Condensation copolymers containing methine ultraviolet radiation-absorbing residues and shaped articles produced therefrom
US4749772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Jul 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/91
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A composition useful for molding into articles such as food containers, soft drink bottles, cured structural plastics and the like, comprising molding or fiber grade linear or unsaturated polyester or polycarbonate having copolymerized therein a total of from 1.0 to about 5,000 ppm, of the residue of one or a mixture of methine reactants of the formula ##STR1## wherein A is an unsubstituted or substituted 2-furanyl, 2-thienyl or 3-thienyl radical; PA1 R.sup.1 is hydrogen or a unsubstituted or substituted alkyl, cycloalkyl or aryl radical; and PA1 R.sup.2 is hydrogen or an unsubstituted or substituted alkyl, alkenyl, cycloalkyl or aryl radical. The methine residues are present in the polymer as an integral part of the polymer chain and absorb ultraviolet radiation in the range of about 150 to about 390 nm. The residues are non-extractable from the polymer and stable at the conditions at which the polymers are manufactured and processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.