Hot-adhesion-release polyacrylic acid pressure-sensitive adhesive and preparation method thereof

Abstract

The invention discloses a hot-adhesion-release polyacrylic acid pressure-sensitive adhesive. The polyacrylic acid pressure-sensitive adhesive consists of the following components in parts by weight: 40-50 parts of isooctyl acrylate, 20-30 parts of methyl acrylate, 5-10 parts of hydroxyethyl acrylate, 10-30 parts of a mixed solvent, 0.5-2 parts of a thiol compound, 0.1-0.5 part of S-1-allyl(Z)-2-allyl thiosulfinate, 0.5-1 part of benzoyl peroxide and 0.1-0.3 part of mixed wax, wherein the mixed wax is a mixture of polyethylene wax, microcrystalline wax and montan wax. The mixed wax, namely thepolyethylene wax, the microcrystalline wax and the montan wax, is added for mixing, and the melting point of the montan wax is approximately 75-86 DEG C, so that the mixed wax mainly exerts functionsof melting at a high temperature, reducing viscosity and facilitating stripping; the polyethylene wax is common wax, and a degumming phenomenon occurs after the temperature is increased; and the microcrystalline wax has high viscosity, has ductility, is not fragile at a low temperature, and has functions of separating and precipitating the polyethylene wax and the melted montan wax at a high temperature. This series of wax allows the pressure-sensitive adhesive in the first embodiment to still be normally used after cooling from high temperatures.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to a thermally debonded polyacrylic pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Pressure sensitive adhesive is the abbreviation of pressure sensitive adhesive. It is a class of adhesives that are sensitive to pressure. It is mainly used in the preparation of pressure-sensitive adhesive tapes. [0003] The pressure-sensitive adhesive has a certain initial adhesion during use. Generally, the initial adhesion is small. After an external force is applied, it will have a stronger adhesion and play a better adhesion effect. After a certain period of use, the pressure-sensitive adhesive will It often needs to be torn off, but in the tearing process, it will be difficult to be torn off. Contents of the invention [0004] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a thermally debonded poly...

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Problems solved by technology

[0003] The pressure-sensitive adhesive has a certain initial adhesion during use. Generally, the initial adhesion is small. After an external force is applied, it will have a stronger adhesion and play a better adhesion effect. After a certain period of use, the pressure-sensitive adhesive will It often needs to be torn off, but in the tearing process, it will be difficult to be torn off

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