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Odorless addition type liquid silicone rubber tackifier and preparation method and application thereof

A liquid silicone rubber, addition molding technology, used in adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of decreased adhesion performance, poor compatibility, restricted use, etc., to improve adhesion. Performance, simple synthesis process, good adhesion effect

Inactive Publication Date: 2018-06-15
SHENZHEN KANGLIBANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor adhesion of addition-type liquid silicone rubber limits its use. Therefore, how to improve the adhesion of addition-type liquid silicone rubber has always been a research hotspot in this field.
[0003] In the invention patent with the publication number CN103351467A, an addition-type liquid silicone rubber adhesion promoter and its preparation method and application are disclosed. The synthesis of alcohol diacrylate by hydrosilylation reaction, adding the adhesion promoter to the addition-type liquid silicone rubber can make the silicone rubber and plastic bond well, but for high-hardness addition-type liquid silicone rubber (70A) , its adhesive performance drops sharply, which limits its use
[0004] In the invention patent with the publication number CN103360422A, a modified hydrogen-containing cyclotetrasiloxane adhesion promoter and its preparation method and application are disclosed. The adhesion promoter is passed through 1,6-hexanediol diacrylate Synthesized by reacting with tetramethylcyclotetrasiloxane, adding this adhesion promoter to addition-type liquid silicone rubber can form adhesion to aromatic polycarbonate, but its adhesion damage to PC is 40%-60% % cohesive failure rate, cannot reach 100% cohesive failure
[0005] In the invention patent with the publication number CN102675884A, an addition-curable self-adhesive silicone rubber composition is disclosed, which is through the hydrosilylation reaction of phenyl-containing hydrogen silicone oil and allyl glycidyl ether Synthesis, the tackifier can achieve bonding with silicone and thermoplastics, but the cost of synthetic raw materials is high, which limits its use
[0006] Although there have been reports on tackifiers for improving the adhesion of addition-type liquid silicone rubber, most of these studies have problems such as poor compatibility, decreased mechanical properties, and high cost, which have affected the addition-type liquid silicone rubber tackifier. Application and promotion in industrial production

Method used

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  • Odorless addition type liquid silicone rubber tackifier and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Synthesis of tackifier

[0030] 30 parts of terephthalic acid diacrylate, 0.05 parts of 4000 ppm platinum-divinyltetramethyldisiloxane complex and 30 parts of toluene were uniformly mixed in a round-bottomed flask before use.

[0031] Put 80 parts of phenyl hydrogen-containing silicone oil and 80 parts of toluene into a four-necked flask with a thermometer and a condensing reflux tube, stir and heat up to 60°C under nitrogen protection, diacrylate terephthalate and platinum-divinyl The mixture of tetramethyldisiloxane complex and toluene was slowly added dropwise into the four-neck flask, and the dropping time was 1 h. After the dropwise addition, the reaction temperature was controlled at 60° C. for 2 h. Then the reaction solution was cooled to room temperature, and finally the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as thickener 1.

[0032] 2. Application of tackifier

[0033]...

Embodiment 2

[0037] 1. Synthesis of tackifier

[0038] Mix 30 parts of diallyl phthalate, 1.0 part of 4000ppm platinum-divinyltetramethyldisiloxane complex, and 40 parts of ethyl acetate in a round-bottomed flask and set aside.

[0039] Add 120 parts of phenyl hydrogen-containing silicone oil and 240 parts of ethyl acetate into a four-necked flask with a thermometer and a condensing reflux tube, stir and heat up to 70°C under nitrogen protection, and diallyl phthalate and platinum - The mixture of divinyltetramethyldisiloxane complex and ethyl acetate was slowly added dropwise into the four-neck flask, and the dropping time was 2h. After the dropwise addition, the reaction temperature was controlled at 70° C. for 4 h. Then the reaction solution was cooled to room temperature, and finally the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as thickener 2.

[0040] 2. Application of tackifier

[0041] Mix 16 pa...

Embodiment 3

[0045] 1. Synthesis of tackifier

[0046] Mix 30 parts of bisphenol A diallyl ether, 1.5 parts of platinum-carbon catalyst, and 50 parts of butyl acetate in a round-bottomed flask for use.

[0047] Add 180 parts of phenyl hydrogen-containing silicone oil and 300 parts of butyl acetate into a four-necked flask with a thermometer and a condensing reflux tube, stir and heat up to 80°C under nitrogen protection, bisphenol A diallyl ether, platinum - The mixture of charcoal catalyst and butyl acetate was slowly added dropwise into the four-necked flask, and the dropping time was 2h. After the dropwise addition, the reaction temperature was controlled at 80° C. for 6 h. Then the reaction solution was cooled to room temperature, and finally the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as thickener 3.

[0048] 2. Application of tackifier

[0049] Mix 16 parts of vinyl-terminated polydimethylsiloxa...

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Abstract

The invention discloses an odorless addition type liquid silicone rubber tackifier and a preparation method and application thereof. The preparation method is as follows: mixing an organic compound containing phenyl and vinyl groups, a platinum catalyst and an organic solvent evenly for standby use; adding phenyl hydrogen-containing silicone oil and an organic solvent to a round bottom flask, heating up while stirring, and dropwise adding a mixture containing the organic compound containing the phenyl and vinyl groups, the platinum catalyst and the organic solvent into the round bottom flask whenthe temperature of the round bottom flask reaches 60-90DEG C for the adding time of 1-2h; after the adding is completed, controlling the reaction temperature at 60-100 DEG C for 1-8h; and after thereaction is completed, cooling a reaction solution to room temperature, filtering the reaction liquid by suction, and performing rotary evaporateion to get the tackifier. The preparation process is simple, the raw material is cheap and easy to obtain, the method is easy in industrial production, and the tackifier is colorless and tasteless, good in stability, has good compatibility with additiveliquid silicone rubber (LSR), and does not affect the odor and optical and mechanical properties of the LSR.

Description

technical field [0001] The invention relates to the technical field of silicone material bonding, in particular to an odorless addition type liquid silicone rubber tackifier and its preparation method and application. Background technique [0002] Addition-type liquid silicone rubber (LSR) is a non-toxic, odorless, silicone material with excellent weather resistance and electrical insulation. It is one of the high-grade silicone varieties that have developed rapidly in recent years. Mechanical, medical and other fields. However, the poor adhesion of addition-type liquid silicone rubber limits its use. Therefore, how to improve the adhesion of addition-type liquid silicone rubber has always been a research hotspot in this field. [0003] In the invention patent with the publication number CN103351467A, an addition-type liquid silicone rubber adhesion promoter and its preparation method and application are disclosed. The synthesis of alcohol diacrylate by hydrosilylation rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C09J11/08C09J183/07
CPCC08G77/38C08L2205/025C08L2205/035C09J11/08C09J183/04C08L83/04C08L83/06C08K3/36
Inventor 邓鹿燕
Owner SHENZHEN KANGLIBANG TECH
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