Title:
ULTRA-LOW VISCOSITY LIQUID SILICONE RUBBER, CROSS-LINKING AGENT THEEREFO, AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/035283
Kind Code:
A1
Abstract:
An ultra-low viscosity liquid silicone rubber, a crosslinking agent, and a preparation method, which are particularly suitable for application scenarios requiring ultra-low viscosity, such as slit casting and 3D printing, and belong to the technical field of silicone rubber. The in-situ polymerization liquid silicone rubber comprises a cyclosiloxane, a cross-linking agent, and a catalyst; the cross-linking agent uses a cyclosiloxane containing Si-CH＝CH2 and a linear polysiloxane having Si-H at both ends as monomers for reaction, and hydrosilylation is performed to prepare a "dumbbell-shaped" molecule both ends of which are cyclic siloxane. The cross-linking agent can be in-situ copolymerized with the cyclosiloxane to directly form a cross-linked elastomer, and the cross-linking density, the cross-linking speed, and the like of the silicone rubber can be controlled by adjusting the amount of the cross-linking agent, the reaction conditions, and so on. The entire system has the characteristics of low viscosity, controllable cross-linking, and convenient operation. In addition, the ultra-low viscosity liquid silicone rubber prepared by using the described method has low viscosity, short curing time, good environmental adaptability and thermal stability, and has better mechanical properties.
Inventors:
ZHOU CHUANJIAN (CN)
SU WENLU (CN)
SU WENLU (CN)
Application Number:
PCT/CN2021/118308
Publication Date:
March 16, 2023
Filing Date:
September 14, 2021
Export Citation:
Assignee:
UNIV SHANDONG (CN)
WEIHAI INSTITUTE OF INDUSTRIAL TECHNOLOGY SHANDONG UNIV (CN)
SHANDONG RESEARCH INSTITUTE OF INDUSTRIAL TECH (CN)
WEIHAI INSTITUTE OF INDUSTRIAL TECHNOLOGY SHANDONG UNIV (CN)
SHANDONG RESEARCH INSTITUTE OF INDUSTRIAL TECH (CN)
International Classes:
C08G77/08; C08G77/20; C08G77/24; C08L83/07; C08L83/08
Domestic Patent References:
| WO2020053357A1 | 2020-03-19 |
Foreign References:
| CN106753217A | 2017-05-31 | |||
| US20030229174A1 | 2003-12-11 | |||
| CN1081444A | 1994-02-02 | |||
| CN103524743A | 2014-01-22 | |||
| CN104672455A | 2015-06-03 |
Other References:
ZHDANOV, A. A. ET AL.: "A STUDY OF THE POLYMERIZATION OF BICYCLOCARBOSILOXANES BY CALORIMETRY AND 29Si NMR", POLYMER SCIENCE U.S.S.R., vol. 29, no. 3, 31 December 1987 (1987-12-31), pages 638 - 645, XP024131853, DOI: 10.1016/0032-3950(87)90274-7
ZHDANOV, A. A. ET AL.: "SYNTHESIS OF METHYLPHENYLBICYCLOCARBOSILOXANES AND STUDY OF THEIR PROPERTIES", BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR, DIVISION OF CHEMICAL SCIENCES., SPRINGER NEW YORK LLC, US, vol. 34, no. 2, 31 December 1985 (1985-12-31), US , pages 397 - 400, XP009544341, ISSN: 0568-5230
DE VEKKI, D. A. ET AL.: "A STUDY OF THE METAL COMPLEX CATALYZED HYDROSILYLATION OF VINYL- WITH HYDROSILOXANES (A REVIEW)", BULLETIN OF THE SAINT PETERSBURG STATE INSTITUTE OF TECHNOLOGY (TECHNICAL UNIVERSITY), vol. 19, no. 45, 31 December 2013 (2013-12-31), pages 97 - 114
ZHDANOV, A. A. ET AL.: "SYNTHESIS OF METHYLPHENYLBICYCLOCARBOSILOXANES AND STUDY OF THEIR PROPERTIES", BULLETIN OF THE ACADEMY OF SCIENCES OF THE USSR, DIVISION OF CHEMICAL SCIENCES., SPRINGER NEW YORK LLC, US, vol. 34, no. 2, 31 December 1985 (1985-12-31), US , pages 397 - 400, XP009544341, ISSN: 0568-5230
DE VEKKI, D. A. ET AL.: "A STUDY OF THE METAL COMPLEX CATALYZED HYDROSILYLATION OF VINYL- WITH HYDROSILOXANES (A REVIEW)", BULLETIN OF THE SAINT PETERSBURG STATE INSTITUTE OF TECHNOLOGY (TECHNICAL UNIVERSITY), vol. 19, no. 45, 31 December 2013 (2013-12-31), pages 97 - 114
Attorney, Agent or Firm:
BEIJING JUNHUI INTELLECTUAL PROPERTY AGENT OFFICE (ORDINARY PARTNERSHIP) (CN)
Download PDF: