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Polysiloxane resin with lateral group containing alkoxyl, producing method and use of the same

A technology of polysiloxane resin and side groups containing alkanes, which is applied in chemical instruments and methods, other chemical processes, coatings, etc., can solve the problems of low mechanical strength of cross-linked products, and achieve excellent high temperature resistance and good durability. The effect of chemical corrosion performance

Inactive Publication Date: 2008-04-02
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dealcohol-type cross-linking agents currently use mainly trifunctional or tetrafunctional alkoxysilanes, such as small molecule compounds such as ethyl orthosilicate, methyltrimethoxysilane, and methyltriethoxysilane. The disadvantages are The mechanical strength of the cross-linked product is low

Method used

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  • Polysiloxane resin with lateral group containing alkoxyl, producing method and use of the same
  • Polysiloxane resin with lateral group containing alkoxyl, producing method and use of the same
  • Polysiloxane resin with lateral group containing alkoxyl, producing method and use of the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of polysiloxane resin (PMOS) containing methoxy group in side group:

[0039] Raw materials: methyl hydrogen-containing silicone oil with a hydrogen content of 1.6mol / 100g; methanol as the alcohol; tetrahydrofuran as the solvent; tetramethylammonium hydroxide as the catalyst.

[0040] Conditions: Add 100g of methyl hydrogen-containing silicone oil, 52g of methanol, 100g of tetrahydrofuran, and 1.0g of tetramethylammonium hydroxide into a three-necked flask, and react for 3 hours at a reaction temperature of 0°C.

[0041] The synthetic product is liquid at room temperature, and it is characterized by infrared. Compared with the infrared spectrum of the raw material methyl hydrogen-containing silicone oil, the 2173cm -1 The characteristic peak at disappears, indicating that the Si-H group is reacted; 2841cm -1 A new characteristic peak appears at , indicating that there is Si-OCH 3 Group generation. Perform on PMOS 29 Si NMR characterization, compared with t...

Embodiment 2

[0046] Preparation of polysiloxane resin (PEOS) containing ethoxy groups in side groups:

[0047] Raw materials: methyl hydrogen-containing silicone oil with a hydrogen content of 0.09mol / 100g; ethanol is selected as alcohol; toluene is selected as solvent; basic ion exchange resin is selected as catalyst.

[0048] Conditions: Add 100g of hydrogen-containing silicone oil, 5g of ethanol, 200g of toluene, and 5.0g of basic ion exchange resin into a three-necked flask, and react for 17 hours at a reaction temperature of 60°C.

[0049] The synthesized product is liquid at room temperature, and it is characterized by infrared. Compared with the infrared spectrum of the raw material methyl hydrogen-containing silicone oil, the 2173cm -1 The characteristic peak at disappears, indicating that the Si-H group is reacted; 920cm -1 A new characteristic peak appears at , indicating that there is Si-OCH 2 CH 3 Group generation. The above infrared characterization shows that under the pr...

Embodiment 3

[0053] Preparation of polysiloxane resin (PMOS) containing methoxy group in side group:

[0054] Raw materials: methyl hydrogen-containing silicone oil, hydrogen content is 1.66mol / 100g; methanol is selected as alcohol; acetone is selected as solvent; copper powder is selected as catalyst.

[0055] Conditions: Add 100g of methyl hydrogen-containing silicone oil, 60g of methanol, 100g of acetone, and 4.0g of copper powder into a three-necked flask, and react for 20 hours at a reaction temperature of 50°C.

[0056] The synthetic product is liquid at room temperature, and it is characterized by infrared. Compared with the infrared spectrum of the raw material methyl hydrogen-containing silicone oil, the 2173cm -1 The characteristic peak at disappears, indicating that the Si-H group is reacted; 2841cm -1 A new characteristic peak appears at , indicating that there is Si-OCH 3 Group generation. Perform on PMOS 29 Si NMR characterization, compared with the NMR spectrum of the ra...

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Abstract

The present invention provides a polysiloxane resin (PAOS) containing a side group with alkoxy, the preparation method and application. The methyl silicone containing hydrogen, alcohol, solvent and catalyst are used to prepare PAOS under certain conditions. The PAOS can react with water in the air at the room temperature or under heated conditions; the liquid state is changed into the solid state to form the sealing material matrix resin with no foam at a high temperature and of chemical corrosion resistance and high-temperature resistance; the solidification method is simple and easy for scene use; the PAOS also can be used as crosslinker for hydroxy-terminated polysiloxane; the PAOS has the enhancing function in situ while crosslinking. The present invention has good application prospects in high-temperature resistant composite materials, such as matrix resin, coating, adhesive, sealant, crosslinker and so on.

Description

Technical field: [0001] The invention relates to a polysiloxane resin with side groups containing alkoxy groups, a preparation method and application thereof. Background technique: [0002] With the development of high-speed and high-integration industries such as aviation, aerospace, and electronics, people have higher and higher requirements for high-temperature-resistant sealing materials, such as requiring materials that do not foam at high temperatures, and materials that are chemically resistant Corrosion requires that the material curing process is simple and can be cured on site to meet construction needs. [0003] At present, the high temperature resistant sealing materials used at home and abroad are divided into organic-inorganic hybrid sealing materials and inorganic sealing materials. [0004] High-temperature resistant inorganic sealing materials can be divided into four types at present: air-dry type, water-solid type, hot-melt type and reactive type. Althoug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/14C08G77/48C09K3/10C08L83/04C09D183/04C09J183/04
Inventor 张军营韩雁明史翎
Owner BEIJING UNIV OF CHEM TECH
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