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Ketoxime type room temperature vulcanized silicone rubber with long storage period and preparation method thereof

A technology of storage period ketoxime and room temperature vulcanization, which is applied in the field of long storage period ketoxime type room temperature vulcanized silicone rubber and its preparation, can solve the problems of prolonged surface drying time and short storage period, so as to improve storage period, reduce corrosion, Effect of improving curing speed and bonding strength

Active Publication Date: 2011-06-15
GLEIHOW NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ketoxime type room temperature vulcanized silicone rubber has better overall performance and wider application, but its disadvantage is that the storage period is short
The main reason is that there are active hydroxyl groups and trace moisture in the sealant, which will cause the surface dry time (viscosity loss time) of ketoxime rubber to prolong as the storage period increases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Long shelf life ketoxime type room temperature vulcanized silicone rubber, by weight ratio, includes the following components:

[0037] α, ω-dihydroxy polysiloxane 100 kg

[0038] Butanketoximomethoxysilane 20 kg

[0039] Diisopropoxy-bis(acetylacetonate)titanium 100g

[0040] Fumed silica 100kg

[0041] MTD silicone oil 5kg

[0042] Titanium dioxide 2 kg

[0043] Hexamethyldisilazane 0.5 kg

[0044] γ-Aminopropyltriethoxysilane 2 kg

[0045] Preparation:

[0046] Add 100 kg of α, ω-dihydroxy polysiloxane (viscosity of 2000-80000 mPas at 25°C), 100 kg of fumed silica (specific surface area of ​​200 m3 / g), and 2 kg of titanium dioxide into the vacuum kneader , at a temperature of 150°C and a vacuum of 0.09 MPa, dehydration and blending for 300 minutes, and then transferred to a planetary stirring tank for later use.

[0047] At room temperature, mix 20 kg of methyl ethyl ketoxime methoxysilane, 5 kg of MTD silicone oil, 2 kg of γ-aminopropyltriethoxysilane (KH550...

Embodiment 2

[0049] Long shelf life ketoxime type room temperature vulcanized silicone rubber, by weight ratio, includes the following components:

[0050] α, ω-dihydroxy polysiloxane 100 kg

[0051] Butanketoximomethoxysilane 20 kg

[0052] Diisopropoxy-bis(acetylacetonate)titanium 100g

[0053] Fumed silica 100kg

[0054] MTD silicone oil 5kg

[0055] Titanium dioxide 2 kg

[0056] Hexamethyldisilazane 0.5 kg

[0057] γ-(glycidoxy)propyltrimethoxysilane 0.5 kg

[0058] γ-Aminopropyltriethoxysilane 1.5 kg

[0059] Preparation:

[0060]Add 100 kg of α, ω-dihydroxy polysiloxane (viscosity of 2000-80000 mPas at 25°C), 100 kg of fumed silica (specific surface area of ​​200 m3 / g), and 2 kg of titanium dioxide into the vacuum kneader , at a temperature of 150°C and a vacuum of 0.09 MPa, dehydration and blending for 300 minutes, and then transferred to a planetary stirring tank for later use.

[0061] At room temperature, mix 20 kg of methyl ethyl ketoxime methoxysilane, 5 kg of MTD typ...

Embodiment 3

[0063] Long shelf life ketoxime type room temperature vulcanized silicone rubber, by weight ratio, includes the following components:

[0064] α, ω-dihydroxy polysiloxane 100 kg

[0065] Butanketoximomethoxysilane 20 kg

[0066] Diisopropoxy-bis(acetylacetonate)titanium 100g

[0067] Fumed silica 100kg

[0068] MTD silicone oil 5kg

[0069] Iron oxide red 2.5 kg

[0070] Trimeric (6-isocyanatohexyl) isocyanate 0.5 kg

[0071] γ-(glycidoxy)propyltrimethoxysilane 0.5kg

[0072] γ-Aminopropyltriethoxysilane 1.5 kg.

[0073] Preparation:

[0074] Add 100 kg of α, ω-dihydroxy polysiloxane (viscosity of 2000-80000 mPas at 25°C), 100 kg of fumed silica (specific surface area of ​​200 m3 / g), and 2.5 kg of iron oxide red into the vacuum kneader Inside, at a temperature of 150°C and a vacuum of 0.09 MPa, dehydration and blending for 300 minutes, and transfer to a planetary stirring tank for later use.

[0075] At room temperature, mix 20 kg of methyl ethyl ketoxime methoxysilan...

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PUM

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Abstract

The invention belongs to the field of building sealing materials, and particularly relates to ketoxime type room temperature vulcanized silicone rubber with long storage period and a preparation method thereof. The rubber comprises the following components in part by weight: 10 to 100 parts of fundamental substance, 3 to 20 parts of crosslinking agent, 0.1 to 2 parts of catalyst, 10 to 100 parts of filler, 1 to 10 parts of thixotropic agent, 2 to 4 parts of pigment, 0.5 to 2 parts of hydroxyl scavenger and 0.5 to 2 parts of tackifier. In the method, an organic silicon-oxygen polymer is adopted as the fundamental substance, and the hydroxyl scavenger is introduced to improve the storage period, wherein the crosslinking agent is methyl-trithoxysilicane and 2-butanone oxime, and is prepared by reacting for 20h at the temperature of between 100 and 150 DEG C in the absence of the catalyst. The ketoxime type room temperature vulcanized silicone rubber with long storage period is steady in storage and strong in cohesive force; and the corrosion on metal materials is reduced by replacing the conventional tin catalysts with a titanium complex.

Description

technical field [0001] The invention belongs to the category of building sealing materials, in particular to a long-storage ketoxime type room temperature vulcanized silicone rubber and a preparation method thereof. Background technique [0002] Ketoxime room temperature vulcanized silicone rubber has excellent water resistance, ozone resistance, corona discharge resistance, corrosion resistance, weather aging resistance and other properties. As a sealing material, it can also play the role of insulation, dustproof, moistureproof and shockproof. The by-product ketoxime released during the vulcanization process has a small odor and has no corrosion to other metals except for a slight corrosion on copper. It is a type of silicone rubber with good cost performance. It is mainly used in sealants and adhesives in the construction, electrical and electronic industries, and the automotive industry. It is a silicone rubber variety with a large sales volume in the market. [0003] K...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08K13/02C08K5/5465C08K3/36C08K3/26C08K3/34C08K3/22C08K3/04C08K5/5445C08K5/3492
Inventor 姜银辉邹尚伟冉锋潘岩李长多刘泽龙
Owner GLEIHOW NEW MATERIALS CO LTD
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