Title:
STYRENIC BLOCK COPOLYMER AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3107251
Kind Code:
B2
Abstract:
PURPOSE: To efficiently obtain the subject copolymer having excellent heat resistance, chemical resistance, toughness, etc., by polymerizing a styrenic monomer in the presence of a specific catalyst, adding a specific macro-monomer to the polymer and polymerizing.
CONSTITUTION: First, (A) a styrenic monomer of the formula (Ar is a bifunctional aromatic group; R1 is H or a halogen, etc.; (p) is 1-5) is polymerized in the presence of a catalyst composed of a transition metal compound and an aluminum condensed compound. Then, (B) a macro-monomer containing a polymerizable vinyl group at the end, having 300-10,000 number-average molecular weight, obtained by polymerizing an anionic polymerizable monomer by using an anionic polymerization initiator and reacting the polymer with a halogen-containing unsaturated compound is added to the reaction system and polymerized to give the objective copolymer consisting of a polymer segment having a high degree of syndiotactic structure comprising the component A as a repeating unit and a polymer segment derived from the component B, having 0.07-20dl/g intrinsic viscosity at 135°C in trichlorobenzene.
Inventors:
Toshinori Tasaki
Shuji Machida
Shuji Machida
Application Number:
JP12281792A
Publication Date:
November 06, 2000
Filing Date:
April 17, 1992
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C08F297/02; C08F297/04; C08F297/06; C08F297/08; C08F299/00; (IPC1-7): C08F297/06
Domestic Patent References:
| JP4130114A |
Attorney, Agent or Firm:
Agata Akira (1 person outside)