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A kind of viscosifier of fluorosilicone rubber and silicone rubber and its preparation method and application

A technology of fluorosilicone rubber and tackifier, applied in the field of rubber materials, can solve the problems of low efficiency, flammable solvents, explosive and toxic substances, etc.

Active Publication Date: 2017-07-21
新元化学(山东)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this kind of primer generally needs to wait until the solvent is completely volatilized before proceeding to the bonding construction, and the efficiency is low. Some manufacturing processes, especially continuous production processes, cannot be used.
In addition, solvents are often flammable, explosive and may have certain toxic substances, which are harmful to the environment and the health of workers

Method used

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  • A kind of viscosifier of fluorosilicone rubber and silicone rubber and its preparation method and application
  • A kind of viscosifier of fluorosilicone rubber and silicone rubber and its preparation method and application
  • A kind of viscosifier of fluorosilicone rubber and silicone rubber and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] A tackifier for fluorosilicone rubber and silicone rubber has the following structural formula:

[0098] ViMe 2 SiO(Me 2 SiO) 30 (MeViSiO) 15 [CF 3 CH 2 CH 2 Si(Me)O] 32 SiMe 2 Vi

[0099] The preparation steps are as follows:

[0100] (1) drop into 500g three (trifluoropropyl) trimethylcyclotrisiloxane (D 3 F ), 222g octamethylcyclotetrasiloxane), 129g tetramethyltetravinylcyclotetrasiloxane (D 4 Vi ), heated to 60°C and dehydrated for 2.5 hours under the condition of vacuum degree of -0.08MPa;

[0101] (2) Then add 19g of 1,3-divinyl-1,3-tetramethyldisiloxane into the reactor, and finally add 80ppm of KOH to raise the temperature to 150°C, and maintain the reaction for 3 hours;

[0102] (3) Then add 2.05g of phosphoric acid gum with a concentration of 4wt% to neutralize. Under a vacuum of -0.095MPa, raise the temperature to 200°C to remove small molecules with low boiling points, and cool down to room temperature to obtain 662g of the product.

[0103] ...

Embodiment 2

[0105] A tackifier for fluorosilicone rubber and silicone rubber has the following structural formula:

[0106] ViMe 2 SiO (MeViSiO) 10 [CF 3 CH 2 CH 2 Si(Me)O] 48 SiMe 2 Vi

[0107] (1) Add 750g tri(trifluoropropyl)trimethylcyclotrisiloxane (D 3 F ), 86g tetramethyltetravinylcyclotetrasiloxane (D 4 Vi ), heated to 60°C and dehydrated for 2.5 hours under the condition of vacuum degree of -0.08MPa;

[0108] (2) Then add 19g of 1,3-divinyl-1,3-tetramethyldisiloxane into the reaction kettle, and finally add 80ppm of KOH to raise the temperature to 150°C and maintain the reaction for 3 hours;

[0109] (3) Add 2.10 g of phosphoric acid gum with a concentration of 4 wt% to neutralize it, and raise the temperature to 200°C under a vacuum of -0.1 MPa1 to remove small molecules with low boiling points, and cool down to room temperature to obtain 662 g of the product.

[0110] Viscosity at 25°C is 780mPa-s. through 1 According to H-NMR, the content of methyl trifluoropropyl ...

Embodiment 3

[0112] A tackifier for fluorosilicone rubber and silicone rubber has the following structural formula:

[0113] ViMe 2 SiO(Me 2 SiO) 168 (MeViSiO) 22 [CF 3 CH 2 CH 2 Si(Me)O] 180 SiMe 2 Vi

[0114] The preparation steps are as follows:

[0115] (1) drop into 1403g three (trifluoropropyl) trimethylcyclotrisiloxane (D 3 F ), 622g octamethylcyclotetrasiloxane), 95g tetramethyltetravinylcyclotetrasiloxane (D 4 Vi ), heated to 60°C and dehydrated for 2.5 hours under the condition of vacuum degree of -0.08MPa;

[0116] (2) Then add 10g of 1,3-divinyl-1,3-tetramethyldisiloxane into the reaction kettle, and finally add 80ppm of KOH to raise the temperature to 150°C and maintain the reaction for 3 hours;

[0117] (3) Then add 2.10g of phosphoric acid gum with a concentration of 4wt% to neutralize. Under a vacuum above -0.1MPa, heat up to 200°C to remove small molecules with low boiling points, and cool down to room temperature to obtain 662g of product.

[0118] Viscosit...

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Abstract

The invention relates to a tackifier for fluorosilicone rubber and silicone rubber and application and a preparation method thereof. The tackifier is shown as the following general formula: R<1>3SiO(R<2>2SiO)n[(R<F>-R<CH>)Si(R<3>)O]m(R<4>2SiO)xSiR<5>3, wherein R1, R2, R3, R4 and R5 are the same or different, are saturated or unsaturated, and are monovalent hydrocarbon groups with 1-14 carbon atoms; RF is a fluorinated alkyl group with 1-8 carbon atoms; RCH is a divalent hydrocarbon group with 2-6 carbon atoms, or ether or thioether with 2-6 carbon atoms; when RCH is ether or thioether, sulfur atoms and oxygen atoms are only bonded to the carbon atoms; the general formula contains at least two alkenyl groups. The fluorosilicone rubber and the silicone rubber can be bound by a bonding method provided by the invention, and the bonding strength is high; no precious metal catalyst is used, so that the cost is low; the bonding speed is quick; the bonding efficiency is high; the tackifier for fluorosilicone rubber and silicone rubber is environment-friendly and free from pollution.

Description

technical field [0001] The invention relates to a viscosifier for fluorosilicone rubber and silicone rubber, a preparation method and application thereof, and belongs to the technical field of rubber materials. Background technique [0002] The base polymer of fluorosilicone rubber has the same linear main chain structure of -Si-O-Si- as the base polymer of ordinary silicone rubber, so fluorosilicone rubber, like silicone rubber, has good heat resistance and cold resistance. And because a large part of the silicon atoms or almost all of the silicon atoms in the molecular chain of fluorosilicone rubber are connected with fluorinated alkyl groups, it has the properties of chemical corrosion resistance and oil resistance that cannot be compared with ordinary silicone rubber. Therefore, fluorosilicone rubber compositions are widely used in industrial fields such as automobiles, aviation, aerospace, petrochemical and environmental protection. However, a major problem with fluoro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08L83/07C08L83/06C08K3/36C08K5/14C08K3/22C08G77/24C08G77/06C08J5/12
Inventor 张殿松解乐福于鹏飞胡百廷侯志伟
Owner 新元化学(山东)股份有限公司