Synthetic thermoplastic moulding materials
AssigneeTBA Industrial Products Limited
InventorsKenneth J. Taylor, Allan Lord
Life of this patent
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Abstract
A thermoplastic moulding material comprising (a) a synthetic thermoplastic polymer having a backbone comprising at least 50% of carbon atoms and selected from polypropylene, polyethylene, polystyrene, styrene/acrylonitrile copolymers, polyester, polyamides, ABS copolymers and acetal copolymers (b) from 0.05 to 10 percent by weight, based on the total weight of material, of polyimide pre-polymer (c) a reinforcing agent selected from glass fiber and mica.
Claims25
A thermoplastic moulding material consisting essentialy of:
- (a) from 35 to 95 percent by weight, based on the total weight of the material, of a synthetic thermoplastic polymer having a backbone comprising at least 50% of carbon atoms and selected from the group consisting of polypropylene, polyethylene, polystyrene, styrene/acrylonitrile copolymers, ABS copolymers and mixtures thereof;
- (b) from 0.05 to 10 percent by weight, based on the total weight of material, of a polyimide prepolymer which is the reaction product consisting of a polyamine and a bis-imide of an unsaturated carboxylic acid;
- and
- (c) reinforcing agent present in a total amount within the range of from 5 to 55 percent by weight, based on the total weight of material, said reinforcing agent comprising glass fiber or mica as an essential ingredient, which essential ingredient is present in an amount up to about 37.9% based upon the total weight of the material.
A moulding material according to claim 25 in which the polyimide prepolymer comprises the reaction product of a primary diamine containing not more than 30 carbon atoms and an N,N.sup.1 bis-imide of the formula ##STR6## in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radial containing at least two carbon atoms.
A high modulus thermoplastic moulding material consisting essentially of:
- (a) from about 59.6 to about 89.5 percent by weight, based on the total weight of the material, of a synthetic thermoplastic polymer having a backbone of at least 50 percent of carbon atoms and selected from the group consisting of polypropylene, polyethylene, polystyrene, copolymers of styrene and acrylonitrile and mixtures thereof,
- (b) from about 0.2 to about 7.5 percent by weight, based on the total weight of material, of the reaction product consisting of a primary diamine of the formula:
- ##STR9## and an N,N.sup.1 bis-imide of the formula:
- ##STR10## wherein D is a divalent radical containing a carbon-carbon double bond, and A is a divalent radical containing at least two carbon atoms and
- (c) from about 9.5 to about 37.9 percent by weight, based on the total weight of the material, of a reinforcing agent selected from the group consisting of glass fiber and mica.
A thermoplastic moulding material consisting essentially of:
- (a) from about 59.6 to about 89.5 percent by weight, based on the total weight of the material, of a synthetic thermoplastic polymer having a backbone comprising at least 50% of carbon atoms and selected from the group consisting of polypropylene, polyethylene, polystyrene, styrene/acrylonitrile copolymers, ABS copolymers and mixtures thereof,
- (b) from about 0.2 to about 7.5 percent by weight, based on the total weight of material, of a polyimide prepolymer which is the reaction product consisting of a polyamine and a bis-imide of an unsaturated carboxylic acid and
- (c) from about 9.5 to about 37.9 percent by weight, based on the total weight of material, of a reinforcing agent selected from the group consisting of glass fiber and mica.
Dependencies are inferred from the claim text.