Polyurethane adhesive compositions containing dicyclopentenyloxyalkyl (meth) acrylate
AssigneeRohm and Haas Company
InventorsVincent J. Moser, Robert A. Slowik
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Abstract
This invention is concerned with spreadable fluid adhesive compositions, curable by conventional vinyl free radical polymerization or by exposure to a source of radiation, comprising a urethane prepolymer, at least one of dicyclopentyloxyalkyl acrylate and methacrylate, a polyol, and an effective amount of catalysts for curing of the urethane prepolymer and of the acrylate or methacrylate component. The invention is also concerned with a process for producing laminates of solid materials wherein the solid materials are adhered together by the adhesive composition.
Claims11
A spreadable laminating adhesive composition comprising, as its essential components,
- (a) from about 30% to about 50% by weight of a urethane prepolymer derived from the reaction of a member selected from the group consisting of a hydroxyl-terminated polyether and a hydroxyl-terminated polyester with an organic polyisocyanate, the urethane prepolymer having a free --NCO content of from about 2% to 8% by weight thereof,
- (b) from about 70% to about 50% by weight of at least one member selected from the group consisting of dicyclopentenyloxyalkyl acrylate and dicyclopentenyloxyalkyl methacrylate represented by the formula ##STR3## wherein R is selected from the group consisting of H and CH.sub.3, and R.sup.o is selected from the group consisting of (i) a C.sub.2 -C.sub.8 divalent alkylene group and (ii) a C.sub.2 -C.sub.8 divalent oxyalkylene group,
- (c) from about 1% to about 3% by weight, based on the total amount of components (a) and (b), of at least one polyol,
- (d) a small but effective amount of a catalyst for the condensation reaction of the urethane prepolymer of (a) with the polyol of (c), and
- (e) a small but effective amount of a catalyst for the polymerization of component (b).
Dependencies are inferred from the claim text.