Diblock and triblock polydiorganosiloxane-polyurea block...

Details Diblock and triblock polydiorganosiloxane-polyurea block... Diblock and triblock polydiorganosiloxane-polyurea block...

C - Chemistry, Metallurgy

08

G

C08G 77/458 (2006.01) B32B 7/06 (2006.01) C08G 18/28 (2006.01) C08G 18/61 (2006.01) C08G 18/80 (2006.01) C09J 7/02 (2006.01) C08L 83/10 (2006.01)

Patent

CA 2214678

Diblock (B-A) and triblock (B-A-B) polydiorganosiloxane-polyurea block copolymers comprise non-functional polydiorganosiloxane endblock B and polyurea block A. When used to provide release coatings, the block copolymers allow for easier release compared to traditional block copolymers of the (AB)n type having comparable amounts of polydiorganosiloxane. Articles incorporating the copolymers as a release material are also disclosed.

Les polymères diblocs (B-A) ou triblocs (B-A-B) de polydiorganosiloxane-polyurée comportent un bloc terminal B de polydiorganosiloxane non fonctionnel et un bloc A de polyurée. Lorsqu'ils sont utilisés comme revêtements de décollage, les copolymères blocs permettent une libération plus facile par rapport aux copolymères blocs traditionnels de type (AB)¿n? ayant des quantités comparables de polydiorganosiloxane. L'invention décrit également des articles incorporant les copolymères en tant que matériau de libération.

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