Patent GB-1266061-A (GB)
IPC: G03C1/85
Filed: 1969-02-24
Abstract: 1,266,061. Antistatic resins. TOKYO SHIBAURA ELECTRIC CO. Ltd. 24 Feb., 1969 [24 Feb., 1968], No. 9860/69. Headings C3B, C3P, C3R and C3T. Antistatic resinous materials are obtained by incorporating in said resinous materials or, alternatively in the case of addition polymers the monomer(s) therefor, a composition comprising (a) a hydroxyl group-containing component which is a polyoxyalkylene glycol or an alkyl or aralkyl ether of a polyoxyalkylene glycol, (b) an organosilane, organohalosilane, organodisilane, organohalodisilane, organopolysilane, organohalopolysilane, organopolysiloxane, organohalopolysiloxane, organosilylalkylene, organohalosilylalkylene, organosilylarylene or organohalosilylarylene, and (c) an organoelemental compound having one or more organic radicals bonded through an oxygen atom to a tin, boron, lead, phosphorus or antimony atom component (a) forming 20 to 80% by weight of the total weight of components (a) and (b); and subjecting the material to the action of heat so that the composition reacts under the influence of heat to yield an organosilicon compound containing a polyoxyalkylene group bonded to a silicon atom through an oxygen atom; and, in the case of the said monomers, polymerizing them to yield an addition polymer. The requisite heat may be applied to the resinous material during conventional processing operations or, in the case of the said monomers, during the polymerization thereof. As an alternative to the above process the composition of (a), (b) and (c) may be applied to the surface of a resinous material and the latter subsequently subjected to heat treatment. Specified resinous materials are polystyrene, polyacrylate, epoxy, phenolic, alkyd, polyester, polyethylene, polypropylene, P.V.C. and ABS resins. Specified monomers are styrene, methacrylic acid and methyl methacrylate. The antistatic compositions incorporated in the resinous materials may also contain adsorbents such as aluminosilicates, alumina and silica gel, as well as stabilizers, self-extinguishing agents, pigments, dyestuffs, lubricants or plasticizers. In examples component (a) is represented by heptaethylene glycol monolauryl ether, polyethylene glycol monomethyl ether of molecular weight 450, polypropylene glycol and polyethylene glycol of molecular weights 400, 600 and 1000; component (b) is represented by a partial hydrolysate of ethylsilicate containing 45% of free ethoxy groups, tetraethoxydimethyldisilane, tetraethoxydimethylsilylmethylene, tetraethoxydimethylsilylphenylene, diphenyldihydroxysilane and polymethylhydrogenpolysiloxane; component (c) is represented by dibutyl tin maleate, dibutyl tin laurate, dibutyl tin dioctoate and triethyl lead hexyl maleate; optional adsorbents are represented by an aluminosilicate; and the materials treated are represented by polyethylene (which is subsequently extrusion moulded into films), polystyrene, acrylonitrile-styrene resin and ABS resin (which are subsequently moulded into circular plates), methyl methacrylate (which is subsequently polymerized in presence of a benzoyl peroxide catalyst), polyester resin (which is subsequently spun to a yarn and woven to form a fabric), and a mixture of epoxy resin and triethylene tetramine (which is subsequently cast into a rod).