Preparation method for polycarboxylic acid high-performance water reducer
A high-performance, water-reducing agent technology, applied in the field of preparation of polycarboxylate high-performance water-reducing agents, can solve the problems of collapse, complicated synthesis process of water-reducing agent, unstable quality of free radical polymerization products, etc. Cost, easy process control, high dispersion effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0022] A) In the reactor, add methacrylic acid and polyethylene glycol monomethyl ether (molecular weight is 2500) by 1: 1 molar ratio, then add catalyst p-toluenesulfonic acid (consumption is 1% of methacrylic acid weight), Composite polymerization inhibitor (the molar ratio of hydroquinone to copper powder is 1:1, and the dosage is 0.4% of the weight of methacrylic acid), water-carrying agent xylene (the dosage is 2 times of the weight of methacrylic acid), stirring and heating To 120°C, keep the reaction for 10 hours to obtain polyoxyethylene ether methacrylate;
[0023] B) Add 200g of water and initiator sodium persulfate 0.5g in the reactor, then slowly dropwise add 100g of mixed solution containing sodium allyl sulfonate, polyoxyethylene ether methacrylate, and methacrylic acid, and alkene in the mixed solution The weight ratio between sodium propyl sulfonate, polyoxyethylene ether methacrylate and methacrylic acid is 1:8:1, stir and heat to 100°C, react for 5 hours and ...
Embodiment 2
[0025] A) in the reactor, add methacrylic acid and polyethylene glycol monomethyl ether (molecular weight is 3000) by 1: 1 molar ratio, then add catalyst p-toluenesulfonic acid (consumption is 1% of methacrylic acid weight), Composite polymerization inhibitor (hydroquinone and copper powder molar ratio is 1: 2, consumption is 0.4% of methacrylic acid weight), water-carrying agent toluene (consumption is 3 times of methacrylic acid weight), stirring and heating to 100°C, keep the reaction for 10 hours to obtain polyoxyethylene ether methacrylate;
[0026] B) Add 200g of water and 0.4g of initiator ammonium persulfate into the reactor, then slowly add 120g of a mixed solution containing allyl sulfonate, polyoxyethylene ether methacrylate, and methacrylic acid dropwise, and the alkene in the mixed solution The weight ratio between sodium propylsulfonate, polyoxyethylene ether methacrylate and methacrylic acid is 1:8:2, stir and heat to 100°C, react for 5 hours and add chain trans...
Embodiment 3
[0028] A) in the reactor, add methacrylic acid and polyethylene glycol monomethyl ether (molecular weight is 3000) by 1: 1 molar ratio, then add catalyst p-toluenesulfonic acid (consumption is 1% of methacrylic acid weight), Composite polymerization inhibitor (the molar ratio of hydroquinone to copper powder is 1:3, the dosage is 0.4% of the weight of methacrylic acid), water-carrying agent xylene (the dosage is 3 times of the weight of methacrylic acid), stirring and heating To 120°C, keep the reaction for 10 hours to obtain polyoxyethylene ether methacrylate;
[0029] B) 200g of water and 0.8g of initiator sodium persulfate are added in the reactor, then slowly dropwise add 110g of mixed solution containing allyl sulfonate, polyoxyethylene ether methacrylate, and methacrylic acid, and the alkene in the mixed solution is The weight ratio between sodium propylsulfonate, polyoxyethylene ether methacrylate and methacrylic acid is 1:8:2, stir and heat to 100°C, react for 5 hours ...
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