Title:
METHOD FOR CONTROLLING MOONEY VISCOSITY OF PEROXIDE VULCANIZED FLUORORUBBER
Document Type and Number:
WIPO Patent Application WO/2022/000725
Kind Code:
A1
Abstract:
A method for controlling the Mooney viscosity of a peroxide vulcanized fluororubber, comprising: in the polymerization process of a peroxide vulcanized fluororubber, using a continuous supplementation mode to add an initiator solution, and continuing the supplementation until 5-10 minutes before the end of the polymerization reaction, wherein the addition amount of the initial initiator solution is 0.1-0.5% of the total amount of a polymerized monomer dry material; the amount of the continuously supplemented initiator solution is 0.1-2% of the polymerized monomer dry material. By controlling the addition amount and the addition mode of the initiator, the Mooney viscosity value of the peroxide vulcanized fluororubber is effectively controlled within the expected range, and has small fluctuations. A peroxide vulcanized fluororubber having a controllable and stable quality is obtained without adding a chain transfer agent, which reduces the amount of assistants in the polymerization process, improves the reaction activity of a polymerization system, effectively shortens the polymerization time, and is beneficial to industrial production.
Inventors:
YU JINLONG (CN)
LIU BO (CN)
ZHONG ZIQIANG (CN)
ZHANG TINGJIAN (CN)
XIAO ZHONGLIANG (CN)
LIU BO (CN)
ZHONG ZIQIANG (CN)
ZHANG TINGJIAN (CN)
XIAO ZHONGLIANG (CN)
Application Number:
PCT/CN2020/109529
Publication Date:
January 06, 2022
Filing Date:
August 17, 2020
Export Citation:
Assignee:
ZHONGHAO CHENGUANG RES INSTITUTE OF CHEMICAL INDUSTRY CO LTD (CN)
International Classes:
C08F14/18
Foreign References:
| CN102443090A | 2012-05-09 | |||
| CN1687148A | 2005-10-26 | |||
| CN101195669A | 2008-06-11 | |||
| CN102786700A | 2012-11-21 | |||
| CN101186662A | 2008-05-28 | |||
| CN101081887A | 2007-12-05 | |||
| US6458883B1 | 2002-10-01 |
Other References:
JIN DONG , CUI XIAOMING: "Production modification and processing technology progress of fluororubber", ORGANO-FLUORINE INDUSTRY, no. 3, 15 September 2009 (2009-09-15), pages 48 - 51, XP055883949
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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