Copolymers of hydroxymethylbenzoic acid and lactam
US4528361A · kind A · utility
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2References
7Claims
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Key dates
| Filing date | Dec 19, 1983 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Dec 19, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High molecular weight linear aromatic amorphous copolymers comprising copolymers of p- , m-hydroxymethylbenzoic acid and mixtures thereof and a polyamide are prepared in ratios of 1:20 to 20:1. The resulting polymers have an inherent viscosity of at least 0.4 dl/g in a 60/40 phenol/tetrachloroethane solvent at 30.degree. C., good molding properties and improved hydrophylic properties as compared with nylon-6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.