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A kind of thixotropic two-component silicone rubber foam sealant, preparation method and application thereof

A silicone rubber, two-component technology, used in adhesives, chemical instruments and methods, other chemical processes, etc., can solve the problems of low production efficiency, high viscosity of rubber, and decreased elasticity of sealing materials.

Active Publication Date: 2021-09-14
浙江清优材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silicone rubber used as a box sealant requires immediate setting after dispensing until it is completely cured to maintain the initial dispensing size and shape, that is, the glue is required to have high thixotropy, but ordinary silicone rubber is a Newtonian fluid before curing. No thixotropy, if it needs to be automatically formed and kept in shape after extrusion, the viscosity of the rubber material is often high, and the production efficiency is low, and the elasticity of the unfoamed sealing material after curing will decrease under long-term compression, and long-term use will The problem of box leakage
In view of this, the application of ordinary liquid silicone rubber sealing materials in the sealing of battery packs of box-powered vehicles has been greatly restricted

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0041] The present invention also provides a preparation method of a thixotropic two-component silicone rubber foam sealant, which is characterized in that it comprises the following steps:

[0042] (1) Weigh 100 parts of bulk silicone rubber, 0.5-5 parts of foaming agent, 1-5 parts of thixotropic agent, and 15-35 parts of flame retardant according to the mass parts of component A. Mix and stir for 60-90min at -150°C and vacuum degree of 0.095~0.099Mpa to make base material a;

[0043] (2) Let the base material a stand still, and after the base material a returns to 20-25°C, add 0.25~2 parts of catalyst to the base material a, stir and mix for 30 minutes at 20-25°C and vacuum degree of 0.095~0.099MPa -60min, make A component;

[0044] (3) Weigh 100 parts of liquid silicone rubber according to the mass of component B, add 15-25 parts of reinforcing agent into a planetary mixer, and mix and stir for 60- 90min, make base material b;

[0045] (4) Let base material b stand still...

Embodiment 1

[0050] (1) A thixotropic two-component silicone rubber foam sealant, including A component and B component, A component and B component are mixed according to the mass ratio of A:B=0.5:1; the A component Parts by weight include: 100 parts of liquid silicone rubber, 5 parts of foaming agent, 5 parts of thixotropic agent, 35 parts of flame retardant, and 0.25 parts of catalyst; the B component includes by weight: 100 parts of liquid silicone rubber, 25 parts of reinforcing agent, 5 parts of crosslinking agent, 0.5 parts of inhibitor.

[0051] (2) A thixotropic two-component silicone rubber foam sealing material, the preparation process of which is:

[0052] ① Weigh 100 parts of bulk silicone rubber, 5 parts of foaming agent, 5 parts of thixotropic agent and 35 parts of flame retardant according to the mass parts of component A. Stir for 90min to make base material a;

[0053] ②Let the base material a stand still, and after the base material a returns to 20°C, add 0.25 parts of...

Embodiment 2

[0058] (1) A thixotropic two-component silicone rubber foam sealant, including A component and B component, A component and B component are mixed according to the mass ratio of A:B=1:1; the A component Parts by weight include: 100 parts of liquid silicone rubber, 3 parts of foaming agent, 3 parts of thixotropic agent, 25 parts of flame retardant, and 0.5 parts of catalyst; the B component includes by weight: 100 parts of liquid silicone rubber, 20 parts of reinforcing agent, 3 parts of crosslinking agent, and 1 part of inhibitor.

[0059] (2) A thixotropic two-component silicone rubber foam sealing material, the preparation process of which is:

[0060] ① Weigh 100 parts of bulk silicone rubber, 3 parts of foaming agent, 3 parts of thixotropic agent, and 25 parts of flame retardant according to the mass parts of component A. Stir for 60 minutes to make base material a;

[0061] ②Let the base material a stand still, after the base material a returns to 23°C, add 0.5 part of c...

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Abstract

The present invention provides a thixotropic two-component silicone rubber foam sealant, which is characterized in that it includes component A and component B, and the ratio of component A and component B is A:B=0.5~5:1 The mass ratio is mixed; wherein, the A component includes by weight: 100 parts of liquid silicone rubber, 0.5-5 parts of foaming agent, 1-5 parts of thixotropic agent, 15-35 parts of flame retardant, and 0.25-5 parts of catalyst 2 parts; wherein, the B component includes by weight: 100 parts of liquid silicone rubber, 15-25 parts of reinforcing agent, 1-5 parts of cross-linking agent, and 0.5-2 parts of inhibitor.

Description

technical field [0001] The invention relates to a thixotropic two-component silicone rubber foam sealant, a preparation method and application thereof, belonging to the field of silicone rubber foam materials. Background technique [0002] As the core component of pure electric vehicles, the safety of power batteries directly affects the safety of the entire vehicle. The battery pack should first be developed to meet the design requirements of IP67 for the enclosure protection level of electrical equipment, so as to ensure that the battery pack is sealed and waterproof, and the battery pack will not be short-circuited due to water ingress. Therefore, the sealing and waterproofing of the battery pack is extremely important, which is directly related to the success or failure of the battery pack design. [0003] At present, the sealing material used for pack boxes is generally foam sheet or sealant. The advantage of foam material (foam sheet) is that it can be opened for main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/07C09J11/08C09J11/04C09J11/06C08J9/04C09K3/10H01M10/04
CPCC08J9/04C08J2383/07C08J2483/05C08J2483/07C08K2003/2224C08K2003/2227C08K2003/265C08K2003/387C08K2201/011C08L2201/02C08L2205/025C09J11/04C09J11/06C09J11/08C09J183/04C09K3/10C09K2003/1078H01M10/04C08L83/04C08K3/36C08K3/26C08K3/346C08K3/04C08K3/22C08K3/38C08K5/14Y02P70/50
Inventor 宋春亮施浩威高兰
Owner 浙江清优材料科技有限公司
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