The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 1997
Filed:
Jan. 24, 1996
Applicant:
Inventor:
Tetsuo Ogawa, Hiratsuka, JP;
Assignee:
Kansai Paint Co., Ltd., Hyogo-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ;
U.S. Cl.
CPC ...
526193 ; 526204 ; 526217 ; 5262181 ; 526219 ; 5262192 ; 5262193 ; 5262196 ; 526230 ; 526232 ; 5262321 ; 526240 ; 526293 ; 526299 ; 526311 ; 526346 ; 526347 ; 5263471 ;
Abstract
The present invention provides a process for producing a styrene or styrene derivative polymer of narrow molecular weight distribution, which comprises (co)polymerizing a styrene or styrene derivative monomer using, as the catalyst system, a mixture of a free radical compound, a radical polymerization initiator and a phosphorus compound. With the present process, the polymerization speed is very high and a monodisperse polymer of narrow molecular weight distribution can be obtained easily.