Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of ternary random copolymer and its preparation method and application

A technology of random copolymer and structural unit, applied in the field of ternary random copolymer and its preparation, can solve the problems of long side chain breakage, lack of dispersibility, offset slump retention ability, etc., and achieve the effect of reducing loss

Active Publication Date: 2015-11-25
LIAONING OXIRANCHEM INC
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this type of copolymer is that there is no dispersibility in the early stage, and in the later stage, as the ester bond is hydrolyzed and the carboxyl group is released, the long side chain that acts as a steric hindrance will also be broken, which will offset part of the slump retention ability. The slump retention ability of polymers still needs to be improved

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 ternary random copolymer and its preparation method and application
  • A kind of ternary random copolymer and its preparation method and application
  • A kind of ternary random copolymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] In the preparation method of the present invention, the polymerization initiator can be a persulfide such as ammonium persulfate, an azo compound such as azoisobutyronitrile, or a redox type initiator composed of hydrogen peroxide and L-ascorbic acid , and its amount is generally 0.4 to 9% of the total moles of each monomer.

[0043] In the preparation method of the present invention, the chain transfer agent may be mercaptoacetic acid, mercaptopropionic acid, mercaptoethanol, sodium methacrylate, etc., and its dosage is generally 0-5% of the total moles of each monomer.

[0044] In the preparation method of the present invention, the reaction temperature is generally 40-90° C., the reaction time is usually 1-5 hours, and after the reaction is completed, constant temperature aging is often required for 1-2 hours.

Embodiment 1

[0049] In the reactor that is equipped with stirrer, thermometer, add 92.0g water and 75.0g monomer B (monomer B is the adduct of allyl alcohol and ethylene oxide that the weight average molecular weight is 2200), 9.8g monomer A (A is a mixture of dimethyl maleate and hydroxypropyl methacrylate, the molar ratio of the two is 2:1), 7.4g of monomer C (maleic anhydride), stirring and heating to 80 ° C, and then drop Add initiator (0.71g ammonium persulfate and 40g water mixture), drop time is 3 hours, aging time is 2 hours, then temperature drops to 30°C, add a certain amount of lye to neutralize to about pH value 6, get this product Invented terpolymers. After measurement (GC), the weight average molecular weight of the obtained copolymer was 24700.

Embodiment 2

[0051] In the reactor that is furnished with stirrer, thermometer, add 68.1g deionized water and 120.5g monomer B (monomer B is the adduct of methacryl alcohol and ethylene oxide, weight average molecular weight is 2400), Raise the temperature and stir to 55°C, add 7g of 2% hydrogen peroxide aqueous solution, stir for 5 minutes and then dropwise add 6.2g of monomer C (acrylic acid), 8.5g of monomer A (hydroxyethyl methacrylate) and 6.0g of deionized Aqueous solution L1 made of water, aqueous solution L2 made of 0.82g ascorbic acid, 0.15g mercaptopropionic acid and 38.0g deionized water. The L1 solution was dropped in 3 hours, and the L2 solution was dropped in 2.5 hours. After the dropwise addition of the L1 solution, aging at a constant temperature of 55°C for 1.5 hours, then lowering the temperature to 30°C, adding a certain amount of lye to neutralize to a pH value of about 6, and obtaining the ternary random copolymer of the present invention. After measurement (GC), the ...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a ternary random copolymer, which is composed of the structural units of three monomers shown in formula (I), (II) and (III). The copolymer has a weight average molecular weight of 10000-50000, with the meaning of each symbol in the formulas being shown in the specification. The invention also discloses a method for preparation of the ternary random copolymer. Specifically, in the presence of a polymerization initiator and a chain transfer agent, the monomer A, B and C are subjected to free radical random polymerization in an aqueous solution. The ternary random copolymer provided in the invention can be used as a high slump retaining polycarboxylic water reducer. When the polycarboxylic water reducer is added into concrete, it can slowly hydrolyze in an alkali environment of concrete and continuously release carboxyl, so that a dispersing effect on cement particles can be maintained for a long time, and too rapid loss of concrete slump can be reduced.

Description

technical field [0001] The present invention relates to a ternary random copolymer and a preparation method thereof, more specifically, the present invention relates to a ternary random copolymer which can be used as a high slump polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the continuous popularization and application of polycarboxylate superplasticizers in commercial concrete, the problem of rapid slump loss has become increasingly prominent, especially in high temperature environments, the problem of rapid slump loss has seriously restricted its application in commercial concrete. in the application. In order to solve this problem, it is necessary to prepare a high-slump polycarboxylate superplasticizer. [0003] US5162402 discloses a copolymer of allyl ether and maleic acid alkoxy polyether monoester. When this copolymer is used in combination with an acrylic acid copolymer, the acrylic acid copolymer is first adsorb...

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): C08F283/06C04B24/26C04B103/30
Inventor 朱建民刘兆斌董振鹏仲崇刚周立明于连林
Owner LIAONING OXIRANCHEM INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com