Surfactants and hydrophilic colloid compositions and materials containing them
US5763150A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Surfactants useful as dispersing aids in the preparation of compositions comprising a hydrophilic colloid having hydrophobic particles dispersed therein have the structure ##STR1## wherein M is a cation; PA1 X represents a group having the structure ##STR2## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represents hydrogen or alkyl; or R.sup.1 and R.sup.2 taken together represent cycloalkyl; or R.sup.3 and R.sup.4 taken together represent cycloalkyl; and, PA1 n represents 0 or 1; provided that the total number of carbon atoms in each X group is 3 or 4, and when R.sup.1 is hydrogen R.sup.2 is other than methyl. Such surfactants offer coating and photographic property advantages when incorporated in multilayer photographic materials comprising a support bearing a plurality of hydrophilic colloid layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.