Copolymeric mordants and photographic products and processes utilizing same
US4322489A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Apr 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/142
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymeric mordant materials containing recurring units according to the following formula are disclosed: ##STR1## In such copolymers, each of R.sup.1, R.sup.2 and R.sup.3 can independently be alkyl; substituted alkyl; cycloalkyl; aryl; aralkyl; alkaryl; or at least two of R.sup.1, R.sup.2 and R.sup.3, together with the quaternary nitrogen atom to which they are bonded, can complete a saturated or unsaturated, substituted or unsubstituted nitrogen-containing heterocyclic ring; and X is an anion. The molar ratio of a:b can range from about 0.1:1 to about 10:1, e.g., about 0.3:1 to about 3:1. The copolymeric mordant materials can be utilized as image-receiving layers and in photographic products and processes of the diffusion transfer type. The mordants are especially adapted to the production of dye images free of objectionable haze, yellowing or related image defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.