METHOD OF PRODUCING OF ALTERNATING COPOLYMERS OF CONJUGATED DIENES AND CONJUGATED POLAR VINYL MONOMERS

• Main Authors: MIYAMOTO S,JA, HAYAKAWA Y,JA, SHIMOMURA T,JA, ONISHI A,JA, IRAKO K,JA, KAWAGOE T,JA
• Format: Patent
• Language: English
• Published: 05.02.1974
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

1,248,641. Alternating copolymerization. BRIDGESTONE TIRE K.K. 14 Oct., 1969 [14 Oct., 1968; 16 Oct., 1968; 18 Oct., 1968; 22 Oct., 1968; 8 Feb., 1969; 13 Feb., 1969; 7 March, 1969], No. 50512/69. Heading C3P. Alternating copolymers are obtained by copolymerizing (A) a conjugated diene with (B) a (meth)acrylonitrile or an α,#-unsaturated carboxylic acid ester in the presence of a catalyst prepared in the presence of (B) and comprising (C) a transition metal compound of Group IV or V, (D) certain organometallic compounds and, optionally, (E) a further component such as metal halides, free-radical systems or molecular weight regulators. The monomers are typically (A) butadiene or isoprene, and (B) acrylonitrile, n-butyl acrylate, or methylmethacrylate, and mixtures thereof. The catalyst components are typically (C) AlEtCl 2 , AlEt 3 , ZnEt 2 , Et2Cd, Et 2 Be, Et 3 B, AlEt 3 Cl or Al 2 Et 3 Cl 3 , (D) VOCl 3 , VCl 4 , VO(O - t-Bu)3, VOCl 2 , vanadyl acetylacetonates, ZrCl 4 , TiCl 4 , (EtO) 5 Ta, zirconium chloroanilate, and Zr and Ti esters, and (E) azobis-isobutyronitrile, t-butyl peroxide, Et 3 B-O 2 (as air), diisopropyl peroxy-dicarbonate, dimethylaniline, n-dodecylmercaptan, CBr 4 , (t-C 4 H 9 ) 2 S 2 , CHBr 3 , AlCl 3 , SnCl 4 , Et 3 SnCl, ZnCl 2 , CdCl 2 , MgCl 2 . HgCl 2 , GaCl 3 , BeCl 2 and CaCl 2 . The conjugated diene units are substantially trans-1,4. The polymers are rubbery and may be vulcanized.