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High-strength RTV-2 sealant and preparation method thereof

A technology of RTV-2 and sealant, which is applied in the direction of adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of low product strength, influence of glue performance, high equipment requirements, etc., to improve production Efficiency and product quality, fast curing speed, good elastic effect

Pending Publication Date: 2022-04-26
SHENZHEN VICTORY ON TRUST NEW MATERIAL TECHCO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The components A and B of the sealant can be freely mixed from 0.5:1 to 5:1, and the product can still maintain good final performance, which is suitable for popularization and application, but the product strength is low and needs to be improved
[0004] In addition, because the ratio of components A and B in the two-component is affected by the metering ratio of the equipment, the requirements for the equipment are high, and the deviation of the mixing ratio has a significant impact on the performance of the glue. Therefore, it is difficult to carry out large-scale quantitative production of two-component products at present. , there are certain limitations in application and promotion

Method used

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  • High-strength RTV-2 sealant and preparation method thereof
  • High-strength RTV-2 sealant and preparation method thereof

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Embodiment 1-4

[0032] Prepare raw materials according to the ingredients and ratios shown in Standard 1 (the ratio of each component is the mass percentage), and prepare high-strength RTV-2 sealant according to the following method:

[0033] (1) Preparation of reinforcing base glue: Mix simethicone and fumed silica in a vacuum kneader evenly, then add silane coupling agent, first knead at below 100°C, and then set the temperature to 140°C ℃ for high temperature kneading treatment, the vacuum degree is -0.1Mpa, the kneading time is 5h, and then transferred to the three-roll machine for grinding for 2 times, and finally dispersed evenly in vacuum to obtain the reinforcing base rubber;

[0034] (2) Preparation of component A: Mix A1, A2, A4 and A5 evenly with a power mixer, the revolution speed is 20Hz, the dispersion speed is 20Hz, then control the temperature of the material to not exceed 100°C and stir for 2 hours; cool the material When the temperature is below 40°C, add A3 again, set the rev...

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Abstract

The invention belongs to the technical field of organosilicon sealants, and discloses a high-strength RTV-2 sealant and a preparation method thereof. The high-strength RTV-2 sealant comprises a component A and a component B, the mixing ratio of the component A to the component B is (0.8-1.2): (0.8-1.2), and the component A comprises A1 polydimethylsiloxane, A2 reinforcing base glue, A3 plasticizer, A4 inorganic filler and A5 color paste; and the component B comprises B1 polydimethylsiloxane, B2 reinforcing base rubber, B3 plasticizer, B4 inorganic filler, B5 cross-linking agent, B6 tackifier and B7 catalyst. The mixing ratio of the component A to the component B in the sealant can be 1: 1, the sealant is easy to match and use, and even if a certain deviation exists during mixing, the influence on the performance of the sealant is small. In addition, the sealant has high curing speed, high strength and good elasticity, and is suitable for being applied to the field of rapid bonding sealing with high strength requirements.

Description

technical field [0001] The invention relates to the technical field of silicone sealants, in particular to a high-strength RTV-2 sealant and a preparation method thereof. Background technique [0002] Since the introduction of organosilicon materials in the middle of the 20th century, my country's organosilicon material industry has developed vigorously, and its output and sales have continued to grow rapidly. Liquid silicone rubber has become one of the most promising products in the organosilicon industry. It is widely used in construction, The pillar industries of the national economy such as automobiles, electronics, aviation and machinery. Among them, the room temperature condensation type two-component (RTV-2) liquid silicone rubber not only has the characteristics of high and low temperature resistance, aging resistance, chemical corrosion resistance, and electrical insulation that the room temperature condensation type one-component (RTV-1) liquid silicone rubber has....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/08
CPCC09J183/04C09J11/04C09J11/08C08L83/04C08K7/26C08K9/06
Inventor 郑玉娜
Owner SHENZHEN VICTORY ON TRUST NEW MATERIAL TECHCO LTD
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