Vinyl ester copolymer in pressure sensitive adhesive

Vinyl ester copolymer, a vinyl-acrylic copolymer, a vinyl-acrylic copolymer, an atactic polypropylene, or a polyethylene terephthalate linear polymer. The viscosifier is a hydrogenated rosin-type rosin or ester, whose double bonds are completely or partially removed by hydrogenation, or a single – or double-mushroom – phenol copolymer. Us Patent No.4,585,819(Reischle et al.) discloses a molten adhesive consisting of a 20 — 90% by weight isocyanate prepolymer and a 5 — 50% by weight low molecular weight synthetic resin, selected from a ketone resin, Us Patent No.4,775,719(Markevka et al., ‘719) for hydrogenated products and condensation resins of acetophenone discloses a hot-melt thermosetting polyurethane adhesive composition that can be extruded as a hot-melt adhesive to form a hot-melt adhesive with high initial wet strength.

And can be wet-cured into a hard wet-cured polyurethane adhesive. The polyurethane adhesive composition comprises (a) a film-forming thermoplastic vinyl-vinyl monomer copolymer, which is a vinyl monomer of an acrylate monomer or a vinyl ester of a gazelle compound; (b) a liquid polyurethane prepolymer composition; (c) A phenol-free, aromatic or aliphatic-aromatic polymer tackifier consisting of a monomer selected from C+-6 diene, styrene monomer, vaccine monomer, and cyclodiene: and (d) an antioxidant.

Vinyl ester copolymer, a vinyl-acrylic copolymer, a vinyl-acrylic copolymer, an atactic polypropylene, or a polyethylene terephthalate linear polymer. The viscosifier is a hydrogenated rosin-type rosin or ester, whose double bonds are completely or partially removed by hydrogenation, or a single – or double-mushroom – phenol copolymer. Us Patent No.4,585,819(Reischle et al.) discloses a molten adhesive consisting of a 20 — 90% by weight isocyanate prepolymer and a 5 — 50% by weight low molecular weight synthetic resin, selected from a ketone resin, Us Patent No.4,775,719(Markevka et al., ‘719) for hydrogenated products and condensation resins of acetophenone discloses a hot-melt thermosetting polyurethane adhesive composition that can be extruded as a hot-melt adhesive to form a hot-melt adhesive with high initial wet strength.

And can be wet-cured into a hard wet-cured polyurethane adhesive. The polyurethane adhesive composition comprises (a) a film-forming thermoplastic vinyl-vinyl monomer copolymer, which is a vinyl monomer of an acrylate monomer or a vinyl ester of a gazelle compound; (b) a liquid polyurethane prepolymer composition; (c) A phenol-free, aromatic or aliphatic-aromatic polymer tackifier consisting of a monomer selected from C+-6 diene, styrene monomer, vaccine monomer, and cyclodiene: and (d) an antioxidant.