Stabilized polyester compositions suitable for outdoor applications
US4525504A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1983 |
| Grant date | Jun 25, 1985 |
| Priority date | — |
| Expiry date | Oct 24, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are stabilized polyester compositions having significantly improved weatherability, said polyesters consisting of homopolyesters derived from a dicarboxylic acid component wherein at least a major portion of which is 1,4-cyclohexanedicarboxylic acid (or ester) having a trans isomer content of at least 65% and a glycol component wherein at least a major portion of which is 2,2,4,4-tetramethyl-1,3-cyclobutanediol and copolyesters thereof with modifying aliphatic glycols and/or aliphatic dicarboxylic acids, said polyesters being stabilized with the combination of at least one ultraviolet light stabilizing compound compatible with said polyester and at least one hindered amine light stabilizer having the formulae ##STR1## the groups shown as R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from various substituents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.