| 摘要 |
A polyisocyanate composition comprising a mixture of from about 10 percent to about 90 percent by weight of toluene diisocyanate and the balance a mixture of polyphenyl-polymethylene-polyisocyanates which latter are preferably the refined condensation product of aniline and formaldehyde. These polyisocyanate compositions are eminently suitable as isocyanate precursors for the production of high rise, thin section cellular polyurethane moldings. |
