Compositions and processes for producing scratch resistant...

Details Compositions and processes for producing scratch resistant... Compositions and processes for producing scratch resistant...

C - Chemistry, Metallurgy

09

D

117/187, 400/720

C09D 183/08 (2006.01) C08L 83/08 (2006.01) C09D 183/06 (2006.01)

Patent

CA 1315450

ABSTRACT OF THE DISCLOSURE A prepolymer composition for forming a scratch resistant coating, comprising an acidic, aqueous solution of a polysiloxane prepolymer having non-coreactive side groups and co-reactive side groups other than hydrolysable groups, the composition being curable by evaporation of solvent and a decrease in acidity causing the co-reactive groups to react together to cross link the polymer. Suitable co-reactive side groups are amino, epoxy and thiol. Suitable non-coreactive side groups are alkyl and gamma methacryloxy propyl. Acidity is suitably achieved by using a volatilisable organic acid such as acetic acid, so that it evaporates with the solvents to decrease the acidity.

518494

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