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acetate acid added agent alcohol aliphatic alkali metal alkoxy alkyl alloy aluminium amine ammonium and/or aqueous aryl atoms benzene British carbon carboxylic carboxylic acid catalyst cellulose chamber CHEM chloride coating composition compound comprising consisting containing contng cooling copolymer cpds device distillation dyestuff electrical electrode ester ether ethylene example fibres filter formaldehyde formula shown wherein fuel furnace Germ glycol Grignard reagent halide halogen heating hydrocarbon hydrogen hydroxide inert inorganic layer least liquid mach material methanol methyl mixed mixture mole molten mould obtained olefin organic oxide oxygen particles phenol PLASTICS polyethylene polymer polymerisation powder pref preferably prepared by reacting prepd presence pressure radical reaction reactor resin rubber salt silane silica silicon siloxane sodium solid soln soluble solution solvent substd suitable surface Switz temp thereof tube UNION CARBIDE vapour vinyl welding zone