A kind of styrene-butadiene latex and its preparation method and application

A styrene-butadiene latex and reaction technology, applied in the field of asphalt modifiers, can solve the problems of low latex solid content, low softening point of modified emulsified asphalt, etc.

Active Publication Date: 2022-05-27
山东京博中聚新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to differences in application fields, the existing styrene-butadiene latex used as a binder is difficult to apply to asphalt modification. The specific performance is that the solid content of the latex is low, and the softening point of the prepared modified emulsified asphalt is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a kind of preparation method of styrene-butadiene latex, comprising the following steps:

[0023] a) 0.25-2.1 part by weight of emulsifier, 0.1-0.5 part by weight of molecular weight regulator, 0.025-0.175 part by weight of diffusing agent, 0.1-0.8 part by weight of free radical stabilizer, 0.1-0.3 part by weight of electrolyte and 50-70 parts by weight of water are mixed for temperature adjustment, and when the temperature of the mixed system reaches 5-15° C., 60-80 parts by weight of butadiene (the first monomer), 20-40 parts by weight of butadiene (first monomer), 20-40 parts by weight are added to the mixed system. Parts of styrene (second monomer), 0.5-4 parts by weight of tertiary amine monomer (third monomer) and 0.05-0.2 parts by weight of initiator are reacted;

[0024] The tertiary amine monomers include N-methyldiethanolamine, triethanolamine, dodecyldimethylamine, tributylamine, trimethylamine, hexadecyldimethylamine, dodecylbenzylmeth...

Embodiment 1

[0047] Use 2L polymerization kettle, the charging amount is 1200g in total; first vacuumize, then replace with nitrogen, add 3.5 parts by weight of sodium rosin aqueous solution (emulsifier aqueous solution, mass concentration is 27%), tert-hexadecyl mercaptan in the polymerization kettle (Molecular weight regulator) 0.4 parts by weight, sodium methylene dinaphthalene sulfonate aqueous solution (diffusing agent aqueous solution, mass concentration of 30%) 0.3 parts by weight, hexadecylamine polyoxyethylene ether oxide (radical stabilizer, Manufacturer: Shanghai Highland Industrial Co., Ltd., brand name: 1610) 0.6 weight part, sodium bicarbonate (electrolyte) 0.1 weight part and deionized water 66 weight part, start stirring, when the temperature in the reaction kettle reaches 6 ℃, put the diacetyl 70 parts by weight of olefin (1st monomer), 30 parts by weight of styrene (2nd monomer), 1.9 parts by weight of N-methyldiethanolamine (3rd monomer), 0.15 parts by weight of hydrogen ...

Embodiment 2

[0050] Use 2L polymerization kettle, the charging amount is 1200g in total; first vacuumize, then replace with nitrogen, add sodium rosin aqueous solution (emulsifier aqueous solution, mass concentration is 25%) 3.45 parts by weight, tert-dodecyl mercaptan in the polymerization kettle (molecular weight regulator) 0.3 parts by weight, sodium lignosulfonate aqueous solution (diffusing agent aqueous solution, mass concentration 25%) 0.3 parts by weight, octadecylamine polyoxyethylene ether oxide (radical stabilizer, manufacturer: Shanghai Jijing Industrial Co., Ltd., trade mark: 1805) 0.4 weight part, potassium chloride (electrolyte) 0.1 weight part and deionized water 63 weight part, start stirring, when the temperature in the reactor reaches 9 ℃, the butadiene (No. One monomer) 70 parts by weight, styrene (second monomer) 30 parts by weight, hexadecyldimethylamine (third monomer) 4 parts by weight, hydrogen peroxide paramenane (initiator) 0.1 weight parts 0.7 parts by weight of...

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Abstract

The invention belongs to the field of asphalt modifiers, in particular to a styrene-butadiene latex and its preparation method and application. The preparation method provided by the present invention comprises the following steps: a) mixing emulsifier, molecular weight regulator, diffusing agent, free radical stabilizer, electrolyte and water to adjust the temperature, and when the temperature of the mixing system reaches 5-15°C, add the mixture to the mixing system Add butadiene, styrene, tertiary amine monomer and initiator to react; b) After the reaction is carried out for 4-6 hours, add a cross-linking agent to the reaction system, and then raise the temperature to 20-40°C to continue the reaction for 0.5-2 hours ; c) after the reaction, the obtained reaction product is mixed with an anti-aging agent and degassed to obtain styrene-butadiene latex. The method provided by the present invention can make the prepared styrene-butadiene latex have higher solids by adopting low-temperature two-stage polymerization, adding an appropriate amount of tertiary amine monomers to participate in copolymerization and adding an appropriate amount of organic matter containing active halogen groups as a crosslinking agent. content and excellent asphalt modification ability.

Description

technical field [0001] The invention belongs to the field of asphalt modifiers, and in particular relates to a styrene-butadiene latex and a preparation method and application thereof. Background technique [0002] Since the 1990s, my country's highway industry has developed by leaps and bounds. In order to improve the performance of the pavement and prolong the service life of the pavement, heavy traffic asphalt and polymer modified asphalt have been widely used in the construction and maintenance of highways and high-grade highways. With the demand of highway construction in my country, the technical progress of emulsified asphalt and the improvement of emulsification equipment and construction machinery, modified emulsified asphalt has also been gradually developed and popularized in my country's road engineering. [0003] Styrene-butadiene latex (abbreviation: SBRL) is a commonly used emulsified asphalt modifier, which is mainly used to improve low-temperature properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F236/10C08F212/08C08F2/00C08L95/00C08L25/14
CPCC08F236/10C08L95/005C08L2201/54C08F212/08C08F2/001C08L25/14
Inventor 郭平云张晓岭刘清钊牟庆平栾波任学斌
Owner 山东京博中聚新材料有限公司
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