Condensation polymers and products therefrom
US4617373A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1986 |
| Grant date | Oct 14, 1986 |
| Priority date | — |
| Expiry date | Jan 28, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Molding or fiber grade condensation polymer having copolymerized therein a total of from 1.0 to about 5,000 ppm of at least one methine moiety having one or more methine units defined as "the group >C.dbd.C< conjoined with a conjugated aromatic system," said moiety absorbing in the range of from about 350 nm to about 650 nm, and being nonextractable from said polymer and stable under the polymer processing conditions. The moieties preferably have molecular weights of from about 200 to about 600 although lower and higher molecular weights are also operable and are derived from reactants (monomers) having one or more groups such as hydroxyl, carboxyl, carboxylic ester, acid halide, amino and the like which condense during condensation or polycondensation to enter the moiety into the polymer chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.