SILOXANE-POLYUREA BLOCK COPOLYMER

Block copolymers having a repeating unit comprised of polysiloxane and urea segments are prepared by copolymerizing certain diaminopolysiloxanes with diisocyanates. The invention also provides novel diaminopolysiloxanes useful as precursors in the preparation of the block copolymers and a method of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: CHARLES MARTIN LEIR, JEROME JOSEPH HOFFMAN
Format: Patent
Sprache:eng
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