Photographic coating solutions
OwnerJohn L. Cawse, David Rowlandinventors
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Abstract
Aqueous photographic coating solutions comprising a gelatino silver halide emulsion, a synthetic polymer latex and a compound of the general formula ##STR1## where E.sup.1 and E.sup.2 represent the end groups of the polymer chain, R is an alkyl group or phenyl, R.sup.1 is a polyether moiety, M is a monovalent cation or hydrogen and x is 3 to 200, the ratio of this compound to the synthetic polymer being from 0.1 to 50 of this compound to 100 of the synthetic polymer on a dry solids basis.
Claims7
An aqueous photographic coating solution which comprises an gelatino silver halide emulsion and a synthetic polymer latex and which is characterised in that it also comprises a compound of the general formula I:
- ##STR6## wherein E.sup.1 and E.sup.2 represent the end groups of the polymer chain, R is a linear or branched alkyl group chain comprising 6 to 20 carbon atoms or is a phenyl group, R' is a polyether moiety of the formula ##STR7## wherein R" is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or CH.sub.3 CO-- and n is 2 to 20, M is hydrogen or a monovalent cation, and x is 3 to 200, the ratio (by weight) of the compound of formula I to the synthetic polymer being from 0.1 to 50 of the compound of formula I to 100 of the synthetic polymer on a dry solids basis.
Dependencies are inferred from the claim text.