Addition type liquid silicone rubber tackifier, as well as preparation method and application thereof

A liquid silicone rubber and tackifier technology, which is applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of complex synthesis process, high cost, production danger, etc., achieve simple synthesis process, solve sticky The effect of solving adhesion problems and improving adhesive performance

Inactive Publication Date: 2017-01-04
岳胜武
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are three main methods for bonding addition-type liquid silicone rubber to other materials: ①Primer treatment of the surface of the substrate: the use of a primer can make liquid silicone rubber and the substrate strongly bonded, but this method has complicated procedures and is difficult to produce structures Complicated parts; at the same time, the primer contains volatile and flammable solvents, causing transportation and production hazards, endangering the health and safety of production personnel and polluting the environment
② Improve the adhesive performance by changing the molecular structure of polysiloxane: graft functional groups such as hydroxyl, ester, epoxy, phenyl and alkoxy groups onto the polysiloxane molecular chain, thereby increasing the addition type The bonding performance of liquid silicone rubber to the substrate, but due to the complex synthesis process and high cost, its application is limited
Chinese patent CN103360422A discloses a tackifier synthesized with 1,6-hexane

Method used

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  • Addition type liquid silicone rubber tackifier, as well as preparation method and application thereof

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Example Embodiment

[0031] See further figure 1 , The present invention also provides a method for preparing an addition type liquid silicone rubber tackifier, which includes the following steps:

[0032] Step S1, mixing 80-120 parts of acrylic compound containing phenyl and ester groups with 0.006-0.06 parts of platinum catalyst solution with a mass concentration of 0.05-0.5% and preheating in a certain temperature environment for a period of time to form a mixed solution, Ready for use; wherein the temperature environment in this step is 40-80°C, and the preheating time is 30-60 min; and the platinum catalyst in this step accounts for 0.5-10 ppm of the mass of acrylic compounds containing phenyl and ester groups; Phenyl / ester group acrylic compounds are acrylic compounds containing phenyl / ester group, diallyl phthalate, allyl acetoacetate, 1,4-butanediol diacrylate, methacrylic acid shrinkage One or more of glycerides; the platinum catalyst is Speier catalyst or Karstedt catalyst or chloroplatinic...

Example Embodiment

[0044] Example 1

[0045] 1. Synthesis of Tackifier

[0046] Mix 62 g of terephthalic acid diacrylate and 0.10 g of 4000 ppm platinum-divinyl tetramethyl disiloxane complex in a round bottom flask, and then preheat it at 50° C. for 50 minutes, and then set aside.

[0047] Add 120g of tetramethylcyclotetrasiloxane, 200g of toluene, and 0.25g of p-hydroxyanisole into a four-necked flask with a thermometer and a reflux tube, stir under the protection of nitrogen and raise the temperature to 60°C, then preheat it. The mixture of terephthalic acid diacrylate and platinum-divinyl tetramethyl disiloxane complex was slowly dropped into the four-necked flask, and the dropping time was 2 hours. After the addition was completed, the reaction temperature was controlled at 65°C for 2h. Then add 20 g of coconut shell activated carbon particles to the four-necked flask for 2 hours. Finally, the reaction liquid is filtered and rotary steamed to obtain the final product, which is referred to as th...

Example Embodiment

[0052] Example 2

[0053] 1. Synthesis of Tackifier

[0054] Mix 71 g of glycidyl methacrylate and 0.10 g of 4000 ppm platinum-divinyl tetramethyl disiloxane complex in a round bottom flask, and then preheat it at 50° C. for 50 min, and set aside.

[0055] Add 120g of tetramethylcyclotetrasiloxane, 200g of toluene, and 0.15g of p-hydroxyanisole into a four-necked flask with a thermometer and a reflux tube, stir under the protection of nitrogen and raise the temperature to 60°C, then preheat it. The mixture of glycidyl methacrylate and platinum-divinyltetramethyldisiloxane complex was slowly dropped into the four-necked flask, and the dropping time was 1h. After the addition was completed, the reaction temperature was controlled at 80°C for 4 hours. Then add 20 g of coconut shell activated carbon particles to the four-necked flask for 2 hours. Finally, the reaction solution is filtered and rotary steamed to obtain the final product, which is referred to as thickener 2.

[0056] 2. A...

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Abstract

The invention discloses an addition type liquid silicone rubber tackifier, as well as a preparation method and application thereof. The preparation method comprises the following steps of step 1, mixing 80-120 parts of an acrylic compound containing phenyl groups and ester groups with 0.006-0.06 part of a platinum catalyst solution of which the mass concentration is 0.05-0.5% to obtain a mixture, and preheating the mixture at certain temperature environment for some time so as to obtain mixed liquor for standby application; step 2, adding 100-150 parts of D4H containing silicon-hydrogen bonds, 100-200 parts of toluene and 0.12-0.50 part of p-hydroxyanisole to a round-bottomed flask, and raising temperature while stirring; step 3, when the temperature in the round-bottomed flask reaches to 40-90 DEG C, dropwise adding the mixture in the step 1 to the round-bottomed flask; step 4, after the mixture is dropwise added, controlling the reaction temperature to 60-100 DEG C, and performing a reaction for 1-5h; and step 5, after the reaction is completed, cooling reaction fluid to room temperature, then adding activated carbon for adsorbing residual platinum catalysts, and finally performing sucking filtration and rotary evaporation on the reaction fluid so as to obtain the tackifier. According to the addition type liquid silicone rubber tackifier, as well as the preparation method and application thereof disclosed by the invention, a small quantity of the tackifiers are added to shaping liquid silicone rubber, so that the bonding failure between the shaping liquid silicone rubber and PC plastic cement reaches to 100% cohesive failure.

Description

technical field [0001] The invention relates to the technical field of silicone material bonding, in particular to an addition-type liquid silicone rubber tackifier, a preparation method and an application thereof. Background technique [0002] Addition-type liquid silicone rubber (LSR) is a non-toxic, odorless, silicone material with excellent moisture resistance, cold resistance, heat resistance, insulation, radiation and weather resistance. It is widely used in electronics, construction, automobiles, machinery, and medical treatment. and other fields. However, after the addition-type liquid silicone rubber is cured, most of the molecular surfaces are non-polar groups, resulting in very poor adhesion between the addition-type liquid silicone rubber and other materials. Therefore, the addition-type liquid silicone rubber is modified so that it has a strong bonding effect with other materials. [0003] There are three main methods for bonding addition-type liquid silicone ...

Claims

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Application Information

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IPC IPC(8): C08G77/38C08G77/12C08G77/06C09J183/07C09J11/08C09J11/04C09J11/06
CPCC08G77/06C08G77/12C08G77/38C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J183/04C08L83/04C08K13/02C08K3/36C08K5/544
Inventor 岳胜武李龙谢海龙
Owner 岳胜武
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