Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of preparation method for the modified hyperbranched polyester of environment-friendly dust suppressant

A technology of hyperbranched polyester and modification, applied in the field of chemical dust suppression of pavement, can solve the problems of long time-consuming and low efficiency of the synthesis process, and achieve the effect of shortening the time-consuming of the synthesis process, strong flexibility, and not easy to be crushed and damaged.

Inactive Publication Date: 2016-08-24
SHANDONG UNIV OF SCI & TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis process of modified hyperbranched polyester takes a long time, the synthesis time reaches 8.5-15h, and the efficiency is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method for the modified hyperbranched polyester of environment-friendly dust suppressant
  • A kind of preparation method for the modified hyperbranched polyester of 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 stirri...

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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com