Patent GB-834857-A (GB)
Title: Method of dispersing pigments in vinyl chloride resins
IPC: C09D127/06
Filed: 1957-12-24
Abstract: Coating compositions comprise (a) a resin consisting of a vinyl chloride homopolymer or copolymer with polymerizable olefinically unsaturated compounds and containing a major proportion of vinyl chloride, (b) a solvent for the resin, (c) a pigment, (d) a plasticizer and (e) between 0.5 and 5.0% by weight of the pigment of at least one organo-metallic additive consisting of a metal carboxylate of formula <FORM:0834857/IV (a)/1> M is silicon, tin or lead, R is an aryl, alkaryl, aralkyl, alkyl p  or substituted alkyl radical having from 10 to 18 carbon atoms, R1 is an aryl, alkaryl, aralkyl, alkyl or substituted alkyl radical having from 1 to 18 carbon atoms and x is an integer from 1 to 3; a metal amino alcohol derivative of formula <FORM:0834857/IV (a)/2> where M is silicon, tin, zirconium or lead, R is an aryl, alkaryl, aralkyl, alkyl or substituted alkyl radical having 1 to 18 carbon atoms, R1 is an aryl alkaryl, aralkyl, alkyl or substituted alkyl radical having 1 to 18 carbon atoms, R11 is an aryl, alkaryl, aralkyl, alkyl or substituted alkyl radical having 1 to 18 carbon atoms, R11 is an aryl, alkaryl, aralkyl, alkyl or substituted alkyl radical having 10 to 18 carbon atoms, x is a number from 0 to 3, and y is a number whose maximum value equals (4-x); or a metal polyhydric alcohol derivative of formula <FORM:0834857/IV (a)/3> where M is silicon, zirconium, tin or lead, R is an aryl, alkaryl, aralkyl, alkyl or substituted alkyl radical having 1 to 18 carbon atoms, R1 is hydrogen or a hydroxyl, alkyl or substituted alkyl radical, R11 is hydrogen, an alkyl or substituted alkyl radical, R111 is a hydroxyalkyl or substituted hydroxyalkyl radical and x is a number from 1 to 3.  Specified copolymerizable compounds are vinyl acetate, vinyl propionate, ethyl acrylate, dibutyl maleate, diethyl fumarate, vinylidene chloride, vinyl fluoride and ethylene.  Lists of suitable organometallic compounds and plasticizers are given and txamples describe the preparation of composieions comprising titanium dioxide, di-(2-ethylhexyl) phthalate and vinyl chloride-vinyl acetate copolymers with (1) methyl ethyl ketone, toluene and dibutoxy-di-(triethanolamine) silicate N,N-dioleate, (2) methyl isobutyl ketone, toluene and diethoxy-di-(triethanolamine)-silicate mono-oleate, and (3) methyl isobutyl ketone, toluene and butoxy stearyl polysilicate; di-(2-ethylhexyl) phthalate, methyl isobutyl ketone and toluene with (4) titanium dioxide, hydrolysed vinyl chloridevinyl acetate copolymer and diethoxy-di-(triethanolamine) silicate N,N-dioleate, (5) titanium dioxide, antimony oxide, vinyl chloride copolymer and diethoxy - di - (triethanolamine) silicate N,N-dioleate, and with hydrolysed vinyl chloride copolymer, dibutoxy-di-(triethanolamine) silicate N,N-dioleate and (6) phthalocyanine blue, (7) synthetic organic red and (8) synthetic iron oxide.  The compositions are preferably prepared by adding to a ball mill the pigment, solvent mixture and then the plasticizer, resin and organometallic compound.  The pigment dispersion thus obtained may be mixed with a vehicle comprising a solution of the resin in a solvent, and the product further thinned if desired by adding further solvent. The compositions may be coated, e.g. by spraying, on bonderised (the word "Bonderised" is a Registered Trade Mark) steel or on primed coldrolled steel and the coatings baked.