Fluorinated polyamide-diazo resin coating composition

Claim 2

The composition of claim 1 wherein said diazo resin and said polyamide resin are present in proportions sufficient to provide a dried coating comprising about 60 percent to about 70 percent by weight diazo resin and about 30 percent to about 40 percent by weight polyamide resin.

Claim 3

The composition of claim 1 wherein sAid polyamide resin is a copolymer of caprolactam and the hexamethylene diamine salts of adipic and sebacic acid.

Claim 4

The composition of claim 1 wherein said polyamide resin is a copolymer of caprolactam and the hexamethylene diamine salts of adipic and sebacic acid and said diazo resin is a salt of the condensation product of paraformaldehyde and p-diazodiphenyl amine.

Claim 5

An article comprising a dimensionally stable substrate bearing a coating on at least one passivatably treated surface thereof comprising at least 50 percent by weight of a light-sensitive diazo resin and no more than about 50 percent by weight of a mutually soluble polyamide resin, with the proviso that said coating contain an effective amount, less than 1 percent by weight, of a soluble fluoroaliphatic radical containing polymer having a molecular weight of at least 2,000 and a fluorine content of between about 10 and about 50 percent by weight, said fluoroaliphatic radical being a fluorinated, saturated, monovalent, non-aromatic, aliphatic radical of at least 3 carbon atoms, and further having a terminal perfluoromethyl group, said polymer further containing a plurality of oxygen atoms in the form of carboxy oxygens (CO2-), ether oxygens (-O-), or hydroxy oxygens (-OH) or any combination thereof, and wherein said polymer is inert with respect to said diazo and polyamide resins.

Claim 6

The article of claim 6 wherein said substrate is a metal.

Claim 7

The article of claim 6 wherein said substrate is paper.

Claim 8

The article of claim 6 wherein said polyamide and said diazo resin are soluble in alcohol.

Claim 9

The article of claim 6 wherein said diazo resin is present to the extent of about 60 percent to about 70 percent of said coating and said polyamide resin is present to the extent of about 30 percent to about 40 percent by weight of said polyamide resin.

Claim 10

The article of claim 6 wherein said polyamide resin is a copolymer of caprolactam, and the hexamethylene diamine salts of adipic and sebacic acid and said diazo resin is a salt of the condensation product of paraformaldehyde and p-diazodiphenyl amine.

Claim 11

The article of claim 6 wherein said surface of said substrate is treated with a soluble silicate to passivate said surface with respect to said coating.

Claim 12

The article of claim 6 wherein said substrate is aluminum and said surface bears a treatment of a soluble silicate to passivate said surface with respect to said coating.

Claim 13

The article of claim 6 wherein said fluoroaliphatic radical containing polymer is present to the extent of less than 0.05 percent by weight of said coating.

Claim 14

The article of claim 6 wherein said fluoroaliphatic containing polymer is a copolymer of C8F17SO2N-(CH3)CH2CH2O2CCH CH2 and a polyoxyethylene glycol ester of methacrylic acid.

Claim 15

An organophilic composition in accordance with claim 1 wherein said fluoroaliphatic radical containing polymer is present to the extent of less than 0.05 percent by weight.