Patent GB-527075-A (GB)
Title: A process for manufacturing films, ribbons, foils, threads, and fibres
IPC: C08C19/00
Filed: 1938-12-19
Abstract: 527,075. Reaction products of rubbers. FIFE, J. G. (Naamlooze Vennootschap de Bataafsche Petroleum Maatschappij). Dec. 19, 1938, Nos. 36928/38, 15971/39 and 32189/39. [Class 70] [Also in Group IV] Multi-unsaturated organic compounds of high molecular weight (at least about 5000) are reacted with inorganic acids or anhydrides {except those of highest state of valency where the acid-forming element has more than one valency) in the presence of liquid organic compounds containing " ether like " oxygen atoms {i.e. oxygen atoms linked by single bonds to each of two carbon atoms). Suitable initial bodies are polymers of butadiene, acetylene and their substitution products and homologues and co-polymers of these substances with other unsaturated bodies such as olefines, styrene, vinyl esters, acrylic and methacrylic acids and unsaturated aldehydes, ketones and ethers, and also natural rubber. Suitable inorganic acids and anhydrides are phosphorous, sulphurous, and nitrous anhydrides and acids ; hydrogen sulphide and halogen hydrides, but mixtures which produce free sulphur (such as SO 2 +H 2 S) are excluded. Activating agents such as metal salts which form addition compounds with ether-like compounds may also be present. The reaction may be effected in the presence of a solvent or solvent mixture which may itself contain an ether-like compound. In examples (1) SO 2  is passed into butadiene polymer in benzene and dioxane is added (3) rubber in benzene is treated with SO  2  and dioxane ; (4) a divinyl acetylene polymer is treated similarly ; (5) hydrogen sulphide is passed into butadiene polymer in dioxane ; (6) butadiene polymer in dioxane is coagulated in a bath containing acetic acid, water, and sulphur dioxide ; (7) a bath containing methanol, water, and sulphur dioxide is used for coagulating butadiene polymer solutions in a dioxane alone and together with di-isopropyl ether, diethyl acetal, paraldehyde, diethyl ether, pentane, carbon disulphide and benzene respectively ; (8) NO+NO 2  is passed into butadiene polymer in dioxane, isopropyl ether and benzene, methyl propene methylene dioxide, ethene methylene dioxide, and dioxane and isopropyl ether respectively, butadiene polymer in dioxane is coagulated in (9) aqueous sodium nitrate and hydrochloric acid, (10) aqueous phosphorous acid (11) nitrous acid saturated with SO 2  (12) mixtures of menthanol, water and SO  2  containing FeSO 4  FeCl 3  and MnSO 4  respectively, but CuSO 4  and ZnCl 2  may also be used ; (13) a solution of butadiene polymer in dioxane is spun upwardly into a vertical tube filled with a coagulation liquid consisting of ethyl and benzyl alcohols and water saturated with SO  2  (14) the same dutadiene polymer solution into ethyl alcohol saturated with SO 2 ; (15) butadiene polymer in dioxane is injected into a coagulation bath containing boron fluoride, acetic acid and SO 2  ; (16) butadiene polymer in dioxane and paraldehyde is injected into liquid SO 2  at -15‹C. ; (17) butadiene polymer in dioxane is spun into a vertical tube filled with SO  2  at 60‹C.; (18) neoprene and butadiene polymer in dioxane is coagulated in a bath containing methanol, water and SO 2  to produce films ; (19) butadiene polymer and ethyl cellulose or cellulose acetate in dioxane is coagulated in the same mixture ; (20) butadiene polymer in dioxane is poured into a silk gauze and SO  2  + CO  2  is passed over the film, leaving a gastight layer ; (21) linen is boiled in dioxane and then immersed in butadiene polymer in dioxane containing Igepon T,"Igepon" being a Registered Trade Mark, the material being then pressed and passed into a bath containing methanol, water and SO  2  washed and dried, this treatment increases the crease stability. Specification 500,515 is referred to.