Patent GB-1240227-A (GB)
Title: Method of producing high-molecular weight polyallyl alcohol
Inventor: KARGIN VALENTIN ALEXEEVICH
IPC: C03C25/26
Filed: 1969-08-14
Abstract: 1,240,227. Polyallyl homopolymer. INSTITUT NEFTEKHIMICHESKOGO SINTEZA IMENI A. V. TOPCHIEVA. 14 Aug., 1969, No. 40586/69. Heading C3P. Polyallyl homopolymer having a molecular weight of at least 10<SP>4</SP> is produced by effecting polymerization of allyl alcohol monomer in the presence of an inorganic complexing agent which forms a co-ordination bond with the functional group of allyl alcohol under the action of a radical initiator. Complexing agents: a salt of a metal of Groups I or II of the Periodic Table exemplified by calcium chloride, lithium chloride or nitrate, magnesium chloride, sulphate or perchlorate, and sodium sulphate, and inorganic acids such as chloric, hydrochloric, nitric, ortho- or metaphosphoric and sulphuric acids. Certain of the acids should be employed in the form of a solution in a polar solvent (including water). Molar ratios of allyl alcohol to complexing agent may range from 1:0À1 to 1 : 1. The polymerization may be carried out under the effects of high energy radiation in general, at a dose rate of from 1 x 10<SP>7</SP> to 1 x 10<SP>10</SP> rads at a temperature not higher than 200 C., γ-rays of Co<SP>60</SP>, mixed radiation of a nuclear reactor (consisting of neutrons and γ- rays), X-rays, ultraviolet radiation, and substances decomposing into radicals under heating or the effect of ultraviolet radiation at temperatures of from 0 to 30 C. Such substances can be hydrogen, benzoyl and tert. butyl peroxides, tert. butyl or cumene hydroperoxides, organic percarbonates, potassium persulphate and the dinitrile of azo isobutyric acid. The peroxide may be employed in combination with potassium persulphate and reducing agents such as quinone, aliphatic, aromatic, secondary and tertiary amines, and variable valency metals or salts thereof. The polymer produced can be separated from the complexing agent by dialysis Examples are directed to: (1) irradiating a solution containing 27% CaCl 2  in allyl alcohol with γ-rays of Co<SP>60</SP>; (2) irradiating a 15% CaCl 2  solution in allyl alcohol with the mixed radiation of a nuclear reactor; (3) treating a solution of MgCl 2  in allyl alcohol with fast electrons from an electron accelerator; (4) irradiating a solution of LiCl in allyl alcohol with X-rays; (5) polymerizing allyl alcohol containing ZnBr 2  in solution, in the presence of benzoyl peroxide decomposing under the effect of ultraviolet radiation with radiation of wavelength 300 mÁ, at 25 C.; (6) polymerizing allyl alcohol in the presence of aqueous hydrochloric acid, with a redox system containing FeCl 2  and hydrogen peroxide; (7) irradiating a mixture of concentrated hydrochloric acid and allyl alcohol with γ-rays of Co<SP>60</SP>; (8) irradiating a mixture of concentrated phosphoric acid and allyl alcohol with ultraviolet radiation; (9) polymerizing allyl alcohol in the presence of aqueous phosphoric acid, using an initiating system containing benzoyl peroxide and diphenyl amine; and (10) polymerizing ally] alcohol containing ZnBr 2  in solution, in the presence of the dinitrile of azoisobutyric acid.