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A kind of environment-friendly flame-retardant silicone sealant and preparation method thereof

A silicone sealant, environmentally friendly technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of penetration, degradation of polymer performance, affecting storage and use, etc., to achieve stable storage, Good adhesion effect

Active Publication Date: 2018-05-29
HUBEI XINGRUI SILICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Additive flame retardants such as aluminum hydroxide and magnesium hydroxide are non-toxic, smoke-free and cheap, but the particle size of aluminum hydroxide and magnesium hydroxide powder has an impact on the flame retardancy and filling properties of silicone sealants Larger, there are problems such as uneven mixing or agglomeration, resulting in poor bonding with the polymer, resulting in a decrease in the performance of the polymer
[0004] Halogen flame retardants have a good flame retardant effect in sealants, but when burned, they not only release a lot of smoke, but also release toxic substances, which have a bad impact on the environment
[0005] Phosphorus-based flame retardants have poor compatibility with polysiloxane, and when added to sealants, problems such as delamination and penetration will occur, which will affect their storage and use

Method used

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  • A kind of environment-friendly flame-retardant silicone sealant and preparation method thereof
  • A kind of environment-friendly flame-retardant silicone sealant and preparation method thereof
  • A kind of environment-friendly flame-retardant silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] α, ω-dihydroxypolysiloxane, polydimethylsiloxane, fumed silica, bis[(6-oxo-6-hydrogen-diphenyl And-(c,e)(1,2)-oxaphosphorin-6-one)-ethyl]-siloxane is added to the planetary mixer, the vacuum degree is -0.1~-0.09, and the rotation speed is 12~50rmp Stir for 2-6 hours under certain conditions, and after mixing, add KH550, ethyl orthosilicate, and dibutyl rubber tin dilaurate into it, and discharge after 10-20 minutes to obtain silicone sealant. Then test various properties, and the product test results are shown in Table 2.

Embodiment 2

[0030] Repeat the method of Example 1 according to the content of each component described in the following Table 1, but the flame retardant uses bis[(6-oxygen-6-hydrogen-dibenzo-(c,e)(1,2)- Oxaphosphorin-6-one)-propyl]-siloxane instead of bis[(6-oxo-6-hydro-dibenzo-(c,e)(1,2)-oxaphosphorinane -6-keto)-ethyl]-siloxane, the filler uses stearic acid-modified nano-calcium carbonate instead of fumed silica, and the cross-linking agent uses methyl trimethoxysilane instead of ethyl orthosilicate, The coupling agent uses KH560 instead of KH550, and the catalyst uses butyl titanate instead of dibutyl rubber tin dilaurate. The product test results are shown in Table 2.

Embodiment 3

[0032] The method of embodiment 1 is repeated by each component content described in the following table 1, but filler uses active nano calcium carbonate and fumed white carbon black (wherein the weight ratio of active nano calcium carbonate and fumed white carbon black is 15:1) Composite use replaces fumed white carbon black alone, methyl triethoxysilane is used as a crosslinking agent instead of ethyl orthosilicate, dibutyltin diacetate is used as a catalyst instead of dibutyl rubber tin dilaurate, and KH170 is used as a coupling agent Replace KH550, product test results are shown in Table 2.

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Abstract

The invention discloses a novel environment-friendly flame-retardant silicone sealant and a preparation method thereof. The novel environment-friendly flame-retardant silicone sealant comprises, by weight, 100 parts of alpha, omega-dihydroxy polymethylsiloxane, 1-50 parts of polymethylsiloxane, 5-150 parts of filler, 1-10 parts of phosphorous silicone flame retardant, 1-15 parts of crosslinking agent, 0.1-3 parts of catalyst and 0.5-4 parts of coupling agent. The dealcoholized flame-retardant silicone sealant is prepared by adopting a method of adding novel environment-friendly flame retardant, so that the problem that dealcoholized flame-retardant sealant products are low in flame retardance is solved, and the preparation method is simple; loss is low in the process of production, and the sealant is high in processing performance.

Description

technical field [0001] The invention relates to a flame-retardant silicone sealant and a preparation method thereof, belonging to the field of polymer sealing materials. Background technique [0002] Silicone sealants have excellent temperature resistance, weather resistance, anti-aging, no cracks, shock resistance and moisture resistance, and are widely used in construction, electronic appliances, automobiles, and aerospace fields. With the enhancement of people's awareness of fire safety, the requirements for the fire protection level of sealants are getting higher and higher. Although ordinary silicone sealants have certain flame retardant properties, their flame retardant properties still cannot meet the industry requirements. It has become a feasible and effective method to improve the flame retardancy of products by adding flame retardants to silicone sealants. [0003] Additive flame retardants such as aluminum hydroxide and magnesium hydroxide are non-toxic, smoke-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J11/08C09J11/06C09J11/04
Inventor 湛露陈海平苗刚李恩黄潇
Owner HUBEI XINGRUI SILICON MATERIAL CO LTD