Radiation curable pressure sensitive adhesive
AssigneePolychrome Corporation
InventorWilliam Rowe
Life of this patent
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Abstract
A pressure sensitive adhesive formed by exposure of a mixture comprising (I) a liquid, substantially water-insoluble monomeric composition, containing zero percent free isocyanate groups, which comprises the reaction product of (i) one equivalent of an isocyanate containing intermediate which is, itself, the reaction product of about one equivalent of an organic, monomeric compound containing more than one active hydrogen with two equivalents of an organic polyisocyanate, and (ii) one equivalent of a monomeric olefinically unsaturated compound containing exactly one active group; (II) a tackifier and (III) a polymerization inhibitor to a source of ultraviolet or electron beam radiation whereby the composition is rendered tacky.
Claims14
A composition comprising the admixture of:
- I. a substantially water insoluble, monomeric composition which comprises the reaction product of,
- A. one equivalent of an isocyanate containing intermediate which is the reaction product of,
- (i) about one equivalent of an organic, monomeric compound which contains more than one active hydrogen with,
- (ii) two equivalents of an organic polyisocyanate and, B. one equivalent of a monomeric olefinically unsaturated compound containing exactly one active hydrogen;
- said composition being a monomeric, solvent free liquid containing zero percent free isocyanate groups;
- and an effective amount of
- II. a tackifier;
- and
- III. a polymerization inhibitor;
- and
- IV. an optional photoinitiator;
- and
- V. an optional mono-unsaturated diluent;
- and
- VI. an optional polyunsaturated diluent;
- and
- VII. an optional plasticizer.
Dependencies are inferred from the claim text.