Preparation method of modified hyperbranched polyester for environment-friendly dust suppressant

A hyperbranched polyester modification technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of long time-consuming and low efficiency of the synthesis process, and achieve shortened time-consuming synthesis process, strong flexibility, and dust prevention Flappy effect

Inactive Publication Date: 2015-09-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of modified hyperbranched polyester takes

Method used

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  • Preparation method of modified hyperbranched polyester for environment-friendly dust suppressant
  • Preparation method of modified hyperbranched polyester for environment-friendly dust suppressant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a monomer N, the preparation of N-dihydroxyethyl-3-aminopropionic acid methyl ester

[0027] Add 1 mole part of methanol into the reactor, slowly add 1 mole part of diethanolamine (DEA) under stirring, continue to stir for 15 minutes, slowly add 1.05 mole part of methyl acrylate (MA) dropwise, and heat up to 40°C for 4 hours after the addition is complete. , and then evacuated to obtain a colorless transparent oil, namely N, N-dihydroxyethyl-3-aminopropionic acid methyl ester.

[0028] Preparation of b second generation hyperbranched polyester

[0029] Add 1 mole part of pentaerythritol and 0.04 mole part of catalyst p-toluenesulfonic acid into the reactor, raise the temperature to 140°C, start stirring, and add dropwise 4 mole parts of N, N-dihydroxyethyl-3-aminopropionic acid methyl ester , N 2 After the protection reaction for 3 hours, vacuumize for 1 hour; add 8 molar parts of N, N-dihydroxyethyl-3-aminopropionic acid methyl ester and 0.08 molar parts of catalyst ...

Embodiment 2

[0035] Monomer N, the preparation method of N-dihydroxyethyl-3-aminopropionic acid methyl ester and second generation hyperbranched polyester is the same as embodiment 1, and difference is:

[0036] a preparation of modified monomer

[0037] Add 1 mole part of stearic acid and 0.01 mole part of catalyst p-toluenesulfonic acid into the reactor, start stirring, raise the temperature to 100°C, start stirring, and dropwise add 1 mole part of N, N-dihydroxyethyl-3- Methyl amine propionate, N 2 After the protection reaction for 3 hours, vacuumize for 1 hour to obtain a dark brown solid, which is the modified monomer.

[0038] Preparation of b modified hyperbranched polyester

[0039]In the reactor, add 1 mole part of the second generation hyperbranched polyester, 14 mole parts of monomer N, N-dihydroxyethyl-3-amine propionate methyl ester and 2 mole parts of modified monomer, and 0.2 mole part of catalyst p-toluenesulfonic acid, N 2 Under protection, magnetic or mechanical stirr...

Embodiment 3

[0041] Monomer N, the preparation method of N-dihydroxyethyl-3-aminopropionic acid methyl ester and second generation hyperbranched polyester is the same as embodiment 1, and difference is:

[0042] a preparation of modified monomer

[0043] Add 1 mole part of stearic acid and 0.06 mole part of catalyst p-toluenesulfonic acid into the reactor, raise the temperature to 140°C, start stirring, and dropwise add 1 mole part of N,N-dihydroxyethyl-3-aminopropionic acid Methyl ester, N 2 After 1.5 h of protection reaction, vacuum was applied for 1 h to obtain a dark brown solid, namely the modified monomer.

[0044] Preparation of b modified hyperbranched polyester

[0045] Add 1 mole part of second-generation hyperbranched polyester, 10 mole parts of monomer N, N-dihydroxyethyl-3-amine propionate methyl ester and 6 mole parts of modified monomer, and 0.005 mole part of catalyst in the reactor p-toluenesulfonic acid, N 2 Under protection, magnetic or mechanical stirring, react at ...

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Abstract

The invention discloses a preparation method of modified hyperbranched polyester. The preparation method comprises the following steps: adopting N,N-2-hydroxyethyl-3-alanine methyl ester as a monomer, pentaerythrotol as the nucleus and p-toluenesulfonic acid as a catalyst to prepare second-generation hyperbranched polyester through mass polymerization; then adopting stearic acid as a modifier, p-toluenesulfonic acid as a catalyst and N,N-2-hydroxyethyl-3-alanine methyl ester as a monomer to prepare a modified monomer; adopting p-toluenesulfonic acid as a catalyst to enable the monomer, the modified monomer and the second-generation hyperbranched polyester to react so as to obtain the modified hyperbranched polyester. The preparation method simplifies the synthesis process, greatly reduces time consumption, meanwhile, reduces the probability of autopolymerization side reaction of the monomer in the growing process of the hyperbranched polyester and improves the efficiency.

Description

technical field [0001] The invention belongs to the field of road surface chemical dust suppression, and in particular relates to a preparation method of modified hyperbranched polyester and an environment-friendly dust suppressant prepared by using the modified hyperbranched polyester. 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, tailings at ports, etc.) place), 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 partic...

Claims

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Application Information

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IPC IPC(8): C08G63/685C08G63/78C09K3/22
Inventor 杨静贾杰吴亚敏刘洋杨坤刘冰杰
Owner SHANDONG UNIV OF SCI & TECH
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