51367-58-9

Upstream product

• 61888-41-3 3-chloro-5-(4-methoxyphenyl)-cyclohex-2-enone 
• 105-45-3 acetoacetic acid methyl ester 
• 943-88-4 4-(p-methoxyphenyl)-3-butene-2-one 

Downstream Products

• 75852-64-1 [3-[(Z)-Hydroxyimino]-5-(4-methoxy-phenyl)-cyclohex-1-enyl]-acetic acid methyl ester 
• 51028-91-2 (5,4'-Dimethoxy-biphenyl-3-yl)-acetic acid 

Relevant academic research and scientific papers

Production of polybutadiene

PROBLEM TO BE SOLVED: To provide a novel manufacturing method of a polybutadiene rubber by reinforcing polybutadiene having a high cis-1,4-structure content obtained using a polymerization catalyst comprised of an yttrium compound having a bulky ligand with crystalline polybutadiene mainly composed of a syndiotactic 1,2-structure. ?SOLUTION: The manufacturing method of the polybutadiene comprises cis-1,4-polymerizing 1,3-butadiene and subsequently syndiotactic 1,2-polymerizing 1,3-butadiene in the polymerization system, wherein a catalyst obtained from (A) the yttrium compound having a bulky ligand, (B) an ionic compound comprised of a non-coordinating anion and a cation and (C) an organometallic compound of an element selected from among group 2, 12 and 13 elements in the periodic table is used as the catalyst for the cis-1,4-polymerization and a catalyst system comprising a sulfur compound is used as the catalyst for the syndiotactic 1,2-polymerization. ?COPYRIGHT: (C)2007,JPOandINPIT ?