The present invention relates to a heat-sealable structure comprising an aluminum foil and a heat-seal lacquer, said structure exhibiting a seal strength, according to ASTM F2824, of more than 23 N/15 mm when heat-sealed to another heat-sealable structure comprising an aluminum foil and the same heat-seal lacquer, the heat-seal lacquers of both structures contacting each other for heat sealing, said seal lacquer comprising a copolymer blend comprising: from 30 to 80% by weight, preferably 40 to 70% by weight, more preferably from 50 to 60% by weight of a copolymer A based on (meth)acrylate ester (co)polymers, olefin (co)polymers and block or grafted copolymers comprising (met)acrylate ester sequences and olefin sequences, from 20 to 70% by weight, preferably 30 to 60% by weight, more preferably from 40 to 50% by weight of a copolymer (B) based on vinyl halides, vinyl esters of carboxylic acids and ethylenically unsaturated (poly)carboxylic acids.

The present invention relates to a thermally crosslinkable composition comprising an acid-modified polymer A having a melting point of 110 to 150 C. and a crystallization temperature of 50 to 90 C., an acid-modified polymer B having a melting point of 30 to 110 C. and a crystallization temperature of lower than 50 C., a tackifier resin, and a curing agent, wherein the thermally crosslinkable composition has a crystallization temperature of 30 to 70 C.

The present invention relates to a heat-sealable structure comprising an aluminum foil and a heat-seal lacquer, said structure exhibiting a seal strength, according to ASTM F2824, of more than 23 N/15 mm when heat-sealed to another heat-sealable structure comprising an aluminum foil and the same heat-seal lacquer, the heat-seal lacquers of both structures contacting each other for heat sealing, said seal lacquer comprising a copolymer blend comprising: from 30 to 80% by weight, preferably 40 to 70% by weight, more preferably from 50 to 60% by weight of a copolymer A based on (meth)acrylate ester (co)polymers, olefin (co)polymers and block or grafted copolymers comprising (met)acrylate ester sequences and olefin sequences, from 20 to 70% by weight, preferably 30 to 60% by weight, more preferably from 40 to 50% by weight of a copolymer (B) based on vinyl halides, vinyl esters of carboxylic acids and ethylenically unsaturated (poly)carboxylic acids.

A composite sheet material includes a cover sheet, a substrate and an adhesion promoting layer. The cover sheet has a cover sheet material. The substrate has a substrate material. The adhesion promoting layer is disposed between the cover sheet and the substrate. A first side of the adhesion promoting layer disposed towards the cover sheet has an affinity to bond with the cover sheet material. A second side of the adhesion promoting layer disposed towards the substrate has an affinity to bond with the substrate material.

A composite sheet material includes a cover sheet, a substrate and an adhesion promoting layer. The cover sheet has a cover sheet material. The substrate has a substrate material. The adhesion promoting layer is disposed between the cover sheet and the substrate. A first side of the adhesion promoting layer disposed towards the cover sheet has an affinity to bond with the cover sheet material. A second side of the adhesion promoting layer disposed towards the substrate has an affinity to bond with the substrate material.

The present invention relates to a curable petroleum resin, a preparation method therefor, and use thereof, wherein the curable petroleum resin comprises a repeating unit derived from a petroleum resin monomer, a repeating unit derived from a silane monomer and a repeating unit derived from a cyclic anhydride monomer, and wherein the curable petroleum resin is used as an additive for a reactive polyolefin-based adhesive composition to increase the adhesive strength to a polyolefin-based substrate used for various parts.

The present invention relates to a curable petroleum resin, a preparation method therefor, and use thereof, wherein the curable petroleum resin comprises a repeating unit derived from a petroleum resin monomer, a repeating unit derived from a silane monomer and a repeating unit derived from a cyclic anhydride monomer, and wherein the curable petroleum resin is used as an additive for a reactive polyolefin-based adhesive composition to increase the adhesive strength to a polyolefin-based substrate used for various parts.

An article includes a substrate and a top-coat having a first side disposed on and in direct contact with the substrate and a second side that is outermost and exposed to the environment. The top-coat includes a first polymer chosen from acrylic polymers, acrylonitrile butadiene, butyl rubber, cellulose acetate, cellulose butyrate, epoxy resins, ethylene-vinyl acetate copolymers, modified ethylene-vinylacetate, vinyl acetate copolymers, ethylene-(meth)acrylic acid ionomers, vinylidene chloride copolymers, ethylene-(meth)acrylate copolymers, polyesters, natural rubber, neoprene, phenolic polymers, polyurethanes, polyvinyl acetate, polyvinyl alcohol, styrene butadiene rubber, casein, dextrin, starch, polysaccharides, copolymers of two or more thereof and combinations of two or more thereof; and combinations of any two or more thereof, a second polymer different than the first polymer and chosen from ethylene-acrylic acid copolymers, oxidized polyethylenes, ethylene-vinyl acetate copolymers, oxidized ethylene-vinyl acetate copolymers, maleated polyolefins, homopolymers of polyethylene, homopolymers of polypropylene, and combinations of any two or more thereof, and water.

Hot melt adhesive including a polar group-containing olefin copolymer has: number average molecular weight (M.sub.n) between 10 to 50 kg/mol, crystallinity (X.sub.c) content below 30%, enthalpy (?H) between 5 to 65 J/g, polydispersity index (PDI) from 2 to 6, melting temperature (T.sub.m) between 40 and 120? C., and including at least 80 mol % of a constituent unit of formula (1), optionally a constituent unit of formula (2), and between 0.1 to 1 mol %, of a constituent unit of formula (3):

##STR00001## wherein R.sup.1 is H or CH.sub.3; R.sup.2 is a hydrocarbyl group having 0 to 10 carbon atoms; R.sup.3 is a hydrocarbyl group having 2 to 10 carbon atoms, when X is hydroxyl functionality or a hydrocarbyl group having 0 to 10 carbon atoms, when X is polar organic group containing at least one carboxylic acid functionality and 0 to 6 carbon atoms.

A composite sheet material includes a cover sheet, a substrate and an adhesion promoting layer. The cover sheet has a cover sheet material. The substrate has a substrate material. The adhesion promoting layer is disposed between the cover sheet and the substrate. A first side of the adhesion promoting layer disposed towards the cover sheet has an affinity to bond with the cover sheet material. A second side of the adhesion promoting layer disposed towards the substrate has an affinity to bond with the substrate material.