公开(公告)号：DE1169121B

公开(公告)日：1964-04-30

申请号：DEB0062855

申请日：1961-06-10

Applicant: BASF AG

Inventor： FRICKER DR ROLF ,  GEIST DR KURT

IPC: C08L21/00 ,  C08L25/12

公开(公告)号：DE1003446B

公开(公告)日：1957-02-28

申请号：DEB0038416

申请日：1955-12-22

Applicant: BASF AG

Inventor： FRICKER DR ROLF ,  OHLINGER DR HELMUT

IPC: C08F2/18 ,  C08F212/10 ,  C08F261/06

公开(公告)号：DE1240327B

公开(公告)日：1967-05-11

申请号：DEB0063453

申请日：1961-07-29

Applicant: BASF AG

Inventor： JUNG DIPL-LANDW DR JOHANN ,  FRICKER DR ROLF

IPC: A01G31/00 ,  C05D9/00

公开(公告)号：DE961309C

公开(公告)日：1957-04-04

申请号：DEB0033501

申请日：1954-11-25

Applicant: BASF AG

Inventor： OHLINGER DR HELMUT ,  FRICKER DR ROLF

IPC: C08F212/10 ,  C08F220/44

Abstract: Transparent copolymers are made by preparing a solution of from 50 to 90 per cent of a styrene and 50 to 10 per cent of acrylonitrile in an organic solvent having at least one hydroxyl group in the molecule which is miscible with water and in which the copolymer formed is insoluble, and with the addition of an organic protective colloid, effecting copolymerization while agitating the solution. Styrenes specified are styrene, alpha-methylstyrene, alpha-chlorostyrene, nuclear methylated styrenes and mixtures thereof. Suitable organic solvents are methanol, ethanol, propanol, isopropanol, butanols, ethylene, propylene and butylene glycols and glycerine; if desired the solvent may contain up to 20 per cent of water. Protective colloids specified are poly-N-vinyl pyrrolidone, a copolymer of vinyl pyrrolidone and methyl acrylate, a copolymer of styrene and maleic anhydride, a copolymer of vinyl pyrrolidone and methacrylamide and polyvinyl methyl and ethyl ethers. Polymerization is preferably accelerated by the use of catalysts such as benzoyl, p-chlorbenzoyl, cyclohexanone, lauroyl and di-tert.-butyl peroxides, tert.-butyl hydroperoxide, azo-bis-(isobutyronitrile), p - chlorphenyl - azo - triphenylmethane, p - chlorphenyl - azo - tri - p - tolylmethane, phenyl - azo - tri - p - anisylmethane, o - nitrophenyl - azo - biphenylmethane, m-chlorphenyl - azo - triphenylmethane, alphanaphthyl - azo - triphenylmethane and phenyl-azo - triphenylmethane. The polymerization mixture may also contain a lubricant such as butyl stearate, diethylene glycol monomethyl ether, lauryl alcohol or stearyl alcohol. During polymerization the copolymer separates out in the form of particles generally having a diameter between 0.02 and 1.0 mm.