Polyester composition and process for producing the same
US4668732A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 1986 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | May 16, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyester composition having an enhanced melt-spinnability and processability and useful for producing polyester fibers having excellent mechanical properties and whiteness, comprises (A) a polyester resin derived from esterification or interesterification and polycondensation of a diol component with an acid component which comprises a terephthalic acid, 0.1 to 20 molar % based on the amount of the terephthalic acid, of a naphthalene dicarboxylic acid compound and/or diphenyl dicarboxylic acid compound, and 0.01 to 20 molar % based on the amount of the terephthalic acid, of a p-hydroxybenzoic acid compound and/or benzoic acid compound and/or 0.005 to 0.15 molar % based on the amount of the terephthalic acid, of at least one member selected from alkali and alkaline earth metal salts of organic carboxylic acids; and (B) 0.01 to 3% based on the weight of the polyester resin (A), of titanium dioxide particles dispersed in the polyester resin (A), having an average size of 0.5 .mu.m or less and containing agglomerates having a size of 5 .mu.m or more in the number of 300 or less per 10 mg of the polyester resin (A).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.