Preparation method of organic silicon pressure-sensitive adhesive

Abstract

The invention discloses a preparation method of an organic silicon pressure-sensitive adhesive. The method comprises the following steps: 1) dissolving hydroxyl-terminated silicone oil and MQ silicon resin with an organic solvent with a boiling point or azeotropic point between 80 DEG C and 100 DEG C, adding a catalyst and a dewatering agent, carrying out a reflux reaction at 80-100 DEG C for 105 h, cooling to room temperature, and filtering to remove insoluble substances to obtain base rubber; and then adding a vulcanizing agent and an accelerant, and uniformly stirring at room temperature. The preparation method of the organosilicone pressure-sensitive adhesive is simple, toxic carcinogenic or environment-polluting organic solvents such as methylbenzene and dimethylbenzene are not used, meanwhile, the steps of high-temperature reaction at 110 DEG C or above or reduced pressure distillation and the like are not needed, and equipment investment, energy consumption and potential safety hazards are reduced.

Description

technical field [0001] The invention belongs to the field of pressure-sensitive adhesives, in particular to a method for preparing silicone pressure-sensitive adhesives. Background technique [0002] Silicone pressure-sensitive adhesive is a kind of high-quality and high-grade special pressure-sensitive adhesive, especially its high temperature resistance, adhesion to some low surface energy surfaces, electrical insulation and chemical inertness, etc. are not available for other types of pressure-sensitive adhesives. comparable. Therefore, this type of pressure-sensitive adhesive has been widely used to prepare medical tape or various high-temperature-resistant tapes, including wave soldering shielding film (gold finger tape) in the process of printed circuit boards, H-class electrical insulating tape, and mica tape for fire-resistant wires. and plating masking tape, etc. [0003] Silicone pressure-sensitive adhesives are usually made of permethyl-type or silicone rubber a...

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Problems solved by technology

[0007] In order to overcome the shortcomings of the existing traditional high-temperature vulcanized silicone pressure-sensitive adhesives, the present invention provides a method for preparing silicone pressure-sensitive adhesives, which does not use toxic carcinogenic or environmental pollution organic solvents such as toluene and xylene At the same time, there is no need for high-temperature reaction at 110°C or above or vacuum distillation, which reduces the resulting high equipment requirements, high energy consumption, and safety hazards.

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