Patent GB-684515-A (GB)
Title: A process for the stabilisation of vinyl halide polymers and the resulting stabilised polymers
IPC: C08K5/11
Filed: 1950-07-19
Abstract: Vinyl halide polymers are light-stabilized by mixing therewith in an amount between 0.01 and 5 per cent by weight of the resulting mixture, an ester of a polycarboxylic acid and an unsaturated alcohol possessing at least one olefinic linkage not more than 4 carbon atoms removed from the carbinol carbon atom and a similar amount of either an epoxy-group containing organic compound or a salt of a weak carboxylic acid or a mixture thereof. The polymers may be polyvinyl chloride, polyvinyl bromide and copolymers of vinyl halides with diethyl fumarate, methylmethacrylate, acrylonitrile, styrene, ethylene, butadiene, allyl alcohol, diallyl ether, divinyl succinate, diallyl phthalate, vinyl acetate, vinyl butyrate, vinyl benzoate, allyl acetate, or diallyl adipate.  Esters specified are diallyl phthalate, diallyl maleate, dimethallyl maleate, diethallyl fumarate, 2-butenyl allyl glutaconate, diallyl hydromuconate, diallyl octenedioate, dimethallyl dodecenedioate, 2-octenyl methallyl heptenedioate, allyl vinyl phthalate, diallyl diglycollate, methallyl allyl adipate, di-2-butenyl maleate, di-2-hexenyl azelate, diethallyl glutarate, 2-octenyl vinyl fumarate, divinyl sebacate, dichloro-2-pentenyl dihydroacrylate, di-2-hexenyl maleate, methallyl vinyl tartrate, dimethallyl itaconate, ethallyl vinyl succinate, diallyl naphthalate, trimethallyl trimesate, triallyl hemimellitate or di-2-pentenyl isophthalate.  The epoxy compounds may be monomers and polymers of compounds such as epoxypropane and derivatives, tris- and bis-(epoxyalkoxy) benzenes, and substituted benzenes, glycidyl stearate, glycidyl caproate, bis-(epoxyalkoxy) diphenyl ethers, bis-(epoxyalkoxy) cyclohexane, cyclopentane, and cyclohexenes, the polyepoxy polyhydroxy polyethers obtained by reacting a polyhydroxylalcohol with a polyepoxide, the reaction product of glycerol and 3 moles. of bis - (2 : 3 - epoxypropyl) ether, the reaction product of sorbitol and 6 moles of bis-(2 : 3-epoxy - 2 - methylpropyl) ether, the reaction product of pentaerythritol and 5 moles of 1 : 2-epoxy-4 : 5-epoxypentane, and ethylenic polymers of epoxy compounds, e.g. poly (allyl-2 : 3-epoxy-propyl ether), poly (2 : 3-epoxypropyl crotonate), allyl 2 : 3-epoxypropyl ether-styrene copolymer, methallyl 3 : 4-epoxybutyl ether-allyl benzoate copolymer, poly (4 : 5-epoxypentyl crotonate), poly (4 : 5-epoxypentyl acrylate), poly (2 : 3 - epoxypropyl cyclohexenoate), poly (vinyl 2 : 3-epoxypropyl ether), allyl glycidyl ether-vinyl acetate copolymer, poly (methallyl 2 : 3-epoxypropyl ether), poly (allyl 1-methyl-2 : 3-epoxypropyl ether), poly (4-glycidyloxystyrene), poly (1-vinyl-2-pentadecenyl glycidyl ether), poly (tiglyl 3 : 4-epoxybutyl ether), poly (allyl glycidyl ether), and the polymeric reaction product of bis - (4-hydroxyphenyl)-2 : 2 propane and epichlorohydrin.  Specified salts are calcium stearate, lead resinolate, calcium diisopropyl salicylate, magnesium diisopropyl salicylate, and chelate ring compounds formed by heating the last two compounds, calcium octyl salicylate, strontium naphthenate, cadmium naphthenate, lead stearyl salicylate, lithium stearate, lead palmitate, calcium behemate, calcium azelate, lead lanocerate, strontium salicylate, lead cerotate, calcium lanomyristate, cadmium tartrate, strontium melissate, strontium phthalate, calcium sorbitate, and barium palmitate.  Modifying agents such as plasticizers, pigments and fillers may be added to the vinyl halide polymer at any stage. The stabilized polymers may be made into sheets.