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Production method of styrene butadiene latex modified emulsified asphalt

A technology of styrene-butadiene latex and emulsified asphalt, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of poor storage and transportation stability, difficult to mix evenly, etc., achieves convenient storage and transportation, improves softening point, and has broad industrial application prospects. Effect

Inactive Publication Date: 2011-09-21
合肥宝盈新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a production method for modifying emulsified asphalt with styrene-butadiene latex, and the obtained product overcomes the problems that the traditional emulsified modified asphalt is difficult to mix evenly and has poor storage and transportation stability

Method used

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  • Production method of styrene butadiene latex modified emulsified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Prepare 1000 g of an aqueous solution containing 0.3 wt % of starch and 6 wt % of 325-mesh organobentonite, stir evenly, adjust the pH to 4 to 5 with hydrochloric acid, and obtain solution A after standing for 20 hours;

[0012] (2) Prepare 1000 g of an aqueous solution containing 0.6wt% diquaternary ammonium cationic emulsifier and 4wt% styrene-butadiene latex with a solid content of 40%, adjust the pH to 5-6 with hydrochloric acid, and then heat to 55-60°C to obtain solution B;

[0013] (3) Weigh 1500g of asphalt and heat it to 100-120°C, add the above-mentioned liquid A and liquid B into it, and shear at a high speed in a colloid mill at 2800 rpm for 1-4 minutes to obtain an asphalt emulsion with a solid content of 60%, and stir evenly After defoaming, it is made into modified emulsified asphalt.

Embodiment 2

[0015] (1) Prepare 1000 g of an aqueous solution containing 0.1wt% starch and 10wt% 325-mesh organobentonite, stir evenly, adjust pH=4 to 5 with hydrochloric acid, and obtain solution A after standing for 20 hours;

[0016] (2) Prepare 1000 g of an aqueous solution containing 0.2wt% diquaternary ammonium cationic emulsifier and 6wt% styrene-butadiene latex with a solid content of 40%, adjust the pH to 5-6 with hydrochloric acid, and then heat to 55-60°C to obtain solution B;

[0017] (3) Weigh 1500g of asphalt and heat it to 100-120°C, add the above-mentioned liquid A and liquid B into it, and shear at a high speed in a colloid mill at 2800 rpm for 1-4 minutes to obtain an asphalt emulsion with a solid content of 58%, and stir evenly After defoaming, it is made into modified emulsified asphalt.

Embodiment 3

[0019] (1) Prepare 1000 g of an aqueous solution containing 0.5wt% starch and 1wt% 325-mesh organobentonite, stir evenly, adjust pH=4 to 5 with hydrochloric acid, and obtain solution A after standing for 20 hours;

[0020] (2) Prepare 1000 g of an aqueous solution containing 1.2 wt % of diquaternary ammonium salt cationic emulsifier and 1 wt % of styrene-butadiene latex with a solid content of 40%, adjust pH=5 to 6 with hydrochloric acid, and then heat to 55 to 60° C. to obtain solution B;

[0021] (3) Weigh 1500g of asphalt and heat it to 100-120°C, add the above-mentioned liquid A and liquid B into it, and shear at a high speed in a colloid mill at 2000 rpm for 1-4 minutes to obtain an asphalt emulsion with a solid content of 58%, and stir evenly After defoaming, it is made into modified emulsified asphalt.

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Abstract

The invention discloses a production method of styrene butadiene latex modified emulsified asphalt. The method comprises the following steps: firstly preparing 1-10wt% of organic bentonite and 0.1-0.5wt% of starch aqueous solution A, secondly preparing 1-6wt% of styrene butadiene latex and 0.2-1.2wt% of emulsifier solution B, using asphalt, the solution A and the solution B in a weight ratio of 1.5:1:1 to shear in a colloid mill for 1-4 minutes, stirring evenly and defoaming to obtain styrene butadiene latex modified emulsified asphalt. The production method of styrene butadiene latex modified emulsified asphalt of the invention is easy and accessible, the low-temperature crack resistance, high temperature stability, resilience and adhesivity to aggregate of the asphalt can be fully increased, namely the softening point, low-temperature ductility, toughness, tenacity and the like of asphalt are increased, and the industrial application prospect is wide.

Description

technical field [0001] The invention relates to a production method of modified emulsified asphalt, in particular to a production method of styrene-butadiene latex modified emulsified asphalt. Background technique [0002] Asphalt has excellent waterproof and bonding properties, and is rich in resources and low in price, so it has been widely used as road construction materials, waterproof materials and sealing materials for a long time. However, due to the low relative molecular weight of asphalt and its wide distribution, its mechanical properties are highly sensitive to temperature, it is easy to become brittle at low temperature, easy to flow at high temperature, has almost no elasticity, and has poor aging resistance, which greatly limits the wide use of asphalt. . Using polymer materials to modify asphalt is an effective way to reduce the temperature sensitivity of asphalt materials, increase the softening point, reduce the embrittlement temperature, improve the cohes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/08C08L3/02C08K9/04C08K3/34C08J3/03
Inventor 车春玲
Owner 合肥宝盈新材料科技股份有限公司