Process for the production of polyurethane foam from polyisocyanate and polyether polyol or polyester polyol in the presence of stannoxane catalyst
Abstract
Abstract AS CATALYST FOR THE REACTION OF AN ISOCYANATE WITH A COMPOUND HAVING ACTIVE HYDROGEN ATOMS, CERTAIN OCTAALKYL-STANNOXANES(I) E.G. OCTABUTYL-DICHLORO-DIHYDROXYSTANNOXANE, OCTABUTYL - DIACETOXY-DIHYDORXY-STANNOXANE, OCTABUTYL - TETRAACETOXY-STANNOXANE, OCTABUTYL-DIMETHOXYDIACETOXY - STANNOXANE, OCTABUTYL-TETRAISOCYANATE-STANNOXANE, OCTABUTYLTETRAISOTHOCYANATE-STANNOXANE, AND OTHERS NAMED IN THE SPECIFICATION INFRA, UNEXPECTEDLY HAVE A CATALYTIC ACTIVITY WHICH IS SEVERAL TENFOLD TIMES HIGHER THAN THAT OF THE COMPOUNDS (E.G. DIBUTYLTIN-DILAURATE, TIN(II)2-ETHYLHEXOATE, TRIETHYLENEDIAMINE, ETC.) WHICH HAVE HERETOFORE BEEN REGARDED AS HAVING THE HIGHEST CATALYST ACTIVITY FOR THE SAID REACTION. COMPOUNDS I CAN BE USED AS SOLE CATALYST FOR THE PRODUCTION OF POLYURETHANE FOAM, AND ARE MORE STABLE THAN HITHERTO-EMPLOYED CATALYSTS.
Inventors
- 👤 Makoto Yokoo
- 👤 Akizo Keshi
- 👤 Norishige Hashimoto
- 👤 Shigenobu Nakahara
Bibliographic Details
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