发明授权
US4390644A Isocyanurate foams using a sulfonium zwitterion/metal carbonylate mixture as catalyst 失效
异硫氰酸酯泡沫使用锍两性离子/金属羰基化物混合物作为催化剂

Isocyanurate foams using a sulfonium zwitterion/metal carbonylate
mixture as catalyst
摘要:
Stable isocyanurate foams are produced at rapid reaction rates by contacting an organic polyisocyanate with an active hydrogen compound such as a polyether polyol in the presence of an initiator comprising an ortho-sulfonium phenoxide and a carbonylate salt such as sodium acetate.
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