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Preparation method of high temperature resistant pressure sensitive adhesive (PSA) tape for capacitor

A pressure-sensitive adhesive tape, high-temperature-resistant technology, applied in adhesives, film/sheet adhesives, grafted polymer adhesives, etc., can solve the problem of difficult to achieve the heat resistance of pressure-sensitive adhesive tape Comprehensive balance of cohesiveness, limiting chemical cross-linking methods and other issues, to achieve the effect of reduced production cost, firm bonding, and no shedding

Inactive Publication Date: 2012-11-14
昆山旭虹精密零组件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the requirements for the initial tack of the pressure-sensitive adhesive tape, the further application of the chemical cross-linking method is limited, and it is difficult to achieve a comprehensive balance between the heat resistance of the pressure-sensitive adhesive tape and the initial tack and cohesiveness of the pressure-sensitive adhesive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] In reactor, add 500L reaction solvent, 60kg styrene-butadiene-styrene triblock copolymer and 40kg natural rubber, stir and heat up to 73 ℃ to make styrene-butadiene-styrene triblock copolymer and The natural rubber is completely dissolved, under the protection of nitrogen, add 27kg active monomer and 0.8kg diacyl organic peroxide initiator in batches, add 60kg terpene resin and 7kg curing agent after reacting for 60 minutes, react for another 65 minutes, and cool to obtain Pressure-sensitive adhesive, the pressure-sensitive adhesive is coated on the base material, and the release agent is coated on the back of the base material, and dried to obtain a high-temperature resistant pressure-sensitive adhesive tape.

Embodiment 2

[0015] Add 500L reaction solvent, 80kg styrene-butadiene-styrene triblock copolymer and 20kg natural rubber in the reactor, stir and heat up to 75°C to make styrene-butadiene-styrene triblock copolymer and The natural rubber is completely dissolved, under the protection of nitrogen, add 31kg active monomer and 0.4kg diacyl organic peroxide initiator in batches, add 60kg terpene resin and 12kg curing agent after reacting for 75 minutes, react for another 60 minutes, and cool to obtain Pressure-sensitive adhesive, the pressure-sensitive adhesive is coated on the base material, and the release agent is coated on the back of the base material, and dried to obtain a high-temperature resistant pressure-sensitive adhesive tape.

Embodiment 3

[0017] Add 500L reaction solvent, 90kg styrene-butadiene-styrene triblock copolymer and 10kg natural rubber in the reactor, stir and heat up to 77°C to make styrene-butadiene-styrene triblock copolymer and The natural rubber is completely dissolved, and under the protection of nitrogen, 37kg of active monomer and 0.09kg of diacyl organic peroxide initiator are added in batches, after 89 minutes of reaction, 60kg of terpene resin and 12kg of curing agent are added, and the reaction is continued for 60 minutes, and cooled to obtain Pressure-sensitive adhesive, the pressure-sensitive adhesive is coated on the base material, and the release agent is coated on the back of the base material, and dried to obtain a high-temperature resistant pressure-sensitive adhesive tape.

[0018] The invention discloses a method for preparing a high-temperature-resistant pressure-sensitive adhesive tape used for capacitors, which reduces production costs, and the melting temperature of the pressure...

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PUM

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Abstract

The invention discloses a preparation method of a high temperature resistant PSA tape for a capacitor. The method includes mixing a styrene-butadiene-styrene triblock copolymer with a reaction solvent with stirring, heating up for dissolution, adding active monomers and initiators in batches under the protection of nitrogen, reacting for a moment and adding tackifying resin and curing agents, reacting for a moment and cooling to obtain the PSA, coating the PSA on a base material, coating a separant on the back side of the base material, and drying to obtain the PSA tape. According to the preparation method, the production cost is reduced, the melting temperature of the PSA is improved to above 170 DEG C from below 100 DEG C when the PSA is unmodified, the obtained high temperature resistant PSA tape has firm adhesion without falling off or displacement, leads have no adhesive residue, the problem that a core is bonded and difficult to pull during a board removal is solved, and production technology requirements for capacitors are satisfied.

Description

technical field [0001] The invention relates to the field of electronic adhesive tapes, in particular to a preparation method of a high-temperature-resistant pressure-sensitive adhesive tape used for capacitors. Background technique [0002] High temperature resistant pressure sensitive tape, also known as heat curing special pressure sensitive tape, is an important auxiliary material for the introduction of capacitor production lines in the electronics industry. Ordinary pressure-sensitive tapes traditionally used are not resistant to high temperatures and are generally used below 80°C. [0003] The chemical cross-linking method is currently a major technology to improve the performance of pressure-sensitive tapes. Through cross-linking, the minute structure can be changed to improve the adhesive properties such as stickiness, heat resistance, and solvent resistance. Chemical cross-linking methods are generally divided into cross-linked rubber pressure-sensitive adhesives ...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J151/00C08F291/00
Inventor 李飞
Owner 昆山旭虹精密零组件有限公司
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