Polyureas preparable from two polyetheramines and a prepolymer

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 18/66 (2006.01) C08G 18/10 (2006.01) C08G 18/50 (2006.01)

Patent

CA 2761093

The invention relates to a polyurea which can be produced from a) a component A comprising a1) 5 to 40% by weight of at least one polyetheramine 1 (PEA 1), which can be obtained from at least one polyether polyol 1 (PEP 1) and at least one amine 1, the PEP 1 having a weight equivalent of = 500, a2) 30 to 90% by weight of at least one polyetheramine 2 (PEA 2), which can be obtained from at least one polyether polyol (PEP 2) and at least one amine 2, the PEP 2 having a weight equivalent of > 500, a3) 5 to 30% by weight of at least one amine chain extender and b) one component B which is a prepolymer and can be obtained from b1) at least one polyether polyol (PEP 3) and b2) at least one isocyanate.

L'invention concerne une polyurée pouvant être produite à partir de a) un constituant A contenant a1) 5 à 40% en poids d'au moins une polyétheramine 1 (PEA 1) pouvant être obtenue à partir d'au moins un polyétherpolyol 1 (PEP 1) et d'au moins une amine 1, PEP 1 présentant un poids équivalent inférieur ou égal à 500, a2) 30 à 90% en poids d'au moins une polyétheramine 2 (PEA 2) pouvant être obtenue à partir d'au moins un polyétherpolyol 2 (PEP 2) et d'au moins une amine 2, PEP 2 présentant un poids équivalent supérieur à 500, et a3) 5 à 30% en poids d'au moins un allongeur de chaîne amine; et b) un constituant B qui est un prépolymère pouvant être obtenu à partir de b1) au moins un polyétherpolyol 3 (PEP 3) et b2) au moins un isocyanate.

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