Thermosetting compositions containing epoxy functional polymers prepared by atom transfer radical polymerization
US6268433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Aug 16, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermosetting composition useful as a powder coating comprises a co-reactable solid, particulate mixture of (a) an epoxy functional polymer containing at least one of the polymer chain structures -[(M).sub.p -(G).sub.q ].sub.x - or -[(G).sub.q -(M).sub.p ].sub.x - wherein M is an oxirane-free residue of at least one ethylenically unsaturated monomer, G is a glycidyl-functional ethylenically unsaturated monomer, p and q each independently has a value of 0 to typically less than 100, and x has a value of at least 1 to typically less than 100, the total value of p, q and x selected such that said epoxy functional polymer has a number average molecular weight of at least 250, and (b) a co-reactant having functional groups reactive with the epoxy groups of (a), e.g., dodecanedioic acid. The epoxy functional polymer is prepared by atom transfer radical polymerization and a polydispersity index of less than 2.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.