Preparation and application of hyperbranched retarder

A technology of retarder and hyperbranched polymer, which is applied in the field of retarder, can solve the problems of short retarding time and poor fluidity of concrete, and achieve the effect of improving water reducing efficiency, improving retarding performance and reducing the amount of addition

Inactive Publication Date: 2019-01-25
UNIV OF JINAN
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of short retarding time and poor fluidity of concrete, the invention provides a

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
  • Preparation and application of hyperbranched retarder
  • Preparation and application of hyperbranched retarder
  • Preparation and application of hyperbranched retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] (1) Using esterification reaction, under the action of catalyst p-toluenesulfonic acid, benzene is used as solution, toluene is used as water-carrying agent, itaconic acid is used as nucleus molecule, malic acid is used as monomer, and condensation reaction is carried out at 80°C , react for 12-48h, control the algebra of hyperbranching by repeatedly adding monomers, and synthesize the first and second generation hyperbranched polymers. Take a certain amount of hyperbranched polymer and diethanolamine, mix them into a three-necked bottle, add a certain amount of initiator to capping, stir and cool down to 65°C, stir and react for 8 hours, then take a certain amount of hyperbranched polymer and acrylamide , sodium methacrylic sulfonate, mix them into a three-necked bottle, add a certain amount of initiator to polymerize, and finally adjust the pH=7 to 7.5 with 40% sodium hydroxide solution, and then distill under reduced pressure to obtain hyperbranched coagulant finishe...

Embodiment approach 2

[0046] (1) Using esterification reaction, under the action of catalyst p-toluenesulfonic acid, benzene is used as solution, toluene is used as water-carrying agent, itaconic acid is used as nucleus molecule, malic acid is used as monomer, and condensation reaction is carried out at 80°C , react for 12-48h, control the algebra of hyperbranching by repeatedly adding monomers, and synthesize the first and second generation hyperbranched polymers. Take a certain amount of hyperbranched polymer and diethanolamine, mix them into a three-necked bottle, add a certain amount of initiator to capping, stir and cool down to 65°C, stir and react for 8 hours, then take a certain amount of hyperbranched polymer and acrylamide , sodium methacrylic sulfonate, mix them into a three-necked bottle, add a certain amount of initiator to polymerize, and finally adjust the pH=7 to 7.5 with 40% sodium hydroxide solution, and then distill under reduced pressure to obtain hyperbranched coagulant finishe...

Embodiment approach 3

[0050] (1) Using esterification reaction, under the action of catalyst p-toluenesulfonic acid, benzene is used as solution, toluene is used as water-carrying agent, itaconic acid is used as nucleus molecule, malic acid is used as monomer, and condensation reaction is carried out at 80°C , react for 12-48h, control the algebra of hyperbranching by repeatedly adding monomers, and synthesize the first and second generation hyperbranched polymers. Take a certain amount of hyperbranched polymer and diethanolamine, mix them into a three-necked bottle, add a certain amount of initiator to capping, stir and cool down to 65°C, stir and react for 8 hours, then take a certain amount of hyperbranched polymer and acrylamide , sodium methacrylic sulfonate, mix them into a three-necked bottle, add a certain amount of initiator to polymerize, and finally adjust the pH=7 to 7.5 with 40% sodium hydroxide solution, and then distill under reduced pressure to obtain hyperbranched coagulant finishe...

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 relates to the technical field of concrete additives, and more specifically relates to application of a hydroxyl terminated hyperbranched polyester hyperbranched retarder in adjustment of retardation time of concrete. A new hyperbranched retarder is synthesized by synthesizing a carboxyl terminated hyperbranched polymer first, then performing end capping on the carboxyl terminated hyperbranched polymer, and synthesizing the hydroxyl terminated polymer into a main chain. When used in the field of concrete additives, the hyperbranched retarder can well improve the mobility of concrete and prolong the retardation time, and the hyperbranched retarder has a simple and convenient synthesis process, is easy to industrialize and has superior performance.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a retarding method for reducing the hydration speed and heat of hydration of concrete so that fresh concrete can maintain plasticity for a long time, thereby adjusting the setting time of fresh concrete agent. It also relates to its preparation method. Background technique [0002] With the rapid development of industry, concrete has also developed rapidly, and some corresponding concrete admixtures have also begun to develop rapidly. For example, in order to prolong the setting time of cement, retarders have been found. [0003] Concrete super retarder is an admixture that can adjust the setting time of concrete arbitrarily for a long time without affecting the strength of concrete in the later stage. This admixture is mainly used in concrete projects that are constructed under long-term dry and high-temperature environments, and other projects that require concre...

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
IPC IPC(8): C08F283/01C08F220/56C08F228/02C08G63/52C08G63/78C04B24/16C04B103/22
CPCC04B24/163C04B2103/22C08F283/01C08G63/52C08G63/78C08F220/56C08F228/02
Inventor 寿崇琦郭鹏飞
Owner UNIV OF JINAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap