Method for making solid, ungelled aminoplast crosslinkers
US7163748B2 · kind B2 · utility
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3References
12Claims
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Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Jan 16, 2007 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods for preparing crosslinking agents that are the ungelled reaction product of (a) at least one aminoplast resin and (b) at least one modifying compound, wherein the crosslinking agents are essentially free of active hydrogen functional groups and have a glass transition temperature of at least 10° C. are disclosed. The methods include, inter alia, the use of vacuum and/or increased rates of inert gas introduction during reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.