Polyethylene terephthalate compositions having improved crystallization rate and surface appearance
US4391938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1982 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Feb 16, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/1515
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions comprising polyethylene terephthalate and an additive to promote crystallization rate and improve surface appearance selected from the group consisting of monomeric esters of citric acid and epoxidized esters of unsaturated aliphatic carboxylic acids. Compositions comprising polyethylene terephthalate, poly (C.sub.4 -C.sub.6) terephthalate, and a surface appearance and crystallization rate improving additive selected from the group consisting of monomeric esters of citric acid, organic esters of an aromatic carboxylic acid of 7 to 11 carbon atoms containing at least one carboxyl group per aromatic nucleus and an alcohol, oligomeric polyesters, and epoxidized esters of unsaturated aliphatic carboxylic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.