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

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 ...

Examples

preparation example Construction

[0031] see further figure 1 , the present invention also provides a kind of preparation method of addition type liquid silicone rubber tackifier, comprises the following steps:

[0032] Step S1, mixing 80-120 parts of acrylic compounds containing phenyl and ester groups with 0.006-0.06 parts of a platinum catalyst solution with a mass concentration of 0.05-0.5%, and preheating for a period of time under a certain temperature environment to form a mixed solution, It is 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 the step accounts for 0.5-10ppm of the mass of the acrylic compound containing phenyl and ester groups; Acrylic compounds with phenyl / ester groups are acrylic compounds containing phenyl / ester groups, diallyl phthalate, allyl acetoacetate, 1,4-butanediol diacrylate, methacrylate shrink One or more of glycerides; the platinum catalyst is Speier catalyst or Karstedt catalys...

Embodiment 1

[0045] 1. Synthesis of tackifier

[0046] Mix 62g of terephthalic acid diacrylate and 0.10g of 4000ppm platinum-divinyltetramethyldisiloxane complex in a round-bottomed flask, preheat at 50°C for 50min, and 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 condensing reflux tube, stir and heat up to 60°C under nitrogen protection, and place the preheated The mixture of terephthalic acid diacrylate and platinum-divinyltetramethyldisiloxane complex was slowly added dropwise into a four-neck flask, and the dropping time was 2 hours. After the dropwise addition, the reaction temperature was controlled at 65° C. for 2 h. Then add 20g of coconut shell activated carbon particles to the four-necked flask and the adsorption time is 2h. Finally, the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as...

Embodiment 2

[0053] 1. Synthesis of tackifier

[0054] Mix 71g of glycidyl methacrylate and 0.10g of 4000ppm platinum-divinyltetramethyldisiloxane complex in a round-bottomed flask, preheat at 50°C for 50min, 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 condensing reflux tube, stir and heat up to 60°C under nitrogen protection, and place the preheated The mixture of glycidyl methacrylate and platinum-divinyltetramethyldisiloxane complex was slowly added dropwise into a four-neck flask for 1 h. After the dropwise addition, the reaction temperature was controlled at 80° C. for 4 h. Then add 20g of coconut shell activated carbon particles to the four-necked flask and the adsorption time is 2h. Finally, the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as viscosifier 2.

[0056] 2. Application ...

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 ...

Examples

preparation example Construction

[0031] see further figure 1 , the present invention also provides a kind of preparation method of addition type liquid silicone rubber tackifier, comprises the following steps:

[0032] Step S1, mixing 80-120 parts of acrylic compounds containing phenyl and ester groups with 0.006-0.06 parts of a platinum catalyst solution with a mass concentration of 0.05-0.5%, and preheating for a period of time under a certain temperature environment to form a mixed solution, It is 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 the step accounts for 0.5-10ppm of the mass of the acrylic compound containing phenyl and ester groups; Acrylic compounds with phenyl / ester groups are acrylic compounds containing phenyl / ester groups, diallyl phthalate, allyl acetoacetate, 1,4-butanediol diacrylate, methacrylate shrink One or more of glycerides; the platinum catalyst is Speier catalyst or Karstedt catalys...

Embodiment 1

[0045] 1. Synthesis of tackifier

[0046] Mix 62g of terephthalic acid diacrylate and 0.10g of 4000ppm platinum-divinyltetramethyldisiloxane complex in a round-bottomed flask, preheat at 50°C for 50min, and 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 condensing reflux tube, stir and heat up to 60°C under nitrogen protection, and place the preheated The mixture of terephthalic acid diacrylate and platinum-divinyltetramethyldisiloxane complex was slowly added dropwise into a four-neck flask, and the dropping time was 2 hours. After the dropwise addition, the reaction temperature was controlled at 65° C. for 2 h. Then add 20g of coconut shell activated carbon particles to the four-necked flask and the adsorption time is 2h. Finally, the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as...

Embodiment 2

[0053] 1. Synthesis of tackifier

[0054] Mix 71g of glycidyl methacrylate and 0.10g of 4000ppm platinum-divinyltetramethyldisiloxane complex in a round-bottomed flask, preheat at 50°C for 50min, 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 condensing reflux tube, stir and heat up to 60°C under nitrogen protection, and place the preheated The mixture of glycidyl methacrylate and platinum-divinyltetramethyldisiloxane complex was slowly added dropwise into a four-neck flask for 1 h. After the dropwise addition, the reaction temperature was controlled at 80° C. for 4 h. Then add 20g of coconut shell activated carbon particles to the four-necked flask and the adsorption time is 2h. Finally, the reaction solution was subjected to suction filtration and rotary evaporation to obtain the final product, which was designated as viscosifier 2.

[0056] 2. Application ...

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