SOLID EXPANDABLE COMPOSITIONS
First Claim
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1. A solid expandable composition comprising:
- a) at least one anhydride-functionalized thermoplastic;
b) at least one amine-functionalized latent curing agent; and
c) at least one latent blowing agent.
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Abstract
Solid expandable compositions useful for the manufacture of cavity filler inserts and the like are obtained by combining at least one anhydride-functionalized thermoplastic, at least one amine-functionalized latent curing agent, and at least one latent blowing agent. Such compositions may be formulated so as to provide a highly expanded foam upon heating to activate the blowing agent wherein the foam is resistant to sagging and tolerant of over baking conditions.
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Citations
15 Claims
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1. A solid expandable composition comprising:
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a) at least one anhydride-functionalized thermoplastic; b) at least one amine-functionalized latent curing agent; and c) at least one latent blowing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15)
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13. A solid expandable composition comprising:
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a) from 35 to 80 weight percent of one or more anhydride-functionalized thermoplastics selected from the group consisting of copolymers of ethylene, maleic anhydride, and one or more comonomers selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and C1 to C6 alkyl esters of acrylic acid and methacrylic acid; b) from 0.1 to 5 weight percent of one or more amine-epoxy adducts having a melting point of from 105 to 150 degrees C.; and c) from 5 to 20 weight percent of one or more latent chemical blowing agents selected from the group consisting of azo compounds and hydrazide compounds.
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Specification