| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polyurethane foaming composition that delays reaction without reducing final reactivity, controls viscosity elevation immediately after mold injection, and can attain improvement in hardness and low pressurization for communicating cells. <P>SOLUTION: This polyurethane foaming composition includes polyisocyanate (A), an active hydrogen-containing compound (B) which contains polyol (B1) and water (B2), and a crosslinking agent composition (C). The crosslinking agent composition (C) includes a crosslinking agent (C1) which comprises alkanolamine (a) represented by formula: H<SB>x</SB>R<SP>1</SP><SB>y</SB>N((R<SP>2</SP>O)<SB>n</SB>H)<SB>3-x-y</SB>and aminosilane (b) represented by formula: (R<SP>3</SP>O)<SB>q</SB>R<SP>4</SP><SB>3-q</SB>Si-R<SP>5</SP>-(NHCH<SB>2</SB>CH<SB>2</SB>)<SB>p</SB>NR<SP>6</SP>R<SP>7</SP>, and a carboxylic acid (C2). The content of the crosslinking agent composition (C) is 0.1-20 pts.mass on the basis of 100 pts.mass of the active hydrogen-containing compound (B), and the mol number content of the crosslinking agent (C1) is larger than that of the carboxylic acid (C2). <P>COPYRIGHT: (C)2011,JPO&INPIT |
