Elastomeric polyurethane film containing dispersed discrete aggregates of liquid crystal and method of making the same
US4182700A · kind A · utility
22Cited by
1References
9Claims
0Family size
Inventors
Key dates
| Filing date | Jun 14, 1978 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | Jun 14, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Polyurethane elastomer films containing dispersed discrete aggregates of liquid crystals can be produced with improved color response. The liquid crystal aggregates are dispersed in uncured polyurethane elastomer precursors which are cured as a film. After the curing process has commenced but before the curing process has been completed, the partially cured film is subjected to shear stresses to change the shape of the partially cured material which thereafter is allowed to complete the cure in the altered shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.