Method for preparing light-absorbing polymeric compositions
US6776930B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/109
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention recites a method comprising reacting in a solvent in the presence of a basea) at least one diacidic monomer comprising about 1 to 100 mole % of at least one light-absorbing monomer having a light absorption maximum between about 300 nm and about 1200 nm and 99-0 mole % of a non-light absorbing monomer which does not absorb significant light at wavelengths above 300 nm or has a light absorption maximum below 300 nm, withb) an organic compound of Formula IIX—B—X1 wherein B is a divalent organic radical to form a light absorbing composition comprising a mixture of a polymer having the formula  and a cyclic compound having the general formula  wherein B is as defined above; n is at least 2, m is 1, 2, 3 or 4 and A comprises the residue of a diacidic monomer comprising about 1 to 100 mole % of at least one light-absorbing monomer having a light absorption maximum between about 300 nm and about 1000 nm and wherein the remaining portion of A comprises the residue of a non-light absorbing monomer which does not absorb significant light at wavelengths above 300 nm or has a light absorption maximum below 300 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.