High-temperature-resisting pressure-sensitive adhesive for adhesive tape, adhesive tape and preparation process

Abstract

The invention discloses a high-temperature-resisting pressure-sensitive adhesive for an adhesive tape, the adhesive tape and a preparation process. The high-temperature-resisting pressure-sensitive adhesive comprises main body rubber, an auxiliary material additive, a tackifying agent, a plasticizer, a solvent and a curing agent, wherein the main body rubber is composed of natural rubber and / or synthetic rubber, the auxiliary material additive comprises stannous chloride dihydrate and an anti-aging agent, mass mole ratios of the stannous chloride dihydrate and the anti-aging agent to the main body rubber are 0.2:100-8:100 and 0.1:100-10:100 respectively, the mass mole ratio of the tackifying agent to the main body rubber is 10:100-200:100, and the mass mole ratio of the plasticizer to the main body rubber is 5:100-40:100. The high-temperature-resisting pressure-sensitive adhesive is excellent in initial adhesive performance, high in cohesion, good in stripping performance, high in high-temperature resistance, especially applicable to preparation of masking tapes and capable of greatly facilitating the application of the masking tapes in high-temperature environments.

Description

technical field [0001] The invention belongs to the field of adhesive tape preparation, and in particular relates to a high-temperature-resistant pressure-sensitive adhesive for an adhesive tape, an adhesive tape and a preparation method, and is especially suitable for preparing masking tape. Background technique [0002] The tape is mainly composed of a substrate and a layer of adhesive coated on one or both surfaces of the substrate. By forming a bond between the adhesive molecules on the substrate and the surface molecules of the article, the tape is only adhered to on the surface of the item. According to the substrate material, the tape can be divided into kraft paper tape, sealing tape, stationery tape, masking tape, cloth tape, aluminum foil tape, etc. Among them, masking tape (also known as masking pressure-sensitive tape) is made of masking paper and pressure-sensitive adhesive as the main raw materials. The roll-shaped tape made has the characteristics of high te...

AI Technical Summary

Problems solved by technology

Especially when it is used in high-temperature baking paint masking, semiconductor component fixing, etc., if the high-temperature resistance of the masking tape cannot meet the use requirements, the masking tape will be damaged due to the cohesion and adhesion of the pressure-sensitive adhesive during use. Degumming, cracking, residual glue, etc. will occur due to the drop of force, which will pollute the surface of the protected object or cause damage to the fixed electronic semiconductor components.

However, the highest resistance of the existing conventional masking tape can only reach 120°C. When the operating environment exceeds 120°C, the existing silicone-type pressure-sensitive adhesive is used as the pressure-sensitive adhesive of the masking tape. It meets the high temperature resistance requirements of masking tape, but due to the poor initial adhesion of silicone pressure sensitive adhesives and the high cost of preparation, its use is greatly restricted

[0004] At present, there have been a small number of technical disclosures related to high-temperature resistant masking tapes, mainly including: a Chinese patent with the publication number CN102363718A discloses a high-temperature masking tape, which uses a high-temperature-resistant glue to improve the temperature-resistant performance. Including one of silicone glue, phenolic resin glue, urea-formaldehyde resin glue, heat-resistant epoxy glue and polyimide glue. Although the temperature resistance of the masking tape is improved, its initial adhesion is poor

For example, the Chinese patent with the publication number CN102226068A discloses a masking paper adhesive and its products. Although the adhesive is more environmentally friendly, it has poor peeling performance and high temperature resistance.

For example, the Chinese patent with the authorized announcement number CN202220152U discloses the production of a masking capacitive tape. This product adopts polyisoprene rubber graft polymerization monomer, and realizes the high temperature resistance of the pressure sensitive adhesive through grafting and crosslinking. performance, the patent does not specifically disclose the graft polymerization process, but judging from the technical content disclosed in the patent, the pressure-sensitive adhesive is the core functional component of the pressure-sensitive adhesive tape, and the graft polymerization method is used to prepare the pressure-sensitive adhesive. The joint density cannot meet the adhesive requirements of pressure-sensitive adhesives, the controllability is poor, and the production cost is extremely high. It is not objective and realistic to plan to promote and apply it in industrial production. It cannot meet the basic premise of the basic adhesive properties and process requirements of pressure-sensitive adhesives. Under these conditions, the high temperature resistance of pressure-sensitive adhesives is even more difficult to achieve, and there are large defects.

[0005] The closest prior art to the present invention is that the Chinese patent publication number CN1152597A discloses a high temperature resistant pressure sensitive adhesive tape, which consists of 100 parts of chlorinated butyl rubber, 1 to 6 parts of zinc oxide, and 2.5 to 20 parts of reactive alkanes. Base phenolic resin, 1-5 parts of stearic acid, 2-10 parts of zinc resinate, 10-50 parts of tackifying resin, 6-40 parts of softener are dissolved in an organic solvent, and reacted at 60-100°C for 1-6 hours, the resulting pressure-sensitive adhesive is coated on temperature-resistant crepe paper, although the pressure-sensitive adhesive has high-temperature resistance, it still has low initial adhesion and cohesion as the existing silicone-type pressure-sensitive adhesive. bad question

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