Block copolymer, method of making the same, diamine...

Details Block copolymer, method of making the same, diamine... Block copolymer, method of making the same, diamine...

C - Chemistry, Metallurgy

08

G

C08G 77/26 (2006.01) C08G 18/61 (2006.01) C08G 77/08 (2006.01) C08G 77/458 (2006.01)

Patent

CA 2166321

Block copolymers having a repeating unit comprised of polysiloxane and urea segments are prepared by copolymerising certain diaminopolysiloxanes with diisocyanates. The invention also provides novel diaminopolysiloxanes useful as precursors in the preparation of the block copolymers and methods of making such diaminopolysiloxanes. Pressure sensitive adhesive compositions comprising the block copolymer are also provided as are sheet materials coated with the same.

Copolymères séquencés présentant une unité répétitive composée de segments de polysiloxane et d'urée préparés par copolymérisation de certains diaminopolysiloxanes avec des diisocyanates. L'invention porte aussi sur de nouveaux diaminopolysiloxanes servant de précurseurs dans la préparation de copolymères séquencés et leur méthode d'obtention. L'invention porte également sur des adhésifs de contact à base desdits polymères et des matériaux en feuilles en étant revêtus.

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