Organic silicon coating adhesive and preparation method thereof

A coating technology and silicone technology, which is applied in the field of silicone coating and its preparation, can solve the problems of low hardness and general anti-friction performance of the silicone coating, and is suitable for large-scale production, easy to scale up, simple craftsmanship

Active Publication Date: 2019-12-20
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the silicone coating rubber in the prior art generally has low hardness and general anti-friction performance.

Method used

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  • Organic silicon coating adhesive and preparation method thereof
  • Organic silicon coating adhesive and preparation method thereof
  • Organic silicon coating adhesive and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0073] The present invention also provides a method for preparing the silicone coating glue described in the above technical solution, comprising the following steps:

[0074] Mix the modified silicone resin, cross-linking agent, catalyst, ultraviolet indicator and tackifier evenly to obtain the silicone coating glue.

[0075] The invention uniformly mixes the modified silicone resin, the crosslinking agent, the catalyst, the ultraviolet indicator and the tackifier to obtain the organosilicon coating glue. In the present invention, the modified silicone resin, cross-linking agent, catalyst, ultraviolet indicator and tackifier are the same as those described in the above technical solution, and will not be repeated here.

[0076] The preparation method provided by the invention has simple process, is easy to scale up, and is suitable for large-scale production.

[0077] The invention provides a silicone coating glue, comprising the following components: 100 parts by weight of ...

Embodiment 1

[0081](1) Take 5kg of phenyltrimethoxysilane and 7kg of toluene and add them to the reactor, then add 5g of hydrochloric acid, and then gradually add 1.363kg of water into the reactor within 0.5h under the protection of nitrogen. Raise the temperature to 40°C for 10 hours; after the reaction, let stand to separate layers, remove the upper water layer, then add 4 kg of hydroxyl-terminated polydimethylsiloxane at 50 mPa·s, then add 0.05 g of ferric chloride, and heat up to React at 90°C for 8 hours; after the reaction, cool down to 80°C, add 2.5kg of methyltrimethoxysilane and 2g of tetrabutyl titanate, and react at 80°C for 5h; after the reaction, remove excess methyltrimethoxysilane And part toluene, obtain the product of solid content 80%; The expression of this product is:

[0082]

[0083] In formula (I), a+b+c=1, a=0.71, b=0.14, c=0.15; n is an integer ≥1.

[0084] (2) Add 3wt% methyltrimethoxysilane, 2wt% tetrabutyl titanate, 0.01wt% 2-(2-hydroxyl-5-methylphenyl) to t...

Embodiment 2

[0086] (1) Get 5kg of phenyltrimethoxysilane and 10kg of toluene and join in the reactor, then add 7g of trifluoromethanesulfonic acid, then gradually drop 1.636kg of water into the reactor within 1h under the protection of nitrogen, After the addition of water drops, raise the temperature to 70°C and react for 6.5 hours; after the reaction, let stand to separate and separate the upper water layer, then add 4.5 kg of hydroxyl-terminated polydimethylsiloxane at 1000 mPa·s, and then add iron octoate 0.1g, heat up to 100°C for 6 hours; after the reaction, cool down to 90°C, add 1.5kg of methyltrimethoxysilane and 2.6g of isopropyl titanate, and react at 90°C for 3h; evaporate the excess Methyltrimethoxysilane and part toluene, obtain the product of solid content 75%; The expression of this product is:

[0087]

[0088] In formula (I), a+b+c=1, a=0.85, b=0.11, c=0.04; n is an integer ≥1.

[0089] (2) Add 2wt% tetraethoxysilane, 1.5wt% tetrabutyl titanate, 0.012wt% 2,4-dihydrox...

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Abstract

The invention provides an organic silicon coating adhesive, which comprises, by weight, 100 parts of a modified silicon resin, 1-5 parts of a cross-linking agent, 0.5-3 parts of a catalyst, 0-0.2 partof an ultraviolet indicator, and 0-1 part of a tackifier, wherein the modified silicon resin has a general formula represented by a formula (I), a+b+c is 1, a is greater than 0 and less than 1, b isgreater than 0 and less than 1, c is greater than or equal to 0 and less than 1, and n is an integer of greater than or equal to 1. Compared with the organic silicon coating adhesive in the prior art,the organic silicon coating adhesive of the invention has the following characteristics that the modified silicon resin with the specific general formula is used as the main component, and is matchedwith other components with specific contents to achieve good interaction, such that the organic silicon coating adhesive has high hardness while various properties of the organic silicon coating adhesive meet the coating requirements of circuit boards, the cured adhesive surface is smooth and has excellent friction resistance, and the good protection effect can be achieved by coating the surfaceof a circuit board with a thin layer of the organic silicon coating adhesive.

Description

technical field [0001] The invention relates to the technical field of circuit board coating, and more specifically relates to a silicone coating glue and its preparation method and application. Background technique [0002] With the continuous expansion of the application fields and environments of electronic products, how to improve the service life and stability of electronic products has become an increasingly important issue. Coating a layer of protective film on the surface of the circuit board can effectively improve the service life of the circuit board. Silicone products have been widely used in the coating protection of circuit boards due to their excellent high and low temperature resistance and weather resistance. Applications. [0003] The Chinese patent with the publication number CN103666250A discloses a silicone coating glue, which uses hydroxyl-terminated polydimethylsiloxane as the base glue, MQ resin as the reinforcing agent, and adds tackifier, diluent, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/10C08G77/44C08G77/06
CPCC08G77/06C08G77/44C09D183/10
Inventor 郝开强李镕俊王聪伟陈丹陶小乐何永富
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD
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