Title:
A polymer and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6175769
Kind Code:
B2
Abstract:
The time when at least a monomer and a chain transfer agent are supplied in a reactor and the solution temperature in the reactor has reached a predetermined polymerization temperature is set as starting time (T0), and the time when a process to terminate the polymerization is started is set as ending time (T1). A polymerization initiator is supplied into the reactor between (T0) and just before [(T1)−(T0)/2] and between [(T1)−(T0)/2] and (T1). The total mass of the polymerization initiator supplied to the reactor between (T0) and (T1) is set as (IA), and the total mass of the polymerization initiator supplied between [(T0−T1)/2] and (T1) is set as (IB). The (IA) is set 50 to 100 mass % of the entire polymerization initiator. Using a production method in which 0.50<(IB)/(IA)<1.00 is satisfied, a polymer is produced at a high polymerization rate showing less variation of molecular weight and having less amount of chain transfer agent residue remaining at an end of the polymer chain.
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Inventors:
Oshikiri Tomoya
Atsushi Yasuda
Atsushi Yasuda
Application Number:
JP2012530001A
Publication Date:
August 09, 2017
Filing Date:
May 30, 2012
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
C08F220/28; C08F2/38; G03F7/039
Domestic Patent References:
| JP2008268661A | ||||
| JP2005156726A | ||||
| JP2007065504A | ||||
| JP2009009114A | ||||
| JP2004501249A | ||||
| JP2002241568A | ||||
| JP2010100744A | ||||
| JP2003212912A | ||||
| JP2002508409A |
Foreign References:
| US20040097674 |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Suzuki Mitsuyoshi
Tadashi Takahashi
Suzuki Mitsuyoshi