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Vulcanized butyl pressure-sensitive adhesive

A pressure-sensitive adhesive and vulcanization-type technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve problems such as poor heat resistance, decreased force between chains, and small cohesive energy, and achieve improved Cohesive energy and heat resistance, effect of improving heat resistance

Active Publication Date: 2019-08-30
HUIZHOU NENGHUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment approach

[0026] In order to better illustrate the vulcanized butyl pressure-sensitive adhesive, to better understand the concept of the vulcanized butyl pressure-sensitive adhesive. One embodiment, a vulcanized butyl pressure-sensitive adhesive, comprising the following components in parts by mass: 30-40 parts of mineral oil, 10-20 parts of butyl adhesive, 20-40 parts of heat-resistant filler, 2 parts of vulcanizing agent ~4 parts, anti-scorch agent 0.1-0.4 parts, stabilizer 1-5 parts and tackifying resin 20-30 parts. It should be noted that butyl adhesive is the main polymer of vulcanized butyl pressure-sensitive adhesive, which mainly endows vulcanized butyl pressure-sensitive adhesive with properties such as viscoelasticity, cohesive strength and medium resistance. Mineral oil has a plasticizing effect, which can reduce the hardness and viscosity of butyl rubber, improve the processing performance and low temperature resistance of butyl rubber. Heat-resistant fillers can improve th...

Embodiment 1

[0052] S111, in a vacuum environment at a temperature of 160 ° C, 30kg polyisobutylene, 20kg butyl rubber, 10kg calcium carbonate, 5kg talcum powder, 5kg titanium dioxide, 2kg tetrakis [β-(3,5-tertiary butyl-4 -Hydroxyphenyl)propionic acid]pentaerythritol ester and 3kg2-hydroxyl-4-methoxy-5-sulfonic acid benzophenone were stirred for 40min at a stirring rate of 50rpm / min, so that each component was completely melted to obtain heat-resistant Butyl gum solution;

[0053] S121, then add 5 kg of petroleum resin, 15 kg of phenolic resin and 0.4 kg of N-nitrosoaniline to the heat-resistant butyl rubber solution in a vacuum environment at a temperature of 155° C., and stir for 40 min at a stirring rate of 40 rpm / min, To make each component melt completely to obtain a heat-resistant butyl pressure-sensitive adhesive solution;

[0054] S131, then add 2kg of alkylphenol-formaldehyde resin to the heat-resistant butyl pressure-sensitive adhesive solution in a vacuum environment at a temp...

Embodiment 2

[0056] S112, in a vacuum environment at a temperature of 170°C, 40kg of polyisobutylene, 10kg of butyl rubber, 25kg of calcium carbonate, 5kg of talc, 10kg of titanium dioxide, and 0.5kg of tetra[β-(3,5-tertiary butyl- 4-hydroxyphenyl) propionic acid] pentaerythritol ester and 0.5kg2-hydroxyl-4-methoxy-5-sulfonic acid benzophenone were stirred for 20min at a stirring rate of 70rpm / min, so that each component was completely melted to obtain Heat-resistant butyl rubber solution;

[0057] S122, then add 5 kg of petroleum resin, 25 kg of phenolic resin and 0.1 kg of N-nitrosoaniline to the heat-resistant butyl rubber solution in a vacuum environment at a temperature of 150° C., and stir at a stirring rate of 60 rpm / min for 20 min, To make each component melt completely to obtain a heat-resistant butyl pressure-sensitive adhesive solution;

[0058] S132, then, in a vacuum environment at a temperature of 150°C, add 4kg of alkylphenol-formaldehyde resin to the heat-resistant butyl p...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/20C09J123/22C09J191/00C09J123/28C09J11/04C09J11/06
CPCC08K2003/2241C08K2003/265C08L2201/08C08L2205/025C09J11/04C09J11/06C09J123/22C09J191/00C09J2301/302C08L23/22C08K13/02C08K3/26C08K3/34C08K3/22C08K5/1345C08K5/42C08L23/283C08K3/346C08K5/18
Inventor 林旭生江强吴兆辉汤仪标
Owner HUIZHOU NENGHUI CHEM CO LTD
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