Isocyanate-cured polysulphide polymers

Details Isocyanate-cured polysulphide polymers Isocyanate-cured polysulphide polymers

C - Chemistry, Metallurgy

08

G

C08G 18/24 (2006.01) C08G 18/50 (2006.01) C08G 18/64 (2006.01) C08L 75/04 (2006.01) C09J 175/00 (2006.01)

Patent

CA 2061597

A polysulphide resin composition is cured by reacting a liquid polysulphide resin with an isocyanate curing agent in the presence of an organometallic or metal salt catalyst, preferably an organotin catalyst such as dibutyltin laurate (DBTL). The compositions have utility in thin films and coatings, and in the bonding, sealing and coating of polycarbonates. Aliphatic isocyan- ates are preferred for applications where clear coatings are required, the more reactive aromatic isocyanates being preferred for other applications.

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