Substituted aliphatic polyamide porous membranes
US4668706A · kind A · utility
1Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1986 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Jul 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Aliphatic thermoplastic polyamide porous membranes are reacted with an acid halide of basicity above one to provide acid radicals within the membrane. The acid halide may be derived from an aromatic carboxylic acid or an aromatic derivative of a chlorosilane. The substituted aliphatic polyamide porous membrane lend themselves to the preparation of chemical derivatives of the membrane which are not readily available by aqueous synthesis and to increased density of derivatives which otherwise may be prepared by water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.