Hydroxyl-containing organotin catalysts for making polyurethanes
US5089645A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1990 |
| Grant date | Feb 18, 1992 |
| Priority date | — |
| Expiry date | Dec 17, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2540/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Useful as catalysts for the reaction of a polyisocyanate or a partially blocked polyisocyanate with a hydroxyl-containing compound are hydroxyl-containing organotins such as, for example, compounds of formulas I-III ##STR1## where R is a C.sub.1 -C.sub.8 alkyl or an aryl group; PA1 R.sup.1 is a C.sub.2 -C.sub.22 divalent hydrocarbyl group which may contain a hydroxyl substituent; PA1 X is a linking group which may be --O--, --S-- or --O.sub.2 C--; PA1 Y is a hydroxyl-containing C.sub.3 -C.sub.5 alkylene group; PA1 Y' is a C.sub.1 -C.sub.9 divalent hydrocarbyl group; PA1 Z is divalent organic linking group; and PA1 n is 0 or 1. Suitable hydroxyl-containing organotin compounds would also include polymeric organotin compounds prepared by the reaction of a diorganotin oxide or diorganotin dichloride with HSCH.sub.2 CH(OH)CH.sub.2 XH, preferably in a 1:0.5-1 molar ratio, where X is --S-- or --O--.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.