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High-transparency mildew-proof silane modified polymer sealant and preparation method and application thereof

A silane-modified polyether and silane-modified technology, used in the field of sealants, can solve the problems of low transparency, poor durability, yellowing, etc., and achieve a simple preparation process, improved storage stability, and strong adhesion. Effect

Pending Publication Date: 2021-07-16
吉和昌新材料(荆门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current transparent anti-mildew silane-modified polymer sealants generally have some defects, such as low transparency, or high transparency will appear yellowing and mildew in different degrees during use, and the durability is not good.

Method used

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  • High-transparency mildew-proof silane modified polymer sealant and preparation method and application thereof
  • High-transparency mildew-proof silane modified polymer sealant and preparation method and application thereof
  • High-transparency mildew-proof silane modified polymer sealant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A highly transparent anti-mildew type silane-modified polymer sealant, prepared according to the following raw materials in parts by weight:

[0038]

[0039](1) According to the metering ratio of each component, 68.15 parts of polyfunctional polyether (average hydroxyl value is about 5 mgKOH / g), 20 parts of PPG-18000 (polypropylene glycol 18000), 0.5 parts of 2-methyl-4 - Isothiazolin-3-one, 1.0 part of 2-benzisothiazolin-3-one, 0.4 part of Tinuvin 326, 0.3 part of Tinuvin 770 and 0.8 part of Irgafos 1010 were vacuum treated at 80-120°C for 1-3 hours, then Cool down to 60-80°C, add 1.5 parts of isocyanate propyl trimethoxysilane, 0.3 parts of isocyanate propyl triethoxysilane and 0.05 parts of dibutyltin dilaurate, and react for 3-6 hours;

[0040] (2) Transfer the material in step (1) to a high-speed disperser, then add 5.0 parts of fumed silica, and disperse at 60-80°C for 1-2 hours in a vacuum at high speed;

[0041] (3) Finally, cool down to below 30°C, add 1.8...

Embodiment 2

[0043] A highly transparent anti-mildew type silane-modified polymer sealant, prepared according to the following raw materials in parts by weight:

[0044]

[0045]

[0046] (1) According to the metering ratio of each component, first mix 78.52 parts of polyfunctional polyether (average hydroxyl value of about 4.5mgKOH / g), 10 parts of diisononyl phthalate, 0.6 parts of 2-methyl- 1,2-benzisothiazol-3-one, 0.8 part of 3-hydroxyisothiazole, 0.8 part of Tinuvin329, 0.4 part of Tinuvin B75, 0.5 part of Irgafos 1076 and 0.3 part of Irgafos 245, vacuum treatment at 80~120℃ for 1~3h , then lower the temperature to 60-80°C, add 1.4 parts of isocyanate propyltrimethoxysilane and 0.08 parts of zinc isooctanoate, and react for 3-6 hours;

[0047] (2) Transfer the material in step (1) into a high-speed disperser, then add 8 parts of fumed silica, and disperse at 60-80°C for 1-2 hours in a high-speed vacuum;

[0048] (3) Finally lower the temperature to below 30°C, add 1.5 parts of ...

Embodiment 3

[0050] A highly transparent anti-mildew type silane-modified polymer sealant, prepared according to the following raw materials in parts by weight:

[0051]

[0052] (1) According to the metering ratio of each component, 63.93 parts of polyfunctional polyether (average hydroxyl value is about 3.5mgKOH / g), 5 parts of PPG-16000 (polypropylene glycol-16000), 10 parts of phthalic acid Dioctyl ester, 1.2 parts of 2-methyl-4-isothiazolin-3-one, 0.6 parts of 2-methyl-1,2-benzisothiazol-3-one, 0.8 parts of Tinuvin326, 0.7 parts of Tinuvin 765, 0.7 parts of Irgafos1035 and 0.2 parts of Irgafos 168 were vacuum treated at 80-120°C for 1-3 hours, then cooled to 60-80°C, and 0.8 parts of isocyanate propyl trimethoxysilane, 0.2 parts of isocyanate propyl triethoxysilane and 0.07 parts of dibutyltin dilaurate, react for 3-6 hours;

[0053] (2) Transfer the material in step (1) into a high-speed disperser, then add 10 parts of fumed silica, and disperse at 60-80°C for 1-2 hours in a high-...

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Abstract

The invention discloses a high-transparency mildew-proof silane modified polymer sealant and a preparation method and application thereof. The sealant is prepared from the following substances in parts by weight: 60 to 80 parts of silane modified polymer, 5 to 20 parts of filler, 0 to 20 parts of plasticizer, 0.1 to 5 parts of mildew preventive, 0.5 to 3 parts of water absorbent, 0.5 to 2 parts of light stabilizer, 0.5 to 2 parts of antioxidant, 0.5 to 5 parts of silane coupling agent and 0.2 to 3 parts of catalyst. The prepared silane modified polymer sealant has the advantages of high transparency, zero-grade mildew resistance, yellowing resistance, no toxicity, harmlessness, greenness and environmental protection, has excellent adhesion, sealing property, aging resistance, coating property and the like in harsh environments such as high temperature and high humidity, and is suitable for being used in the fields of home decoration, vehicle engineering and the like with high requirements on mildew resistance and environmental protection. The integrated process of the silane modified polymer and the sealant thereof is realized, the preparation method is simple, the operation is convenient, the production cost is low, and industrialization is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of sealants, and in particular relates to a high-transparency anti-mildew type silane-modified polymer sealant and its preparation method and application. [0002] technical background [0003] Sealant is a sealing material with a certain degree of adhesion, which is widely used in industrial and civil fields such as home improvement, construction, electronics, automobiles and aerospace. With the continuous development of all walks of life, higher requirements are constantly put forward for the performance of sealants. In the field of home decoration and electronics industry, sealants are required to have excellent sealing and bonding properties, be non-toxic, harmless, green and environmentally friendly, and have extremely high transparency and mildew resistance. In a hot and humid environment, the mold produced will damage the sealant structure, and it is prone to mildew, softening and deformation, which s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J171/02C09J11/04C09J11/06C09J11/08
CPCC09J171/02C09J11/04C09J11/06C09J11/08C08K2201/014C08L2201/10C08L2201/08C08L71/02C08K13/04C08K7/26C08K5/47C08K5/5465C08K5/12Y02P20/10
Inventor 付远波张静刘凤亮赵樊王亮崔显淼盛哲哲潘琦杨瀚石张玉祥任凡
Owner 吉和昌新材料(荆门)有限公司
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