| 摘要 |
<p>In a process for the production of cellular products comprising thermoplastic or rubber materials the blowing agents employed have formula (I), wherein A represents NHX, NRR' or OR, X represents H or a lower alkyl group, R represents a lower alkyl group, and R' represents a lower alkyl group. The novel blowing agents provide high gas yields and have high decomposition temperatures while forming only inert nitrogen gas. They are particularly suitable for the production of cellular products from high temperature thermoplastic materials such as polycarbonates.</p> |
