Energy cured sealant composition
First Claim
Patent Images
1. A curable composition formed by mixing components comprising:
- a) 10 to 70 weight percent of a curable epoxy resin;
b) an effective amount of a curative for the epoxy resin;
c) 10 to 85 weight percent of a thermoplastic ethylene-vinyl acetate copolymer; and
d) 5 to 60 weight percent of a thermoplastic polyester compatibilizing resin,wherein the sum of a), c), and d) above equals 100 weight percent.
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Abstract
A curable composition formed by mixing components comprising 10 to 70 weight percent of a curable epoxy resin; an effective amount of a curative for the epoxy resin; 10 to 85 weight percent of a thermoplastic ethylene-vinyl acetate copolymer; and 5 to 60 weight percent of a thermoplastic polyester resin, the parts by weight being based on the total weight of the resin in the composition.
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Citations
26 Claims
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1. A curable composition formed by mixing components comprising:
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a) 10 to 70 weight percent of a curable epoxy resin; b) an effective amount of a curative for the epoxy resin; c) 10 to 85 weight percent of a thermoplastic ethylene-vinyl acetate copolymer; and d) 5 to 60 weight percent of a thermoplastic polyester compatibilizing resin, wherein the sum of a), c), and d) above equals 100 weight percent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 25)
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16. An article comprising:
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a) a curable composition in the form of a film formed by mixing components comprising; i) 10 to 70 weight percent of a curable epoxy resin, ii) an effective amount of a curative for the epoxy resin, iii) 10 to 85 weight percent of a thermoplastic ethylene-vinyl acetate copolymer, and iv) 5 to 60 weight percent of a thermoplastic polyester compatibilizing resin, wherein the sum of i), iii), and iv) above equals 100 weight percent; and b) a release liner or a backing attached to said film. - View Dependent Claims (17, 18, 19)
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20. A method comprising the steps of:
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a) providing a molten mixture including; i) 10 to 70 weight percent of a curable epoxy resin, ii) an effective amount of a curative for the epoxy resin, iii) 10 to 85 weight percent of a thermoplastic ethylene-vinyl acetate copolymer, and iv) 5 to 60 weight percent of a thermoplastic polyester compatibilizing resin, wherein the sum of i, iii, and iv equals 100 weight percent; b) applying the molten mixture to a substrate for processing into an unsupported film; and c) at any subsequent time, activating the curative to produce a cured composition. - View Dependent Claims (21, 22)
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23. A curable composition formed by mixing components comprising a molten mixture including:
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a) about 30 to about 50 weight percent of a curable epoxy resin; b) an effective amount of a thermal curing agent for the epoxy resin; c) about 30 to about 60 weight percent of a thermoplastic ethylene-vinyl acetate copolymer containing at least 40 percent vinyl acetate by weight of the copolymer; and d) about 10 to about 30 weight percent of a thermoplastic polyester compatibilizing resin, wherein the sum of a), c), and d) above equals 100 weight percent. - View Dependent Claims (24)
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26. A curable composition formed by mixing components comprising:
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(a) an effective amount of a curable epoxy resin; (b) an effective amount of a curative for the epoxy resin; (c) an effective amount of a thermoplastic ethylene-vinyl acetate copolymer; and (d) an effective amount of a thermoplastic polyester compatibilizing resin, wherein the composition his significant tack in the uncured state, good cured adhesion to surface treated metals, low controlled flow during curing, and semi-structural adhesive and cohesive strength in the cured state.
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Specification