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Releasable butadiene-styrene rubber powder microcapsule for asphalt and preparation method thereof

A technology of styrene-butadiene rubber and microcapsules, applied in microcapsule preparation, microsphere preparation, building components and other directions, can solve the problems of affecting rubber properties, not easy to release, affecting the low temperature ductility of asphalt, etc., to improve the viscosity and improve the asphalt. The effect of softening point

Active Publication Date: 2018-08-10
CHAMBROAD CHEM IND RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, attapulgite is tightly adsorbed on styrene-butadiene rubber, and it is not easy to release after wrapping, and the addition of inorganic materials will definitely affect the properties of the rubber itself. When applied to asphalt modification, it will definitely affect the low-temperature ductility of asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] ①Preparation of anti-aging agent emulsion: Weigh 0.9g of cetyltrimethylammonium chloride, add deionized water to 27g, heat to 50°C to dissolve, add 18g of anti-aging agent SP, stir well, and prepare to 40% ② Weigh 571g of 35% styrene-butadiene latex, add 428g of deionized water to dilute, add 8g of cetyltrimethylammonium chloride, stir evenly, add dropwise the mass fraction of 35-37% hydrochloric acid , the speed is controlled to 5s / d, adjust the latex pH value to 5-6, add the above 1 / 10 anti-aging agent emulsion, stir evenly to obtain cationic styrene-butadiene latex, add 5g4% PVA solution, stir, add 25% KCl dropwise 2.4 g of the solution was agglomerated to obtain styrene-butadiene latex with a large particle size of 100-200 μm. ③Put the large particle size styrene-butadiene latex into the polymerization kettle, add 3.5g of cetyltrimethylammonium chloride, start stirring and add 5g of methyl methacrylate, 1g of butyl acrylate, 0.1g of tert-dodecyl mercaptan, Add 6g o...

Embodiment 2

[0028] Example 2 polystyrene

[0029] ① Preparation of anti-aging agent emulsion: Weigh 0.7g octadecyltrimethylammonium bromide, add deionized water to 12.8g, heat to 35°C to dissolve, add 10.5g N-(1,3-dimethyl ) Butyl-N'-phenyl-p-phenylenediamine, after stirring evenly, was mixed with 45% anti-aging agent emulsion; ② Weighed 571g of 35% styrene-butadiene latex, added 428g of deionized water to dilute, added 7g of eighteen Alkyltrimethylammonium bromide, stir evenly, dropwise add hydrochloric acid with a mass fraction of 35-37%, control the speed at 5s / d, adjust the latex pH value to 5-6, add the above 1 / 10 anti-aging agent emulsion, Stir evenly to obtain cationic styrene-butadiene latex, add 20g of 1% hydroxymethyl cellulose sodium solution, stir, add dropwise 1.6g of 25% KCl solution to agglomerate, and obtain styrene-butadiene latex with a large particle size of 100-200 μm. ③Add the large particle size styrene-butadiene latex in the polymerization kettle, add 4g octadecylt...

Embodiment 3

[0032]①Preparation of anti-aging agent emulsion: Weigh 2.2g of cetyltrimethylammonium chloride, add deionized water to 24.4g, heat to 50°C to dissolve, add 20g of anti-aging agent MB, stir well, and prepare 45 % anti-aging agent emulsion; ② Weigh 571g of 35% styrene-butadiene latex, add 428g of deionized water to dilute, add 6g of cetyltrimethylammonium chloride, stir well, and drop the mass fraction to be 35-37% Hydrochloric acid, speed control is 5s / d, adjust latex pH value to 5-6, add above-mentioned 1 / 10 anti-aging agent emulsion, stir to obtain cationic styrene-butadiene latex, add 15g of 2% hydroxymethyl cellulose sodium solution, stir , 1.8 g of 25% NaCl solution was added dropwise for agglomeration to obtain styrene-butadiene latex with a large particle size of 100-200 μm. ③Weigh 5g of maleic anhydride, 10g of styrene, 20g of acetone, 0.1g of tertiary dodecylmercaptan, and 0.02g of initiator cumene peroxide, heat to 60°C, prepolymerize for 15min, add 40g of water after...

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PUM

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Abstract

The invention relates to a preparation method of an expandable butadiene-styrene rubber powder microcapsule for asphalt. Firstly, an anionic styrene-butadiene latex is transformed into cationic styrene-butadiene latex through a transformation process, so that positive charges exist on the surface of the colloidal particles, large-particle-size butadiene-styrene colloidal particles of 100-200 Mum are formed by an attaching process, the butadiene-styrene colloidal particles are taken as microcapsule core materials, and monomers are added to be adsorbed on the surface of the colloidal particles,grafting reaction is carried out to form a microcapsule shell, and the microcapsule shell is subjected to condensation, granulation and drying to obtain the butadiene-styrene rubber powder microcapsule. The prepared butadiene-styrene rubber powder microcapsule can be used for isolating and preventing clustering, coagulation and the like, and can also be used in the modified asphalt process, the microcapsule is heated and then the shell comes off, the butadiene-styrene rubber is released and swelled in the asphalt, and the effect of modifying the asphalt is achieved.

Description

technical field [0001] The invention relates to the technical field of preparation of styrene-butadiene rubber powder, in particular to a releasable styrene-butadiene rubber powder microcapsule for asphalt and a preparation method thereof. Background technique [0002] At present, there are many production methods of powdered rubber, mainly including mechanical pulverization, spray drying and agglomeration. However, due to the self-adhesive nature of rubber, 20-30% of inorganic or organic release agents need to be added to the rubber to achieve a good isolation effect. Physically coated styrene-butadiene rubber is difficult to release during the use of modified asphalt , and the inorganic release agent will lead to a decrease in the uniformity of the asphalt, which seriously affects the low-temperature ductility of the asphalt. A preparation method of a modified powdered styrene-butadiene rubber introduced in a patent includes: (1) the release agent used is acidified attapu...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L9/06C08L33/12C08L25/08C08L25/06B01J13/14C08F220/14C08F220/18C08F212/08C08F222/06C08F220/06C08F112/08
CPCB01J13/14C08F112/08C08F212/08C08F220/14C08L95/00C08L2205/18C08L9/06C08L33/12C08L25/06C08L35/06C08L25/08C08F220/06C08F222/06C08F220/1804
Inventor 刘清钊马韵升申凯华陈梅梅刘振学崔丽华张杰王欣郭平云张瑞阳韩立霞
Owner CHAMBROAD CHEM IND RES INST CO LTD
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