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A kind of silicone adhesion promoter and preparation method and application thereof

An adhesion promoter and silicone technology, applied in the direction of adhesives, polymer adhesive additives, adhesive additives, etc., can solve the problems of inability to meet the needs of use, decrease in bonding strength, flow, etc., and improve the adhesion. Effects of performance and mechanical properties, mechanical strength enhancement, cohesion enhancement

Active Publication Date: 2022-01-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Acrylate-based adhesion promoters have good adhesion and fast curing speed, and are widely used in the modification of silicone rubber. However, because the glass transition temperature of polyacrylate is generally low, with the increase of ambient temperature , the movement of the polyacrylate molecular chain is accelerated, the adhesive layer will become soft or even flow, and the bonding strength will be greatly reduced
In addition, if the humidity of the operating environment during bonding is too high, it is also prone to frosting and whitening, so it cannot meet the needs of use under harsh conditions such as humidity and heat.

Method used

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  • A kind of silicone adhesion promoter and preparation method and application thereof
  • A kind of silicone adhesion promoter and preparation method and application thereof
  • A kind of silicone adhesion promoter and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of organosilicon adhesion promoter, its preparation method comprises the following steps:

[0054] 1) Add 10g of isopropanol, 1.64g of eugenol (containing 0.01mol of C=C) and 3.78g of hydrogen-containing silicone oil (containing 0.03mol of Si-H) at 25°C 100mL reaction kettle, stirred for 30min, then slowly added 0.01g of Karstedt platinum catalyst with a platinum concentration of 2000ppm into the reaction kettle, raised the temperature to 80°C after the addition, and reacted for 3h to obtain polysiloxane containing phenolic hydroxyl groups;

[0055] 2) 10 g of isopropanol, 0.02 g of Karstedt platinum catalyst with a platinum concentration of 2000 ppm, and 3.01 g of tripropylene glycol diacrylate (containing 0.02 mol of C=C) were mixed and stirred for 20 minutes at 20° C. to prepare a mixed solution, Slowly add it dropwise to the phenolic hydroxyl-containing polysiloxane in step 1) at 60°C, finish adding in 1 hour, then continue to react for 3 hours, then add activa...

Embodiment 2

[0070] A kind of organosilicon adhesion promoter, its preparation method comprises the following steps:

[0071] 1) At 40° C., 10 g of tetrahydrofuran, 1.34 g of 2-allylphenol (containing 0.01 mol of C=C) and 1.34 g of hydrogen-containing MQ silicone resin with a hydrogen content of 1.5 wt % (containing 0.02 mol of Si -H) Add a 100mL reaction kettle, stir for 40min, then slowly add 0.06g of tetrahydrofuran solution of chloroplatinic acid with a platinum concentration of 4000ppm into the reaction kettle, heat up to 60°C after the addition, and react for 3h to obtain polysilicon containing phenolic hydroxyl groups Oxygen;

[0072] 2) Mix 10 g of tetrahydrofuran, 0.09 g of tetrahydrofuran solution of chloroplatinic acid with a platinum concentration of 4000 ppm, and 12.10 g of tripropylene glycol diacrylate (containing 0.04 mol of C=C) at 25°C for 30 minutes to prepare a mixed solution , and then slowly added dropwise to the polysiloxane containing phenolic hydroxyl groups in st...

Embodiment 3

[0076] A kind of organosilicon adhesion promoter, its preparation method comprises the following steps:

[0077] 1) Mix 10g of ethanol and 1.33g of 3',5-di-2-propenyl-1,1'-biphenyl-2,4'-diphenol (containing 0.01mol of C=C) at 10°C Add 3.03g of hydrogen-containing silicone oil (containing 0.03mol of Si-H) with a hydrogen content of 1.0wt% into a 100mL reactor, stir for 30min, then slowly add 0.05g of Karstedt platinum catalyst with a platinum concentration of 3000ppm into the reactor, and finish adding Afterwards, the temperature was raised to 50°C and reacted for 2 hours to obtain polysiloxane containing phenolic hydroxyl groups;

[0078] 2) Mix 10 g of ethanol, 0.04 g of Karstedt platinum catalyst with a platinum concentration of 3000 ppm, and 2.26 g of 1,6-hexanediol diacrylate (containing 0.02 mol of C=C) at 40°C for 40 minutes to form a mixture Solution, then slowly added dropwise to the polysiloxane containing phenolic hydroxyl group in step 1) at 75°C, the addition was ...

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Abstract

The invention discloses a silicone adhesion promoter, its preparation method and application. The organosilicon adhesion promoter of the present invention is obtained by hydrosilylation reaction of phenolic hydroxyl-containing polysiloxane and acrylate compounds; the phenolic hydroxyl-containing polysiloxane is obtained from a phenolic compound containing It can be obtained by hydrosilylation reaction with hydrogen-containing polysiloxane. The preparation method of the silicone adhesion promoter of the present invention comprises the following steps: 1) carry out the hydrosilylation reaction of the phenolic compound containing the carbon-carbon double bond and the hydrogen-containing polysiloxane, obtain the polysiloxane containing the phenolic hydroxyl group ; 2) carry out the hydrosilylation reaction of acrylate compounds and polysiloxanes containing phenolic hydroxyl groups to obtain organic silicon adhesion promoters. The organosilicon adhesion promoter of the invention is simple to prepare, has wide source of raw materials, low cost, and is easy to realize industrialized production. It can not only significantly improve the adhesive performance and mechanical performance of ALSR, but also meet the use requirements in hot and humid environments.

Description

technical field [0001] The invention relates to the technical field of organic silicon materials, in particular to an organic silicon adhesion promoter and its preparation method and application. Background technique [0002] Addition liquid silicone rubber (ALSR) has the advantages of good insulation, good weather resistance, and good dimensional stability. It is widely used in the fields of automobile manufacturing, aerospace, architectural decoration, and electronic potting. However, since the main chain of the ALSR molecular chain is composed of silicon and oxygen atoms alternately arranged at intervals and bonded in a helical three-dimensional configuration, and the side groups are non-polar organic groups, the polarity of the bonds will be offset and a Non-polar or weakly polar state, low surface energy, and lack of reactive groups, poor adhesion to plastic and metal substrates, greatly limiting its further application. [0003] With the rapid development of modern in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C09J183/07C09J183/06C09J11/08
CPCC08G77/38C09J183/04C09J11/08C08L2205/035C08L2205/02C08L83/06
Inventor 赖学军曾运生曾幸荣李红强刘政宇
Owner SOUTH CHINA UNIV OF TECH
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