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Preparing method of brominated butyl rubber

A technology for bromobutyl rubber and latex, which is applied in the field of preparation of bromobutyl rubber latex, can solve the problems of high processing difficulty, expensive processing equipment and high production cost, achieves simple and convenient preparation technology and process, increased stability, The effect of broadening the application field

Inactive Publication Date: 2016-12-14
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of brominated butyl rubber latex, aiming to solve the problems of difficult processing, expensive processing equipment and high production cost in the existing production of brominated butyl rubber

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  • Preparing method of brominated butyl rubber

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preparation example Construction

[0026] Such as figure 1 As shown, the preparation method of bromobutyl rubber latex of the embodiment of the present invention includes the following steps:

[0027] S101: Dissolve bromobutyl rubber in an organic solvent at 50-60°C for 2-6 hours, prepare a glue solution with a concentration of 8%-15%, combine anionic emulsifier, nonionic emulsifier and The stabilizer is added to deionized water to prepare the emulsifier aqueous solution, in which the concentration of anionic emulsifier is 1.0%~5.0%, the concentration of nonionic emulsifier is 0.2~2.0%, the concentration of stabilizer is 0.05%~1.0%, and then hydrogen is used. Potassium oxide or potassium dihydrogen phosphate adjust the pH value of the emulsifier aqueous solution to 10.0~12.0;

[0028] S102: The glue is added to the emulsifier aqueous solution at an oil-water ratio of 0.5 to 1.5, and then pumped into the emulsification tank, using a shearing machine at a cutting linear speed of 1m / s to 5m / s for a shearing time of 10...

Embodiment 1

[0040] Take 1000 parts of the bromobutyl rubber solution concentration of 10% glue and add it to 1000 parts of the emulsifier aqueous solution composed of sodium octadecylbenzene sulfonate, rosin soap and peace plus O-20, polyoxyethylene ether, The concentration of anionic emulsifier is 1.6%, the concentration of nonionic emulsifier is 0.6%, the concentration of stabilizer composed of potassium dihydrogen phosphate and sodium sulfate is 0.06%, and the pH value of the emulsifier aqueous solution is adjusted to 11 with potassium hydroxide. Use a pump to pump the emulsifier and glue into the emulsification tank, first use shear emulsification for 10 minutes at a linear speed of 3 m / s, and then emulsify for 60 minutes at a linear speed of 15 m / s to obtain an O / W emulsion. Pump into the evaporation kettle for distillation to remove the organic solvent, wherein the emulsion temperature is 70°C, the distillation time is 3h, the vacuum degree is 50kPa, and a dilute latex with a residual...

Embodiment 2

[0044] Take 1000 parts of the bromobutyl rubber solution with a concentration of 9% and add it to 900 parts of the emulsifier aqueous solution composed of sodium oleate, potassium oleate, sodium laurate, Tween85, and polyoxyethylene ether. The anionic emulsifier The concentration is 2.6%, the concentration of non-ionic emulsifier is 1%, the concentration of stabilizer composed of potassium dihydrogen phosphate and sodium sulfate is 0.06%, and the pH value of the emulsifier aqueous solution is adjusted to 11 with potassium hydroxide. Use a pump to pump the emulsifier and glue into the emulsification tank, first use shear emulsification for 20 minutes at a linear speed of 2 m / s, and then emulsify for 60 minutes at a linear speed of 16 m / s to obtain an O / W emulsion. Pump into the evaporator for distillation to remove the organic solvent, where the emulsion temperature is 70°C, the distillation time is 3h, and the vacuum is 50kPa, to obtain a dilute latex with a residual organic sol...

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Abstract

The invention discloses a preparing method of brominated butyl rubber. The preparing method includes the steps that brominated butyl rubber is dissolved in organic solvent at the temperature of 50-60 DEG C to prepare rubber liquid with certain concentration, and anionic emulsifier, non-ionic emulsifier and stabilizer are added into deionized water to prepare an emulsifier water solution; potassium hydroxide or monopotassium phosphate is used for adjusting pH value of the emulsifier water solution; the rubber liquid is added into the emulsifier water solution, the mixture is pumped into an emulsification tank and shorn through a shearing machine, high shearing action is carried at certain shearing speed to prepare O / W type brominated butyl rubber emulsion; the brominated butyl rubber emulsion is pumped into an evaporation kettle, distillation is carried out to recover organic solvent, and after distillation is finished, diluted latex with the solid content of 8-15% is obtained; the diluted latex is evaporated and concentrated through the evaporation kettle, and finally latex with certain solid content is obtained. The preparation technology and process are simple and can be used for large-scale production, and the prepared latex can broaden the application field of brominated butyl rubber.

Description

Technical field [0001] The invention belongs to the technical field of synthetic latex preparation, and in particular relates to a preparation method of bromobutyl rubber latex. Background technique [0002] Bromobutyl rubber is a brominated modified product of butyl rubber. It has a high-saturated polyisobutylene backbone of butyl rubber, so it has all the inherent properties of butyl rubber, such as shock absorption, low glass transition temperature, gas and Low moisture permeability, heat resistance, ozone resistance, ultraviolet radiation resistance and corrosion resistance, etc.; at the same time, the C-Br bond energy is less than the CC bond energy, so bromobutyl rubber has a wide vulcanization condition and a faster vulcanization speed And higher vulcanization flexibility, so it has better co-vulcanization performance with the combined rubber. However, the current research on the processing of bromobutyl rubber is mainly the processing technology of dry rubber. The proces...

Claims

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Application Information

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IPC IPC(8): C08J3/07C08L23/28A41D19/00C08J9/00A61L31/04A63H27/10
CPCA41D19/0055C08J3/07C08J2323/28C08L23/283
Inventor 周元林李迎军李银涛
Owner SOUTHWEAT UNIV OF SCI & TECH
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