Carbodiimide crosslinking agent, process for preparing the same, and coating material comprising the same
US6124398A · kind A · utility
28Cited by
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9Claims
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Key dates
| Filing date | May 13, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | May 13, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/797
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A carbodiimide crosslinking agent comprises, as its main component, a decarbonated condensate of (A) one or more isocyanates selected from isocyanates having at least two isocyanate groups bonded to the carbon of the methylene group in the molecule, and (B) one or more isocyanates selected from alicyclic or aliphatic diisocyanates other than those defined in (A). The condensate is blocked at terminal isocyanates thereof with a hydrophilic group. A process for preparing the crosslinking agent, and a coating material comprising the agent are also described, along with a specific type of crosslinking agent for polyvinyl alcohols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.