Rubber-modified dicarboxylic acid imide copolymers
AssigneeArco Polymers, Inc.
InventorAdolph V. DiGiulio
Life of this patent
Estimating the term…
Abstract
Rubber-modified copolymers comprising 5 to 40 weight percent of an elastomer and 95 to 60 weight percent of a copolymer containing 1 to 50 mole percent of an imide derivative of an ethylenically unsaturated dicarboxylic acid monomer and 99 to 50 mole percent of one or more monomers copolymerizable therewith are prepared by the reaction of aqueous ammonia or amines with an aqueous suspension of a rubber-modified copolymer of the copolymerizable monomers and an ethylenically unsaturated dicarboxylic acid, anhydride, or half acid derivative. The reaction is carried out at a temperature between 125.degree. and 200.degree. C. at autogenous pressure for between 0.5 and 48 hours. The imide products can be recovered in the form of discrete particles, such as beads or pellets, if desired.
Claims4
A process for preparing a rubber-modified copolymer comprising (a) 5 to 40 weight percent of an elastomer and (b) 95 to 60 weight percent of a copolymer containing from 1 to 50 mole percent of an imide derivative of an ethylenically unsaturated dicarboxylic acid and 99 to 50 mole percent of one or more monomers copolymerizable therewith, said process comprising:
- a. forming an aqueous suspension of (1) a rubbermodified copolymer comprising (a) 5 to 40 weight percent of an elastomer selected from the group consisting of homopolymers of conjugated 1,3-dienes, copolymers of said 1,3-dienes with up to 50 mole percent of one or more monoolefinically unsaturated monomers copolymerizable therewith, ethylenepropylene-diene terpolymer rubbers, acrylate-diene copolymer rubbers, and mixtures thereof, and (b) 95 to 60 weight percent of a copolymer in discrete particulate form containing 1 to 50 mole percent of a dicarboxylic moiety selected from the group consisting of an ethylenically unsaturated dicarboxylic acid, an ethylenically unsaturated dicarboxylic anhydride and an ethylenically unsaturated dicarboxylic acid half acid derivative, and mixtures thereof and 99-50 mole percent of one or more monomers copolymerizable therewith selected from the group consisting of a vinyl aryl monomer, an aliphatic alpha-monoolefin, an alkyl vinyl ether, a conjugated diolefin, an unsaturated nitrile, an acrylic monomer and mixtures thereof and (2) aqueous ammonia or an aqueous amine selected from the group consisting of alkyl amines having 1 to 4 carbon atoms in the alkyl group, allyl amine, ethanolamine, aniline, benzylamine, .alpha.,.omega.-alkylene diamines having 2 to 6 carbon atoms in the alkylene group, and arylene diamines in an amount sufficient to react stoichiometrically with the dicarboxylic moiety;
- b. heating said suspension with agitation in a closed system at a temperature of between 125.degree. and 200.degree. C. at autogenous pressure for 0.5 to 48 hours to allow reaction between the ammonia or amine and the dicarboxylic moiety;
- and
- c. separating the rubber-modified copolymer in discrete particulate form from the aqueous medium.
A process for preparing a rubber-modified copolymer comprising (a) 5 to 40 weight percent of an elastomer, and (b) 95 to 60 weight percent of a non-equimolar copolymer in discrete particulate form containing a major amount of vinyl aryl monomer and a minor amount of an imide derivative of an ethylenically unsaturated dicarboxylic acid monomer comprising:
- a. forming an aqueous suspension of (1) a rubber-modified copolymer comprising (a) 5 to 40 weight percent of an elastomer selected from the group consisting of homopolymers of 1,3-dienes, copolymers of said 1,3-dienes with up to 50 mole percent of one or more monoolefinically unsaturated monomers copolymerizable therewith, ethylene-propylene-diene terpolymer rubbers, acrylate-diene copolymer rubbers, and mixture thereof, and (b) 95 to 60 weight percent of a copolymer in discrete particulate form containing a major amount of said vinyl aryl monomer and a minor amount of a monomer selected from the group consisting of an ethylenically unsaturated dicarboxylic acid, an ethylenically unsaturated dicarboxylic anhydride, and an ethylenically unsaturated dicarboxylic acid half acid derivative and mixtures thereof and (2) aqueous ammonia or an aqueous amine selected from the group consisting of alkyl amines having 1 to 4 carbon atoms in the alkyl group, allyl amine, ethanolamine, aniline, benzylamine, .alpha.,.omega.-alkylenediamines having 2 to 6 carbon atoms in the alkylene group, and arylene diamines in an amount sufficient to react stoichiometrically with the dicarboxylic monomer;
- b. heating said suspension with agitation in a closed system at a temperature of between 125.degree. and 200.degree. C. at autogenous pressure for 0.5 to 48 hours;
- and
- c. separating the rubber-modified copolymer in discrete particulate form from the aqueous medium.
Dependencies are inferred from the claim text.