-
公开(公告)号：US3470141A
公开(公告)日：1969-09-30
申请号：US3470141D
申请日：1967-01-23
Applicant: BAYER AG
Inventor： SZITA JENO , RINKLER HEINRICH , MARZOLPH HERBERT , NISCHK GUNTHER
IPC: C08F28/00 , C08F220/46 , C08F15/40 , C08F15/22
CPC classification number: C08F220/46 , C08F28/00 , Y10S526/923
-
公开(公告)号：US3449286A
公开(公告)日：1969-06-10
申请号：US3449286D
申请日：1966-06-15
Applicant: BAYER AG
Inventor： SZITA JENO , MARZOLPH HERBERT , UNGER OTTO
Abstract: Spinnable solutions of acrylonitrile polymers are prepared by polymerizing at 30-60 DEG C. in an organic solvent for the polymer a monomeric material containing 80-100% by weight acrylonitrile and up to 20% by weight of a copolymerizable compound in the presence of redox catalyst system comprising (a) an organic peroxide, (b) a sulphinic acid salt of an organic base and (c) a mineral acid. The comonomer may be an acrylic ester, e.g. methyl acrylate, a vinyl ester or a styrene derivative; comonomers with suitable groups for dyeing may also be used, e.g. sulphostyrene, N-(p-methacryloyl aminophenyl sulphonyl) - benzenesulphonamide or vinyl pyridine. The monomers used may contain stabilizers, e.g. thiosemicarbazide, ammonia, hydroquinone or derivatives. Peroxide catalysts specified are cumene and t-butyl hydroperoxides, methyl ethyl ketone, cyclohexanone and lauroyl peroxides, and mono-t-butyl peroxymaleate; the reducing agent is preferably a salt of an aromatic sulphinic acid. Specified mineral acids are hydrochloric, phosphoric and sulphuric acids. Oxalic may additionally be used to inhibit discoloration, e.g. when iron impurities are present. Suitable polymerization solvents include dimethyl formamide, dimethyl acetamide, dimethyl sulphoxide, ethylene carbonate and g -butyrolactone. At the end of the polymerization process, an inhibitor may be added to prevent polymerization of residual monomer. The polymer solutions obtained can be spun by dry or wet spinning processes.
-
Search Results
12
records
(took 0.01 seconds)
