A kind of automobile engine pad-free glue and preparation method thereof

A technology of automobile engine and pad rubber, which is applied in the field of organic silicon modification, can solve the problems of poor stability, poor transparency, easy cracking, etc., and achieve the effect of no VOC release

Active Publication Date: 2021-07-09
广州信粤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

[0008] The applicant Cai Peiyuan proposed an invention patent application CN2004100139487 in 2004, disclosing a preparation method of vinyl tris (methyl isobutyl ketoxime) silane, which is mainly used to solve the corrosiveness of traditional silicone rubber crosslinking agents , poor stability, poor transparency, easy to crack and other problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The formula table of the present embodiment is as follows:

[0053] Hydroxyl-terminated polydimethylsiloxane (80000cp, 25°C) 70%;

[0054] Methyl tris (methyl isobutyl ketoximino) silane 2%;

[0055] Vinyl tri(methyl isobutyl ketoximino)silane 3%;

[0056] Vinyltriethoxysilane 2%;

[0057] Tetraethyl orthosilicate 0.5%;

[0058] Phenyl MQ Silicone 3%

[0059] Silica 18.9%;

[0060] Dibutyltin dilauryl 0.1%;

[0061] Corning filler dispersion aid Z-6173 0.5%.

[0062]The preparation process is as follows:

[0063] Step 1: dehydrating each raw material to a moisture content lower than 0.3%;

[0064] Step 2: Add hydroxyl-terminated polydimethylsiloxane, tetraethyl orthosilicate, phenyl MQ silicone resin, silicon dioxide, and dispersant into the planetary bucket, stir and disperse evenly at room temperature and in a vacuum state;

[0065] Step 3: Add methyltris(methylisobutylketoxime)silane, vinyltris(methylisobutylketoxime)silane, vinyltriethoxysilane, dibutyltin ...

Embodiment 2

[0067] Identical to the preparation method of Example 1, the difference is that the formula is different, specifically, the formula table of the present embodiment is as follows:

[0068] Hydroxyl-terminated polydimethylsiloxane (80000cp, 25°C) 80%;

[0069] Methyl tris (methyl isobutyl ketoximino) silane 1%;

[0070] Vinyl tri(methyl isobutyl ketoximino)silane 5%;

[0071] Vinyltriethoxysilane 0.5%;

[0072] Orthoethyl silicate 0.01%;

[0073] Phenyl MQ silicone resin 2%;

[0074] Silica 11.42%;

[0075] Dibutyltin dilauryl 0.02%;

[0076] Corning filler dispersion aid Z-6173 0.05%.

Embodiment 3

[0078] Identical to the preparation method of Example 1, the difference is that the formula is different, specifically, the formula table of the present embodiment is as follows:

[0079] Hydroxy-terminated polydimethylsiloxane (60000cp, 25°C) 64%;

[0080] Methyl tris (methyl isobutyl ketoximino) silane 3%;

[0081] Vinyl tris(methyl isobutyl ketoximino)silane 1%;

[0082] Vinyltriethoxysilane 3%;

[0083] Tetraethyl orthosilicate 0.1%;

[0084] Phenyl MQ silicone resin 5%;

[0085] Silica 23.77%;

[0086] Dibutyltin dilauryl 0.1%;

[0087] Corning filler dispersion aid Z-6173 0.03%.

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Abstract

The invention belongs to the field of organic silicon, and discloses a gasket-free rubber for automobile engines, which comprises the following components in weight percent: 60-80% of hydroxyl-terminated polydimethylsiloxane; methyl tris(methyl isobutyl ketoxime) ) silane 1‑3%; vinyl tris (methyl isobutyl ketoxime) silane 1‑5%; vinyl triethoxysilane 0‑5%; tetraethyl orthosilicate 0.01‑0.1%; phenyl MQ silicone resin 2‑5%; silicon dioxide 5‑25%; dibutyltin dilauryl 0‑0.1%; The purpose of drying and not releasing VOC. At the same time, the invention also discloses a preparation method of the pad-free glue.

Description

technical field [0001] The invention relates to the field of organosilicon modification, in particular to an automobile engine gasket-free rubber and a preparation method thereof. Background technique [0002] Using ketoximosilane as a crosslinking agent to modify silicone rubber is a common method in this field. For details, please refer to the comparison document below. [0003] The applicant Dongguan Zhaoshun Silicone Technology Co., Ltd. filed an invention patent application CN201810175826.X, which discloses a method for preparing an organosilicon polymer. The preparation method includes the following steps (1) making the raw material butanone oxime Hydrolyze base silane to remove the butanone oxime produced by hydrolysis, then add higher alcohol to it for condensation reaction, vacuum treatment to remove remaining small molecules, and obtain condensation product; (2) Add to the condensation product obtained in step (1) Dialkylcyclosiloxane and catalyst, keep the vacuu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/02C08K5/5465C08K5/5415C08K5/5425C08K3/36
CPCC08K2201/014C08L83/04C08L2205/025C08K13/02C08K5/5465C08K5/5415C08K5/5425C08K3/36
Inventor 王长杰刘正辉杨丽芳
Owner 广州信粤新材料科技有限公司
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