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Method for in-situ reinforcement of emulsion polymerization styrene-butadiene rubber by using ionic liquid modified carbon nano-tubes

A technology of emulsion polystyrene butadiene rubber and carbon nanotubes, which is applied in the production of bulk chemicals, etc., can solve the problems of solvent pollution, easy deformation of gel, etc., and achieve easy operation, simple modification method, wear resistance and anti-aging The effect of excellent performance

Active Publication Date: 2020-01-31
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention aims to solve the technical problem that the composite gel obtained by the existing method is polluted by the solvent, and the gel is easily deformed during the solvent exchange process.

Method used

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  • Method for in-situ reinforcement of emulsion polymerization styrene-butadiene rubber by using ionic liquid modified carbon nano-tubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of ionic liquid modified carbon nanotube viscoelastic fluid: Add 12000 parts of 1-butyl-3-methylimidazole hexafluorophosphate in a mortar, add 100 parts of carbon nanotubes, and stir for 1.5h at room temperature , Obtain 1-butyl-3-methylimidazole hexafluorophosphate modified carbon nanotube viscoelastic fluid.

[0041] (2) In-situ polymerization: sequentially add 100 parts of water, 30 parts of styrene, 5 parts of disproportionated potassium rosinate soap, and 0.6 parts of t-dodecyl mercaptan into the polymerization kettle. After replacing with nitrogen, add 70 parts of butadiene , 10 parts of viscoelastic fluid (obtained in step (1)), stir and heat, add 0.4 parts of sodium azoamino acid when the temperature of the polymerization kettle reaches 40℃, stir for 0.8h, and then react for 5 hours at the polymerization temperature of 40℃, Add 0.2 parts of sodium dimethyl dithiocarbamate to prepare enhanced styrene butadiene latex.

[0042] (3) Latex coagulation: ad...

Embodiment 2

[0048] (1) Preparation of ionic liquid modified carbon nanotube viscoelastic fluid: Add 15000 parts of 1-octyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt) in a mortar, and add 100 parts of carbon The nanotubes were stirred at room temperature for 1.5 hours to obtain 1-octyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide) modified carbon nanotube viscoelastic fluid.

[0049] (2) In-situ polymerization: sequentially add 100 parts of water, 50 parts of styrene, 10 parts of disproportionated potassium rosinate soap, 0.5 parts of tertiary carbon mercaptan in the polymerization kettle, and then add 50 parts of butadiene, 5 parts of viscoelastic fluid (obtained in step (1)), stir and heat, add 0.2 part of sodium azoamino acid when the temperature of the polymerizer reaches 30℃, stir for 1h, then react for 5 hours at the polymerization temperature of 60℃, add 0.3 Parts of hydroquinone to prepare enhanced styrene butadiene latex.

[0050] (3) Latex agglomeration: add 6...

Embodiment 3

[0055] (1) Preparation of ionic liquid modified carbon nanotube viscoelastic fluid: add 13000 parts of 1-hexyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt in a mortar, and add 100 parts of carbon nanotubes , Stirring for 1.0 h at room temperature to obtain 1-hexyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide salt modified carbon nanotube viscoelastic fluid.

[0056] (2) In-situ polymerization: sequentially add 100 parts of water, 40 parts of styrene, 8 parts of disproportionated potassium rosinate soap, 0.8 parts of tertiary fourteen carbon mercaptan to the polymerization kettle, and then add 60 parts of butadiene , 15 parts of viscoelastic fluid (obtained in step (1)), stir and heat, add 0.3 part of sodium azoamino acid when the temperature of the polymerization kettle reaches 40℃, stir for 1h, then react at the polymerization temperature of 50℃ for 6 hours, add 0.5 parts of sodium dimethyl dithiocarbamate to prepare enhanced styrene butadiene latex.

[0057...

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Abstract

The invention provides a method for in-situ reinforcement of an emulsion polymerization styrene-butadiene rubber by using ionic liquid modified carbon nano-tubes. The method comprises: (1) preparationof an ionic liquid modified carbon nano-tube viscoelastic fluid: adding an ionic liquid and carbon nano-tubes into a mortar, and stirring at a room temperature to obtain the ionic liquid modified carbon nano-tube viscoelastic fluid; (2) in-situ polymerization: sequentially adding water, styrene, an emulsifier and a molecular weight regulator into a polymerization kettle, carrying out nitrogen displacement, adding butadiene and the viscoelastic fluid obtained in the step (1), stirring, heating, adding an initiator when the temperature of the polymerization kettle reaches 30-60 DEG C, stirringfor 0.8-1 h, reacting for 5-8 h at a polymerization temperature of 30-60 DEG C, and adding a terminating agent to obtain the enhanced styrene-butadiene latex; and (3) latex coagulation: adding soft water and the styrene-butadiene latex obtained in the step (2) into a coagulation kettle, stirring and mixing, adding an anti-aging agent and a demulsifier, stirring and mixing, adding a coagulant, carrying out coagulation, washing, dehydrating, and drying to obtain the polymer.

Description

Technical field [0001] The invention relates to a method for in-situ reinforced emulsion polystyrene-butadiene rubber with modified carbon nanotubes, in particular to a method for in-situ reinforced emulsion polystyrene-butadiene rubber with ionic liquid modified carbon nanotubes, in particular to an emulsion method Method for preparing in-situ reinforced emulsion polystyrene butadiene rubber. Background technique [0002] Carbon black is widely used as a reinforcing filler in the rubber industry. Carbon black is neither a typical crystalline body nor a typical amorphous body. Its microstructure is between the stone crystal structure and the amorphous body structure. At present, the modification of carbon black is almost all around a small amount of functional groups on the surface of carbon black. The most widely studied of these modification methods is based on the surface grafting reaction of various groups, including various reactions such as free radicals, anions and catio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F212/08C08K9/04C08K3/04C08J5/00
CPCC08F236/10C08K9/04C08K3/041C08J5/005C08K2201/011C08J2309/06C08F212/08Y02P20/54
Inventor 魏绪玲张华强杨芳李晶赵玉中艾纯金马朋高龚光碧
Owner PETROCHINA CO LTD