Importance

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Abstract

A mixture is provided comprising (a) at least one of an elastomeric thermoplastic, a non-elastomeric thermoplastic, an elastomeric thermoset and mixtures thereof, excluding polydiorganosiloxane fluids and (b) a polymer having soft polydiorganosiloxane units, hard polyisocyanate residue units, optionally, soft and/or hard organic polyamine residue units and terminal groups. The hard polyisocyanate residue and the hard polyamine residue comprise less than 50% by weight of the polydiorganosiloxane urea containing component. The polyisocyanate residue is the polyisocyanate minus the --NCO groups and the polyamine residue is the polyamine minus the --NH.sub.2 groups. The polyisocyanate residue is connected to the polyamine residue by urea linkages. The terminal groups are non-functional groups or functional groups. The polydiorganosiloxane urea containing component may be reactive under free-radical or moisture curing conditions. The mixture may also optionally contain tackifying materials, free radical initiators, crosslinking agents, cure catalysts, and nonreactive additives such as fillers, pigments, stabilizers, antioxidants, flame retardants, plasticizers, compatibilizers and the like.

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First Claim