| 摘要 |
<p>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 twopart 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, weathering resistance and chemical resistance, and therefore are advantageously used, for example, as a paint for automobile repairing uses, etc.</p> |
