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High-viscosity chlorinated rubber and production method thereof

A technology of chlorinated rubber and its production method, which is applied in the field of high-viscosity chlorinated rubber and its production, and can solve the problems of atmospheric ozone layer destruction and small molecular weight of chlorinated rubber, etc.

Inactive Publication Date: 2011-10-19
罗圣君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the production method of high-viscosity chlorinated rubber is to use carbon tetrachloride solvent method, which has a destructive effect on the atmospheric ozone layer. With the gradual implementation of the "Montreal Protocol", my country has stopped producing and using tetrachloride in 2009. Carbon, so this production method has been eliminated, and the molecular weight of the chlorinated rubber produced is small, and the molecular formula (C 10 h 11 Cl 7 ) n Among them, n=13~55, the use has great limitations

Method used

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  • High-viscosity chlorinated rubber and production method thereof
  • High-viscosity chlorinated rubber and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0015] Add 60Kg of masticated raw rubber to a 2000-liter enamel reaction kettle with stirring, add 3000Kg of chloroform solvent, add 2.5kg of initiator, and gradually raise the temperature to 75°C under stirring. After the rubber is completely dissolved, introduce air , when the viscosity of the glue solution reaches the specified requirement (such as 200~250CP), pass into chlorine gas, the total weight of chlorine gas is 215Kg, when the chlorine content of chlorinated rubber in the glue solution reaches more than 65%, after the reaction finishes, keep warm for 2 hours , and then use clean air to drive away residual chlorine in the kettle, desolventize the material, wash with water, deacidify, neutralize, dehydrate, and dry to obtain 165Kg of this product.

Embodiment 2

[0017] Add 100Kg of masticated raw rubber to a 2000-liter enamel reaction kettle with stirring, add 3000Kg of chloroform solvent, add 2.5kg of initiator, and gradually raise the temperature to 65°C under stirring. After the rubber is completely dissolved, introduce air , when the viscosity of the glue solution reaches the specified requirement (such as 100~150CP), pass into chlorine gas, the total weight of chlorine gas is 360Kg, when the chlorine content of chlorinated rubber in the glue solution reaches more than 65%, after the reaction finishes, keep warm for 2 hours , and then use clean air to drive away the residual chlorine in the kettle, and remove the material, wash with water, deacidify, neutralize, dehydrate, and dry to obtain 280Kg of this product.

Embodiment 3

[0019] Add 180Kg of masticated raw rubber to a 2000-liter enamel reaction kettle with stirring, add 3000Kg of chloroform solvent, add 2.5kg of initiator, and gradually raise the temperature to 60°C under stirring. After the rubber is completely dissolved, introduce air , when the viscosity of the glue solution reaches the specified requirement (such as 30~50CP), pass into chlorine gas, the total weight of chlorine gas is 645Kg, when the chlorine content of chlorinated rubber in the glue solution reaches more than 65%, after the reaction finishes, keep warm for 2 hours , and then use clean air to drive away the residual chlorine in the kettle, and the material is desolvated, washed with water, deacidified, neutralized, dehydrated, and dried to obtain 510Kg of this product.

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Abstract

The invention relates to high-viscosity chlorinated rubber and a production method thereof. The molecular formula of the high-viscosity chlorinated rubber is (C10H11C17)n, wherein n is 60 to 200. The production method for the high-viscosity chlorinated rubber comprises the following processes of: plasticating rubber (natural rubber and synthetic rubber), conveying the plasticated rubber into a degradation kettle containing a solvent, and introducing air for degrading; after the degraded rubber liquid reaches the specified viscosity, conveying the rubber liquid to a chlorination process, introducing chlorine for chloridizing, and desolventizing liquid obtained after the reaction is finished, separating and drying to prepare a high-viscosity chlorinated rubber product; and conveying the separated solvent to a degradation process for recycling, wherein the solvent is trichloromethane. In the production method, the trichloromethane solvent which does not pollute an atmospheric layer is adopted, the closed-loop circulation is realized in the production process, and the viscosity ranges from 30 to 300 mpa.s, so the production method is environment-friendly, and the wider and more purposes are opened for the coating industry.

Description

technical field [0001] The invention relates to a production method of chlorinated rubber, in particular to a high-viscosity chlorinated rubber and a production method thereof. Background technique [0002] At present, the production method of high-viscosity chlorinated rubber is to use carbon tetrachloride solvent method, which has a destructive effect on the atmospheric ozone layer. With the gradual implementation of the "Montreal Protocol", my country has stopped producing and using tetrachloride in 2009. Carbon, so this production method has been eliminated, and the molecular weight of the chlorinated rubber produced is small, and the molecular formula (C 10 h 11 Cl 7 ) n Wherein n=13~55, the application has great limitation. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the present invention provides a new high-viscosity chlorinated rubber and a production method thereof. In the production process, no carbon tetrachlorid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/14
Inventor 罗圣君
Owner 罗圣君