GB1039871A - Coated inorganic and organic substrate materials - Google Patents

Abstract

Inorganic oxide materials, e.g. silica, mica, quartz, sand, tale, diatomaceous earth, clays, asbestos, crystalline zeolites, iron oxides, zinc oxide, aluminium oxide, calcium oxide, chromium oxide, barium oxide and titanium dioxide, and calcium carbonate, are rendered water resistant and antistatic by coating them with a polysiloxane-oxyalkylene block copolymer comprising (a) at least one siloxane block containing at least two siloxane units represented by the formula <FORM:1039871/C1/1> in which R is a monovalent hydrocarbon radical, a halogen-substituted monovalent hydrocarbon radical or a divalent hydrocarbon radical and b is 1, 2 or 3, the siloxane block containing at least one siloxane unit in which at least one R is a divalent hydrocarbon radical and (b) at least one oxyalkylene block containing at least two oxyalkylene groups represented by the formula -R1O- in which R1 is an alkylene radical, the siloxane and oxyalkylene blocks being interconnected by the divalent hydrocarbon radical. Preferably each R radical contains 1-20 carbon atoms, the R radicals being the same or different in any given siloxane group or throughout the siloxane block and the value of b in the various siloxane groups in the siloxane block being the same or different. When R is a monovalent hydrocarbon radical it may be an alkenyl, cyclo alkenyl, alkyl, aryl, aralkyl, alkaryl or cyclo alkyl radical and when R is a divalent hydrocarbon radical it may be an alkylene, arylene or alkarylene radical. The siloxane block may contain organic chain-terminating groups as well as the mono-functional hydrocarbon radicals, e.g. hydroxyl, aryloxy, alkoxy and acyloxy radicals, and one or more siloxane groups having the formula <FORM:1039871/C1/2> in which R is as defined above, e is 0, 1 or 2, f is 1 or 2 and (e + f) is 1, 2 or 3. The radical R1 in the oxyalkylene block may contain 2-10 carbon atoms and the oxyalkylene block may also contain chain-terminating groups, e.g. hydroxy, aryloxy, alkoxy, alkenyl oxy radicals or the glyceroxy group <FORM:1039871/C1/3> The inorganic oxide materials may be in the form of powders or fibres and the copolymer may be applied in the form of an aqueous emulsion or solution in a volatile organic liquid, e.g. ethers, aliphatic, aromatic or halogenated hydrocarbons, or carbon disulphide, and the treated materials then heated at a temperature of 50-200 DEG C. for from 5 minutes to 24 hours. The coating composition may also contain nonionic, anionic or cationic emulsifying agents and curing catalysts, e.g. salts of lead, tin, zinc, copper, zirconium or titanium with lauric, palmitic, oleic stearic, coconut fatty acid or 2-ethylhexoic acid.ALSO:Fabrics, paper, leather and furs are coated with a polysiloxane-oxyalkylene block copolymer comprising (a) at least one siloxane block containing at least two siloxane units represented by the formula <FORM:1039871/B1-B2/1> in which R is a monovalent hydrocarbon radical, a halogen-substituted monovalent hydrocarbon radical or a divalent hydrocarbon radical and b is 1, 2 or 3, the siloxane block containing at least one siloxane unit in which at least one R is a divalent hydrocarbon radical and (b) at least one oxyalkylene block containing at least two oxyalkylene groups represented by the formula -R1O- in which R1 is an alkylene radical, the siloxane and oxyalkylene blocks being interconnected by the divalent hydrocarbon radical. Preferably each R radical contains 1-20 carbon atoms, the R radicals being the same or different in any given siloxane group or throughout the siloxane block and the value of b in the various siloxane groups in the siloxane block being the same or different. When R is a monovalent hydrocarbon radical it may be an alkenyl, cyclo alkenyl, alkyl, aryl aralkyl, alkaryl or cyclo alkyl radical and when R is a divalent hydrocarbon radical it may be an alkylene, arylene or alkarylene radical. The siloxane block may contain organic chain-terminating groups as well as the mono-functional hydrocarbon radicals, e.g. hydroxyl, aryloxy, alkoxy and acyloxy radicals, and one or more siloxane groups having the formula <FORM:1039871/B1-B2/2> in which R is as defined above, e is 0, 1 or 2, f is 1 or 2 and (e + f) is 1, 2 or 3. The radical R1 in the oxyalkylene block may contain 2-10 carbon atoms and the oxyalkylene block may also contain chain-terminating groups, e.g. hydroxy, aryloxy, alkoxy, alkenyl oxy radicals or the glyceroxy group <FORM:1039871/B1-B2/3> Fabrics made from cotton, linen, ramie, hemp, jute, cellulose ether, cellulose acetate, viscose rayon, cuprammonium rayon, glass, asbestos, natural silk, tussore silk, wool, polyamide, acrylic, vinyl, vinylidene, polyester and polyethylene fibres, may be treated. The materials may be coated by immersing, brushing or spraying them with the copolymer in the form of aqueous emulsion of solution in a volatile organic liquid, e.g. ethers, aliphatic, aromatic or halogenated hydrocarbons, or carbon disulphide, and then heating at a temperature of 50-200 DEG C for from 5 minutes to 24 hours. The coating composition may also contain nonionic, anionic or cationic emulsifying agents and curing catalysts, e.g. salts of lead, tin, zinc, copper, zirconium or titanium with lauric, palmitic, oleic, stearic, coconut fatty acid or 2, ethylhexoic acid.ALSO:Textile materials are rendered water repellant, soft, antistatic, soil resistant, crease resistant and dimensionally stable and are lubricated by coating them with a polysiloxane-oxyalkylene block copolymer comprising (a) at least one siloxane block containing at least two siloxane units represented by the formula Rb Si O4-b/2 in which R is a monovalent hydrocarbon radical, a halogen-substituted monovalent hydrocarbon radical or a divalent hydrocarbon radical and b is 1, 2, or 3, the siloxane block containing at least one siloxane unit in which at least one R is a divalent hydrocarbon radical and (b) at least one oxyalkylene block containing at least two oxyalkylene groups represented by the formula -R1O- in which R1 is an alkylene radical, the siloxane and oxyalkylene blocks being interconnected by the divalent hydrocarbon radical. Preferably each R radical contains 1-20 carbon atoms, the R radicals being the same or different in any given siloxane group or throughout the siloxane block and the value of b in the various siloxane groups in the siloxane block being the same or different. When R is a monovalent hydrocarbon radical it may be an alkenyl, cyclo alkenyl, alkyl, aryl, aralkyl, alkaryl or cyclo alkyl radical and when R is a divalent hydrocarbon radical it may be an alkylene, arylene or alkarylene radical. The siloxane block may contain organic chain-terminating groups as well as the mono-functional hydrocarbon radicals, e.g. hydroxyl, aryloxy, alkoxy and acyloxy radicals, and one or more siloxane groups having the formula <FORM:1039871/D1-D2/1> in which R is as defined above, e is 0, 1 or 2, f is 1 or 2 and (e + f) is 1, 2 or 3. The radical R1 in the oxyalkylene block may contain 2-10 carbon atoms and the oxyalkylene block may also contain chain-terminating groups, e.g. hydroxy, aryloxy, alkoxy, alkenyl oxy radicals or the glyceroxy group <FORM:1039871/D1-D2/2> The textile materials, e.g. cotton, linen, ramie, hemp, jute, cellulose ether, cellulose acetate, viscose rayon, cuprammonium rayon, glass, asbestos, natural silk, tussore silk, wool, polyamide, acrylic, vinyl, vinylidene, polyester and polyethylene fibres, may be in the form of filaments, rovings, yarns, mats or cloth. The materials may be coated by immersing, brushing or spraying them with the copolymer in the form of an aqueous emulsion or solution in a volatile organic liquid, e.g. ethers, aliphatic, aromatic or halogenated hydrocarbons, or carbon disulphide, and then heating at a temperature of 50 DEG -200 DEG C. for from 5 minutes to 24 hours. The coating composition may also contain nonionic, anionic or cationic emulsifying agents and curing catalysts, e.g. salts of lead, tin, zinc, copper, zirconium or titanium with lauric, palmitic, oleic, stearic, coconut fatty acid or 2, ethylhexoic acid.