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A kind of preparation method of modified powder butadiene-acrylonitrile-isoprene polymer

A technology of powdered butadiene and isoprene, applied in the direction of dyeing organosilicon compound treatment, fibrous filler, etc., can solve the problems of limited improvement of rubber properties, dust floating pollution, etc., to achieve tensile strength and constant elongation stress improved effect

Active Publication Date: 2016-06-08
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above studies are only the filling of attapulgite in rubber processing or simple mechanical blending with rubber. Because the compatibility of attapulgite and rubber and the degree of dispersion in rubber determine the degree of improvement of rubber properties, so These studies have limited improvement on the various properties of rubber, and adding them in the process of processing is easy to cause pollution problems due to dust floating

Method used

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  • A kind of preparation method of modified powder butadiene-acrylonitrile-isoprene polymer

Examples

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Effect test

Embodiment 1

[0047] ①Preparation of enhanced copolymer latex: Add 100 parts of water, 20 parts of acrylonitrile, 2 parts of sodium dodecylbenzenesulfonate, and 20 parts of isoprene into the polymerization kettle, and test the pressure with nitrogen gas to confirm that there is no leakage in the polymerization kettle Finally, replace with nitrogen several times, then add 80 parts of butadiene, add 0.3 parts of attapulgite, spray 0.5 parts of methyltrimethoxysilane tetrapropoxysilane, start the polymerization tank to stir, and then pass Put in cold water to lower the temperature, and when the temperature of the polymerization kettle drops to 5°C, add 0.2 parts of a compound of dicumyl peroxide, ferrous sulfate and sodium formaldehyde sulfoxylate (mass ratio 1:1:1) and tert 0.4 parts of dodecyl mercaptan, the polymerization reaction temperature is controlled at 5°C, the polymerization reaction time is controlled at 10 hours, and the compound of diethyl hydroxylamine or hydroxylamine sulfate an...

Embodiment 2

[0051]①Preparation of enhanced copolymer latex: Add 200 parts of water, 40 parts of acrylonitrile, 8 parts of sodium dodecylbenzenesulfonate, and 60 parts of isoprene into the polymerization kettle, and test the pressure with nitrogen gas to confirm that there is no leakage in the polymerization kettle Finally, replace with nitrogen for several times, then add 60 parts of butadiene, add 1.0 parts of attapulgite, spray 1.0 parts of methyltrimethoxysilane, start the polymerization kettle to stir, then pass cold water into the polymerization kettle to cool down, wait When the temperature of the polymerization kettle drops to 15°C, add 0.5 parts of dicumyl peroxide, sodium iron ethylenediamine tetraacetate, and ferrous sulfate (mass ratio 1:1:1) and tert-dodecyl 0.8 parts of carbon mercaptan, the polymerization reaction temperature is controlled at 15°C, the polymerization reaction time is controlled at 15 hours, and when the monomer conversion rate is 75%, the compound of diethyl ...

Embodiment 3

[0055] ①Modification of attapulgite: In the mixer, add 100 parts of water, add 20 parts of attapulgite, start the mixer and stir until attapulgite forms a suspension. Add 8 parts of dispersed attapulgite suspension into a beaker, add 15 parts of 4 mol / L hydrochloric acid, and stir at 70° C. to obtain attapulgite hydrochloric acid solution. Add 0.6 parts of dodecyltrimethylammonium bromide solution, stir for 2 hours, then wash, filter and dry to obtain modified attapulgite. ②Preparation of enhanced copolymer latex: Add 300 parts of water, 30 parts of acrylonitrile, 5 parts of sodium dodecylbenzenesulfonate, and 30 parts of isoprene into the polymerization kettle, and test the pressure with nitrogen gas to confirm that the polymerization kettle has no leakage Finally, replace with nitrogen several times, then add 70 parts of butadiene, add 0.6 parts of modified attapulgite, spray 0.6 parts of 2,5-dimethyl-2,5 di-tert-butylperoxyhexane, start Stir the polymerization kettle, then...

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Abstract

The invention discloses a preparation method of a modified powder butadiene-acrylonitrile-isoprene polymer. The preparation method comprises the following steps: adding water, acrylonitrile, an emulsifier and isoprene into a polymerization kettle; displacing with nitrogen repeatedly; adding butadiene, attapulgite and a silane coupling agent; when the temperature of the polymerization kettle is reduced to 5-15 DEG C, adding an initiator and a molecular weight regulator; when the polymerization reaction temperature is controlled to 5-15 DEG C and the monomer conversion rate is 60-75%, adding a terminator, and degassing to obtain copolymer latex; adding the copolymer latex and water into a coagulation kettle, stirring and heating; at a coagulation temperature of 40-80 DEG C, adding a separant and a coagulant, and adjusting the pH value of the system to 7-10; stirring for 3-6 hours at 40-80 DEG C for curing; and washing, dehydrating and drying to obtain the modified powder butadiene-acrylonitrile-isoprene polymer. The content of acrylonitrile in the obtained product is 20-35% by mass, the Mooney viscosity ML (1+4) <100 DEG C> is 40-80, the 300% stress at definite elongation is 12-15MPa, the tensile strength is more than or equal to 26.0MPa, the water content is less than or equal to 1.0%, and the powder yield is more than or equal to 99.5%.

Description

technical field [0001] The invention relates to a method for preparing powdered rubber, in particular to a method for preparing a modified powdered butadiene-acrylonitrile-isoprene polymer. Background technique [0002] As a polymer material with unique properties, rubber is widely used in various fields such as automobiles, chemicals, electronics, machinery manufacturing, and aerospace. Compared with block or sheet rubber, powder rubber only changes the shape of rubber, but does not change the basic properties of rubber. Powdered rubber has the advantages of short mixing time, low power consumption, low debinding temperature and good final dispersion. With the progress of the rubber processing industry, the use of powdered rubber is becoming more and more extensive, the demand is increasing, and new varieties and grades are constantly emerging. [0003] Attapulgite is a hydrous magnesium-rich aluminum silicate mineral with a unique natural nano-layer chain molecular struc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08C1/14C08F236/12C08F2/44C08K9/04C08K3/34C08K5/5419C08K5/14C09C1/42C09C3/12
Inventor 梁滔魏绪玲刘宝勇杨珊珊丛日新龚光碧李晶郑聚成徐典宏
Owner PETROCHINA CO LTD