Polyisocyanates and resin compositions thereof

C - Chemistry – Metallurgy – 08 – G

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402/131, 117/195

C08G 18/79 (2006.01) B05D 7/26 (2006.01) C07C 273/18 (2006.01) C08G 18/78 (2006.01) C07C 275/62 (2006.01)

Patent

CA 1267152

Abstract of the Disclosure A polyisocyanate having a biuret structure obtained by allowing .alpha.,.alpha.,.alpha.',.alpha.'-tetramethyl-xylylene diisocyanate, a diisocyanate represented by the general formula: OCN-CH2 ? R ? CH2-NCO wherein R is a divalent hydrocarbon residue and water to react. The polyisocyanate is used in the form of the two- part type of polyurethane composition in combination with a polyol. The composition can provide coating films which excel in every physical properties required for the coating film, such as drying property, impact resistance, weather- ing resistance and chemical resistance, and therefore are advantageously used, for example, as a paint for auto- mobile repairing uses, etc.

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