Nonionic surface active oligomers as coating aids for the manufacture of photographic products
US6472139B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Feb 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/89
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hydrophobically capped oligomeric acrylamide or pyrrolidone is employed as a coating aid in coating compositions, especially such compositions useful in the manufacture of photographic products. Preferred coating aids are surfactants having the general formula in whichR, R1 and R2 are each independently selected from aliphatic hydrocarbyl, aryl-(aliphatic hydrocarbyl) and (aliphatic hydrocarbyl)-aryl groups, which groups may be unsubstituted, partially fluorinated or fully fluorinated,L is a sulphur atom or a linking group that contains a sulphur atom attached to the T group andT is a hydrophilic oligomeric group obtainable by the oligomerisation of one or more vinyl monomers having an amido function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.