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Silicone fireproof sealant for construction and preparation method thereof

A technology for fireproof sealant and construction, applied in the direction of chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of reducing the mechanical processing performance and mechanical properties of sealants, environmental secondary pollution, and limiting the scope of application, etc., to achieve Improved machinability, high flame retardant efficiency, and convenient construction

Inactive Publication Date: 2010-06-23
浙江凌志新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, silicone sealants obtain flame retardant effects by adding halogen flame retardants or inorganic flame retardants. Although halogen flame retardants have high flame retardant efficiency, their flame retardant mechanism is to generate non-combustible hydrogen halide gas during combustion. It will cause secondary pollution to the environment, and at the same time cause harm to personnel, and has been gradually banned from use
Inorganic flame retardants are used as flame retardant fillers. Compared with halogen flame retardants, they have the advantages of non-toxicity, low smoke, and low corrosion. However, to obtain excellent flame retardant effects, a large amount needs to be added, and a large amount of inorganic The use of flame retardant fillers will reduce the machinability and mechanical properties of the sealant, limiting its application range

Method used

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  • Silicone fireproof sealant for construction and preparation method thereof
  • Silicone fireproof sealant for construction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 100 parts of α, ω-dihydroxypolysiloxane, 30 parts of aluminum hydroxide, 50 parts of melamine cyanurate, and 0.01 part of kaolin into the kneader, knead and dehydrate for 0.5 hours at a temperature of 180°C and a vacuum degree of 0.1MPa , the base material is obtained after cooling. At room temperature, add the base material into the planetary mixer, and then add 0.01 part of polydimethylsiloxane, 0.1 part of carbon black, 2 parts of methyltrimethoxysilane, 3-glycidylpropyltrimethoxysilane 2 parts, 2 parts N-(β-aminoethyl)-α-aminopropyltrimethoxysilane, 2 parts isopropyl titanate were added to the planetary mixer together with the base material at a vacuum degree of 0.1MPa, and the rotation speed was 80 rpm The chemical reaction is carried out for 0.5 hours at the time of / minute to make a silicone fireproof sealant for construction. The product performance test results are shown in Table 1.

Embodiment 2

[0034] Add 100 parts of α,ω-dihydroxypolysiloxane, 80 parts of zinc borate, 10 parts of melamine cyanurate, and 20 parts of silicon micropowder into the kneader, knead and dehydrate for 2.5 hours at a temperature of 100°C and a vacuum degree of 0.08MPa. , the base material is obtained after cooling. At room temperature, the base material was added to the planetary mixer, and then 20 parts of polydimethylsiloxane, 10 parts of iron red, 8 parts of vinyl tributyl ketoximo silane, and 7 parts of methyl tributyl ketoximo silane were added. parts, 0.2 parts of N-(β-aminoethyl)-α-aminopropyltrimethoxysilane, and 5 parts of titanate chelate were added to the planetary mixer together with the base material at a vacuum degree of 0.06MPa, and the rotation speed was 20 rpm The chemical reaction is carried out for 6 hours at the temperature of / min to make a silicone fireproof sealant for construction. The product performance test results are shown in Table 1.

Embodiment 3

[0036] 100 parts of α, ω-dihydroxypolysiloxane, 30 parts of ultrafine calcium carbonate, 60 parts of magnesium hydroxide, and 30 parts of melamine were added to the kneader, kneaded and dehydrated for 4 hours at a temperature of 150°C and a vacuum degree of 0.06MPa, The base material is obtained after cooling. At room temperature, the base material was added to the planetary mixer, and then 50 parts of polydimethylsiloxane, 5 parts of iron red, 6 parts of methyltributyl ketoximinosilane, N-(β-aminoethyl) - 3 parts of α-aminopropyltrimethoxysilane and 0.5 part of dibutyltin dilaurate were added to the planetary mixer together with the base material, and the chemical reaction was carried out for 3 hours under the vacuum degree of 0.08MPa and the rotation speed of 30 rpm. Silicone fireproof sealant for construction. The product performance test results are shown in Table 1.

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Abstract

The invention discloses a silicone fireproof sealant for construction and a preparation method thereof. The preparation comprises the steps of adding alpha, omega-dihydroxy polysiloxane, a filler, an inorganic flame retardant and a nitrogen system flame retardant into a kneading machine, carrying out dehydration at the temperature of 100-180 DEG C and the vacuum degree of 0.06-0.1MPa for 0.5-4 hours, cooling, and then preparing a base material. The base material, polydimethylsiloxane, an inorganic pigment, a crosslinking agent, a silane coupling agent and a catalyst are added into a planetary mixer at the room temperature, keeping the vacuum degree at 0.06-0.1MPa, stirring at the speed of 20-80 r / min, carrying out reaction under stirring for 0.5-6 hours, and preparing the silicone fireproof sealant for construction with no pollution to the base material, flame retardance and excellent adhesion and storage stability. The inorganic flame retardant and the nitrogen system flame retardant are in synergistic flame retardance, and the silicone fireproof sealant can effectively reduce the adding amount of the inorganic flame retardant and greatly improve the mechanical processing performance of a product under the situation of achieving the equivalent flame retardant grade FV-0.

Description

technical field [0001] The invention relates to an environment-friendly building material, in particular to a silicone fireproof sealant for construction and a preparation method thereof. Background technique [0002] Silicone sealant has excellent aging resistance, physiological inertia, shock resistance, compression resistance, etc., and can be vulcanized under normal temperature and pressure. Since entering the Chinese market in the early 1980s, the domestic silicone sealant industry has developed rapidly. The products are widely used and the consumption has surged, and they are widely used in construction, automobile, electrical and electronic, machinery, chemical industry and other industries. Although ordinary silicone rubber has certain flame retardancy, it does not have flame retardancy and self-extinguishing. With the increase in the use of silicone sealants in high-rise buildings, hotels, hospitals, stations, and large-scale public entertainment venues, public tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/06C09J11/04C09K3/10
Inventor 陈世龙刘华杨静朱利丹张惠君高传花丁晓林
Owner 浙江凌志新材料有限公司
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