Low friction, abrasion resistant coating for transparent film

Claim 1

A transparent, imaged motion picture film having on at least one face thereof a mottle free abrasion resistance coating of from 0.5 to 15.0μ on at least one face of said film, said coating resulting from the cure of a composition comprising at least 30% by weight of an epoxy-terminated silane, said coating: (1) having a coefficient of friction against tin-plated steel of from 0.05 to 0.30, as measured by ANSI PH 1.47-1972, (2) having a dynamic coefficient of friction against said coating of less than 0.41, and (3) allowing at least 75% transmission of all radiation between 400 and 780 nm which is transmitted by said imaged film without said coating, wherein said epoxy-terminated silane is represented by the formula: ##STR19## wherein R 2 and R 3 are independently alkylene groups of 1 to 4 carbon atoms, and R 4 is alkyl of 1 to 4 carbon atoms, and wherein said coating contains from 0.05 to 15.0% by weight of the coating of an oligomeric or polymeric material having at least 5% by weight of said material comprised of siloxane units of the formula: ##STR20## wherein R 5 and R 6 are independently selected from alkyl groups of 1 to 4 carbon atoms and phenyl groups having no more than 10 carbon atoms, and p is a positive whole integer of at least 1.