Process for the production of SiO.sub.2 containing polybenzamides
US5006636A · kind A · utility
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2Claims
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Assignee
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Key dates
| Filing date | Jan 23, 1989 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2377/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for the production of poly-(1,4-benzamide) in admixture with SiO.sub.2 by polycondensation of 4-aminobenzoic acid in the presence of SiCl.sub.4 in 1,3-dimethyltetrahydro-2(1H)-pyrimidinone in the presence of salts, such as lithium chloride or calcium chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.