Process for crosslinking hydrophilic colloids using vinyl substituted, SO.sub.2 containing, amine salt
US4001201A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1973 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Feb 16, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/43
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for crosslinking hydrophilic colloids which contain amino-, imino- and/or hydroxyl groups. Compounds of the formula ##EQU1## are used as crosslinking agents. In the formula V and W denote hydrogen atoms or organic radicals, X and Y represent vinyl groups or substituted vinyl groups or groups which can be converted into vinyl groups, Z represents an organic bridge member and m is an integer from one to 11. The compounds used as cross-linking agents, except those of the above formula wherein X and Y represent groups which can be converted into vinyl groups, are new and form part of the invention; also forming another aspect of the invention are photographic materials containing celloids cross-linked as per the above process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.