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Preparation method of non-vulcanized butyl rubber

A technology of vulcanizing butyl and butyl rubber, which is applied in the field of polymer materials, can solve the problems of material structural performance degradation and poor mechanical properties, and achieve the effect of improving mechanical properties

Inactive Publication Date: 2020-05-12
常州聚焦橡塑新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing butyl rubber materials prepared by extruding through an extruder have a significant decline in the structural properties of the material due to the extrusion molding operation, and the mechanical properties are not good.

Method used

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  • Preparation method of non-vulcanized butyl rubber

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The method for preparing non-vulcanized butyl rubber according to an embodiment of the present invention includes the following steps: S1. Dry and dehydrate the butyl rubber. After the dehydration is completed, the dried rubber is crushed, ground and sieved, and the sieved rubber particles are collected and juxtaposed. In the microwave device, activate the treatment, after the activation is completed, collect the activated modified particles; S2, add the flame retardant to the activated modified particles and mix and stir, collect the mixed particles and put them in the calender, and wait for the calendering treatment Obtain the pre-mixed rubber base; S3, place the mixed rubber base in the extruder, heat-preserve and melt the pre-treatment, obtain the pre-treated molten rubber, and then mix the toning filler, stearic acid, tackifying resin, metal oxide, polymer Isobutylene, paraffin oil and microcrystalline wax are continuously fed into the extruder according to the form...

Embodiment 1

[0034]Take butyl rubber in an oven at 55°C, dry and dehydrate for 10 hours. After the dehydration is completed, crush and grind the dried rubber and sieve it. Collect 500-mesh sieved rubber particles and place them in a microwave device. Activation treatment at 800W for 45s, after the activation is completed, collect the activated modified particles; add the flame retardant to the activated modified particles at a mass ratio of 1:5 and mix and stir, collect the mixed particles and place them in a calender , control roller line speed 10m / min, maximum roller spacing 10mm, calender processing and control calender speed to be 35mm / min, after calender processing is finished, get premixed rubber base; Mixed rubber base, 0 parts of tinting filler, 0 parts of stearic acid, 0 parts of tackifying resin, 0 parts of metal oxide, 10 parts of polyisobutylene, 0 parts of paraffin oil, 0 parts of microcrystalline wax, put the mixed rubber base in In the extruder, control the temperature of th...

Embodiment 2

[0036] Put butyl rubber in an oven at 57°C, dry and dehydrate for 12 hours. After the dehydration is completed, crush and grind the dried rubber and sieve it. Collect 500-mesh sieved rubber particles and put them in a microwave device. Activation treatment at 800W for 47s, after the activation is completed, collect the activated modified particles; add the flame retardant to the activated modified particles at a mass ratio of 1:5 and mix and stir, collect the mixed particles and place them in a calender , control the linear velocity of the rollers to 12m / min, and the maximum roller spacing is 7mm. The calendering treatment and the control of the calendering speed are 37mm / min. Mixed rubber base, 5 parts of tinting filler, 2 parts of stearic acid, 10 parts of tackifying resin, 3 parts of metal oxide, 20 parts of polyisobutylene, 5 parts of paraffin oil, 5 parts of microcrystalline wax, put the mixed rubber base in In the extruder, control the temperature of the head of the extr...

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Abstract

The invention discloses a preparation method of a non-vulcanized butyl rubber. The method comprises: drying, crushing, grinding and sieving a butyl rubber, activating, adding a flame retardant into the activated modified particles, mixing and stirring, collecting mixed particles, putting the mixed particles into a calender, carrying out calendering treatment to obtain a premixed rubber matrix, putting the mixed rubber matrix into an extruder, carrying out heat preservation melting pretreatment, sequentially and uninterruptedly adding materials such as a toning filler, stearic acid and the likeinto the extruder according to a formula, and carrying out extruding molding collecting after feeding is completed to obtain the non-vulcanized butyl rubber material. According to the invention, based on the presence of the cross-linking bond in the rubber powder at the activated part of a matrix, the light components of an added material are partially absorbed in a high-temperature stirring process, so that the mechanical property of the material is improved; and according to the technical scheme, through pre-calendering treatment, effective mixing is performed at the initial stage of material preparation, so that the prepared composite butyl rubber material has excellent structural property and excellent mechanical strength.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a preparation method of non-vulcanized butyl rubber. Background technique [0002] Butyl rubber is an elastomer formed by polymerization of isobutylene and a small amount of isoprene. It has excellent air tightness, thermal stability, ozone resistance, aging resistance and corrosion resistance. It is widely used in medical bottle stoppers and inner tubes, etc. in rubber products. However, the existing butyl rubber material prepared by extruding through an extruder has a substantial decrease in the structural properties of the material due to the extrusion molding operation, and the mechanical properties are not good. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. [0004] For this reason, the present invention proposes a preparation method of non-vulcanized butyl rubber. The specific pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/22C08L23/20C08L91/06C08J3/28C08J3/24
CPCC08J3/28C08J3/24C08J2323/22C08J2423/20C08J2491/06
Inventor 王旭
Owner 常州聚焦橡塑新材料有限公司