Method for aqueous polyurethane blocking reaction
US5789518A · kind A · utility
1Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | May 16, 1996 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | May 16, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/4862
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method of reaction of water PU resins for improving the blocking reactions of beta-dicarbynal compounds and polisocynantes, and reducing the reaction time for water PU blocking, wherein the construction is: ##STR1## wherein: R.sub.1,R.sub.2,R.sub.3,R.sub.4 =hydrogen or alkyl group n.sub.1 =1.about.100 n.sub.2, n.sub.3, n.sub.4 =1.about.10 The blocking agents of beta-Dicarbonyl compounds are reduced by D.sub.1 and D.sub.2 which are used in the blocking reactions of water PU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.