Silicone sealant for automobile side windscreen and preparation method thereof

A silicone sealant, windshield technology, used in chemical instruments and methods, adhesives, other chemical processes, etc.

Active Publication Date: 2014-10-15
江苏华硅新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the automobile maintenance industry, according to statistics, nearly 20% of automobiles need to replace the windshield every year due to various reasons. The use of two-component will bring great inconvenience. This field needs a kind of easy-to-use, compatible with various substrates Good adhesion, good weather resistance, fast curing sealant products

Method used

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  • Silicone sealant for automobile side windscreen and preparation method thereof
  • Silicone sealant for automobile side windscreen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The silicone sealant of the present embodiment is composed as follows:

[0071] α, ω-dihydroxypolysiloxane 100 parts by weight

[0072] Modified silicon dioxide 60 parts by weight

[0073] Vinyltriethoxysilane 1 part by weight

[0074] Butyl titanate 0.3 parts by weight

[0075] 15 parts by weight of methyl silicone oil

[0076] Modified silicon dioxide is KH550 silane coupling agent and sodium stearate modified silicon dioxide.

[0077] The preparation method of this silicone sealant is:

[0078] 1) Add 100 parts by weight of α, ω-dihydroxy polysiloxane, 60 parts by weight of KH550 coupling agent and sodium stearate modified silicon dioxide into the kneader, and heat Mixing and dehydration at ~0.1MPa for 360 minutes, cooling to obtain the base material;

[0079] 2) Add 1 part by weight of vinyltriethoxysilane, 0.3 part by weight of butyl titanate, and 15 parts by weight of methyl silicone oil into a strong disperser, mix with the above base material, and at room ...

Embodiment 2

[0082] The silicone sealant of the present embodiment is composed as follows:

[0083] α, ω-dihydroxypolysiloxane 100 parts by weight

[0084] Modified silica 10 parts by weight

[0085] Vinyltriethoxysilane 1.5 parts by weight

[0086] Butyl titanate 0.5 parts by weight

[0087] 5 parts by weight of methyl silicone oil

[0088] Modified silicon dioxide is sodium stearate modified silicon dioxide.

[0089] The preparation method of this silicone sealant is:

[0090] 1) Add 100 parts by weight of α, ω-dihydroxypolysiloxane and 10 parts by weight of sodium stearate modified silicon dioxide into the kneader, and mix at 110-140°C and vacuum degree of 0.06-0.1MPa Refining and dehydration for 30 minutes, cooling to obtain the base material;

[0091] 2) Add 1.5 parts by weight of vinyltriethoxysilane, 0.5 parts by weight of butyl titanate, and 5 parts by weight of methyl silicone oil into a strong disperser, mix with the above base material, and at room temperature, the vacuum ...

Embodiment 3

[0094] The silicone sealant of the present embodiment is composed as follows:

[0095] α, ω-dihydroxypolysiloxane 100 parts by weight

[0096] Modified silicon dioxide 60 parts by weight

[0097] Vinyltriethoxysilane 2 parts by weight

[0098] Butyl titanate 0.1 parts by weight

[0099] 20 parts by weight of methyl silicone oil

[0100] Modified silicon dioxide is potassium stearate modified silicon dioxide.

[0101] The preparation method of this silicone sealant is:

[0102] 1) Add 100 parts by weight of α, ω-dihydroxypolysiloxane and 60 parts by weight of potassium stearate modified silicon dioxide into the kneader, and mix at 110-140°C and vacuum degree of 0.06-0.1MPa Refining and dehydration for 120 minutes, cooling to obtain the base material;

[0103] 2) Add 2 parts by weight of vinyltriethoxysilane, 0.1 parts by weight of butyl titanate, and 20 parts by weight of methyl silicone oil into a strong disperser, mix with the above base material, and at room temperatur...

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Abstract

The invention relates to a silicone sealant for an automobile side windscreen and a preparation method thereof. The preparation method comprises the following steps of 1, adding 100 parts by weight of alpha, omega-polysiloxanediol and 10-60 parts by weight of a KH550 coupling agent and sodium stearate-modified silica into a kneader, carrying out mixing dehydration at a temperature of 110-140 DEG C at a vacuum degree of 0.06-0.1MPa for 30-360min and carrying out cooling to obtain a base material, and 2, orderly adding 0.5-2 parts by weight of a cross-linking agent, 0.1-0.5 parts by weight of a catalyst and 5-20 parts by weight of methyl silicone oil into a high speed dispersion machine, and mixing the materials and the base material at a room temperature at a vacuum degree of 0.06-0.1MPa at a rotation rate of 600rpm for 30-120min to obtain the silicone sealant. The silicone sealant is convenient for use, has good cementability to various base materials, and has good weatherability and a fast curing rate.

Description

technical field [0001] The invention relates to a silicone sealant for automobile side windshields and a preparation method thereof. Background technique [0002] For the installation and equipment of automobile windshield, the traditional method is to adopt the mechanical beading installation method. This installation method requires a lot of labor and assembly time, and it will also bring a lot of trouble during maintenance. [0003] In the early 1960s, General Motors (GM) of the United States first changed the mechanical bead-type installation method of its car windshield, and directly bonded the windshield to the car with a multi-component polysulfide sealant (PS). On the body, it can not only save time, money and labor, but also increase the strength of the car body. Other companies in the United States and major automobile manufacturers in the world have also followed GM to install windshield glass by SSG method. Now almost all high-end cars use this method. In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10C09C1/28C09C1/40C09C3/12
Inventor 严华宁
Owner 江苏华硅新材料科技有限公司
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