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Neutral transparent silicone weather-resistant sealing adhesive for building

A construction and sealant technology, applied in the direction of adhesives, adhesive additives, other chemical processes, etc., can solve the problems of reacting with alkaline materials, limiting the application range of sealants, affecting the aesthetic effect of buildings, etc., to achieve good adhesion. Good bonding performance, low odor and good bonding performance

Inactive Publication Date: 2014-12-24
ZHEJIANG TIME NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional silicone sealant belongs to the deacetic acid type sealant, which will release small molecules of acetic acid during curing, which has a strong odor and has the disadvantages of corroding metal substrates and reacting with alkaline materials, which greatly limits this type of sealant. The scope of application of sealants, research work on neutral curing system silicone sealants has been carried out at home and abroad.
At present, the neutral curing silicone sealants in the domestic market often use calcium carbonate as a reinforcing filler, which often makes the final product opaque, and seriously affects the aesthetic effect of the building when applied to glass curtain walls and other buildings.

Method used

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  • Neutral transparent silicone weather-resistant sealing adhesive for building

Examples

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Effect test

example 1

[0023] α,ω-Dihydroxypolydimethylsiloxane 100000 mPa·s: 70 parts

[0024] α,ω-Dihydroxypolydimethylsiloxane 400000 mPa·s: 10 parts

[0025] Methyl silicone oil 1000 mPa·s: 20 parts

[0026] Fumed silica 100 m 2 / g: 9 servings

[0027] Fumed silica 150 m 2 / g: 1 part

[0028] Methyl tributylketoxime silane: 5 parts

[0029] γ-Aminopropyltriethoxysilane: 1 part

[0030] Dibutyltin diacetate: 0.05 parts

[0031] The above-mentioned neutral transparent silicone weather-resistant sealant for construction is prepared by the following steps: (1) mixing α,ω-dihydroxypolydiorganosiloxane, alkyl-terminated polydimethylsiloxane and Add the cross-linking agent to the glue tank, vacuumize (vacuum degree above 0.09 Mpa) and keep stirring at constant temperature (40~60°C) for 10~20 minutes; After eating, continue vacuuming (vacuum degree reaches above 0.09 Mpa), constant temperature stirring and mixing for 20~50 min; (3) shut down and empty, add tackifier and catalyst to the mixing co...

example 2

[0033] α,ω-Dihydroxypolymethylphenylsiloxane 10000 mPa·s: 10 parts

[0034] α,ω-Dihydroxypolymethylphenylsiloxane 1200000 mPa·s: 110 parts

[0035] Methylphenyl silicone oil 500 mPa·s: 80 parts

[0036] Fumed silica 50 m 2 / g: 10 parts

[0037] Fumed silica 250 m 2 / g: 20 parts

[0038] Methyl tributylketoxime silane: 12 parts

[0039] Vinyl tributylketoxime silane: 3 parts

[0040] γ-glycidyl etheroxypropyl trimethoxysilane: 2 parts

[0041] Dibutyltin dilaurate: 0.3 parts

[0042] The above raw materials were uniformly mixed according to the method of Example 1 to prepare a neutral transparent silicone weather-resistant sealant.

example 3

[0044] α,ω-Dihydroxypolydimethylsiloxane 80000 mPa·s: 30 parts

[0045] α,ω-Dihydroxypolymethyltrifluoropropylsiloxane 80000 mPa·s: 20 parts

[0046] α,ω-Dihydroxypolydimethylsiloxane 800000 mPa·s: 50 parts

[0047] Methyl silicone oil 500 mPa·s: 80 parts

[0048] Ethyl silicone oil 800 mPa s: 40 parts

[0049] Fumed silica 150 m 2 / g: 5 servings

[0050] Fumed silica 200 m 2 / g: 45 parts

[0051] Methyl tributylketoxime silane: 12 parts

[0052] Vinyl tributylketoxime silane: 5 parts

[0053] Tetrabutanoximinosilane: 3 parts

[0054] γ-Aminopropyltriethoxysilane: 4 parts

[0055] N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane: 1 part

[0056] Dibutyltin dilaurate: 0.3 parts

[0057] n-Butyl titanate: 0.2 parts

[0058] The above raw materials were uniformly mixed according to the method of Example 1 to prepare a neutral transparent silicone weather-resistant sealant.

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Abstract

The invention relates to a neutral transparent silicone weather-resistant sealing adhesive for a building and belongs to the technical field of adhesives. The neutral transparent silicone weather-resistant sealing adhesive is composed of 80-120 parts of alpha, omega-dihydroxyl poly-di-organosiloxane, 20-120 parts of alkyl terminated polydimethylsiloxane, 10-50 parts of fumed silica, 5-20 parts of a cross-linking agent, 1-5 parts of a tackifier and 0.05-0.5 part of a catalyst. The neutral transparent silicone weather-resistant sealing adhesive for the building has the advantages of high transparency, good adhesion performance, good weather resistance, high curing speed, small odor, no corrosion to most of base materials by neutral curing and the like, and can be applied to weather-resistant sealing of building engineering such as suspended glass walls, frame-hidden glass curtain walls and glass day-lighting roofs.

Description

technical field [0001] The invention relates to a neutral transparent silicone weather-resistant sealant for construction and a preparation method thereof, belonging to the technical field of adhesives. Background technique [0002] With the rapid development of my country's economy, various types of urban buildings are changing with each passing day. People have higher and higher requirements for building energy saving, waterproof, heat insulation and comfort. At the same time, the sealing of building joints is becoming more and more required by the construction industry. Attention, this undoubtedly greatly promoted the development of building joint sealants. Silicone sealant is widely used in various glass curtain walls, aluminum veneer curtain walls, stone curtain walls, etc. The weather-resistant seam seal has multiple functions such as bonding, sealing, waterproofing, and weather resistance. [0003] The traditional silicone sealant belongs to the deacetic acid type se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10
Inventor 林菊琴
Owner ZHEJIANG TIME NEW MATERIAL
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