Polyurethane prepolymers having alkoxysilane and hydantoin...

Details Polyurethane prepolymers having alkoxysilane and hydantoin... Polyurethane prepolymers having alkoxysilane and hydantoin...

C - Chemistry, Metallurgy

08

G

C08G 18/83 (2006.01) C08G 18/10 (2006.01) C09K 3/10 (2006.01)

Patent

CA 2205106

The present invention relates to polyurethane prepolymers having alkoxysilane and hydantoin groups corresponding to formula (I) (see formula I) wherein A represents the residue obtained by removing the NCO groups from an isocyanate prepolymer having an NCO content of 0.4 to 5%, R represents a linear or branched alkyl group having 1 to 8 carbon atoms, X,Y and Z are the same or different and represent alkyl or alkoxy groups having 1-4 carbon atoms, provided that at least one of the groups is an alkoxy group and n has an average value of 1.5 to 4. The present invention also relates to a process for the preparation of the polyurethane prepolymers having alkoxysilane and hydantoin groups and to their use for the manufacture of sealants.

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