Fast crystallizing polyester compositions
US4393178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Oct 23, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Fast crystallizing polyester compositions obtained by reacting a polyester which comprises aromatic or cycloaliphatic residues obtained from diacids and/or hydroxyacids and aliphatic, aromatic or cycloaliphatic residues of diols with an ionizable metal salt of an organic compound having at least one acidic proton using sufficient of the ionizable metal salt to result in at least 4% of the end groups of the polyester being converted to carboxylate end groups but insufficient to result in the melt degradation performance of the polyester determined as hereinafter described being substantially inferior to that of the polyester in the absence of the salt. Preferred compositions contain a polyester comprising at least 90 mole % of ethylene terephthalate units and metal salts of substituted benzoic acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.