Claims
- 1. In a laminate structure comprising (1) at least one layer of an ethylene-vinyl alcohol copolymer, (2) at least one layer of a moisture-resistant resin composed of a polyolefin, a polyester or a polycarbonate, and (3) an adhesive layer interposed between the layer (1) and the layer (2), the improvement which comprises using as said adhesive layer a hot-melt composition comprising
- (A)(i) an acid-modified olefin resin formed by graft modification of a trunk polymer comprising at least one olefin resin selected from the group consisting of low density polyethylene, medium density polyethylene, high density polyethylene, isotactic polypropylene, a propylene-ethylene copolymer, a propylene-butene-1 copolymer, a propylene-ethylene-butene-1 copolymer, an ethylene-vinyl acetate copolymer and an ion-crosslinked olefin copolymer, with an ethylenically unsaturated carboxylic acid or its anhydride or (ii) a resin mixture of said acid-modified olefin resin with an olefin resin selected from group providing said trunk polymer for said acid-modified olefin resin and
- (B) an oxirane ring-containing compound selected from the group consisting of epoxidized glycerides, epoxidized fatty acid esters and epoxy hexahydrophthalic acid esters,
- said composition including said acid- or acid anhydride-modified olefin resin in an amount sufficient to provide a carbonyl group concentration of 1 to 600 millimoles per 100 g of the composition and an oxirane oxygen concentration of 0.01 to 50 millimoles per 100 g of the composition.
- 2. The laminate structure of claim 1 wherein the modified olefin resin is an olefin resin modified with acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, maleic anhydride, itaconic anhydride, citraconic anhydride or tetrahydrophthalic anhydride.
- 3. The laminate structure of claim 1 wherein the modified olefin resin is an olefin resin modified with maleic anhydride.
- 4. The laminate structure of claim 1 wherein the oxirane ring-containing compound is a member selected from the group consisting of epoxidized soybean oil, expoxidized castor oil, epoxidized linseed oil, epoxidized safflower oil, epoxidized linseed oil fatty acid butyl ester, epoxidized octyl oleate, epoxidized iso-octyl oleate, epoxidized 2-ethylhexyl oleate and epoxy hexahydrophthalic acid esters represented by the following formula: ##STR3## wherein R stands for a higher alkyl group such as a 2-ethylhexyl or isododecyl group.
- 5. The laminate structure of claim 1 wherein the carbonyl group concentration is 5 to 300 millimoles per 100 g of the composition and the oxirane oxygen concentration is 0.1 to 20 millimoles per 100 g of the composition.
- 6. The laminate structure of claim 1 wherein the adhesive layer comprises A(i) and (B).
- 7. The laminate structure of claim 1 wherein the adhesive layer comprises A(ii) and (B).
Priority Claims (1)
Number |
Date |
Country |
Kind |
58-21989 |
Feb 1983 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 507,915, filed June 27, 1983, now U.S. Pat. No. 4,585,985.
US Referenced Citations (2)
Divisions (1)
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Number |
Date |
Country |
Parent |
507915 |
Jun 1983 |
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