| 摘要 |
<p>1533114 Polyurethane foams BAYER AG 29 Oct 1975 [23 Jan 1975] 44594/75 Heading C3R Cold-setting polyurethane foams are prepared by reacting a polyether polyol with a polyisocyanate in the presence of water and/or an organic blowing agent and a mixture of silicon compounds corresponding to the formula: wherein R represents a C 1-3 alkyl group, R<SP>1</SP> represents a C 6-14 aryl group, R<SP>2</SP> represents a C 6-14 aryl group or a grouping of the formula: wherein R<SP>3</SP> represents a grouping of the Formula II (above), or a C 6-14 aryl group, x is from 1 to 20 with the proviso that at least one of the silicon compounds in the mixture has x greater than 3; and y is from 0 to 10, different values of y may occur in the molecule and the total number of silicon atoms does not exceed 60.</p> |
