GB1021388A - New plastisols and organosols - Google Patents

Abstract

Plastisols and organosols comprise a pulverulent, halogen-containing vinyl polymer, a polymerizable plasticizer in which said polymer is substantially insoluble at room temperature, a polymerization catalyst and a stabilizer for the vinyl polymer, said plasticizer consisting at least in part of a compound of formula <FORM:1021388/C3/1> where R is an aliphatic, cycloaliphatic, araliphatic or aromatic residue. Specified polymers are polyvinyl chloride, copolymers of vinyl chloride with vinyl acetate, maleic anhydride, ethylene, acrylonitrile, vinylidene chloride or acrylic acid esters, chlorinated polyvinyl chloride and partially hydrolysed copolymers of vinyl chloride with vinyl acetate or vinyl acetals. In the plasticizers R may be a residue of 2-chlorallyl,allyl, methyl, ethyl, propyl, butyl, amyl, hexyl, octyl, lauryl, stearyl, oleyl, cyclohexyl or benzyl alcohols. Other plasticizers, e.g. dioctyl phthalate, diallyl phthalate, dibutyl sebacate and dibutyl adipate. Many suitable catalysts are listed, including hydrazine derivatives, tetraethyl lead, azodiisobutyronitrile, acyl and halogenated acyl peroxides, hydrocarbon peroxides and hydroperoxides, peracids, persalts and peresters. Many suitable stabilizers are listed, including calcium, strontium, barium, cadmium and lead soaps, basic lead salts, organotin salts and mono- and polyepoxides. Adhesion to substrates may be improved by adding basic substances, e.g. basic lead salts and alkaline earth metal hydroxides. The compositions may also contain fillers and pigments e.g. titanium dioxide, iron oxide, vegetable fillers and reinforcing agents, and solvents, e.g. acetone, tetrahydrofuran, cyclohexanone, toluene and xylene, and may be used for coating and cementing metals, wood, ceramics, textiles of polyamide or polyeste fibres, and making laminates, printing inks, putties and dipping, casting and potting resins. Examples describe compositions comprising polyvinyl chloride and (1) bis-(2-chlorallyl) phthalate, di-n-octyl phthalate, titanium dioxide, tertiary butyl perbenzoate, as stabilizer a mixture of basic lead carbonate and dibasic lead phthalate, barium (cadmium palmitate or dibutyl tin maleate, and optionally calcium hydroxide; (2) bis-(2-chlorallyl) phthalate, 2-ethylhexyl 2-chlorallyl phthalate and/or di-2-ethylhexyl phthalate, titanium dioxide, tertiary butyl perbenzoate, calcium hydroxide and barium/cadmium palmitate or epoxy resin; (5) bis-(2-chlorallyl) phthalate, 2-ethylhexyl 2-chlorallyl phthalate, di-2-ethylhexyl phthalate, chromium oxide, tertiary butyl perbenzoate, barium/cadmium palmitate and calcium hydroxide; together with (3) isophorone and toluene; and (4) butanol, amyl alcohol and decalin.ALSO:Substrates may be coated with plastisols and organosols comprising a pulverulent, halogen-containing vinyl polymer, a polymerizable plasticizer of formula <FORM:1021388/B1-B2/1> where R is an aliphatic, cycloaliphatic, araliphatic or aromatic residue, in which the polymer is substantially insoluble at room temperature, a polymerization catalyst and a stabilizer for the vinyl polymer. The compositions may be used for coating metals, e.g. iron, copper, and brass, wood, ceramics and textiles of polyamide or polyester fibre. Specified polymers are polyvinyl chloride, copolymers of vinyl chloride with vinyl acetate, maleic anhydride, ethylene, acrylonitrile, vinylidene chloride and acrylic esters, chlorinated polyvinyl chloride and hydrolysed copolymers of vinyl chloride with vinyl acetate or vinyl acetals. R may be 2-chlorallyl, allyl, methyl, ethyl, propyl, butyl, amyl, hexyl, octyl, lauryl, stearyl, oleyl, cyclohexyl or benzyl. The compositions may also contain conventional plasticizers, pigments and fillers, and adhesion to the substrates may be improved by incorporating basic substances, e.g. basic lead salts and alkaline earth metal hydroxides. Many suitable catalysts, stabilizers and solvents are listed and in examples iron strips are coated by spraying with organol compositions comprising polyvinyl chloride, di-2-ethylhexyl phthalate, 2-ethylhexyl 2-chlorallyl phthalate, chrome oxide green, t.butyl perbenzoate, barium/cadmium palmitate, calcium hydroxide, and (3) bis(2-chlorallyl)-phthalate, isophorone and toluene, and (4) bis-(2-chlorallyl) isophthalate, butanol, pentanol and decalin.