Styrene-butadiene latex and preparation method and application thereof

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

Active Publication Date: 2020-10-23
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, comprises the following steps:

[0023] a) 0.25 to 2.1 parts by weight of emulsifier, 0.1 to 0.5 parts by weight of molecular weight regulator, 0.025 to 0.175 parts by weight of diffusing agent, 0.1 to 0.8 parts by weight of free radical stabilizer, 0.1 to 0.3 parts by weight of electrolyte and 50-70 parts by weight of water are mixed and adjusted, 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 Parts of styrene (the second monomer), 0.5 to 4 parts by weight of the tertiary amine monomer (the third monomer) and 0.05 to 0.2 parts by weight of the initiator react;

[0024] The tertiary amine monomers include N-methyldiethanolamine, triethanolamine, dodecyldimethylamine, tributylamine, trimethylamine, hexadecyldimethylamine, dodecylbenzylmethyl One or more of amine and N-methyldicyclohexylamine;

[0...

Embodiment 1

[0047] Using a 2L polymerization kettle, the feeding amount is 1200g in total; first vacuumize, then replace with nitrogen, add 3.5 parts by weight of sodium abietate aqueous solution (emulsifier aqueous solution, mass concentration is 27%), tert-hexadecyl mercaptan in the polymerization kettle (molecular weight modifier) ​​0.4 weight part, sodium methylene dinaphthalene sulfonate aqueous solution (diffusion agent aqueous solution, mass concentration is 30%) 0.3 weight part, cetylamine polyoxyethylene ether oxide (radical stabilizer, Manufacturer: Shanghai Highland Barley Industrial Co., Ltd., brand name: 0.6 parts by weight of 1610), 0.1 parts by weight of sodium bicarbonate (electrolyte) and 66 parts by weight of deionized water, start stirring, and when the temperature in the reaction kettle reaches 6 ° C, distillate 70 parts by weight of alkene (the first monomer), 30 parts by weight of styrene (the second monomer), 1.9 parts by weight of N-methyldiethanolamine (the third m...

Embodiment 2

[0050] Using a 2L polymerization kettle, the feeding amount is 1200g in total; first vacuumize, then replace with nitrogen, add 3.45 parts by weight of sodium abietate aqueous solution (emulsifier aqueous solution, mass concentration is 25%), tert-dodecyl mercaptan in the polymerization kettle (Molecular weight regulator) 0.3 weight part, sodium lignosulfonate aqueous solution (diffusion agent aqueous solution, mass concentration is 25%) 0.3 weight part, octadecylamine polyoxyethylene ether oxide (free radical stabilizer, manufacturer: Shanghai Highland Barley Industrial Co., Ltd., brand: 0.4 parts by weight of 1805), 0.1 parts by weight of potassium chloride (electrolyte) and 63 parts by weight of deionized water, start stirring, and when the temperature in the reactor reaches 9 ° C, the butadiene (No. One monomer) 70 parts by weight, 30 parts by weight of styrene (the second monomer), 4 parts by weight of hexadecyldimethylamine (the third monomer), 0.1 parts by weight of hydr...

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Abstract

The invention belongs to the field of asphalt modifiers, and particularly relates to styrene-butadiene latex and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: a) mixing an emulsifier, a molecular weight regulator, a dispersing agent, a free radical stabilizer, an electrolyte and water, regulating the temperature, and adding butadiene, styrene, a tertiary amine monomer and an initiator into the mixed system for reaction when the temperature of the mixed system reaches 5-15 DEG C, b) after the reaction is carried outfor 4-6 hours, adding a cross-linking agent into the reaction system, then heating to 20-40 DEG C, and continuously reacting for 0.5-2 hours, and c) after the reaction is finished, mixing the obtained reaction product with an anti-aging agent, and degassing to obtain the styrene-butadiene latex. According to the method provided by the invention, by adopting a low-high temperature two-stage methodfor polymerization, adding a proper amount of tertiary amine monomer to participate in copolymerization and adding a proper amount of organic matter containing an active halogen group as a cross-linking agent, the prepared styrene-butadiene latex has relatively high solid content and excellent asphalt modification capability.

Description

technical field [0001] The invention belongs to the field of asphalt modifiers, in particular to a styrene-butadiene latex and its preparation method and application. Background technique [0002] Since the 1990s, my country's highway industry has advanced 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 expressways and high-grade highways. With the demand of road construction in our country and the technical progress of emulsified asphalt and the improvement of emulsified equipment and construction machinery, modified emulsified asphalt has also been gradually developed and popularized in road engineering in my country. [0003] Styrene-butadiene latex (abbreviation: SBRL) is currently a commonly used emulsified asphalt modifier, mainly used to improve low-temperature properties such as low-temp...

Claims

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Application Information

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Patent Type & Authority Applications(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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