Abstract Compositions for coating onto polymeric surfaces such as photographic film supports to reduce static include alkali metal salts of alkylphosphoric acid esters, arylphosphoric acid esters or aralkylphosphoric acid esters. The alkyl chains of the phosphoric acid esters contain from about eight to 22 carbon atoms and the alkali metal has an atomic weight of at least 23, the preferred alkali metals being potassium, rubidium and cesium. The salts are applied to the polymeric surfaces from aqueous or organic solvent solutions which may contain a binder such as a polyvinyl acetal, cellulose esters and ethers, etc. The phosphoric acid salts have distinctive properties as antistatic agents compared to lower alkyl phosphate salts such as alkali metal amylphosphates; for example, they impart good static protection at low humidity and do not transfer to adjacent film surfaces so to interfere with coating of photographic emulsions thereon. They also function as film lubricants.
A polymeric photographic support according to claim 1 wherein the antistatic layer also contains a polymeric binder.
Claim 2
Dependent Claim
16 words
A polymeric photographic support according to claim 1 wherein the antistatic layer also contains a wax.
Claim 3
Dependent Claim
28 words
The product according to claim 1 wherein the support is a linear polyester, polyolefin, polycarbonate, polystyrene, vinyl polymer or copolymer support, or a paper coated with said polymers.
Claim 4
Dependent Claim
20 words
The product according to claim 4 wherein both the antistatic agent and a wax are present in the antistatic layer.
Claim 5
Dependent Claim
21 words
The product according to claim 4 wherein both the antistatic agent and a polymeric binder are present in the antistatic layer.
Claim 6
Dependent Claim
17 words
The product according to claim 1 wherein the support is a cellulose organic acid ester film support.
Claim 7
Dependent Claim
15 words
The product according to claim 1, wherein the support is a synthetic polyester film support.
Claim 8
Dependent Claim
16 words
The product according to claim 1, wherein the support is a paper coated with a polyolefin.
Claim 9
Dependent Claim
23 words
The product according to claim 1 wherein the alkyl group of the alkylphosphoric acid ester contains 12, 14, 16 or 18 carbon atoms.