A kind of room temperature vulcanized silicone foam sealant with high temperature resistance and heat insulation and preparation method thereof

A technology of foam sealing and room temperature vulcanization, which is applied in the field of silicone sealants, can solve the problems of high temperature resistance, low thermal conductivity, and single product structure, and achieve the effects of low thermal conductivity, stable cell structure, and improved high temperature resistance

Active Publication Date: 2020-12-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although people have done a lot of research on silicone sealant foam materials, there are few products with high temperature resistance, low thermal conductivity, and simple and easy-to-operate foaming methods.
The performance of foamed silicone rubber mainly depends on cell size and cell density. However, due to the limitation of domestic technology, people have less research on the control process of cell structure type of room temperature dehydrogenated foamed silicone rubber, and the product structure is single. It is a closed-cell material, which is difficult to meet the needs, so we want to prepare a room temperature vulcanized foam sealant material with stable cell structure, good flame retardant and heat insulation performance

Method used

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  • A kind of room temperature vulcanized silicone foam sealant with high temperature resistance and heat insulation and preparation method thereof
  • A kind of room temperature vulcanized silicone foam sealant with high temperature resistance and heat insulation and preparation method thereof
  • A kind of room temperature vulcanized silicone foam sealant with high temperature resistance and heat insulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The silicone resin in Example 1 is MQ silicone resin, purchased from Shanghai Aishibo Organic Silicon Material Co., Ltd., model MVDQ-3, viscosity 7800mPa.s, vinyl content 3.13%;

[0062] The silicone resin in Examples 2 and 3 is a spiral-shaped silicon-titanium resin, which is self-made in the laboratory; the preparation method refers to the literature: Wu Jianhua. Synthesis and characterization of a spiral-shaped silicon-titanium resin [J]. China Adhesives, v. 26(11):1-4;

[0063] The silicon resin in the fourth and fifth examples is a cruciform silicon-titanium resin with benzene rings in the main chain, which is self-made in a laboratory, and is prepared with reference to Example 1 in CN103408763A;

[0064] Methyl hydrogen-containing silicone oil was purchased from Shandong Dayi Chemical Co., Ltd., and its molecular formula is: (CH 3 ) 3 SiO[(CH 3 )(H)SiO] n Si(CH 3 ) 3 , model DY-H202, hydrogen content is 1.6%;

[0065] The inhibitor was tetramethyltetravinyl...

Embodiment 1

[0069] A room temperature vulcanized silicone foam sealant, comprising A component and B component; wherein, A component includes the following raw materials in parts by weight:

[0070]

[0071] B component comprises the raw material of following weight portion:

[0072]

[0073] The preparation method of the above room temperature vulcanized silicone foam sealant comprises the following steps:

[0074] (1) Put quartz powder, carbon black, and zinc oxide into an oven, heat up to 100°C, and dry for 3 hours;

[0075] (2) Weigh the raw materials of component A according to the above ratio, put the raw materials except the inhibitor into the enamel dish for pre-mixing, then add the inhibitor to obtain component A;

[0076] (3) Take the raw materials of the B component according to the above proportioning ratio, put the raw materials except the platinum catalyst into the enamel dish for pre-mixing, then add the platinum catalyst to obtain the B component;

[0077] (4) Then...

Embodiment 2

[0081] A room temperature vulcanized silicone foam sealant, comprising A component and B component; wherein, A component includes the following raw materials in parts by weight:

[0082]

[0083] B component comprises the raw material of following weight portion:

[0084]

[0085] Refer to Example 1 for the preparation method of the above room temperature vulcanized silicone foam sealant.

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Abstract

The embodiment of the invention relates to the technical field of organosilicone sealants, in particular to a high-temperature-resistant and heat-insulating room-temperature-vulcanized organosiliconefoaming sealant and a preparation method thereof. The room-temperature vulcanized organic silicon foaming sealant provided by the invention comprises a component A and a component B. The sealant is stable and fine in foam structure, uniform and controllable in size, good in elasticity, low in thermal conductivity, good in high-temperature resistance, high in initial decomposition temperature and good in flame retardance. According to the preparation method of the room-temperature-vulcanized organic silicon foaming sealant, a chemical foaming process is adopted, so that the controllability of the reaction process is high, the operation process is simple, the cross-linking rate and the foaming rate can be regulated and controlled, and the cell structure is easier to control.

Description

technical field [0001] The invention relates to the technical field of organosilicon sealants, in particular to a high temperature-resistant and heat-insulating room temperature vulcanized organosilicon foam sealant and a preparation method thereof. Background technique [0002] Silicone sealant has been widely used and concerned because of its excellent high and low temperature resistance, weather resistance, electrical insulation and physiological inertia. The silicone foam sealant combines the advantages of ordinary silicone sealant materials and foam materials, not only has the excellent performance of the silicone sealant material itself, but also has the advantages of light weight, good damping effect and thermal insulation performance, and is widely used Used in aviation, aerospace, electronics, electrical appliances and other industrial sectors. [0003] Although people have done a lot of research on silicone sealant foam materials, there are few products with high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/05C08K3/36C08K3/22C08K3/04C08K3/34C08J9/06C08J3/24
CPCC08J3/246C08J9/0061C08J9/0066C08J9/06C08J2383/04C08J2483/04C08J2483/05C08J2483/07C08K3/04C08K3/34C08K3/36C08K2003/2296
Inventor 张孝阿单淑曦张猛杨莹江盛玲吕亚非王成忠
Owner BEIJING UNIV OF CHEM TECH
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