Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of room-temperature cured high-temperature-resistant organic silicon adhesive

A room temperature curing, silicone adhesive technology, applied in the preparation of silicone adhesives, high temperature and aging resistant room temperature curing silicone adhesives, can solve the problem of heat resistance decline, sealant hardness, mechanical properties and adhesive performance decline, The colloid loses its elasticity and bonding ability, etc.

Active Publication Date: 2019-11-22
武汉双键新材料股份有限公司
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the silicon-oxygen chain segment is easily degraded at a high temperature of 250°C and above, it will cause the breakage and rearrangement of the silicon-oxygen bond, resulting in a decrease in the hardness, mechanical properties and adhesive properties of the sealant.
At a temperature of 300°C and above, the use value of sealing and bonding is basically lost
[0006] Ferrocene powder is directly introduced into the silicone adhesive system. After one day of continuous high-temperature aging at 300°C, compared with the silicone adhesive without ferrocene powder, the heat resistance has been significantly improved. The basic physical and mechanical properties before and after high temperature There is little change in performance, but after continuous high-temperature aging at 300°C and above for a week or even longer, the heat resistance will still decline significantly, and the colloid will completely lose its elasticity and bonding ability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of room-temperature cured high-temperature-resistant organic silicon adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method provided in this example is as follows: pour 50 g of ferrocene lithium salt into a beaker, add 100 mL of toluene, stir to dissolve and set aside. Add 100 g of a mixture of methyltrichlorosilane and methyltrimethoxysilane, 100 mL of methanol into the flask, turn on nitrogen and stir. At room temperature, the toluene solution of the completely dissolved lithium ferrocene salt was dropped into the flask, and the dropping time was controlled to be 1 h. After the dropwise addition, react at room temperature for 3 h, and filter off the residue. Add 100mL of toluene and 35mL of pure water into the flask, mix the resulting product solution with 120g of a mixture of methyltrichlorosilane and methyltrimethoxysilane, and 50mL of methanol, and slowly drop it into the flask, controlling the dropping time for 3h. After the dropwise addition, the temperature was raised to 90°C, condensed and refluxed for 5 hours, cooled to room temperature, and the water layer ...

Embodiment 2

[0033] The preparation method provided in this example is as follows: pour 80 g of ferrocene chloride into a beaker, add 80 mL of toluene, stir to dissolve and set aside. Add 80 g of a mixture of dimethyldichlorosilane and trimethoxysilane, 80 mL of methanol to the flask, turn on nitrogen and stir. At room temperature, the toluene solution of the completely dissolved ferrocene chloride was dropped into the flask, and the dropping time was controlled to be 1 h. After the dropwise addition, react at room temperature for 5 h, and filter off the residue. Add 80mL of toluene and 30mL of pure water into the flask, mix the resulting product solution with 110g of a mixture of dimethyldichlorosilane and dimethyldimethoxysilane, and 50mL of methanol, and slowly drop them into the flask, controlling the dropping time for 3h . After the dropwise addition, raise the temperature to 90°C, condense and reflux for 6 hours, cool to room temperature, separate the water layer, neutralize the oi...

Embodiment 3

[0036] The preparation method provided in this example is as follows: pour 60 g of ferrocene ethanol into a beaker, add 100 mL of toluene, stir to dissolve and set aside. Add 100 g of tetrachlorosilane and methyl orthosilicate mixture, 100 mL of methanol into the flask, turn on nitrogen and stir. At room temperature, the completely dissolved ferrocene ethanol solution in toluene was dropped into the flask, and the dropping time was controlled to be 1 h. After the dropwise addition, react at room temperature for 8 h, and filter off the residue. Add 100mL of toluene and 35mL of pure water into the flask, mix the obtained product solution with 120g of tetrachlorosilane and methyl orthosilicate mixture, and 50mL of methanol, slowly drop into the flask, and control the dropping time for 3h. After the dropwise addition, raise the temperature to 90°C and reflux for 8 hours, cool to room temperature, separate the water layer, neutralize the oil layer with 10g of ammonium bicarbonate ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a room-temperature cured high-temperature-resistant organic silicon adhesive. The preparation method comprises the following steps: preparing ferrocene polysiloxane, sequentially adding hydroxyl-terminated polydimethylsiloxane, a filler, a water removal agent, an end-capping reagent, polysiloxane ferrocene and an end-capping catalyst into a reaction kettle, starting stirring and vacuum, heating to a water removal reaction temperature, keeping the temperature for a period of time, heating to an end-capping reaction temperature, and keeping the temperature to react for a period of time; and cooling to room temperature, sequentially adding a cross-linking agent and a coupling agent into the kettle, fully and uniformly mixing, adding an organic metal catalyst, uniformly mixing, carrying out vacuum breaking by using nitrogen, discharging and packaging. According to the preparation method, a ferrocene group is introduced into a siloxane chain segment through silane oxidation of ferrocene, so that the temperature resistance of the adhesive is improved, and good mechanical strength and bonding performance can be kept under the action of continuous high temperature of 300 DEG C or above for a long time.

Description

technical field [0001] The invention provides a method for preparing a silicone adhesive, in particular to a method for preparing a high temperature and aging resistant room temperature curing silicone adhesive, which belongs to the technical field of silicone adhesive preparation. Background technique [0002] Room temperature curing silicone adhesive is a high molecular polymer formed by hydrolysis and condensation under humid conditions. It can be divided into a variety of types according to the different types of reactions. It is widely used in various industries such as construction, industry, and electronics. Applications. [0003] Room temperature curing silicone adhesive is a type of polysiloxane polymer with adhesiveness and sealing properties. The main structure is a linear, crosslinked or cyclic silicone polymer. The bond energy of the silicon-oxygen bond in the main chain is far Higher than polymers with carbon-carbon chains as the backbone, so siloxane polymers...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J183/08C09J11/04C09J11/06C08G77/22C08G77/16
CPCC08G77/16C08G77/22C08K2003/265C08K2201/011C08L2201/08C08L2205/025C08L2205/03C09J11/04C09J183/04C08L83/04C08L83/08C08K3/26
Inventor 孙雨声张喆朗珂洪建徐成华刘永刚雷木生游仁国
Owner 武汉双键新材料股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com