Title:
ANIONIC RING-OPENING CONTINUOUS POLYMERIZATION PROCESS FOR CYCLOSILOXANE
Document Type and Number:
WIPO Patent Application WO/2024/055937
Kind Code:
A1
Abstract:
The present invention belongs to the field of preparation of organic silicon polymer materials, and particularly relates to an anionic ring-opening continuous polymerization process for cyclosiloxane. The process mainly comprises: allowing reaction materials to enter a heatable polymerization reactor of an externally connected vacuum device by means of a feeding pump; controlling the amount of a catalyst, the amount of an end-capping agent, and the polymerization reaction time according to a flow rate of the materials; selecting a polymerization reaction temperature according to the ring-opening reaction activity of a monomer; adjusting the vacuum degree according to the viscosity of polymerization reaction materials; and continuously discharging to obtain high-molecular-weight polysiloxane. The monomer in the present invention has a high conversion rate, which facilitates a subsequent small-molecule removal step and enables significant energy conservation and consumption reduction. The polymerization process is simple, in which steps of dehydration and purification as well as neutralization of the monomer are omitted, meanwhile, the equipment investment is small, which makes the process suitable for large-scale continuous production. The high-molecular-weight polysiloxane prepared by the present invention can be used as raw rubber of high-temperature vulcanized silicone rubber and can be applied to the fields of electronics, chemical engineering, metallurgy, architecture, aerospace, aviation, medical materials, and the like.
Inventors:
LI ZHIBO (CN)
LIU YUETAO (CN)
ZHAO NA (CN)
LIU YUETAO (CN)
ZHAO NA (CN)
Application Number:
PCT/CN2023/118055
Publication Date:
March 21, 2024
Filing Date:
September 11, 2023
Export Citation:
Assignee:
QINGDAO UNIV OF SCIENCE AND TECHNOLOGY (CN)
International Classes:
C08G77/08; C08G77/20; C08G77/24
Domestic Patent References:
| WO2018051792A1 | 2018-03-22 |
Foreign References:
| CN115286796A | 2022-11-04 | |||
| CN109280170A | 2019-01-29 | |||
| CN1259534A | 2000-07-12 | |||
| CN103122069A | 2013-05-29 | |||
| CN1303879A | 2001-07-18 | |||
| JPH0543694A | 1993-02-23 | |||
| US20100311922A1 | 2010-12-09 |
Attorney, Agent or Firm:
JINAN SHENGDA INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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