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Trapezoidal silicon resin reinforced organic silicon pressure-sensitive adhesive and preparation method thereof

A technology of silicone pressure-sensitive adhesive and silicone resin, which is applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problem of poor uniformity, compatibility and dispersibility that cannot promote the dispersion and reinforcement effect of MQ silicone resin and other problems, to achieve the effect of improving peel strength and high temperature stickiness, improving reinforcement effect, and improving transparency

Active Publication Date: 2021-03-12
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the cage polysilsesquioxane that this patent uses is trisilanol phenyl silsesquioxane, trisilanol isobutyl silsesquioxane, belongs to oxygen bridging ladder polysiloxane, although can be in Improve heat resistance to a certain extent, but its own compatibility and dispersion are poor, let alone promote the dispersion of MQ silicone resin to improve the uniformity of the reinforcing effect

Method used

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  • Trapezoidal silicon resin reinforced organic silicon pressure-sensitive adhesive and preparation method thereof
  • Trapezoidal silicon resin reinforced organic silicon pressure-sensitive adhesive and preparation method thereof
  • Trapezoidal silicon resin reinforced organic silicon pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A trapezoidal silicone resin-reinforced silicone pressure-sensitive adhesive of the present embodiment consists of the following components in parts by weight:

[0055] 100 parts of methyl vinyl silicone rubber (the number average molecular weight is 500,000, and the vinyl content is 0.75%), 100 parts of MQ silicone resin (molecular weight 3000-4000, M / Q=0.75-0.8), 10 parts of trapezoidal reinforced silicone resin , 10 parts of hydrogen-containing silicone oil (viscosity is 50mPa·s, hydrogen content is 0.3%), 1 part of inhibitor silanized acetylenic alcohol, platinum catalyst 1,3-divinyl-1,1,3,3-tetramethyl Platinum disiloxane (0), (10 ppm based on platinum content), 200 parts of diluting solvent toluene.

[0056] The trapezoidal reinforced silicone resin is prepared by the following method:

[0057] (1) Preparation of Methylpolysiloxane Ladder Prepolymer:

[0058] In a four-necked flask equipped with a constant-pressure dropping funnel, a reflux condenser, a thermome...

Embodiment 2

[0077] A trapezoidal silicone resin-reinforced silicone pressure-sensitive adhesive of the present embodiment consists of the following components in parts by weight:

[0078] 100 parts of hydroxyl-terminated silicone rubber (average molecular weight 600,000), 100 parts of MQ silicone resin (molecular weight 3000-4000, M / Q=0.75-0.8), 10 parts of trapezoidal reinforced silicone resin, 1.6 parts of organic peroxide catalyst BOP, Dilute 200 parts of solvent toluene.

[0079] The trapezoidal reinforced silicone resin is prepared by the following method:

[0080] (1) Preparation of Methylpolysiloxane Ladder Prepolymer:

[0081] In a four-neck flask equipped with a constant-pressure dropping funnel, a reflux condenser, a thermometer, and an electric stirrer, add vinyl-terminated tetramethyldisiloxane (vinyl double-capped, a=0, M n =186)) and isopropanol solvent, stir and dissolve evenly, heat up to 80°C under nitrogen protection, add the calculated amount of chloroplatinic acid ca...

Embodiment 3

[0090] A trapezoidal silicone resin-reinforced silicone pressure-sensitive adhesive of the present embodiment consists of the following components in parts by weight:

[0091] 100 parts of hydroxyl-terminated silicone rubber (average molecular weight 600,000), 100 parts of MQ silicone resin (molecular weight 3000-4000, M / Q=0.75-0.8), 10 parts of trapezoidal reinforced silicone resin, 1.6 parts of organic peroxide catalyst BOP, Dilute 200 parts of solvent toluene.

[0092] The trapezoidal reinforced silicone resin is prepared by the following method:

[0093] (1) Preparation of Methylpolysiloxane Ladder Prepolymer:

[0094] In a four-neck flask equipped with a constant-pressure dropping funnel, a reflux condenser, a thermometer, and an electric stirrer, add vinyl-terminated polydimethylsiloxane (a=8, average molecular weight M n 800) and ethylene glycol monoethyl ether solvent, stir and dissolve evenly, heat up to 80°C under nitrogen protection, add the calculated amount of 1...

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Abstract

The invention belongs to the technical field of silicon rubber, and discloses a trapezoidal silicon resin reinforced organic silicon pressure-sensitive adhesive and a preparation method thereof. The organosilicone pressure-sensitive adhesive comprises an addition reaction cured pressure-sensitive adhesive composed of methyl vinyl silicone rubber, MQ silicone resin, trapezoidal reinforced siliconeresin and hydrogen-containing silicone oil, or a peroxide cured pressure-sensitive adhesive composed of hydroxyl-terminated silicone rubber, MQ silicone resin and trapezoidal reinforced silicone resin. The trapezoidal silicon resin is prepared by adding a specific method into the pressure-sensitive adhesive, so that the silicon resin can enhance the peel strength and high-temperature persistent viscosity, and also has the effects of promoting the dispersion of MQ silicon resin and enhancing the transparency of the product. The obtained organic silicon pressure-sensitive adhesive has no shrinkage cavity phenomenon in the curing process, has no residue after stripping, and has a great market prospect.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber, and in particular relates to a trapezoidal silicone resin-reinforced silicone pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Silicone pressure-sensitive adhesives can bond low surface energy surfaces due to their good high and low temperature resistance, chemical resistance and low dielectric properties. This makes silicone pressure-sensitive adhesive tapes widely used in industrial production in the form of splicing tapes, electrical tapes, plasma spraying tapes, and mechanical processing tapes. And because of its non-toxic, non-irritating, physiologically inert, wide temperature range, suitable bonding strength and drug permeability, it is also widely used in medical treatment and transdermal therapeutic system preparations. [0003] The main body of silicone pressure-sensitive adhesive is mixed with liquid silicone rubber and MQ silicone re...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/04C09J11/08C08G77/44C08G77/38C08G77/20
CPCC09J183/04C09J11/08C08G77/44C08G77/38C08G77/20C08L2205/025C08L2205/035C08L2201/08C08L2201/10C08L83/04C08L83/10
Inventor 李泽勇姚坤满郑贵明柳晨醒何海曾祥雷
Owner GUANGZHOU TINCI MATERIALS TECH