Preparation of films and coatings of para ordered aromatic heterocyclic polymers
US4051108A · kind A · utility
26Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1975 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Dec 5, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31681
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Films and coatings are prepared from a dispersion of microscopic sheets of para ordered aromatic heterocyclic polymers by collecting the sheets from the dispersion either by filtration on a porous surface or by drawing a metal surface through the dispersion, and allowing the dispersion medium to evaporate. Upon drying the microscopic sheets coalesce to form the films or coatings. This procedure makes possible the fabrication of high quality, thermally stable films and coatings without the use of high temperature cures or other severe conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.