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Epoxy butyl rubber, preparation method and applications thereof

A technology of epoxy butyl and butyl rubber, which is applied in the chemical industry, can solve the problems of difficulty in epoxidation and low unsaturation of butyl rubber, and achieve controllable epoxidation degree, good compatibility and air tightness Effect

Inactive Publication Date: 2019-08-06
ZHEJIANG CENWAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the low degree of unsaturation of butyl rubber, epoxidation is difficult, and there is no production of epoxidized butyl rubber at present.

Method used

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  • Epoxy butyl rubber, preparation method and applications thereof
  • Epoxy butyl rubber, preparation method and applications thereof
  • Epoxy butyl rubber, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 10 g of butyl rubber (weight average molecular weight: 550,000, degree of unsaturation: 1.89%), cut into pieces and place in a four-neck flask, add 100 ml of n-hexane to dissolve. After the colloidal particles are completely dissolved, the four-necked flask is at room temperature (23~25 ℃), and slowly adding 31.5ml mass concentration is 2% epoxidation reagent m-chloroperoxybenzoic acid-toluene solution (the The mol ratio of double bond and m-chloroperoxybenzoic acid is 1:1.3), start to react, after reacting for 2h, neutralize with the sodium hydroxide solution of 1% with mass concentration, adjust the pH value of glue to 7~10, Wash the glue solution with 200ml distilled water for 3 to 4 times, and solidify the glue solution into a glue block. The prepared epoxybutyl rubber was detected by nuclear magnetic resonance method, the degree of double bond epoxidation was 82.0%, and the degree of ring opening was 6.69%.

Embodiment 2

[0036] Weigh 10 g of butyl rubber (weight-average molecular weight: 400,000, degree of unsaturation: 1.89%), cut it into pieces and place it in a four-necked flask, and add 100 ml of n-hexane to dissolve it. After the colloidal particles were completely dissolved, the four-necked flask was placed in a constant temperature water bath with an initial reaction temperature of 4°C, and slowly adding 21.5ml of mass concentration was 2% epoxidation reagent m-chloroperoxybenzoic acid-toluene solution (butyl The mol ratio of the double bond in the rubber to m-chloroperoxybenzoic acid is 1:0.8), close the thermostat, and after continuing to react for 2h, neutralize with a mass concentration of 1% sodium hydroxide solution, and adjust the pH value of the glue to 7-10, wash the glue solution with 200ml distilled water for 3-4 times, and solidify the glue solution into a glue block. Detected by nuclear magnetic resonance method, the degree of double bond epoxidation of the prepared epoxidi...

Embodiment 3

[0038] Weigh 10 g of butyl rubber (weight-average molecular weight: 650,000, degree of unsaturation: 1.70%), cut it into pieces and place it in a four-necked flask, and add 100 ml of n-hexane to dissolve it. After the colloidal particles are completely dissolved, place the four-neck flask in a constant temperature water bath at 40°C, add 0.4ml polyethylenediene monolaurate to keep it stable for 2h, slowly add 0.09ml of formic acid with a mass concentration of 88%, and 0.57ml with a mass concentration of 88% formic acid. 30% hydrogen peroxide starts to react (formic acid:hydrogen peroxide molar ratio 0.8:1), after 1.5 hours of reaction, neutralize with 1% sodium hydroxide solution, adjust the pH value of the glue to 7-10 , Wash the glue solution with 150ml distilled water for 3 to 4 times, and solidify the glue solution into a glue block. Detected by nuclear magnetic resonance, the double bond epoxidation degree of the prepared epoxybutyl rubber is 7.4%, and the ring opening de...

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Abstract

The invention belongs to the field of chemical industry, and provides an epoxy butyl rubber preparation method, which comprises: carrying out a reaction on a butyl rubber raw material and an epoxidizing reagent in a dispersion system at a certain temperature, neutralizing the obtained product with an alkali solution, carrying out water washing, and purifying. According to the present invention, with the method, the epoxidation of the butyl rubber is achieved, the epoxidation degree can be controlled, the problem that the butyl rubber cannot be epoxidized in the prior art is solved, and the epoxy butyl rubber prepared by the method has good compatibility and good airtightness.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to epoxy butyl rubber and its preparation. Background technique [0002] Butyl rubber is a polymer copolymer formed by cationic polymerization of isobutylene and a small amount of isoprene at low temperature. A small amount of isoprene is introduced to obtain double bonds available for vulcanization. The unique polyisobutylene structure in the butyl rubber molecule gives it good air tightness and aging resistance. Its air permeability is only 1 / 7 of natural rubber, 1 / 5 of styrene-butadiene rubber, and water vapor The transmittance is 1 / 200 of natural rubber and 1 / 140 of styrene-butadiene rubber. For this reason, butyl rubber is primarily used in the manufacture of innerliners for tube and tubeless tires. In addition, butyl rubber is also used to make steam hoses, chemical equipment linings, cable insulation layers, waterproof membranes, etc. While butyl rubber's high degree of satu...

Claims

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Application Information

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IPC IPC(8): C08F8/08C08F210/12
CPCC08F8/08C08F210/12
Inventor 翟路路任纪文张晓玲邱正茂张永成
Owner ZHEJIANG CENWAY MATERIALS CO LTD
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