Foamable copolyesters prepared from divalent metal containing co-ionomers
US5922782A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Jul 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is are high molecular weight copolyester compositions which possess high melt viscosity and melt strength which render them foamable with a wide range of foaming agents. The copolyesters consist essentially of (A) diacid residues comprising (i) from about 99.9 to about 95 mol % of residues of an aromatic dicarboxylic acid having 8 to 12 carbon atoms and (ii) from about 0.1 to about 5.0 mol % of residues of an aromatic dicarboxylic acid sulfonate monomer containing at least one divalent metal sulfonate group attached to an aromatic nucleus, and (B) diol residues comprising residues of at least one aliphatic or cycloaliphatic diol having 2 to 8 carbon atoms, the mol % being based on 100 mol % dicarboxylic acid residues and 100 mol % diol residues.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.