Modified Mannich amide polycondensate cement grinding aid, and preparation method and application thereof
A technology of cement grinding aid and phenalkamine, which is applied in the field of cement grinding aid and modified phenalkamine polycondensate, can solve the problems of insignificant enhancement effect, poor adaptability of cement materials, low grinding aid efficiency, etc., and achieves optimized cement particles. Gradation, good grinding effect and cost saving effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0037] (1) Preparation of polycondensate: add 0.5 mol of phenol, 1.5 mol of 37wt% formaldehyde solution (representing the molar amount of formaldehyde, the same below) and 1 mol of ethylenediamine into the reaction kettle, mix well, and react at 100°C for 2 hours to obtain polycondensation thing;
[0038] (2) Modification of the polycondensate: reduce the temperature of the polycondensate prepared in step (1) to 60° C., feed 2 mol of ethylene oxide, then keep the temperature for 1 hour, add a certain amount of water, and adjust the solid content to 60%. The modified phenalkamine condensation polymer cement grinding aid can be obtained. After the GPC test, the weight average molecular weight M w =650.
Embodiment 2
[0040] (1) Preparation of polycondensate: add 0.5 mol of 4-methylphenol, 1.35 mol of 37wt% formaldehyde solution and 0.85 mol of diethylenetriamine into the reactor, mix well, and react at 100° C. for 2 hours to obtain polycondensate;
[0041] (2) Modification of the polycondensate: reduce the temperature of the polycondensate prepared in step (1) to 60° C., feed 2.55 mol of ethylene oxide, then keep the temperature for 1 hour, add a certain amount of water, and adjust the solid content to 70 % can get the modified phenalkamine condensation polymer cement grinding aid, tested by GPC, the weight average molecular weight M w =960.
Embodiment 3
[0043] (1) Preparation of polycondensate: add 0.5 mol of 3-ethylphenol, 1.15 mol of 37wt% formaldehyde solution and 0.75 mol of triethylenetetramine into the reactor, mix well, and react at 110° C. for 2 hours to obtain polycondensate;
[0044] (2) Modification of the polycondensate: reduce the temperature of the polycondensate prepared in step (1) to 70°C, feed 3mol of ethylene oxide, then keep the temperature for 1 hour, add a certain amount of water, and adjust the solid content to 80% The modified phenalkamine condensation polymer cement grinding aid can be obtained. After the GPC test, the weight average molecular weight M w =1260.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Compressive strength | aaaaa | aaaaa |
| Compressive strength | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More