Polymeric urea-urethane rheology control agent and...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 18/72 (2006.01) C08G 18/10 (2006.01) C08G 18/32 (2006.01) C08G 18/62 (2006.01) C08G 18/69 (2006.01) C08J 5/00 (2006.01) C08J 7/04 (2006.01) C09D 5/04 (2006.01) C09D 5/34 (2006.01) C09D 11/02 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2439786

The invention relates to a polymeric urea-urethane obtainable by first reacting a diisocyanate with a polyol to form a doubly NCO-terminated urethane prepolymer. Further reaction is subsequently carried out with a mixture of a primary monoamine and a primary diamine. After the second reaction the polymeric urea-urethane present is substantially free of isocyanate and of the monoamine and diamine used. It can be used as an agent for controlling the rheology of liquid polymers or polymer solutions.

L'invention concerne un polymère urée-uréthane obtenu en tout d'abord faisant réagir tout d'abord un diisocyanate avec un polyol pour former un prépolymère d'uréthane double à terminaison NCO. Une autre réaction est ensuite réalisée avec un mélange d'une monoamine primaire et d'une diamine primaire. Après la deuxième réaction, le polymère urée-uréthane présent est pratiquement exempt d'isocyanate et de la monoamine et diamine utilisées. Il peut être utilisé comme agent de contrôle de la rhéologie de polymères liquides ou de solutions de polymères.

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