Vulcanized butyl pressure-sensitive adhesive

Abstract

The invention relates to the field of butyl rubber pressure-sensitive adhesive, and discloses vulcanized butyl pressure-sensitive adhesive. The vulcanized butyl pressure-sensitive adhesive is preparedfrom the following components in parts by mass: 30-40 parts of mineral oil, 10-20 parts of butyl glue, 20-40 parts of heat-resistant filler, 2-4 parts of a vulcanizing agent, 0.1-0.4 part of a scorchretarder, 1-5 parts of a stabilizer and 20-30 parts of tackifying resin, wherein the heat-resistant filler can improve the heat resistance of the vulcanized butyl pressure-sensitive adhesive to a large extent; the vulcanizing agent is used for improving the cohesive energy and the ability of wrapping the heat-resistant filler of butyl rubber, so that the butyl rubber can accommodate more heat-resistant filler, thereby improving the cohesive energy and heat resistance of the vulcanized butyl pressure-sensitive adhesive, and overcoming the shortcomings existing in common butyl rubber pressure-sensitive adhesive that the cohesive energy is low, cold flow phenomenon is serious and the heat resistance is poor.

Description

technical field [0001] The invention relates to the field of butyl pressure-sensitive adhesives, in particular to a vulcanized butyl pressure-sensitive adhesive. Background technique [0002] my country's pressure-sensitive adhesive industry has a history of more than 30 years, but for a long time it has mainly stayed in the production of medical plasters and black tape for insulation. The research, development, preparation and application of pressure-sensitive adhesives have become increasingly active in the past decade. Since pressure-sensitive adhesives have the advantages of low price, convenient use, and no pollution to the surface of the adherend, and the products have multiple functions such as bonding, decoration, reinforcement, protection, and fixation, many new and efficient pressure-sensitive adhesive preparation methods and Its products have been widely used in many fields such as printing, packaging, medical care and daily life. Rubber-type pressure-sensitive a...

AI Technical Summary

Problems solved by technology

However, because the molecular structure of butyl rubber is a highly saturated long-chain linear molecular structure, which is an amorphous polymer, the force between the internal molecular chains is weak, the cohesion is poor, and there are no rigid segments (such as benzene rings) on the molecular chains. ), the glass transition temperature is -105°C, it is prone to deformation, slippage occurs between different chain segments, cold flow is prone to occur in normal temperature environment, the temperature rises, the molecular motion accelerates, and the force between the chains decreases rapidly

Traditional butyl pressure-sensitive adhesives have disadvantages such as small cohesive energy, serious cold flow phenomenon, and poor heat resistance, which are greatly restricted in application.

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