Thermoplastic polymeric material and method for the preparation thereof
AssigneeAsahi-Dow Limited
InventorsHideo Kasahara, Kichiya Tazaki, Kunio Fukuda, Hiroshi Suzuki
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Abstract
A thermoplastic polymeric material which is superior in mechanical strength comprises (1) 10 to 65% by weight of a hard copolymer containing as a comonomer an .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and (2) 90 to 35% by weight of a polyamide, which are chemically bonded to each other. The thermoplastic polymeric material has a fine dispersion microstructure. The material may be reinforced by incorporating glass or carbon fibers therein.
Claims21
A thermoplastic polymeric material predominantly comprising a novel copolymer, said novel copolymer being composed of polymer chain moieties A having a molecular weight of 30,000 to 300,000 derived from a hard styrene copolymer and polymer chain moieties B having a molecular weight of 10,000 to 50,000 derived from a polyamide, said polymer chain moieties A and B being chemically bonded to each other, said styrene copolymer including 2 to 30 mol% of .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and a styrene compound, said styrene copolymer being contained in a range of 10 to 65% by weight based on the weight of the said novel copolymer, said polyamide being contained in a range of 90 to 35% by weight based on the weight of the said novel copolymer and said polymeric material having a fine dispersion microstructure of not greater than 5.mu. in avarage particle diameter of the disperse phase.
A thermoplastic polymeric material predominantly comprising a novel copolymer, said novel copolymer being composed of polymer chain moieties A having a molecular weight of 30,000 to 300,000 derived from a hard unsaturated carboxylic acid ester copolymer and polymer chain moieties B having a molecular weight of 10,000 to 50,000 derived from a polyamide, said polymer chain moieties A and B being chemically bonded to each other, said unsaturated carboxylic acid ester copolymer including 2 to 30 mol% of .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and .alpha.,.beta.-unsaturated carboxylic acid ester, said unsaturated carboxylic acid ester copolymer being contained in a range of 10 to 65% by weight based on the weight of the said novel copolymer, said polyamide being contained in a range of 90 to 35% by weight based on the weight of the said novel copolymer and said polymeric material having a fine dispersion microstructure of not greater than 5.mu. in average particle diameter of the disperse phase.
A glass fiber-reinforced resin composition comprising 40 to 95% by weight of the thermoplastic polymeric material according to claim 1 or 6 and 5 to 60% by weight of glass fiber.
A carbon fiber-reinforced resin composition comprising 40 to 95% by weight of the thermoplastic polymeric material according to claim 1 or 6 and 5 to 60% by weight of carbon fiber.
A method for producing a thermoplastic polymeric material having a fine dispersion microstructure of not greater than 5.mu. in average particle diameter of the disperse phase, which comprises melt-kneading 10 to 65% by weight of a hard styrene copolymer having a molecular weight of 30,000 to 300,000 and 90 to 35% by weight of a polyamide having a molecular weight of 10,000 to 50,000 at a temperature of 260.degree. to 330.degree. C. and a shearing rate of not lower than 100 sec.sup.-1 under the absence of a radical generating catalyst, said styrene copolymer including 2 to 30 mol% of .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and a styrene compound.
A method for producing a thermoplastic polymeric material having a fine dispersion microstructure of not greater than 5.mu. in average particle diameter of the disperse phase, which comprises melt-kneading 10 to 65% by weight of a hard unsaturated carboxylic acid ester copolymer having a molecular weight of 30,000 to 300,000 and 90 to 35% by weight of a polyamide having a molecular weight of 10,000 to 50,000, said hard unsaturated carboxylic acid ester copolymer including 2 to 30 mol% of .alpha.,.beta.-unsaturated dicarboxylic acid anhydride and .alpha.,.beta.-unsaturated carboxylic acid ester.
Dependencies are inferred from the claim text.