A kind of isocyanate chain extension modified polycarboxylate water reducing agent and preparation method thereof
A technology of isocyanate and polycarboxylic acid is applied in the field of cement additives to achieve the effects of improving dispersion stability, increasing plastic viscosity and reducing segregation and bleeding
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0032] An isocyanate chain-extended modified polycarboxylate water reducer and a preparation method thereof are generated by radical polymerization of the following raw materials in parts by weight:
[0033] Bottom liquid: methallyl polyoxyethylene ether: 350, deionized water: 220;
[0034] Oxidant: hydrogen peroxide: 2.5;
[0035] Solution A: Acrylic acid: 36.75, toluene diisocyanate: 5.25, deionized water: 42;
[0036] Solution B: mercaptopropionic acid: 1.5, sodium hypophosphite: 2.0, ascorbic acid: 0.8, 1,4-dihydroxybutane: 3.0, deionized water: 110;
[0037] Ammonia: 12.
[0038] The isocyanate chain extension modified polycarboxylate water reducer and the preparation method thereof comprise the following steps: 350 g of methallyl polyoxyethylene ether and 220 g of deionized water are dropped into the bottom of the reaction vessel, and mixed uniformly; hydrogen peroxide is selected as an oxidizing agent, ascorbic acid As a reducing agent, mercaptopropionic acid and sod...
Embodiment 2
[0040] An isocyanate chain-extended modified polycarboxylate water reducer and a preparation method thereof are generated by radical polymerization of the following raw materials in parts by weight:
[0041] Bottom liquid: isopentenol polyoxyethylene ether: 350, deionized water: 270;
[0042] Oxidizing agent: peracetic acid: 4.2;
[0043] Solution A: Acrylic acid: 42, diphenylmethane diisocyanate: 6, deionized water: 48;
[0044] Solution B: mercaptoacetic acid: 2.0, sodium hypophosphite: 2.0, white block: 0.6, pentamethylene glycol: 5.0, deionized water: 110;
[0045] Ammonia: 15.
[0046]The isocyanate chain extension modified polycarboxylate water reducer and the preparation method thereof comprise the following steps: 345g of methallyl polyoxyethylene ether and 270g of deionized water are dropped into the bottom of the reaction vessel and mixed uniformly; peracetic acid is selected as the oxidizing agent , hang white block as reducing agent, mercaptoacetic acid and sodi...
Embodiment 3
[0048] An isocyanate chain-extended modified polycarboxylate water reducer and a preparation method thereof are generated by radical polymerization of the following raw materials in parts by weight:
[0049] Bottom liquid: modified isopentenol polyoxyethylene ether: 350, deionized water: 180;
[0050] Oxidizing agent: ammonium persulfate: 5.8;
[0051] Solution A: Acrylic acid: 40.25, 1,6-hexamethylene diisocyanate: 5.75, deionized water: 46;
[0052] Solution B: mercaptoethanol: 3.0, sodium hypophosphite: 1.0, sodium dithionite: 0.6, acetaminophen: 4.0, deionized water: 110;
[0053] Ammonia: 10.
[0054] The isocyanate chain extension modified polycarboxylate water reducer and its preparation method comprise the following steps: 360g of modified isopentenol polyoxyethylene ether and 180g of deionized water are dropped into the bottom of the reaction vessel, and mixed uniformly; ammonium persulfate is selected as Oxidant, sodium dithionite as reducing agent, mercaptoethano...
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