Title:
グラフト化ゴムのための押出方法
Document Type and Number:
Japanese Patent JP2011506659
Kind Code:
A
Abstract:
The invention relates to a process for producing a grafted rubber comprising:
a) providing an ethylene propylene rubber having a weight average molecular weight (Mw) of at least 80 kg/mol in a continuous extrusion reactor by feeding the rubber in a slab/melt dosing unit and transporting the rubber to the continuous extrusion reactor by a melt pump;
b) drying the rubber in the continuous extrusion reactor to a moisture content of between about 0.2 and about 0.5 wt%;
c) providing the dried rubber to a first injection zone of the continuous extrusion reactor at a temperature of between 190 and 250°C;
d) in the first injection zone, providing successively a first amount of maleic anhydride and a first free-radical initiator to the dried rubber;
e) reacting maleic anhydride with the rubber in a first reaction zone of the continuous extrusion reactor to produce a grafted rubber;
f) in a second injection zone, providing successively a second amount of maleic anhydride and a second free-radical initiator, the first and the second free radical initiator is an organic peroxide with a half-life (t ½ ) of more than 1 second if measured in mono-chlorobenzene at 220°C.
g) applying shear to the grafted rubber in a second reaction zone of the continuous extrusion reactor, the shear sufficient to reduce the weight average molecular weight (Mw) of the grafted rubber by a factor of at least 2.
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Inventors:
Miesen, Patrick
Houtwast, Franciscus, Victor, Pauls
Goesink, Johannes, Hendrick
Cue, joe
Houtwast, Franciscus, Victor, Pauls
Goesink, Johannes, Hendrick
Cue, joe
Application Number:
JP2010537376A
Publication Date:
March 03, 2011
Filing Date:
December 01, 2008
Export Citation:
Assignee:
DSM IP ASSETS B.V.
International Classes:
C08F8/46; B29C48/04; C08F210/16
Domestic Patent References:
| JPH07316239A | 1995-12-05 | |||
| JPH04132711A | 1992-05-07 |
Foreign References:
| WO2006039774A1 | 2006-04-20 |
Attorney, Agent or Firm:
Yuichi Yamada
Masakazu Noda
Yoshinori Shimizu
Ikeda adult
Masakazu Noda
Yoshinori Shimizu
Ikeda adult