Patent GB-458816-A (GB)
Title: Improvements in and relating to dispersions of solids in liquids
IPC: D06M15/03
Filed: 1935-06-21
Abstract: Dispersions are made by agitating together a finely divided non-reactive water-insoluble material which remains solid under the conditions of dispersion and an aqueous solution of a salt of a deacetylated chitin or deacetylated chondroitin with or without additions such as wetting agents.  The deacetylated substances may be prepared as described in Specification 458,839.  Examples of solids which may be dispersed are titanium dioxide, lithopone, barium sulphate, talc, calcium carbonate, china clay, chrome yellows, iron blues, carbon black, phosphotungstic acid colours and pigments, zinc chromate and sulphide, silica, iron oxide, graphite, madder and maroon lakes, lead arsenate, barium fluosilicate, asbestine, carborundum powder, bronze powder, paper-makers' clay, anthraquinone dyes, red lead, ultramarine blue, chrome green, barium magnesium and calcium titanates, aluminium stearate, thiodiphenylamine, and ethyleneglycol-di-b -naphthyl ether.  Mould preventives such as phenol, thymol, chlorocresols, salicylanilide and hexylresorcinol, glue and gelatine, wetting agents such as saponin or hymolal salts, softeners such as glycerol or formamide, penetration assistants such as stearylbetaine and hydroxyethyldimethyl-stearylammonium chloride, and chemicals which react with amino groups, e.g. formaldehyde, may be added. Water-insoluble materials such as resins, oils and waxes may be emulsified with the dispersion.  Fabrics of silk, wool, linen, cotton, rayon may be impregnated with the dispersions and may be subsequently heated or treated with formaldehyde, acetic anhydride or ammonia gas or solution to increase water resistance. Dispersions of carbon black and Milori blue may be used for delustring fabrics. Specifications 458,815 and 458,817, [both in Group III], are referred to.ALSO:Dispersions are made by agitating together a finely divided non-reactive water-insoluble material which remains solid under the conditions of dispersion and an aqueous solution of a salt of a deacetylated chitin or deacetylated chondroitin with or without additions such as wetting agents.  The deacetylated substances may be prepared as described in Specification 458,839, [Group IV]. Examples of solids which may be dispersed are titanium dioxide, lithopone, barium sulphate, talc, calcium carbonate, china clay, chrome yellows, iron blues, carbon black, phosphotungstic acid colours and pigments, zinc chromate and sulphide, silica, iron oxide, graphite, madder and maroon lakes, lead arsenate, barium fluosilicate, asbestine, carborundum powder, bronze powder, paper makers' clay, anthraquinone dyes, red lead, ultramarine blue, chrome green, barium, magnesium and calcium titanates, aluminium stearate, thiodiphenylamine, and ethyleneglycol-di-b -naphthyl ether.  Mould preventives such as phenol, thymol, chlorocresols, salicylanilide and hexylresorcinol, glue and gelatine, wetting agents such as saponin or hymolal salts, softeners such as glycerol or formamide, penetration assistants such as stearylbetaine and hydroxyethyldimethyl - stearylammonium chloride, and chemicals which react with amino groups, e.g. formaldehyde, may be added.  Water-insoluble materials such as resins, oils and waxes may be emulsified with the dispersion. Fabrics of silk, wool, linen, cotton, rayon, leather, nitrocellulose coated fabric, glass, tin, rubber, cork, plaster, wood, and paper may be coated or impregnated with the dispersions and may be subsequently heated or treated with formaldehyde, acetic anhydride of ammonia gas or solution to increase water resistance.  Dispersions of carbon black and Milori blue may be used for printing acetate and viscose rayon and for delustring fabrics and when treated with glycerine may be used as writing inks.  The dispersions may also be used for pigmenting paper by adding them to the pulp or as sizes; abrasive cloth and paper may be made using dispersions of abrasives or by dusting abrasives on a base coated with the dispersion and then insolubilizing. Dispersions may be made containing solid moth-proofing agents or insecticides, e.g. barium fluosilicate and lead arsenate. Specifications 458,815 and 458,817 also are referred to.ALSO:Dispersions are made by agitating together a finely divided non-reactive water insoluble material which remains solid under the conditions of dispersion and an aqueous solution of a salt of a deacetylated chitin or deacetylated chondroitin with or without additions such as wetting agents.  The deacetylated substances may be prepared as described in Specification 458,839, [Group IV]. Dispersions may be made containing solid moth-proofing agents or insecticides, e.g. barium fluosilicate and lead arsenate. Specifications 458,815 and 458,817, [both in Group III], also are referred to.