Patent GB-424125-A (GB)
Title: Process for preparing pigmented cellulose ester compositions and solutions
IPC: C09D101/08
Filed: 1933-07-01
Abstract: In the production of a pigmented cellulose ester solution or plastic, particularly of nitrocellulose, the ester, a swelling agent, an oxidized vegetable oil and a low boiling hydrocarbon are ground together, the hydrocarbon is then separated and, when a solution is desired, the residue is treated with a solvent for the ester. Varnishes and fillers such as wood flour, clay, infusorial earth, brick powder, &c. may also be incorporated.  In examples: (1) low viscosity nitrocellulose, titanium oxide, ethylacetate, blown castor oil, and low boiling petroleum naphtha are ground in a pebble mill, the naphtha strained off and the damp residue dissolved in a solvent; (2) varnish such as spar varnish, butylacetate, and the mixture of (1) are treated as in (1); (3) a plastic is produced by the process as in (1) but with an increased amount of pigment and optionally fillers.  Pigments include many specified inorganic pigments, carbon black and insoluble lakes of dyestuffs.  Specification 122,679, [Class 140], is referred to.ALSO:In the production of a pigmented cellulose ester solution or plastic, particularly of nitro-cellulose, the ester, a swelling agent, an oxidized vegetable oil and a low boiling hydrocarbon are ground together, the hydrocarbon is then separated and, when a solution is desired, the residue is treated with a solvent for the ester.  Varnishes and fillers such as wood flour, clay, infusorial earth, brick powder &c. may also be incorporated.  In examples (1) low viscosity nitrocellulose, titanium oxide, ethylacetate, blown castor oil and low boiling petroleum naphtha are ground in a pebble mill, the naphtha strained off and the damp residue dissolved in a solvent; (2) varnish such as spar varnish, butylacetate, and the mixture of (1) are treated as in (1); (3) a plastic is produced by the process as in (1) but with an increased amount of pigment and optionally fillers.  Pigments include many specified inorganic pigments, carbon black and insoluble lakes of dyestuffs.  Specification 122,679, [Class 140], is referred to.ALSO:In the production of a pigmented cellulose ester solution or plastic, particularly of nitrocellulose, the ester, a swelling agent, an oxidized vegetable oil and a low boiling hydrocarbon are ground together, the hydrocarbon is then separated and, when a solution is desired, the residue is treated with a solvent for the ester. Varnishes and fillers such as wood flour, clay, infusorial earth, brick powder, &c., may also be incorporated.  In examples: (1) low viscosity nitrocellulose, titanium oxide, ethylacetate, blown castor oil, and low boiling petroleum naphtha are ground in a pebble mill, the naphtha strained off and the damp residue dissolved in a solvent; (2) varnish such as spar varnish, butylacetate, and the mixture of (1) are treated as in (1); (3) a plastic is produced by the process as in (1), but with an increased amount of pigment and optionally fillers.  Pigments include many specified inorganic pigments, carbon black and insoluble lakes of dyestuffs.  Specification 122,679, [Class 70], is referred to.