Polyester urethane-containing molding compositions
First Claim
1. A homogeneous solution of a vinylidene monomer and an acrylated polyester urethane resin useful in preparing injection and compression molding compositions by the reaction therewith of polyisocyanates to form polyurethane containing vinyl copolymers which comprises an ethylenically unsaturated monomer solution having dissolved therein:
- (A) 30-70% by weight of a resin selected from a vinyl ester urethane having the following general formula;
space="preserve" listing-type="equation">c-i-(d-n).sub.t d-i-c wherein d is a radical derived from an organic polyol;
n is a radical derived from an unsaturated aliphatic dicarboxylic acid or an anhydride thereof;
i is a radical derived from polyisocyanate;
c is a carbamyl-linked radical derived from a hydroxy-terminated ester of acrylic or methacrylic acids;
t is an integer equal to from 1 to about 5, and(B) 1.5-30% by weight of at least one organic polyol free of ethylenic unsaturation having 2-6 hydroxyl groups per molecule and which is the essential polyurethane precursor reactive with said polyisocyanate to form polyurethane.
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Accused Products
Abstract
Polyester urethane derivatives having the following general formula:
c-i-(d-n).sub.t d-i-c
wherein d is a radical derived from an organic polyol; n is a radical derived from an unsaturated aliphatic dicarboxylic acid or an anhydride thereof; i is a radical derived from a polyisocyanate; c is a carbamyl-linked radical derived from a hydroxy-terminated ester of acrylic or methacrylic acid; t is an integer equal to from 1 to about 5; in ethylenically unsaturated monomer solutions are thickened to moldable non-sticky gels by the formation in said solution of minor amounts of branch chain polyurethane resin mixtures free of ethylenic unsaturation. The physical properties of reinforced molded articles made from these molding compositions show dramatic improvement in impact strength and flexibility.
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Citations
21 Claims
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1. A homogeneous solution of a vinylidene monomer and an acrylated polyester urethane resin useful in preparing injection and compression molding compositions by the reaction therewith of polyisocyanates to form polyurethane containing vinyl copolymers which comprises an ethylenically unsaturated monomer solution having dissolved therein:
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(A) 30-70% by weight of a resin selected from a vinyl ester urethane having the following general formula;
space="preserve" listing-type="equation">c-i-(d-n).sub.t d-i-cwherein d is a radical derived from an organic polyol;
n is a radical derived from an unsaturated aliphatic dicarboxylic acid or an anhydride thereof;
i is a radical derived from polyisocyanate;
c is a carbamyl-linked radical derived from a hydroxy-terminated ester of acrylic or methacrylic acids;
t is an integer equal to from 1 to about 5, and(B) 1.5-30% by weight of at least one organic polyol free of ethylenic unsaturation having 2-6 hydroxyl groups per molecule and which is the essential polyurethane precursor reactive with said polyisocyanate to form polyurethane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification