| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a two-component polyurethane composition soluble with a low polarity organic solvent, the composition having low viscosity and exhibiting excellent initial curing property of a coating film. <P>SOLUTION: The polyisocyanate composition contains at least the following components (A), (B) and (C): (A) a polyisocyanate compound comprising at least one kind of diisocyanate selected from aliphatic diisocyanate and alicyclic diisocyanate, in which (a) the content of isocyanurate trimers ranges from 60 mass% to 95 mass%, (b) a molar ratio of allophanate groups derived from monoalcohols to isocyanurate groups is from 1/99 to 30/70, (c) the content of uretdione dimers ranges from 2 mass% to 25 mass%, and (d) multimers having a number-average molecular weight of not less than 1,000 are included in an amount not more than 10 wt.%; (B) a low polarity organic solvent having an aniline point of -6°C to 70°C; and (C) at least one kind of silicate compound selected from among specific tetraalkoxysilane and condensates and derivatives thereof. <P>COPYRIGHT: (C)2011,JPO&INPIT |
