公开(公告)号：JPS5531802A

公开(公告)日：1980-03-06

申请号：JP10274678

申请日：1978-08-25

Applicant: UBE INDUSTRIES

Inventor： SASAKI ICHIROU ,  NAKASHIMA KOUHEI ,  ISHIKAWA HIDEO ,  HAYASHI JIYUNNOSUKE ,  ASANO YUKIHIKO ,  INAISHI TANETOSHI

IPC: C08L47/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L33/00 ,  C08L33/02 ,  C08L101/00

Abstract: PURPOSE:To prepare a reinforced rubber composition useful for tire, etc. and having excellent tear strength, flex cracking resistance and modulus, by mixing the slurry of a syndiotactic 1,2-polybutadiene having high melting point with a rubber solution. CONSTITUTION:(A) 3-40 parts by weight of 1-15wt.% slurry of high melting point syndiotactic 1, 2-polybutadiene having a melting point of >=180 deg.C and reduced viscosity (0.2g/100cc tetralin solution, 135 deg.C) of 0.5-4 and prepared by polymerizing 1, 3-butadiene in an organic solvent (e.g. benzene, etc.) in the presence of a 1, 2-polymerization catalyst (e.g. used in Japanese Patent Publication No.47- 19892, etc.) and thereafter deactivating the product e.g. with blowing hydrogen chloride gas, is mixed with (B) 97-60 parts by weight of 1-20wt.% rubber solution at 10-70 deg.C under stirring. The unreacted 1, 3-butadiene and the organic solvent are distilled off by the steam distillation of the mixture solution to give a solid mixture.

公开(公告)号：JPS5529535A

公开(公告)日：1980-03-01

申请号：JP10184978

申请日：1978-08-23

Applicant: UBE INDUSTRIES

Inventor： SASAKI ICHIROU ,  NAKASHIMA KOUHEI ,  ISHIKAWA HIDEO ,  HAYASHI JIYUNNOSUKE ,  ASANO YUKIHIKO ,  INAISHI TANETOSHI

IPC: C08L47/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L33/00 ,  C08L33/02 ,  C08L101/00

Abstract: PURPOSE:To prepare a reinforced rubber composition having excellent tear strength and flexural crack resistance, by mixing a solution of a syndiotactic 1,2-polybutadiene and a rubber solution, and evaporating the solvent from the mixed solution. CONSTITUTION:A solution (A) prepared by dissolving 1-15 grams of high-melting syndiotactic 1,2-polybutadiene having a melting point of>=180 deg.C and a reduced specific viscosity of 0.5-3, in 100ml of an organic solvent such as aromatic hydrocarbons and aliphatic hydrocarbons, at 100-120 deg.C, is mixed with a solution (B) prepared by dissolving 1-20 grams of a rubber such as cis-1,4-polybutadiene or styrene-butadiene copolymer, in 100 ml of an organic solvent at 10-140 deg.C, and the organic solvents are removed from the mixture leaving a solid mixture of the syndiotactic 1,2-polybutadiene and the rubber. The weight ratio of the polybutadiene to the rubber is 3:97-40:60.