Curable composition with rubber-like properties
AssigneeDesigner Molecules, Inc.
InventorsFarhad G Mizori, Stephen M Dershem
Life of this patent
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Abstract
Low viscosity, radiation curable compositions have been developed that produce plastics with silicone rubber-like properties. These compositions have also been shown to give great adhesion to plastics. The combination of an ethylenically unsaturated oligomer with di- or polythiol compound, reactive diluents and a radical initiator will produce these properties. These materials can find use in many areas such as: Electronics packaging, displays, conformal coatings, seals, gaskets, fiber optics coatings, and golf ball coatings.
Claims20
A curable adhesive composition comprising:
- (a) at least one functionalized polyurethane;
- (b) at least one thiol functionalized compound;
- (c) at least one reactive diluent;
- and
- (d) at least one free-radical initiator,
- wherein the functionalized polyurethane is selected from the group consisting of
- wherein each m and n is an integer having the value between 1 and 4.
A curable adhesive composition comprising:
- (a) at least one functionalized polyurethane;
- (b) at least one thiol functionalized compound;
- (c) at least one reactive diluent;
- and
- (d) at least one free-radical initiator,
- wherein functionalized polyurethane has the structure according to formula II
- (M*)2Tri*diol*Tri(*M)2 II
- wherein:
- each Tri is independently a triradical residue of a triisocyanate;
- diol is a diradical residue of a diol;
- each (*) indicates a linkage selected from the group consisting of —NH—CO—NH—, —COO— and —O—CO—NH—;
- n is an integer indicating the number of blocks of the polymer;
- and
- each M is an independently polymerizable ethylenically unsaturated radical of the structure E-(R)-(Q)-, wherein:
- each of R and Q is independently selected from the group consisting of a substituted or an unsubstituted aliphatic, aryl and heteroaryl;
- and
- E is independently selected from the group consisting of an acrylate, a methacrylate, maleimide, a styrenic, a vinyl ester, an olefin, allyl, vinyl ether, itaconate and fumarate.
Dependencies are inferred from the claim text.