Anti-fouling single-component room temperature sealing silicone sulfide glue and its production process

A vulcanized silicone and sealant technology, which is applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of easy discoloration, surface dust collection, and pollution of the sealant surface, and achieve good physical and mechanical properties and bonding Excellent performance and easy to use

Active Publication Date: 2008-04-16
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the surface of the vulcanized silicone sealant is very easy to absorb dust, and at the same time, due to the slow seepage of oily plasticizers and a small amount of low molecular substances in the silicone sealant, it will pollute the surrounding substrates of the building.
In order to reduce the dust deposited on the surface of the silicone sealant and the pollution to the surrounding substrates of the building, Japanese Patent Laid-Open No. 62-1750 and 62-7763 add dry oils such as tung oil and hydrogenated castor oil to the formula, although they have anti-pollution properties. , but the dry oil of the sealant is slowly precipitated from the sealant during storage, thereby affecting the shelf life of the sealant, and the surface of the sealant is easy to change color; U.S. Patents US 4460740, US 4695603 and Japanese Patent Laid-Open No. 56-76453, 56 -76542 reports adding surfactants to the sizing material. This method has a temporary anti-fouling effect, and the deposition of dust on the surface of the sealant reduces, but it will greatly affect the adhesion of the silicone sealant to the base material; US 5357025 adds fluorine-containing Carbon-based siloxane agent, fluorocarbon-based siloxane agent and dry oil such as tung oil, hydrogenated castor oil are used to prepare the room temperature vulcanized silicone sealant to form a dry oil oxidation product layer on the surface of the vulcanized sealant to play a role Antifouling effect
However, this dry oil oxidation product layer will gradually disappear when exposed to the atmosphere, and the cleaning effect will gradually lose, and the surface will be dust-absorbed and moldy, and the cost is high

Method used

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  • Anti-fouling single-component room temperature sealing silicone sulfide glue and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Add 100 parts by weight of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 50 Pa·S at 25°C and 70 parts by weight of activated calcium carbonate into a vacuum mixer at a temperature of 130°C and a vacuum degree of 0.09MPa, dehydration and blending for 100 minutes, cooling to obtain base material. At room temperature, in a high-speed dispersion mixer equipped with the above-mentioned base material, add 5 parts by weight of antifouling agent I, 12 parts by weight of methyl ketoxime silane, and 0.5 parts by weight of γ-aminopropyl triethoxysilane , 1.2 parts by weight of dibutyl tin dilaurate, added into a high-speed dispersion mixer, stirred for 60 minutes at a vacuum degree of 0.09 MPa and a rotational speed of 600 rpm to prepare an anti-pollution one-component room temperature vulcanized silicone sealant.

Embodiment 2

[0035] Example 2: Add 100 parts by weight of α, ω-dihydroxypolysiloxane with a viscosity of 30 Pa·S at 25°C and 100 parts by weight of activated calcium carbonate into a vacuum mixer at a temperature of 120°C and a degree of vacuum of 0.085MPa. Dehydrate and blend for 120 minutes, and cool to obtain the base material. At room temperature, in a high-speed dispersing mixer equipped with the above-mentioned base material, mix antifouling agent I, 30 parts by weight, 7 parts by weight of methyl tributyrin, 2 parts by weight of vinyl tributyrin, γ -4 parts by weight of aminopropyltriethoxysilane and 0.7 parts by weight of dibutyltin dilaurate, add it into a high-speed dispersion mixer, stir for 60 minutes at a vacuum degree of 0.09MPa and a rotation speed of 600rpm to make a pollution-proof single-component room temperature Vulcanized silicone sealant.

Embodiment 3

[0036] Example 3: Add 100 parts by weight of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 10 Pa·S at 25°C and 130 parts by weight of activated calcium carbonate into a vacuum mixer at a temperature of 110°C and a vacuum degree of 0.080MPa, dehydration and blending for 150 minutes, cooling to obtain the base material. At room temperature, in a high-speed dispersion mixer equipped with the above-mentioned base material, add 20 parts by weight of antifouling agent II, 7 parts by weight of phenyl ketoxime silane, and γ-(2,3 glycidoxy)propyl 2 parts by weight of trimethoxysilane and 1 part by weight of dibutyltin diacetate are added into a high-speed dispersing mixer, and stirred for 60 minutes at a vacuum degree of 0.09 MPa and a rotational speed of 600 rpm to prepare an anti-pollution one-component room temperature vulcanized silicone sealant.

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PUM

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Abstract

The anti-fouling single-component room temperature sealing silicone sulfide glue features that silicon oil with molecular end radical Si-H and dry oil addition component as anti-fouling component in 5-30 weight portions, poly(alpha, omega-dihydroxy siloxane in 100 weight portions and active calcium carbonate in 70-130 weight portions are dewatered and mixed in a vacuum stirrer at 100-150 deg.c and vacuum degree of 0.06-0.099 MPa for 30-200 min, and cooled to obtain the base material. At room temperature, cross-linking agent in 5-15 weight portions, silane coupler in 0.5-5 weight portions and catalyst in 0.5-1.5 weight portions are then added inside a high speed dispersing stirrer or a planetary stirrer at vacuum degree 0.06-0.099 MPa and rotation speed 200-600 rpm for 30-150 min.

Description

Technical field [0001] The invention relates to an anti-pollution single-component room temperature vulcanized silicone sealant and a manufacturing method thereof, and belongs to the field of polymer sealing materials and the manufacturing thereof. Background technique [0002] Room temperature vulcanized silicone sealant does not require heating, light or other special conditions at room temperature. It can be vulcanized into an elastomer when exposed to moisture in the air. It is very convenient to use. The vulcanized sealant has excellent resistance to high and low temperature, good water resistance, excellent resistance to weathering, ozone, and ultraviolet rays, and has a service life of several decades. It has excellent and lasting adhesion to a variety of substrates such as aluminum alloy, glass, metal, stone, cement, and good elasticity, that is, the ability to resist displacement. Therefore, silicone sealants are widely used in the construction industry, especially in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/10C09J183/14
Inventor 袁素兰王有治卢麟邹百军
Owner CHENGDU GUIBAO SCI & TECH
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