Viscosity-reducing type polycarboxylic acid water reducing agent preparation method
A technology of viscous polycarboxylate and water reducer, which is applied in the field of construction admixtures, can solve the problems of polycarboxylate water reducer dispersibility and dispersion retention, increase of concrete viscosity, large consumption of sand and gravel, etc., and achieve improvement Effects of competitive adsorption capacity, hydration film thickness, and large steric hindrance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0025] Add 40g of ethylene glycol vinyl ether, 80g of 2-butane phosphate-1,2,4-tricarboxylic acid, 1g of concentrated sulfuric acid and 0.1g of hydroquinone into the first reactor equipped with a condensing device. The temperature is kept at 120℃ for 6h, and after the reaction is finished, the temperature is lowered to 40℃, and then the product is mainly 2-butane phosphate-1,2,4-tricarboxylic acid carboxyl group is esterified with a small amount of 2-butane phosphate-1, The carboxyl group in 2,4-tricarboxylic acid is esterified by two esters and three esterified monomers A1.
Embodiment 2
[0027] Add 45g of 4-hydroxybutyl vinyl ether, 80g of 2-butane phosphate-1,2,4-tricarboxylic acid, 0.8g of dibutyltin oxide and 0.1g of p-hydroxyanisole to the first unit equipped with a condenser In the reactor, under the protection of nitrogen, the temperature is kept at 110°C for 6h. After the reaction, the temperature is reduced to 40°C. The product is mainly 2-butane-1,2,4-tricarboxylic acid esterified by a single carboxyl group and a small amount of 2 -Butane phosphate-1,2,4-tricarboxylic acid in which the carboxyl group is esterified by two and three esterified monomers A2.
Embodiment 3
[0029] 65g cyclohexyl-1,4-dimethanol monovinyl ether, 80g 2-phosphobutane-1,2,4-tricarboxylic acid, 0.9g heteropolyacid and 0.1g phenothiazine were added to the condenser equipped with In the first reactor, under the protection of nitrogen, the temperature is kept at 110°C for 6 hours, and the temperature is lowered to 40°C after the reaction is completed. The product in which the carboxyl group of 2-butane-1,2,4-tricarboxylic acid is mainly esterified and A small amount of 2-butane phosphate-1,2,4-tricarboxylic acid has two esterified carboxyl groups and three esterified monomers A3.
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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