Environment-friendly dust suppressant containing modified hyperbranched polyester and preparation method thereof

A technology of hyperbranched polyester and dust suppressant, applied in chemical instruments and methods, other chemical processes and other directions, can solve the problems of poor flexibility of the dust suppressant, environmental pollution, etc., and achieves good dust suppression effect, easy operation, The effect of reducing dust pollution and losses

Inactive Publication Date: 2015-01-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor flexibility and environmental pollution of existing pavement dust suppressants, the invention provides a modified hyperbranched polyester environmental dust suppressant and a preparation method thereof

Method used

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  • Environment-friendly dust suppressant containing modified hyperbranched polyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a monomer N, the preparation of N-dihydroxyethyl-3-aminopropionic acid methyl ester

[0036] Take 1 mole part of methanol and add it into the reactor, slowly add 1 mole part of diethanolamine (DEA) under stirring, continue stirring for 15 minutes, then slowly add 1 mole part of methyl acrylate (MA) dropwise, after the addition is completed, heat up to 40°C and keep it warm for 4 hours , and then evacuated to obtain a colorless transparent oil, namely N, N-dihydroxyethyl-3-aminopropionic acid methyl ester.

[0037] Preparation of b third generation hyperbranched polyester

[0038] Add a certain amount of N,N-dimethylformamide (DMF), 1 mole part of pentaerythritol, and 0.04 mole part of p-toluenesulfonic acid into the reactor, raise the temperature to 140°C, start stirring, and drop 4 mole parts of N , N-dihydroxyethyl-3-aminopropionic acid methyl ester, N 2 After 3 hours of protection reaction, vacuumize for 1 hour. Add 8 molar parts of N, N-dihydroxyethyl-3-amine pro...

Embodiment 2

[0044] a monomer N, the preparation of N-dihydroxyethyl-3-aminopropionic acid methyl ester

[0045] Take 1 mole part of methanol and add it to the reactor, slowly add 1 mole part of diethanolamine (DEA) under stirring, continue stirring for 15 minutes, then slowly add 1.2 mole part of methyl acrylate (MA) dropwise, after the addition, heat up to 30°C and keep it warm for 3 hours , and then evacuated to obtain a colorless transparent oil, namely N, N-dihydroxyethyl-3-aminopropionic acid methyl ester.

[0046] Preparation of b third generation hyperbranched polyester

[0047] Add N,N-dimethylformamide (DMF), 1 mole part of starch, and 0.04 mole part of p-toluenesulfonic acid into the reactor, raise the temperature to 110°C, start stirring, and dropwise add 4 mole parts of N,N- Dihydroxyethyl-3-aminopropionic acid methyl ester, N 2 After protecting the reaction for 1.5h, vacuumize for 1.5h. Add 8 molar parts of N, N-dihydroxyethyl-3-amine propionic acid methyl ester and 0.10 m...

Embodiment 3

[0053] a monomer N, the preparation of N-dihydroxyethyl-3-aminopropionic acid methyl ester

[0054] Take 1 mole part of methanol and add it to the reactor, slowly add 1 mole part of diethanolamine (DEA) under stirring, continue stirring for 15 minutes, then slowly add 2.5 mole parts of methyl acrylate (MA) dropwise, after the addition is completed, heat up to 50°C and keep it warm for 2 hours , and then evacuated to obtain a colorless transparent oil, namely N, N-dihydroxyethyl-3-aminopropionic acid methyl ester.

[0055] Preparation of b third generation hyperbranched polyester

[0056] Add N,N-dimethylformamide (DMF), 1 mole part of pentaerythritol, and 0.04 mole part of p-toluenesulfonic acid into the reactor, raise the temperature to 120°C, start stirring, and dropwise add 3 mole parts of N,N- Dihydroxyethyl-3-aminopropionic acid methyl ester, N 2 After protecting the reaction for 2 hours, vacuumize for 1.5 hours. Additional 6 molar parts of N, N-dihydroxyethyl-3-amine ...

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Abstract

The invention discloses an environment-friendly dust suppressant containing modified hyperbranched polyester. According to the dust suppressant, N, N- dihydroxyethyl-3-amine methyl propionate is taken as a monomer, pentaerythritol or starch is taken as a nucleus, p-toluene sulfonic acid is taken as a catalyst, N, N-DMF (dimethyl formamide) is taken as a solvent, and third-generation hyperbranched polyester is prepared with a solution polymerization method; then stearic acid is taken as a modifier, p-toluene sulfonic acid is taken as the catalyst, and modified hyperbranched polyester is obtained and compounded with a surfactant and water to prepare the environment-friendly dust suppressant containing the modified hyperbranched polyester. After the dust suppressant is sprayed, fine particulate matters in a field can keep higher moisture content and generate gelling, dust is prevented from flying, and the dust suppression effect is good; the dust suppressant has high flexibility, is not crushed and damaged easily in practical application, has no corrosion on metal, has good degradability, and is non-toxic and free of environmental pollution.

Description

technical field [0001] The invention belongs to the field of road surface chemical dust suppression, and in particular relates to a modified hyperbranched polyester environmental dust suppression agent and a preparation method thereof. Background technique [0002] The chemical dust suppressant is prepared by mixing a variety of chemical reagents such as surfactants and other additives with a large amount of water, and sprays it on the dusty surface (unpaved roads, open stockpiles, port tailings, etc.) After that, quickly wet or bond the surface particles of the dust surface. Due to its excellent moisture absorption and moisture retention performance, sticky dust fixation performance, and rapid film-forming characteristics, the interaction between capillary water and dust particles, or the binding of the binder to the The bonding effect of the dust particles, or the consolidation of the surface film layer on the dust particles, thereby inhibiting the dust on the dust surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/22C08G83/00
Inventor 杨静刘丹丹高建广刘冰杰
Owner SHANDONG UNIV OF SCI & TECH
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