Silica bonded tin urethane catalysts

Details Silica bonded tin urethane catalysts Silica bonded tin urethane catalysts

1984-02-06

1985-03-26

Ivy, C. Warren

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

502242, 502152, 502170, 502171, 521111, 521122, 524874, 523216, 528 58, C08G 1824, C08K 336, B01J 2108, B01J 2314

Patent

active

045074100

ABSTRACT:
A solid catalyst composition comprising a silica or silica-treated compound and a tin catalyst compound bonded to the surface of the silica compound which is not deactivated in the presence of silica or silica-treated compounds. A process for preparing the solid catalyst by contacting a silica compound containing reactive hydroxyl groups with a tin catalyst compound at a temperature range from about 130.degree. to 165.degree. C. under dynamic conditions whereby the tin catalyst compound bonds to the silica compound. Generally, after the reaction, at least a portion of the hydroxyl groups present on the silica compound are absent and, more preferably, substantially all the isolated hydroxyl groups are absent. A urethane composition containing the solid catalyst is also provided wherein the solid catalyst is not deactivated by the addition of silica or silica-treated compounds.

REFERENCES:
patent: 3927052 (1975-12-01), Vizurraga
patent: 3935051 (1976-01-01), Bender
patent: 4045527 (1977-08-01), Babayan

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