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US 9,428,673 B2Granted
Adhesive composition and use thereof
AssigneeCelanese International Corporation
InventorsYi Han, Xiaodong Zhao, Bangfang He, Yifang Shi
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Abstract
The invention discloses an adhesive composition suitable for bonding wood, in particular hardwood. The adhesive composition comprises a vinyl acetate-ethylene copolymer-based emulsion, a vinyl alcohol polymer, and a polyisocyanate. The process for preparing the adhesive composition and use of the same are also disclosed.
Claims13
An adhesive composition for bonding wood, comprising:
- (a) 1 to 50% by weight of a vinyl acetate-ethylene copolymer-based emulsion, wherein the copolymer comprises, based on the total weight of the copolymer:
- (1) 70 to 95% by weight of a moiety derived from vinyl acetate monomer;
- (2) 5 to 30% by weight of a moiety derived from ethylene monomer;
- and
- (3) 0 to 5% by weight of a moiety derived from other ethylenically unsaturated monomers,
- wherein the copolymer-based emulsion is formed by emulsion polymerization of the monomers in the presence of 0 to 3% by weight of an at least partially water-soluble polymeric protective colloid and 1 to 5% by weight of a surfactant, both based on the total weight of the monomers, wherein a combination of a higher amount of surfactant and a lower amount of polymeric protective colloid is used;
- and
- (b) 15 to 1% by weight of a vinyl alcohol polymer which has a degree of alcoholysis of at least 87.5 mole %;
- (c) 25 to 5% by weight of a polyisocyanate;
- and
- (d) up to 40% by weight of one or more fillers, wherein the weight % of components (a)-(d) are all based on the total weight of the composition.
8 more elements
Dependencies are inferred from the claim text.