Process for the preparation of polyurethane substances using specific stabilizer systems
US5077321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1991 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Jun 3, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of polyurethane substances in any desired form by reaction of PA0 a) polyisocyanates with PA0 b) compounds comprising at least two hydrogen atoms that are reactive towards isocyanates, in the presence of PA0 c) catalysts known per se and PA0 d) specific stabilizer systems, wherein there is used as component d) a stabilizer system comprising at least two compounds of at least two structurally different stabilizer types of formulae (1), (2), (3) and (4), in which formula (1) represents formulae (1a), (1b), (1c), (1d) or (1e) ##STR1## and the other formulae (2), (3) and (4) are as follows: ##STR2## wherein R.sub.1 each independently of the other is C.sub.1 -C.sub.4 alkyl, R.sub.2 and R.sub.5 each independently of the other are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.7 cycloalkyl, benzyl, phenyl or a group of the formula --CH.sub.2 COO--C.sub.6 -C.sub.18 alkyl, R.sub.3 is --H or --CH.sub.3, and R.sub.4 is C.sub.1 -C.sub.12 alkyl, R.sub.6 and R.sub.8 each independently of the other are C.sub.1 -C.sub.18 alkyl or C.sub.5 -C.sub.7 cycloalkyl, R.sub.7 each independently of the other is --H, C.sub.1 -C.sub.4 alkyl or C.sub.5 -C.sub.7 cycloalkyl, n is the number…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.