Thermosetting compositions containing carbamate-functional polylmers prepared using atom transfer radical polymerization
US6306965A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Aug 16, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D201/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermosetting composition is provided comprising: PA1 (a) a crosslinking agent having at least two functional groups that are reactive with carbamates; and PA1 (b) a non-gelled, carbamate functional polymer prepared by atom transfer radical polymerization, in the presence of an initiator having at least one radically transferable group. The polymer contains at least one of the following polymer chain structures: EQU --{(M).sub.p --(G).sub.q }.sub.x -- or EQU --{(G).sub.q --(M).sub.p }.sub.x -- wherein M is a residue, that is free of carbamate functionality, of at least one ethylenically unsaturated radically polymerizable monomer; G is a residue, that has carbamate functionality, of at least one ethylenically unsaturated radically polymerizable 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 carbamate functional polymer has a number average molecular weight of at least 250. Also provided by the present invention are methods of coating a substrate using compositions of the present invention and substrates coated by such methods, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.