Polyurethane and preparation containing polyurethane

Details Polyurethane and preparation containing polyurethane Polyurethane and preparation containing polyurethane

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) C08G 18/30 (2006.01) C08G 18/48 (2006.01) C09D 175/08 (2006.01) C09J 175/08 (2006.01)

Patent

CA 2325552

The invention relates to a polyurethane which can be produced by reacting at least two components A and B, where a) a polyisocyanate or a mixture of two or more polyisocyanates is used as component A and b) a polyol or a mixture of at least two or more polyols is used as component B. The invention is characterized in that component B contains a polyether having a molecular weight (M n) of at least 4,000 and c) a polydispersity PD (M w/M n) of less than 1.5, or d) an OH functionality of between approximately 1.8 and approximately 2.0, or e) a polydispersity PD (M w/M n) of less than 1.5 and an OH functionality of between approximately 1.8 and approximately 2.0, or a mixture of two or more such polyethers. The invention also relates to preparations containing such polyurethanes.

L'invention concerne un polyuréthane pouvant être produit par réaction d'au moins deux constituants A et B, dans laquelle a) un polyisocyanate ou un mélange d'au moins deux polyisocyanates est utilisé comme constituant A, et b) un polyol ou un mélange d'au moins deux polyols est utilisé comme constituant B. L'invention est caractérisée en ce que le constituant B contient un polyéther présentant un poids moléculaire (M¿n?) d'au moins 4000 et c) une polydispersité PD (M¿w?/M¿n?) inférieure à 1,5, ou d) une fonctionnalité OH comprise entre environ 1,8 et environ 2,0, ou bien e) une polydispersité PD (M¿w?/M¿n?) inférieure à 1,5 et une fonctionnalité OH comprise entre environ 1,8 et environ 2,0, ou encore un mélange d'au moins deux polyéthers. L'invention concerne également des préparations renfermant ces polyuréthanes.

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