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1.发明授权Rigid polyurethane foams prepared by using as the active hydrogen component a mixture of (a) the transesterification product of pentaerythritol with castor oil and (b) polyester polytols 失效通过使用（a）季戊四醇与蓖麻油的酯交换反应产物和（b）聚酯聚酯的混合物作为活性氢组分来制备刚性聚氨酯泡沫体
公开(公告)号：US3356621A
公开(公告)日：1967-12-05
申请号：US33363263
申请日：1963-12-26
Applicant: GEN LATEX AND CHEMICAL CORP
Inventor： HOPKINS JR HENRY SHELDON , GORDON PHILIP L
IPC: C08G18/66
CPC classification number: C08G18/6662 , C08G2101/0025
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