Process for producing porous, film-like or fibrous structure of aromatic polyester
US4419308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1983 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Mar 28, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing a porous, film-like or fibrous structure of an aromatic polyester, which comprises PA1 (1) forming a substantially non-oriented film-like or fibrous structure by melt-molding an aromatic polyester blend composed of PA2 (A) an aromatic polyester containing an aromatic dicarboxylic acid as a main acid component and an aliphatic diol and/or an alicyclic diol as a main glycol component, and PA2 (B) at least one low-molecular-weight compound selected from the group consisting of imide compounds and isocyanurate compounds being compatible, but substantially non-reactive, with the aromatic polyester and having a molecular weight of not more than 1,000, PA1 the amount of the low-molecular-weight compound being present in an amount of 10 to 300 parts by weight per 100 parts by weight of the aromatic polyester, and PA1 (2) extracting at least a major part of the low-molecular-weight compound from the resulting substantially non-oriented film-like or fibrous structure with an organic solvent which can dissolve the low-molecular-weight compound but under the extracting conditions does not substantially dissolve the aromatic polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.