WO1994024220B1 - Ethylene based hot melt adhesives and modifiers for those hot melt adhesives - Google Patents

Abstract

Modifiers for ethylene copolymers for use in adhesives are provided, particularly modifiers for ethylene vinyl acetate-based adhesives which improve adhesive properties are provided. Blends comprising ethylene copolymers, modifiers and tackifiers and applications thereof are also provided for.

Claims

AMENDED CLAIMS [received by the International Bureau on 10 October 1994 (10.10.94); original claims 1 and 7 amended; remaining claims unchanged (3 pages)]

Claim 1. A composition comprising a bland of. (a) copolymer of ethylene and a polar monomer; (b) a tackifier;

(c) a modifier comprising a linear or branched chain aliphatic hydrocarbon having five to twenty carbon atoms and having one polar group attached along the aliphatic structure; and

wherein said composition excludes alkenyl succinic anhydride.

Claim 2. me composition of claim l therein the polar momomer is an acid, an alcohol or an eater, preferably an alkylmethacrylate, an alkylacrylate, an alkylmathacrylic acid, an alkylacryilo acid, or a vinyl acetate and wherein the polar monomer is present et 1 to 60 wt.%, based upon the weight of the ethylene polymer.

Claim 3. The composition of claim 1 or 2 wherein the tackifier is a polar or non-polar rosin, rosin ester, linear chain aliphatic, branched chain

aliphatic, cyclic aliphatic, or a mixture of linear, branched or cyclic aliphatics, terpene or mixtures thereof.

Claim 4. The composition of claim 1, a or 3 wherein the modifier is a straight or branched chain C₅-C₂₀ aliphatic Having one or more alcohol, acid, ester, amide, amine, ketone, aldehyde, ether or acetate groups or a mixture thereof attached to the aliphatic chain, preferably at the terminus.

Claim 5. The composition of claim 1 wherein the modifier is dodecanol, octadecanol, octanol, decanol, tridaoennl, heptanαio acid, nonanola acid, dodecanoic acid, octadeoanoic acid, tridacanoio acid, heptanoic acid, decanoic acid, heptyl acetate, octyl acetate, nαnyl acetate, decyl avetate, tridacyl acetate, or mixtures thereof and the copolynar is ethylene vinyl acetate.

Claim 6. the composition of claim 1 wherein the modifier is present at 1-15 wt.% and the tackifier is non-polar.

Claim 7. A method for improving adhesion of an adhesive comprising blending a copolymer of ethylene and a polar monomer with a tackifier and a modifier, said modifier being a C₅-C₂₀ straight chain or branched chain aliphatic hydrocarbon comprising one or more polar groups wherein said adhesive excludes alkenyl succinic anhydride.

Claim 8. The method of claim 7 wherein the modifier is a C₅-C₂₀ straight chain aliphatic alcohol, acid, ester, amide, amine, katone, ether, aldehyde or a mixture thereof, preferably having one alcohol, acid, estsr, amide, oxine, ketone, aldehyde or eutisr yjroup attached to the terminus of the aliphatic chain.

Claim 9. The method of claim 7 wherein the tackifier is non-polar and is preferably a rosin, roam ester, tall oil rosin, straight chain aliphatic, branched chain aliphatic, cyclic chain aliphatic a mixture of straight and branched chain aliphatics, a miacture of straight and cyclic aliphatica, a mixture of branched end cyclic aliphatics, or a mixture of straight, cyclic and branched aliphatics, a terpene or a mixture thereof.

Claim 10. The method of claim 7 wherein the polar monomer is an alkylnethacrylate, an alkylnethacrylic acid, vinyl acetate or acrylic acid and is present at .001 to about 60 wt.% based upon the weight of the copolymer.

Claim 11. A lasinate, hot melt adhesive, pressure seneitive adhesive, bookbinding, structural adhesive, an upholstery adhesive, wood adhesive, automotive adhesive, cement adhesive or asphalt adhesive comprising the composition of claim 1.

Claim 12. The composition of claim 1 coated onto metal, plastic, thermoplastic, rubber, polyolefin, glass, ceramic, mineral, rook, wood, paper, paint, cardboard, asphalt or cement.