Method for scavenging moisture in polyisocyanates and formulations thereof
US6291577A · kind A · utility
4Cited by
11References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Apr 11, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/0885
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Scavenging moisture from a polyisocyanate useful for preparing thermosetting polyurethane coatings therefrom is accomplished by admixing with the polyisocyanate a t-butylated hydroxytoluene and an alkyl ester of toluenesulfonic acid in which the alkyl ester comprises at least 90% para ester, thereby improving the shelf life of the polyisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.