Vulcanizing system of brominated butyl rubber/ polypropylene thermoplastic elastomer sealing material and preparation method for sealing material

A technology of brominated butyl rubber and thermoplastic elastomer, which is applied in the field of vulcanization system and its preparation, can solve the problems of low double bond content in the main chain of brominated butyl rubber, loss of thermoplasticity of leftover materials, slow vulcanization speed of models, etc., and achieve easy The effects of weighing and calculation, high tensile strength, and easy control of production conditions

Inactive Publication Date: 2012-07-18
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation process of bromobutyl rubber pharmaceutical sealing materials is cumbersome, and it needs to go through processes such as mixing of rubber and additives, mold vulcanization, and post-treatment, and the double bond content of the main chain of bromobutyl rubber is very low, resulting in Its model vulcanization speed is slow and the production efficiency is low
At the same time, the leftovers produced in the production process lose their thermoplasticity due to vulcanization and cross-linking, which leads to waste of materials because they cannot be reused

Method used

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  • Vulcanizing system of brominated butyl rubber/ polypropylene thermoplastic elastomer sealing material and preparation method for sealing material
  • Vulcanizing system of brominated butyl rubber/ polypropylene thermoplastic elastomer sealing material and preparation method for sealing material
  • Vulcanizing system of brominated butyl rubber/ polypropylene thermoplastic elastomer sealing material and preparation method for sealing material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0030]

[0031] Process as follows:

[0032] (1) Under the open mill at room temperature, add IIR, heat-reactive alkylphenolic resin, and zinc oxide in sequence to obtain a vulcanization system; at a temperature of 40°C, add bromobutyl rubber, calcined clay, and paraffin in sequence Oil and processing aids were blended for 10 minutes in a double-roller kneading machine to obtain a rubber compound.

[0033] (2) Under the condition that the rotor speed of the internal mixer is 70rpm and the blending temperature is 180°C, add polypropylene and additives, plasticize for 2 minutes, then add the prepared mixed rubber, blend for 4 minutes, and then add the vulcanization system, The bromobutyl rubber / polypropylene thermoplastic elastomer was prepared by dynamic vulcanization and blending for 6 minutes. In the open mill, the flakes are made into sheets.

[0034] The the...

Embodiment 2

[0038] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0039]

[0040] Above each formula is processed according to the following process method:

[0041] (1) Under the open mill at room temperature, add IIR, heat-reactive alkylphenolic resin, and zinc oxide in sequence to make a vulcanization system; at a temperature of 40°C, add bromobutyl rubber and reinforcing filler in sequence , Processing aids were blended for 10 minutes in a double-roller kneading machine to obtain a mixed rubber.

[0042] (2) Under the condition that the rotor speed of the internal mixer is 70rpm and the blending temperature is 180°C, add polypropylene and additives, plasticize for 2 minutes, then add the prepared mixed rubber, blend for 4 minutes, and then add the vulcanization system, The bromobutyl rubber / polypropylene hydrocarbon thermoplastic elastomer was prepared by dynamic vulcanization and blending for 6 minutes. In the open mill, ...

Embodiment 3

[0047] The material provided by the invention is formulated by weight ratio from the following raw materials:

[0048]

[0049] Process as follows:

[0050] (1) Under the open mill at room temperature, add IIR, heat-reactive alkylphenolic resin, and zinc oxide in sequence to make a vulcanization system; at a temperature of 40°C, add bromobutyl rubber and reinforcing filler in sequence , Processing aids were blended for 10 minutes in a double-roller kneading machine to obtain a mixed rubber.

[0051] (2) Under the condition that the rotor speed of the internal mixer is 70rpm and the blending temperature is 180°C, add polypropylene and additives, plasticize for 2 minutes, then add the prepared mixed rubber, blend for 4 minutes, and then add the vulcanization system, The bromobutyl rubber / polypropylene hydrocarbon thermoplastic elastomer was prepared by dynamic vulcanization and blending for 6 minutes. In the open mill, the flakes are made into sheets.

[0052] The thermopl...

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Abstract

The invention provides a vulcanizing system of a brominated butyl rubber / polypropylene thermoplastic elastomer sealing material and a preparation method for the sealing material. The vulcanizing system comprises a vulcanizing agent, a catalyst and an active agent. The vulcanizing agent is a sulfur-free vulcanizing system, is granular and dustless, and is easy to weigh, calculate and disperse and safe in operation. The preparation method is a dynamic vulcanizing blending method, and can comprise injection and extrusion molding; the cross-linked rubber phase is dispersed uniformly in a plastic phase; and the preparation method has the advantages of simple process, a small amount of waste, high production efficiency and the like. The performance of the prepared sealing material meets the requirement of national standard YBB00232004. The vulcanizing system can substitute brominated butyl vulcanized rubber and can be applied in various fields.

Description

technical field [0001] The invention relates to a thermoplastic elastomer, in particular to a vulcanization system of a brominated butyl rubber / polypropylene thermoplastic elastomer sealing material and a preparation method thereof. Background technique [0002] With the rapid development of the pharmaceutical industry, the quality requirements for pharmaceutical sealing materials are also gradually increasing. The pharmaceutical sealing materials made of natural rubber and butyl rubber are not only prone to particle pollution, but also have compatibility problems with packaged drugs. , so it has been gradually eliminated. At present, many manufacturers of pharmaceutical sealing materials in my country are working on the research and development of bromobutyl rubber sealing materials. Because brominated butyl rubber (IIR) is an elastomer obtained by butyl rubber through bromination substitution reaction, it has a basically saturated main chain, so it has many characteristic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/02C08L23/14C08L61/06C09K3/10C08K3/22C08K3/34B29B7/28B29B9/06B29C47/92B29C48/92
CPCB29B7/183B29B7/46B29B7/72B29B7/7461B29B7/90B29B9/04B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40
Inventor 唐颂超彭俊彪李静王庆海徐建荣潘泳康王婷兰
Owner EAST CHINA UNIV OF SCI & TECH
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