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Antistatic liquid silicone rubber and preparation method thereof

A liquid silicone rubber and antistatic technology, which is applied in the field of antistatic liquid silicone rubber and its preparation, can solve the problem of failure to achieve comprehensive physical properties such as tensile strength, elongation at break, tear strength, etc., and the inability to balance physical strength and fluidity , unhealthy operators and other issues, to achieve the effect of changing the processing performance, physical machinery and weather resistance, excellent comprehensive physical properties, and reducing the difficulty of recycling

Pending Publication Date: 2022-05-13
镇江高美新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the liquid silicone rubber material itself is insulating, it must add a certain proportion of conductive additives to obtain antistatic or electrical conductivity.
At present, the commonly used conductive additive is acetylene carbon black. Because of its low conductivity, it needs to be used in large quantities to achieve the effect. In addition, acetylene carbon black is difficult to disperse during the production process, and it is easy to generate dust, which affects the environment and is not good for the health of operators.
In addition, when used in liquid silicone rubber materials, physical strength and fluidity cannot be taken into account. Under a certain hardness standard, the requirements for comprehensive physical properties such as tensile strength, elongation at break, and tear strength cannot be met, and it is difficult to meet Applications in some demanding fields

Method used

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  • Antistatic liquid silicone rubber and preparation method thereof
  • Antistatic liquid silicone rubber and preparation method thereof
  • Antistatic liquid silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This example is an antistatic liquid silicone rubber and its preparation method. Through the optimization of the formula and the control of the preparation process, an antistatic liquid silicone rubber with both physical strength and fluidity can be obtained, which can not only reduce the frequency of equipment failures, Moreover, its superior weather resistance and fatigue resistance can greatly improve the service life of the equipment.

[0062] The antistatic liquid silicone rubber described in this embodiment includes the following components in parts by weight: 100 parts of vinyl polydimethylsiloxane compound, 22 to 44 parts of modified reinforcing agent, modified conductive material 2-5 parts, platinum catalyst 0.2-0.5 parts, hydrogen-containing crosslinking agent 2-5 parts, polymerization inhibitor 0.02-0.05 parts, purified water 1-2 parts. in:

[0063] In order to meet the physical strength of liquid silicone rubber and take into account certain fluidity requir...

Embodiment 2

[0077] This example is to verify the necessity of selecting vinyl polydimethylsiloxane compound in order to satisfy the physical strength of liquid silicone rubber and take into account the fluidity of silicone rubber proposed in Implementation 1. In this implementation, the influence of using one kind of vinyl polydimethylsiloxane and a variety of vinyl polydimethylsiloxanes with different viscosities and different vinyl contents on the comprehensive performance of the rubber compound is compared. Concrete formulation is as shown in Table 1:

[0078] Table I:

[0079]

[0080] According to the formula in Table 1, the liquid silicone rubber base rubber was prepared according to the preparation method step S1 in Example 1, and its physical strength and fluidity were tested. The results are shown in Table 2:

[0081] Table II:

[0082] Performance unit Recipe 01 Recipe 02 Recipe 03 Recipe 04 Recipe 05 viscosity mPa 150000 180000 280000 220000...

Embodiment 3

[0085] This embodiment is to verify that the specific surface area of ​​modified fumed silica used in Example 1 improves the physical strength and fluidity of liquid silicone rubber. This embodiment uses fumed silica with different specific surface areas to test different The impact of the specification of fumed silica on the comprehensive performance of liquid silicone rubber, the design formula is shown in Table 3:

[0086] Table three:

[0087]

[0088] According to the formula in Table 3, the liquid silicone rubber base was also prepared according to the preparation method step S1 in Example 1, and its physical strength and fluidity were tested. The results are shown in Table 4:

[0089] Table four:

[0090] Performance unit Recipe 06 Recipe 07 Recipe 08 viscosity mPa 195000 230000 320000 hardness Shaw A 40 40 42 tensile strength MPa / m 2

[0091] It can be seen from the above table that the viscosity and tensile strength of t...

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Abstract

The invention discloses antistatic liquid silicone rubber and a preparation method thereof. The antistatic liquid silicone rubber comprises the following components in parts by weight: 100 parts of a vinyl polydimethylsiloxane compound, 22-44 parts of a modified reinforcing agent, 2-5 parts of a modified conductive material, 0.2-0.5 part of a platinum catalyst, 2-5 parts of a hydrogen-containing cross-linking agent, 0.02-0.05 part of a polymerization inhibitor and 1-2 parts of purified water, wherein the vinyl polydimethylsiloxane compound is formed by compounding two or more kinds of vinyl polydimethylsiloxane with different viscosities and vinyl content specifications; the modified reinforcing agent is modified fumed silica, and the structured treatment agent for modification of the modified reinforcing agent is hexamethyl disilazane and dimethyl dimethoxy silane; the modified conductive material is one or more of acetylene carbon black, carbon fibers or carbon nanotubes modified by silane. The antistatic liquid silicone rubber prepared by the invention has excellent antistatic performance, and not only can reduce the operation failure frequency of equipment, but also can prolong the service life of the equipment.

Description

technical field [0001] The invention relates to an antistatic liquid silicone rubber and a preparation method thereof. Background technique [0002] With the rapid development of industrial Internet applications, the degree of industrial automation continues to increase, and the speed of equipment operation is getting faster and faster. In the industrial production process, static electricity problems often cause equipment operation failures, parking, and even static sparks to cause safety hazards. How to eliminate or guide the static electricity generated in the production process in time, while fully grounding the facilities, using antistatic materials to eliminate static electricity in time is the best solution. [0003] Silicone rubber is a polymer elastic material with both inorganic and organic properties. Its molecular main chain is composed of silicon atoms and oxygen atoms alternately (-Si-O-Si-), and the side chains are hydrocarbons connected to silicon atoms. Or ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K7/26C08K9/06C08K3/04C08K7/06C08K13/06
CPCC08L83/04C08K7/26C08K9/06C08K3/041C08L2201/04C08K3/04C08K7/06C08K13/06
Inventor 王超欧金海
Owner 镇江高美新材料有限公司
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