TOKYO SHIBAURA ELECTRIC CO LTD UNSATURATED POLYESTER RESIN

摘要

1330069 Unsaturated polyester composition TOKYO SHIBAURA ELECTRIC CO Ltd 21 Dec 1971 [23 Dec 1970] 59401/71 Heading C3P An unsaturated polyester resin composition comprises a blend of (A) 5-20% by weight of an unsaturated polyester resin produced by reaction of an alcohol component containing 20-80 mol per cent of neopentyl glycol and an acid component containing 70-95 mol per cent of at least one acid selected from terephthalic acid and isophthalic acid, (B) 25-60% by weight of an unsaturated polyester resin having a double bond equivalency of 142-165 and produced by reaction of an acid component containing at least one acidic material selected from maleic acid, maleic acid anhydride and fumaric acid, and an alcohol component, and (C) 30- 60% by weight of an unsaturated monomer copolymerizing with the unsaturated polyester resin (B), the proportions of components (A), (B) and (C) being expressed in relation to the total composition. In the examples the compositions comprise: saturated polyesters prepared from propylene glycol, neopentyl glycol, isophthalic acid, orthophthalic acid anhydride, succinic acid and 2,3-butane diol; unsaturated polyesters prepared from propylene glycol, maleic acid anhydride, fumaric acid, diethylene glycol and ethylene glycol; styrene, diallyl phthalate, triallyl trimellitate, triallyl cyanurate, triallyl isocyanurate and vinyl toluene; hydroquinone, p-methoxyphenol, polyethyl methacrylate, polymethyl methacrylate, calcium carbonate, magnesia, zinc stearate, “ inch glass chop, synthetic resin fibres and powdered polyethylene and are cured using phthalic acid dioctyl paste of benzoyl peroxide and t-butyl perbenzoate.