Patent GB-656549-A (GB)
Title: Improvements relating to aqueous emulsions of organic liquids, and products derived from such emulsions
IPC: C09D5/02
Filed: 1947-07-28
Abstract: A pigmented aqueous emulsion of an organic liquid is prepared by dispersing in water together with the said organic liquid a pigment, the surface of which has been modified by having been subjected to the action of an organic silicon compound having attached to the silicon atom at least one organic group as hereinafter defined and at least one group which will react with water or with a hydroxyl radicle to split off a product which does not contain silicon.  The term "organic group" means only a hydrocarbon, or substituted hydrocarbon, group attached to the silicon atom either directly or through an oxygen atom.  The organic silicon compound may be an organic silicon halide which may have the general formula RaSiX(4-a), where R is a short or long chain saturated or unsaturated organic group as hereinbefore defined, X is a halogen atom and a is 1, 2 or 3. Suitable organic silicon compounds are set forth in Specifications 542,655, 544,143, 548,911, 548,912, 549,081, 551,649 and 552,640, and in U.S.A. Specifications 2,129,281, 2,182,208, 2,286,763, 2,371,050 and 2,371,068.  Specified pigments are carbon black, lead chromate and titanium oxide and the emulsion may also contain emulsifying agents and solvents, e.g. benzone, xylene and butyl acetate. Specified vehicles are polymers of chloroprene, butadiene and isoprene or their copolymers with styrene, the halogenated styrenes, acrylic and methacrylic esters and amides, vinyl acetate, dimethyl vinyl ethinyl carbinol, or polymers of vinyl chloride, vinylidene chloride, styrene, or polyisobutylene, alkyd resins, e.g. glyceryl phthalate or tung oil modified glycerol phthalate, coumarone-indene, ester gum, rosin and silicones.ALSO:A pigmented aqueous emulsion of an organic liquid is prepared by dispersing in water together with the said organic liquid a pigment, the surface of which has been modified by having been subjected to the action of an organic silicon compound having attached to the silicon atom at least one organic group as hereinafter defined and at least one group which will react with water or with a hydroxyl radicle to split off a product which does not contain silicon.  The term "organic group" means only a hydrocarbon, or substituted hydrocarbon, group attached to the silicon atom either directly or through an oxygen atom.  The organic silicon compound may be an organic silicon halide which may have the general formula RaSiX(4-a), where R is a short or long chain saturated or unsaturated organic group as hereinbefore defined, X is a halogen atom and a is 1, 2 or 3. Suitable organic silicon compounds are set forth in Specifications 542,655, 544,143, 548,911, 548,912, 549,081, 551,649 and 552,640 and in U.S.A. Specifications 2,129,281, 2,182,208, 2,286,763, 2,371,050 and 2,371,068.  Specified pigments are carbon black, lead chromate and titanium oxide and the emulsion may also contain emulsifying agents and solvents, e.g. benzene, xylene and butylacetate.  Specified vehicles are rubber, rosin, ethylene chloride and chlorine-containing organic solvents.ALSO:A pigmented aqueous emulsion of an organic liquid is prepared by dispersing in water together with the said organic liquid a pigment the surface of which has been modified by having been subjected to the action of an organic silicon compound having attached to the silicon atom at least one organic group as hereinafter defined and at least one group which will react with water or with a hydroxyl radicle to split off a product which does not contain silicon.  The term " organic group " means only a hydrocarbon, or substituted hydrocarbon, group attached to the silicon atom either directly or through an oxygen atom.  The organic silicon compound may be an organic silicon halide which may have the general formula RaSiX(4-a), where R is a short or long chain saturated or unsaturated organic group as hereinbefore defined, X is a halogen atom and a is 1, 2 or 3. Suitable organic silicon compounds are set forth in Specifications 542,655, 544,143, 548,911, 548,912, 549,081, 551,649 and 552,640, [all in Group IV], and in U.S.A.  Specifications 2,129,281, 2,182,208 2,286,763, 2,371,050 and 2,371,068.  Specified pigments are carbon black, lead chromate and titanium oxide and the emulsion may also contain emulsifying agents and solvents, e.g. benzene, xylene and butyl acetate.  Specified vehicles are rubber, sulphur-vulcanizable synthetic rubbers, polymers of chloroprene, butadiene and isoprene or their copolymers with styrene, halogenated styrenes and acrylic and methacrylic esters and amides.