanoclay and carbon nanofibers (CNFs) to form nanocomposites. Different examples of TPU material based on polyester or polyether pre-polymers, were manufactured, that contains a linear segmented block composed of soft segments which is aliphatic polyester polyols or aliphatic polyether polyols are coupled with hard segment formed from aromatic di-isocyantes and hard diols urethane linkages. The structures of the different blends of TPU-nanofillers samples were characterized by FTIR spectroscopy, XRD and the particle diameter of CNTs, clay and TPU-clay blending samples was determined by using transmission electron microscopy (TEM). The XRD characterization showed the shifting position of the diffraction peak of the nanoclay powder intercalated in the polymer matrix. This emphasizes that the melt blending is the most promising and practical method to be used in industry, where, solvents are not required, to produce nanocomposites based on usual compounding devices, such as, extruders or blends. So it was clear that the TPU-nanofillers blend showed an improved thermal resistance, mechanical properties and physical properties.

Polyurethane micropore elastomer composite material of low spring rate ratio for urban rail and preparation method thereof

Abstract: The invention provides a polyurethane micropore elastomer composite material of low spring rate ratio for urban rail and a preparation method thereof, and belongs to the field of polyurethane materials. The material has the excellent performance of high strength, wear resistance, flex resistance, low temperature resistance and oil resistance, chemical resistance and the like, and has the characteristics of low buffer stress, stable damping, short response time and the like. The polyurethane micropore elastomer composite material of low spring rate ratio for urban rail comprises a polyurethane main material, the polyurethane main material is prepared by mixing a component A and a component B, the component A is prepared by the following materials: 75-90% of polyether polyol, 8-18% of a chain extender, 0.5-1% of an anti-oxidant, 0.5-1% of an amine catalyst, 0.1-0.5% of a foaming agent, 1-4% of an organosilicon foam stabilizer, and 0.1-0.5% of color paste. The materials are uniformly mixed at 100-120 DEG C, the water content in the mixture is below 0.05%, and that is the component A; the component B is obtained by a reaction of 30-60% of isocyanate and 40-70% of polyol at 80-90 DEG C for 3-4 hours.

Surface protecting uv-curable coating composition

Abstract: The present invention relates to a UV-curable coating composition for protecting the surface of plastic, which was strengthened in wear resistance and scratch resistance. According to the present invention, the UV-curable coating composition has excellent attachability to plastic and polycarbonate (PC) materials, heat resistance, wear resistance to external shocks and the environment, the scratch resistance, chipping resistance, and chemical resistance. The UV-curable coating composition has excellent weather resistance under the condition of UV-rays and visible rays so the present invention doesnt go through exterior changes like the discoloration of a film, a crack, and so on even under the condition of harsh and long-time outdoor use. Thus, the coating composition is very useful for surface coating of transparent materials like transparent plastic lens, especially a headlamp polycarbonate (PC) lens of vehicle.