Polydiorganosiloxane oligourea segmented copolymers and a pr ocess for making same

摘要

The present invention provides polydiorganosiloxane oligourea segmented copolymers. The copolymers contain soft polydiorganoxiloxane units, hard segments that are diisocyanate residues, the polydiorganoxiloxane units and diisocyanate residues being connected by urea linkages, and terminal groups that are non-reactive, reactive under free radical or moisture cure conditions, or amines. The invention also provides methods of preparing the copolymers.