Microencapsulated photochromic material, process for its preparation and a water-base ink composition prepared therefrom
US5017225A · kind A · utility
85Cited by
5References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 27, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Jul 27, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2984
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a microencapsulated photochromic material and a process for its preparation. More particularly, it relates to a microencapsulated photochromic material having a good durability and a process for its preparation. The present invention further relates to a water-base ink composition comprising said microencapsulated photochromic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.