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Single-component moldproof transparent dealcoholized silicone sealant and preparation method thereof

A silicone sealant and dealcoholization technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of yellowing and mildew of silicone sealant, improve thixotropy and improve compatibility , Overcome the effect of slow curing

Active Publication Date: 2015-07-22
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods involved in the above two patents failed to solve the problems of yellowing and moldy silicone sealant at the same time

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 100 parts of glue with a kinematic viscosity of 20 Pa·s107 into the mixer, use 1.6 parts of methyltrimethoxysilane under the conditions of nitrogen gas and temperature of 60 ° C, and carry out capping reaction for 60 minutes to obtain 100 parts of terminal methyl dimethoxy base polydimethylsiloxane; adding 100 parts of methyl-terminated polydimethylsiloxane with kinematic viscosity of 5Pa·s and 15 parts of hydrophobic fumed silica with a specific surface area of ​​150m2 / g in vacuum > Stir for 25 minutes under the condition of 0.09Mpa; finally add 8 parts of methyltrimethoxysilane, 0.8 parts of 10,10-oxobisphenoxarsenic with polyether polyol as carrier, 3 parts of γ-aminopropyltrimethoxysilane 1 part, 0.4 part of dibutyl tin dilaurate, and stirred for 10 minutes under the condition of vacuum degree >0.09Mpa to make a one-component anti-mold transparent dealcoholized silicone sealant. The product performance test results are shown in Table 1.

Embodiment 2

[0030] Add 100 parts of 107 glue with a kinematic viscosity of 20 Pa·s into the mixer, and use 2 parts of methyltrimethoxysilane to carry out capping reaction for 60 minutes under nitrogen gas and temperature of 60 ° C to obtain 100 parts of terminal methyl dimethyl Oxygenated polydimethylsiloxane; adding 50 parts of polydimethylsiloxane with a kinematic viscosity of 2Pa·s and a specific surface area of ​​150m 2 / g 25 parts of hydrophobic fumed silica and stirred for 25 minutes under the condition of vacuum degree >0.09Mpa; finally, 5 parts of vinyltrimethoxysilane and 10,10-oxobisphenoxane with polyether polyol as the carrier were added 1.5 parts of arsenic, 3 parts of N-β-aminoethyl γ-aminopropyl trimethoxysilane, 0.4 parts of dioctyltin dilaurate, stirred for 10 minutes under the condition of vacuum>0.09Mpa to make a one-component anti-mold transparent Dealcoholized silicone sealant, product performance test results are shown in Table 1.

Embodiment 3

[0032] Add 100 parts of 107 glue with a kinematic viscosity of 20 Pa·s into the mixer, and use 2 parts of methyltrimethoxysilane to carry out capping reaction for 60 minutes under nitrogen gas and temperature of 60 ° C to obtain 100 parts of terminal methyl dimethyl Oxygenated polydimethylsiloxane; add 20 parts of methyl-terminated polydimethylsiloxane with kinematic viscosity of 0.3Pa·s, specific surface area of ​​200m2 / g hydrophobic fumed silica Stir for 25 minutes under the condition of 0.09Mpa; finally add 5 parts of phenyltrimethoxysilane, 0.3 parts of 10,10-oxobisphenoxarsenic with polyether polyol as carrier, N-methyl-3-aminopropyl 3 parts of trimethoxysilane and 0.4 parts of dibutyltin di(dodecylsulfide) were stirred for 10 minutes under the condition of vacuum degree>0.09Mpa to make a one-component anti-mold transparent dealcoholized silicone sealant, product performance test results See Table 1 for details.

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Abstract

The invention discloses a single-component moldproof transparent dealcoholized silicone sealant and a preparation method thereof. The single-component moldproof transparent dealcoholized silicone sealant is prepared by adding a mold preventive into a transparent dealcoholized silicone sealant. The sealant is characterized in that the mold preventive is an organic arsenic compound using polyether glycol as a carrier; and on the basis of 100 parts of alkoxyalkyl terminated polysiloxane, the mold preventive is 0.1-2 parts by weight. By using the organic arsenic compound as the mold preventive, the sealant has the advantages of excellent moldproof effect, low smell, yellowing resistance and high deep curing speed on the premise of not influencing the transparency, manufacturability and storage stability of the transparent dealcoholizd silicone sealant.

Description

technical field [0001] The invention relates to a one-component mildew-resistant transparent dealcoholized silicone sealant and a preparation method thereof, belonging to the technical field of silicone sealant materials. Background technique [0002] With the rapid development of architecture in our country, architectural design concepts and technologies have undergone major innovations, and various new materials have been applied in the construction field. One-component RTV silicone rubber, also known as silicone sealant, is widely used in various construction projects and interior decoration due to its excellent cold resistance, heat resistance, aging resistance, waterproof and moisture resistance. However, there is a disadvantage of silicone sealant, that is, after curing, it is easy to reproduce mold on its surface in a high-humidity environment for a long time, resulting in black spots on its surface, affecting the appearance and even its own sealing performance. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08C09K3/10
Inventor 王伟叶全明刘钧李鹏洲
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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