GB644678A - Improvements in and relating to copolymers of monovinyl-phenoxthines - Google Patents

Abstract

Monovinylphenoxthines are copolymerized with a compound containing a CH2=C< group, e.g. butadiene, hexadiene-1,5, octadiene-1,4, 2-chlorobutadiene-1,3, 2,3-dimethyl-butadiene-1,3, 2-cyano-butadiene-1,3, cyclopentadiene, isoprene, piperylene; styrene, p-chlorostyrene, di- and tri-chlorostyrenes, chlorinated methyl styrene, methyl styrene, divinylbenzene, chlorinated divinylbenzenes, divinyl biphenyl, chlorinated vinyl naphthalenes, vinyl fluorenes, acenaphthylene; acrylo- and methacrylonitrile, acryl- and methacrylamide, methyl, benzyl para-chlorobenzyl, allyl, methallyl, amyl acrylates, ethylene glycol diacrylate and glyceryl triacrylate, methyl, benzyl, allyl, hexyl methacrylates, diethylene glycol dimethacrylate, methyl and propyl a -chloroacrylates and ethyl a -bromoacrylate; maleic anhydride; dimethyl and diallyl fumarates, diethyl and dimethallyl maleates; diethyl, diethylene and dimethallyl itaconates; diallyl citraconate; triallyl citrate and aconitate; methylene methyl, or ethyl malonates; vinyl methyl and ethyl ethers and divinyl ethers; dimethallyl phthalate; vinyl chloride, acetate, propionate, and butyrate; vinylidene chloride and vinyl methyl ketone, ethylene, chloro-, fluoro-, and chlorofluoroethylenes, by heating in bulk, solution, e.g. in benzene or acetone, emulsion or suspension with a catalyst, e.g. oxygen, ozone, ozonides, hydrogen peroxide, hydrochloric, hydrofluoric or sulphuric acid, boron fluoride, stannic chloride, antimony pentachloride, halogens, benzoyl, acetyl, stearyl, lauryl, sodium or barium peroxide, butyl hydroperoxide, persulphates, perchlorates or perborates, carbon black, finely divided silica, metallic powders and finely divided clays, or ultra-violet light. In an example, 3-vinylphenoxthine is heated with butadiene in aqueous emulsion with stearic acid, potassium persulphate, potassium hydroxide and dioctyl sodium sulfosuccinate. The product is dissolved in toluene and precipitated by methyl alcohol. Films may be cast from ethylene dichloride solution. Plasticizers and fillers, e.g. a -cellulose, mica dust, titanium oxide, talc, zinc oxide, magnesium oxide, asbestos, quartz, wood flour, cellulose or wool fibres may be added. The products, in combination with paper, glass fibres, cotton, silk, rayon, nylon, sheet asbestos, cellulose acetate and acetobutyrate, may be used as dielectrics, e.g. in capacitors, or as cable impregnants, or filling compounds copolymerized in situ. Specification 644,677 is referred to.