Patent GB-496660-A (GB)
Title: Pigment pastes and pigmented lacquers
IPC: C09B67/46
Filed: 1937-06-03
Abstract: Pastes of a high pigment content suitable for incorporation in lacquers containing cellulose derivatives or artificial resins, are obtained by grinding the pigments with esters of di-basic acids with alcohols of high boiling point, e.g. 140-200 DEG  C., obtained by the hydrogenation of carbon monoxide, e.g. normal and branched hexyl alcohols, heptyl alcohols and alcohols of higher molecular weight. Suitable dicarboxylic acids are phthalic acid, diglycollic acid, oxalic acid, malonic acid, succinic acid, adipic acid, methyl-adipic acid, maleic acid and dien-condensation products thereof, prepared, e.g. according to Specification 300,130, [Class 1 (i)], fumoric acid, malic acid, tartaric acid, dilactic acid, tetrahydrophthalic acid, and tetrachlorophthalic acid.  According to examples: (1) calcined iron sulphate is ground with the phthalic acid ester of the alcohols boiling between 140-165 DEG  C., and the paste mixed with a solution of collodion cotton and the resin-like condensation product of collophony and glycerine in butyl acetate, butanol and toluene.  A lacquer is obtained.  (2) A similar lacquer is obtained from a paste of titanium white, zinc white and the above phthalic acid ester incorporated with collodion cotton, phthalic acid fatty acid-glycerine ester resin, butyl acetate, butanol and toluene. (3) By grinding zinc white and titanium white with the above phthalic acid ester, a paste suitable for making white artificial leather is obtained, and permits reduction of the castor oil content of the composition.  (4) A white lacquer is obtained by mixing a paste of titanium white and the above phthalic acid ester with a solution of polyvinyl acetate in toluene.ALSO:Pastes of a high pigment content suitable for incorporation in lacquers containing cellulose derivatives or artificial resins are obtained by grinding the pigments with esters of dibasic acids with alcohols of high boiling point, e.g. 140-200 DEG  C., obtained by the hydrogenation of carbon monoxide, e.g. normal and branched hexyl alcohols, heptyl alcohols and alcohols of higher molecular weight.  Suitable dicarboxylic acids are phthalic acid, diglycollic acid, oxalic acid, malonic acid, succinic acid, adipic acid, methyladipic acid, maleic acid and dien-condensation products thereof, prepared, e.g. according to Specification 300,130, [Class 2 (iii)], fumaric acid, malic acid, tartaric acid, dilactic acid, tetrahydrophthalic acid, and tetrachlorophthalic acid.  According to examples: (1) calcined iron sulphate is ground with the phthalic acid ester of the alcohols boiling between 140-165 DEG  C., and the paste mixed with a solution of collodion cotton and the resin-like condensation product of colophony and glycerine in butyl acetate, butanol and toluene.  A lacquer is obtained.  (2) A similar lacquer is obtained from a past of titanium white, zinc white and the above phthalic acid ester incorporated with collodion cotton, phthalic acid fatty acid-glycerine ester resin, butyl acetate, butanol and toluene.  (3) By grinding zinc white and titanium white with the above phthalic acid ester a paste suitable for making white artificial leather is obtained, and permits reduction of the castor oil content of the composition.  (4) A white lacquer is obtained by mixing a paste of titanium white and the above phthalic acid ester with a solution of polyvinyl acetate in toluene.