Showing papers on "Thermoplastic polyurethane published in 1982"

Laminate of thermoplastic resinous composition

Abstract: Disclosed is a soft and flexible thermoplastic resinous composition having high impact and tear resistances, a good processability and a good thermal adhesion to a wide variety of plastic and other materials. The resinous composition consists essentially of 5 to 70 wt. % of a thermoplastic polyurethane elastomer and 30 to 95 wt. % of a modified polyolefin or an olefin copolymer, having functional groups of at least one type selected from carboxyl, carboxylate salt, carboxylic anhydride, amide, hydroxyl and epoxy groups. A typical application of the thermoplastic resinous composition is a laminate having at least two lamine bonded to each other, at least one of the laminae being comprised of the above-mentioned resinous composition and the other being comprised of at least one material selected from vinyl chloride polymer resins, vinylidene chloride polymer resins, thermoplastic polyester resins, ethylene/vinyl alcohol copolymer resins, polyamide resins, polyacrylonitrile and nitrile copolymer resins, polystyrene and styrene copolymer resins, polymethyl methacrylate and acrylic copolymer resins, polyurethane resins, olefin polymer resins, polyacetal resins, polyvinyl acetal resins, polycarbonate resins, polyphenylene oxide resins, polysulfone resins, epoxy resins, phenol-formaldehyde resins, unsaturated polyester resins, melamine-formaldehyde resins, urea-formaldehyde resins, natural and synthetic rubbers, cellulosic materials, cement, glass and other ceramic materials and metals.

Composite structure of an aromatic polyamide fabric coated with a fluorosilicone rubber

Abstract: A composite sheet structure is provided comprising an aromatic polyamide fabric (1) coated on both sides with a 2 to 30 mil thick layer of a fluorosilicone rubber (2) and having a dielectric constant of about 4 to 8 and a dissipation factor of about 0.015 to 0.030; the composite structure is useful as an insulating blanket that is used in a dielectric press to emboss laminates of thermoplastic polyurethane foam/short napped synthetic velour fabric used as upholstery for automobiles and trucks.

Low-halogen-content, thermoplastic polyurethane elastomer having improved flame resistance by the addition of a 4-component additive combination, its production and its use

Abstract: The present invention relates to low-halogen-content, thermoplastically-processible polyurethane elastomers (TPU), to which are added antimony trioxide, chlorinated and/or brominated aromatic compounds having a specified halogen content, aluminum hydroxide having a specified particle size, phosphoric acid tris-ester, and, optionally, quaternary tetra-alkyl ammonium salts. These additives impart an unexpectedly favorable combination of electrical surface properties, flameproof behavior and abrasion resistance.

Thermoplastic ternary molding composition of polyurethane polyphosphonates and polycarbonate resins

Abstract: The invention is directed to a molding composition comprising an intimate, well dispersed blend of thermoplastic polyurethane, thermoplastic polyphosphonate and thermoplastic polycarbonate which composition is characterized by an improved level of flame resistance. A process for the preparation of said composition is also disclosed.

Flame retardant tertiary polymer blend

Abstract: Thermoplastic compositions are disclosed which comprise blends of about 50 to about 85 percent by weight of a thermoplastic polyurethane and the balance of the blend comprising (a) a polyvinyl halide resin and (b) a diene-nitrile copolymer rubber, the weight ratio of (a) to (b) being within the range of from about 1:4 to about 15:1 The novel blends do not melt or spread flaming drip when combusted but rather form chars The blends are optionally fire retarded by the addition of flame retardants The fire retarded blends find utility in, inter alia, electric wire and cable jacketing where a high degree of fire retardance is required The blends without fire retardants provide a good thermoplastic polyurethane at lower cost than the polyurethanes alone and find utility in those applications normally associated with polyurethanes such as films, footwear, wire jacketing, and particularly those applications calling for a higher degree of oil resistance than polyurethanes alone

Thermoplastic resin composition

Abstract: PURPOSE:To obtain a thermoplastic resin composition containing an AS resin having a high vinyl cyanide compound content and a thermoplastic elastomer and preferably further an ABS resin, having excellent coating property and capable of providing a coating film having high adhesive strength. CONSTITUTION:The objective thermoplastic composition being a composition consisting of (I) a copolymer composed of a vinyl cyanide compound (A), an aromatic vinyl compound (S) and as necessary, a monomer (M) copolymerizable therewith and satisfying formula I and (II) a thermoplastic polyurethane elastomer and satisfying formula II or (III) graft copolymer containing the copolymer (I) and elastomer (II) at a ratio satisfying formula III and obtained by copolymerizing a rubber based polymer with A, S and arbitrarily M at a ratio satisfying formula I and being <=15000ppm in total amount of low-boiling point compound having <=150 deg.C boiling point existing in the composition and having excellent coating property, especially when an urethane coating is used.

Thermoplastic polyurethane compositions of improved flame retardance

Abstract: The present invention is directed to a thermoplastic molding composition comprising thermoplastic polyurethane and a member selected from the group consisting of polyarylphosphonate and polyarylphosphonatocarbonate which composition is characterized by its improved flame retardance.

Thermoplastic Polyurethane Elastomer Melt Polymerization Study

Abstract: It is concluded from the present study that the slightly modified Brabender PlastiCorder torque rheometer is well suited to the study of thermoplastic polyurethane elastomer melt polymerization. The instrument is sensitive and responsive enough over a broad range to sense and record continuously even small changes in polymerizate temperature and viscosity as a function of time. This capability has enabled us to follow the full course of such polymerizations, with the exception of the final polymer maturation process which customarily is effected in the quiescent state. In our study, the effects of several polymerization variables were clearly and quantitatively apparent, including the effects on the course of polymerization and its degree of: macroglycol acidity; antioxidant (stabilizer); temperature; catalyst; polymer composition; presence of shortstop; and reactant balance. The results demonstrate the known acid catalysis of the hydroxyl-isocyanate reaction as well as polyurethane molecular wei...

Method for making laminated ophthalmic lenses

Abstract: A laminated lens assembly consists of a glass lens (9) and a composite, integral, optically transparent organic polymeric sheet (1) bonded thereto. The polymeric sheet (1) is composed of a thin thermoplastic polyurethane ply (1A) and a thick thermosetting polyurethane ply (1B). The thermoplastic ply (1A) is bonded to glass lens (9) after the surface of each has been properly cleaned via a blast of deionized air and antistatic brushing. The lens assembly is particularly suitable for eyeglasses.

Production of polyurethane sheet

Abstract: PURPOSE:To prevent the sticking of a sheet to a roll and the blocking between sheets by a method wherein a double-layer sheet is produced by coextrusion such that an olefin based resin layer is extruded on the side for contact with the first cooling roll and a thermoplastic polyurethane elastomer layer is extruded on the other side. CONSTITUTION:When coextruding a polyurethane elastomer and polyethylene in two layers, the polyethylene layer 3 is provided on the side for contacting with the first cooling roll 2, whereby a molten polyurethane layer 4 can be cooled without contacting directly with the roll 2. The cooled double-layer sheeet is wound up around a paper tube as it is. Accordingly, there is no contact between parts of the polyurethane sheet and therefore no blocking can occur between sheets. When the polyurethane layer 4 is to be used, the polyethylene layer 3 is peeled off, which can be performed easily.

Process for the preparation of articles having thin walls from thermoplastic polyurethanes or polyurethane urea by extrusion

Abstract: 1. Process for the production of thin-walled articles of thermoplastic polyurethanes and polyurethane ureas by extrusion or blow moulding, characterised in that the thermoplastic polyurethane or the thermoplastic polyurethane urea is synthesised from A) at least one long-chain compound which contains substantially 2 hydroxyl groups and has molecular weights between 400 and 10 000 and can optionally contain a relatively high molecular weight compound containing more than 2 hydroxyl groups of which the average molecular weight is also within the indicated range, in a proportion of up to 40% by weight, B) one or more aliphatic, cycloaliphatic, aromatic or araliphatic diisocyanates, C) at least one substantially difunctional chain-lengthening agent which reacts with isocyanate groups and has a molecular weight of 60-300 and optionally water, D) 0.1-15 per cent by weight, based on the total product, of a silicon compound, which reacts with isocyanate groups, of the general formula see diagramm : EP0078958,P9,F1 wherein W and Y are identical or different and denote OH, COOH, NH2 , NHZ, SH, R'OH, R'COOH, R'NH2 , R'NZZ, R'NHZ or R'SH, X denotes a divalent organic radical which has up to 6000 molecular weight units and optionally contains hetero atoms, Z denotes an optionally OH-, COOH-, NH2 -, NH-alkyl-, or SH-substituted alkyl, cycloalkyl, aryl or aralkyl radical, R denotes an alkyl, cycloalkyl, aryl and/or alkoxy radical with 1-6 C atoms, R' denotes an alkylene radical which has up to 6000 molecular weight units, is optionally interrupted by ether, ester, thioether or amino groups and can optionally be linked to the silicon via hetero atoms such as, for example, oxygen or sulphur, m and n are integers, it being possible for m or n to be 0 and E) 0.05-5% of at least one release agent which is normally to be regarded as inert towards isocyanate and hydroxyl groups, the molar ratio of the NCO groups to groups in components A, C and D which react with these NCO groups being between 0.85:1 and 1.2:1 and the molar ratio of C:A being between 0.2:1 and 30:1.

Production of thermoplastic polyurethane resin composition

Abstract: PURPOSE: To obtain a thermolastic polyurethane resin composition useful in the production of moldings, films, coatings, interior or exterior materials of vehicle, etc., having excellent mechanical properties, by introducing an organopolysiloxane bond into the molecular chain. CONSTITUTION: A polymer diol (A) with an average MW of 500W10,000, an organic diisocyanate (B) and, optionally, a chain extender (C) having two active hydrogen atoms and average MW≤500, and further a crosslinking agent (D) having at least three active hydrogen atoms are allowed to react with each other under the below-mentioned condition. Namely, the titled resin composition is obtained by carrying out the above reaction under conditions where the ratio of the total number of the active hydrogen atoms contained in the below-mentioned carbinol and components C and D, if used, to the number of the isocyanato groups in component B is 1:0.85W1:1.1, and using an organopolysiloxane dicarbinol as part or whole of the component A. Further, this composition is mixed with a composition prepared from an organic diol and component B to obtain another titled composition. COPYRIGHT: (C)1983,JPO&Japio

Method for modifying and molding thermoplastic polyurethane resin

Abstract: PURPOSE:To obtain a molded article which retains the hardness of a polyurethane resin and has improved heat resistance, by mixing a polyisocyanate compd having a specified MW with a thermoplastic polyurethane resin and thermoforming the mixture CONSTITUTION:A polyisocyanate compd having an MW of 300 or higher is mixed with a thermoplastic polyurethane resin The mixture is thermoformed When said polyisocyanate has an MW less than 300, the amount of addition is reduced, but there is a tendency to form molded articles having variability in physical properties due to the variation of the amount of addition and heat resistance can not stably be improved Examples of said thermoplastic polyurethane resins are those obtd by using a polyol having an MW of 500-6,000 such as polyethylene adipate or polycaprolactone, an org diisocyanate such as 4,4'- diphenylmethane diisocyanate and a chain extender such as a glycol

Polyurethane resin composition

Abstract: PURPOSE:An organic solvent-soluble rigid thermoplastic polyurethane resin excellent in abrasion resistance and surface lubricity, prepared by reacting an organic diisocyanate compound with two kinds of dihydroxy compounds at a specified ratio. CONSTITUTION:A urethane resin having repeating units represented by formula IV, wherein A, B and D are residues of compounds (ii), (iii) and (i), respectively, and f>e>=0, is obtained by reacting an organic diisocyanate compound (i), e.g., hexamethylene diisocyanate, with a dihydroxy compound (ii) of MW 800- 3,000, e.g., polyester diol or polyether diol, and a dihydroxy compound (iii) represented by formulaI, wherein R is H or CH3 and n+m=3-8, under conditions which satisfy relationships II and III wherein X, Y and Z are mol% of compounds (i), (ii) and (iii), respectively.

Polyurethane foams suitable for high frequency welding and process for producing the same

Abstract: This invention relates to polyurethane foams capable of being welded by high frequency welding and a process for producing the same, characterized by the addition of certain ammonium salts of acids containing phosphorus to the starting components for the polyurethane foam in order that the polyurethane starting materials and the polyurethanes contain from 0.1 to 10%, by weight, of ammonium salts of phosphorus-containing acids. Phosphorus-containing ammonium salts which are available in the liquid form and completely soluble in polyols are particularly suitable with salts of phosphoric acid mono- and dibutyl esters, dialkyl phosphinic acids, alkyl phosphonic acids and alkyl phosphonic acid monomethyl esters being preferred. The addition of these acids significantly increases the dielectric loss factor of thermoplastic polyurethane foams and, therefore, also considerably increases their capacity for being welded by high frequency welding.

Thermoplastic polyurethane elastomer being poor in halogen by the addition of a four-additives combination, its preparation and its use

Abstract: Die Erfindung betrifft halogenarme, thermoplastisch verarbeitbare Polyurethanelastomere (TPU), die durch eine spezielle 4-Stoff-Additiv-Mischung eine unerwartet gunstige Kombination in den elektrischen Oberflacheneigenschaften, im Flammschutzverhalten und in der Abriebfestigkeit erhalten und ihre Verwendung zum Verspritzen, Extrudieren, Kaladrieren und Folienblasen. The invention relates to low-halogen, thermoplastically processable polyurethane elastomers (TPU) obtained by a specific 4-fuel-additive mixture an unexpectedly favorable combination in the electrical surface properties in flame retardancy and in resistance to abrasion and their use for spraying, extruding, Kaladrieren and film blowing , Erfindungsgegenstand ist auch ein Verfahren zur Herstellung der Elastomere, dadurch gekennzeichnet, das man den thermoplastischen Polyurethanelastomeren Subject invention also provides a process for the preparation of elastomers, characterized in that the thermoplastic polyurethane elastomers A) 2,5 bis 24 Gew.-% (vorzugsweise 5 bis 10 Gew.-%) einer Kombination aus mindestens 4 Additiv-Komponenten in Mengenanteilen von A) from 2.5 to 24 wt .-% (preferably 5 to 10 wt .-%) of a combination of at least 4 additive components in quantitative proportions of B) 1 bis 10 Gew.-% an Antimontrioxid, B) 1 to 10 wt .-% of antimony trioxide, C) 0,3 bis 4 Gew.-% an chlorierten und/oder bromierten aromatischen Verbindungen mit einem Halogengehalt von 50 bis 88 Gew.-%, C) from 0.3 to 4 wt .-% of chlorinated and / or brominated aromatic compounds with a halogen content of 50 to 88 wt .-%, D) 1 bis 8 Gew.-% Aluminiumhydroxid in einer Kornung von 0,1 bis 100 µ (vorzugsweise 1 bis 40 µ), D) 1 to 8 wt .-% of aluminum hydroxide with a grain size of 0.1 to 100 μ (preferably 1 to 40 μ), E) 0.2 bis 4 Gew.-% an Phosphorsauretris-ester und gegebenenfalls E) 0.2 to 4 wt .-% of Phosphorsauretris-ester, and optionally F) bis zu 5 Gew.-% an quartaren Tetraalkylammoniumsalzen F) up to 5 wt .-% of quaternary tetraalkylammonium salts vor, wahrend oder nach der polyurethanbildenden Reaktion einverleibt und/oder in Form eines Konzentrats dem thermoplastischen Polyurethan zumischt. before, during or incorporated and / or after the polyurethane-forming reaction are admixed in form of a concentrate to the thermoplastic polyurethane.

Thermoplastic polyurethane resin

Abstract: PURPOSE: To provide a thermoplastic polyurethane resin having improved pigment dispersibility, moist heat resistance, etc. without lowering the excellent properties of the base resin, by compounding a thermoplastic polyurethane resin having a specific group in the molecular chain with a low-molecular polyisocyanate. CONSTITUTION: The objective thermoplastic polyurethane resin is prepared by mixing 100pts.wt. of a thermoplastic polyurethane resin having -SO 3 X group (X is alkali metal) and a tertiary hydroxyl group in the molecular chain with 3W40pts.wt. of a low-molecular polyisocyanate (e.g. 4,4'-diphenylmethane diisocyanate) having two or more isocyanate groups, and curing the mixture. The thermoplastic polyurethane resin used as a raw material can be prepared by polymerizing an organic diisocyanate, a diol having -SO 3 X group in the molecular chain, and a mixture of said diol and a polyol having ≥2 OH groups, containing tertiary hydroxyl group and free of -SO 3 X group in the molecular chain. COPYRIGHT: (C)1984,JPO&Japio

Thermoplastic Polyurethane Elastomers: Chemistry Properties and Processing for the 80's':

Abstract: were considerably different from the wide range of thermoplastic polyurethanes available today. By the end of the 1940’s, polyurethane research programs existed at rubber and chemical companies in the United States, Great Britan and Germany as well as the polymer institutes of the U.S.S.R. Commercialization in the United States began in the late fifties when Mobay introduced Texin° and B. F. Goodrich, Estane° . The number of products and producers continued to increase into the late seventies. However, over the last three years a reduction in the number of producers has occurred, both as a result of increased competition from other thermoplastic elastomers and increased costs of raw materials based on petrochemicals. New processing technology for thermosets such as reaction injection molding (RIM), liquid injection molding (LIM), together with the growing acceptance of powdered rubber for injection molding add to the competetive pressures. These competetive pressures together with the premium prices TPU’s command, require changes in polyurethane technology to maintain their market share. These changes require improved physical properties, better processibility and reduced raw material costs.

Thermoplastic polyurethane elastomer composition

Abstract: PURPOSE: To provide a compsn. having excellent low-temperature characteristics, flexural fatigue characteristics, etc., by adding a specified thermoplastic polyurethane elastomer to a thermoplastic polyurethane elastomer obtd. by using an arom. polyisocyanate. CONSTITUTION: The titled compsn. consists of 70W99pts.wt. thermoplastic polyurethane elastomer (A) obtd. by using an arom. polyisocyanate, such as one having JIS hardness 65A or above and a number-average MW of 500 or above produced from a diol compd. a glycol and an arom. diisocynate, and 30W1pt.wt. thermoplastic polyurethane elastomer (B) obtd. by using an aliph. polyisocyanate, such as one having JIS hardness 95A or below and a number-average MW of 500 or above produced from a diol compd., a stright-chain low-molecular glycol and an aliph. polyisocyanate. Physical properties at low and ordinary temp., flexural fatigue characteristics, etc. are improved. COPYRIGHT: (C)1983,JPO&Japio

Softened resin composition

Abstract: PURPOSE:A composition having extremely improved releasability, workability in molding, and surface gloss, obtained by blending a thermoplastic polyurethane elastomer with a specific amount of AES resin. CONSTITUTION:10-80wt% resin obtained by graft copolymerization of an ethylene-propylene type rubber withan aromatic vinyl type monomer and a vinyl cyanide type monomer is blended with 90-20wt% thermoplastic polyurethane elastomer. The ethylene-porpylene type rubber having a weight ratio of ethylene to prolylene 90:10-20:80 and the mixture of the monomers having a weight ratio of styrene to acrylonitrile 80:20-60:40 in a weight ratio of the rubber to the mixture preferably 10:90-70:30 are subjected to copolymerization.

Process for embossing polymeric substrates by using a composite structure of an aromatic polyamide fabric coated with a fluorosilicone rubber

Abstract: A process for embossing flexible polymeric substrates in a dielectric heating press having a platen and a design fixture by placing an insulating blanket of a composite sheet structure between the substrate being embossed and the platen of the press and embossing the substrate; wherein the composite sheet structure is an aromatic polyamide fabric coated on both sides with a 2-30 mil thick layer of a fluorosilicone rubber and having a dielectric constant of about 4-8 and a dissipation factor of about 0.015-0.030; the polymeric substrates generally are laminates of thermoplastic polyurethane form/short napped synthetic velour fabric used as upholstery for automobiles and trucks.

Soft thermoplastic resin for surface protection coating of optical fiber cable

Abstract: PURPOSE:To prepare the titled resin having flexibility even in the absence of plasticizer, and excellent flame retardance, etc., by polymerizing a vinyl chloride monomer in an aqueous medium in the presence of a thermoplastic polyurethane elastomer soluble in the vinyl chloride monomer. CONSTITUTION:The objective resin is prepared by polymerizing (A) a vinyl chloride monomer (heareinafter referred to as MVC) or a mixture of a monomer (e.g. ethylene) copolymerizable with MVC and giving a homopolymer having a glass transition temperature of <=30 deg.C, in the presence of (B) 10-200pts.wt. (based on 100pts.wt. of A) of a thermoplastic polyurethane elastomer soluble in MVC and having a softening point of 20-100 deg.C (preferably a non-yellowing type elastomer prepared from an aliphatic diisocyanate) in (C) an aqueous medium preferably at 40-60 deg.C. EFFECT:It has excellent heat resistance, freeze resistance, and weather resistance.

Novel thermoplastic polyurethane resin

Abstract: PURPOSE:The titled polyurethane resin excellent in fluidity, tackiness, etc., comprising an organic diisocyanate component and a polyol component comprising a specified polyol having a tert. hydroxyl group. CONSTITUTION:The titled polyurethane resin is formed by reacting a polyol component comprising the following components A, B and C in a mol ratio, C/(A+B+C)=0.05-1, with the following component D at a ratio of 0.8-1.3/ 0.5-1.2: (A) terminal hydroxyl group-containing linear polyester-polyol, MW500- 6,000, and/or polyether-polyol (e.g., polyethylene glycol), (B) 2-10C diol (e.g., bisphenol A), (C) polyol (derivative) having at least one tert. hydroxyl group, 3-6 hydroxyl groups and 4-10 carbon atoms (e.g., 1,2,3-trihydroxy-2-methylpropane) and (D) organic diisocyanate (e.g., hexamethylene diisocyanate).

Carrier for electrostatic image developer

Abstract: PURPOSE:To reduce the bonding force generating between addition agent for developer and carrier, and perform a homogenous image formation by coating on a core material of a carrier with a composition composed mainly of butadiene (BD) acrylonitrile (AN) copolymer and polyurethane. CONSTITUTION:Core material consisted of glass or iron, or the like, of 30- 1,000mu particle size is coated with a solution mixing a solution of BD-AN copolymer having about 20-40wt% AN constituent by a polar solvent (methyl ethyl ketone, etc.) with a solution of thermoplastic polyurethane elastomer, then carrier is obtained. This carrier makes electric charge generated by the friction of fine powder of addition agent such as zinc stearate, or the like, which is added into developer to improve its flowability and its lubricating properties, on the carrier into almost zero, then bonding force generating between said addition agent and the carrier is reduced, thereby, by this carrier, the copied images of a constant quality are always obtained through supplying toner and the addition agent in a constant rate. Further, the coating film of the carrier is tough and hard to come away from the carrier, thereby its durability is improved.

Process for dyeing a polyurethane sheet

Abstract: A double sealed onto a glass support comprises an internal thickness made of thermoplastic polyurethane and an external thickness made of heat-curable polyurethane, which is dyed by a dyeing operation followed by a fixing operation. The procedure is a partial immersion of the polyurethane in the dye bath for a fraction of a second, then a first stage of emergence of short duration at a relatively high speed and a second terminal stage of emergence of longer duration and at lower speed. Application to the ophthalmic spectacle or sunglasses trade.