Patent ID: 8119214

Claim:
An encapsulated cure system for curable compositions comprising: a) an in-situ formed carrier material, b) a curative contained in said carrier material, and c) a polymer capsule encasing said carrier material; wherein the in-situ formed carrier material is a natural or synthetic material or composition that is substantially non-flowing in the absence of external forces, elevated temperatures or both and is formed by the action of a curative with or on a precursor composition for said carrier material following the addition of the curative (b) to said precursor composition wherein either (i) the curative for the in-situ formed carrier material is different from and in addition to the curative (b) contained in said carrier material or (ii) the curative for the in-situ polymerized carrier material is the same as the curative (b) and the amount of said curative is at least 1.6 weight percent prior to the in-situ polymerization of the carrier material and at least 0.1 weight percent following the in-situ polymerization of the carrier material: weight percent being based on the weight of the carrier material, said curative for the carrier precursor composition being soluble or miscible in said precursor composition.