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Single-component dealcoholized silicone sealant and preparation method thereof

A technology of alcohol silicone and sealant, which is applied in the field of one-component dealcohol silicone sealant and its preparation, can solve the problems of incompatibility between deep curing speed and physical and mechanical properties, and achieve excellent physical and mechanical properties and physical and mechanical properties Good, the effect of increasing the curing speed

Active Publication Date: 2021-04-16
江西晨光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the single-component dealcoholized silicone sealant in the prior art cannot balance the deep curing speed and physical and mechanical properties, the present invention provides a single-component dealcoholized silicone sealant with fast deep curing, and the sealant Excellent physical and mechanical properties after curing

Method used

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  • Single-component dealcoholized silicone sealant and preparation method thereof
  • Single-component dealcoholized silicone sealant and preparation method thereof
  • Single-component dealcoholized silicone sealant and preparation method thereof

Examples

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Embodiment 1

[0031] An embodiment of the present invention provides a one-component dealcoholized silicone sealant, the preparation method comprising the following steps:

[0032] The first step: 100 parts of α, ω-dihydroxypolydimethylsiloxane weighing 80000mPa·s, 75 parts of No. 3 white oil, 203.6 parts of light calcium carbonate, 12 parts of composite crosslinking agent (including 1.2 parts 1,2-bistrimethoxysilylethane and 10.8 parts of propyltrimethoxysilane), 2.4 parts of complex catalyst of ethyl acetoacetate of isopropyl titanate, 2 parts of complex silane coupling agent (Contains γ-aminopropyltriethoxysilane and γ-glycidyloxypropyltrimethoxysilane, mass ratio 1:1).

[0033] Step 2: Add α, ω-dihydroxypolydimethylsiloxane and light calcium carbonate into the kneader and mix well, heat up to 120°C, vacuum -0.09MPa, speed 400rpm, knead for 90 minutes, cool to At room temperature, the base material is obtained;

[0034] Step 3: Add the base material, No. 3 white oil, and composite cros...

Embodiment 2

[0037] The embodiment of the present invention provides a one-component dealcoholized silicone sealant, the raw materials and preparation method are the same as in Example 1, the only difference is: 80000mPa·s α, ω-dihydroxy polydimethylsilane 100 parts of oxane, 70 parts of No. 3 white oil, 230 parts of light calcium carbonate, 15 parts of composite crosslinking agent (including 2.25 parts of 1,2-bistrimethoxysilylethane and 12.75 parts of propyl trimethoxy silane), 4 parts of ethyl acetoacetate complex catalyst of isopropyl titanate, 5 parts of complex silane coupling agent (including γ-aminopropyltriethoxysilane and γ-glycidyl etheroxypropyl Trimethoxysilane, mass ratio 1:1).

Embodiment 3

[0039] The embodiment of the present invention provides a one-component dealcoholized silicone sealant, the raw materials and preparation method are the same as in Example 1, the only difference is: 80000mPa·s α, ω-dihydroxy polydimethylsilane 100 parts of oxane, 50 parts of No. 3 white oil, 150 parts of light calcium carbonate, 10 parts of composite crosslinking agent (including 0.5 parts of 1,2-bistrimethoxysilylethane and 9.5 parts of propyltrimethoxy base silane), 1 part of complex catalyst of ethyl acetoacetate of isopropyl titanate, 1 part of complex silane coupling agent (including γ-aminopropyltriethoxysilane and γ-glycidyl etheroxypropyl Trimethoxysilane, mass ratio 1:1).

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Abstract

The invention provides a single-component dealcoholized silicone sealant and a preparation method thereof. The single-component dealcoholized silicone sealant is prepared from the following raw materials in parts by weight: 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 50-90 parts of a plasticizer, 150-240 parts of an inorganic filler, 10-15 parts of a composite cross-linking agent, 1-5 parts of a silane coupling agent and 1-4 parts of a catalyst, wherein the composite cross-linking agent is prepared from 1, 2-bis(trimethoxysilyl)ethane and propyltrimethoxysilane. According to the invention, the composition of 1, 2-bis(trimethoxysilyl)ethane and propyltrimethoxysilane is used as a composite cross-linking agent, so that the deep curing speed of the single-component dealcoholized silicone sealant prepared from 1, 2bis (trimethoxysilyl) ethane, alpha, omega-dihydroxy polydimethylsiloxane, a plasticizer, an inorganic filler, a silane coupling agent and a catalyst in a specific weight ratio is increased, and the cured adhesive has excellent physical and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of silica gel synthesis, and more specifically, to a one-component dealcoholized silicone sealant and a preparation method thereof. Background technique [0002] One-component dealcoholized silicone sealant has excellent electrical properties and chemical inertness, the colloid is heat-resistant, natural aging-resistant, and moisture-resistant, and the small molecules released during the vulcanization process are neutral alcohol molecules, which are less corrosive to the substrate It is also more environmentally friendly and can be widely used in construction and electrical and electronic industries. It is one of the research directions of green adhesives in the future. [0003] The one-component dealcoholized silicone sealants currently on the market generally use α, ω-dihydroxypolydimethylsiloxane as the main resin, methyltrimethoxysilane as the crosslinking agent, titanium or tin The compound is obtained...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
Inventor 丁冰施德辉范轶陆金昌周俊刘广生
Owner 江西晨光新材料股份有限公司
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