Thermosetting compositions containing hydroxyl-functional polymers prepared using atom transfer radical polymerization
US6517905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Sep 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermosetting composition that includes:(a) a crosslinking agent having at least two functional groups reactive with hydroxyl groups; and(b) a non-gelled, hydroxyl functional polymer prepared by atom transfer radical polymerization. The polymer contains at least one of the following polymer chain structures:—{(M)p—(G)q}x— or—{(G)q—(M)p}x—wherein M is a residue, that is free of hydroxyl functionality, of at least one monomer; G is a residue, that has hydroxyl functionality, of at least one monomer; p and q represent average numbers of residues occurring in a block of residues in each polymer chain structure; and p, q, and x are each independently selected for each structure such that the hydroxyl functional polymer has a number average molecular weight of at least 250. Also provided are methods of coating a substrate using compositions of the present invention and substrates coated by such methods, as well as color-plus-clear composite coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.