Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of powder modified protein gypsum retarder

A gypsum retarder and powder modification technology, applied in the field of building materials, can solve the problems of short initial and final setting time interval, low retarding efficiency, and reduced strength of gypsum retarder, and achieve the initial setting time and final setting time. The effect of prolonging the time interval, delaying the coagulation time, and reducing the concentrated heat

Active Publication Date: 2022-05-10
JIANGSU NIGAO SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Gypsum retarders are mainly divided into organic acids and their soluble salts, alkaline phosphate, proteins, organic acids and their soluble salts retarders mainly include citric acid, sodium citrate, tartaric acid, potassium tartrate, etc. The best effect is citric acid and its salt, but it will significantly reduce the strength of building gypsum. The larger the dosage, the more obvious the strength reduction
Phosphate retarders mainly include sodium hexametaphosphate, sodium polyphosphate, sodium tripolyphosphate, sodium pyrophosphate, etc., but their retarding efficiency is low, the dosage is high, and the impact on strength is also great
Protein retarders include bone glue, peptone, etc., which have relatively little effect on the crystal morphology of dihydrate gypsum, and the loss of strength is small, but their cost is high, the time interval between initial and final setting is short, and the retarding effect in alkaline environment Difference
[0004] The patent with the publication number of CN 106495517 A discloses a method for utilizing livestock and poultry slaughter waste, using the livestock and poultry slaughter waste as a raw material, and preparing a gypsum retarder through physical purification, acidolysis, and trisodium phosphate modification. The acid hydrolyzed liquid protein gypsum retarder is obtained, the initial and final setting time interval of the gypsum retarder is short, and the retarding effect of the alkaline environment is not reflected

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 preparation method of powder modified protein gypsum retarder
  • A kind of preparation method of powder modified protein gypsum retarder
  • A kind of preparation method of powder modified protein gypsum retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of powder modified opal plaster retarder, comprising the following steps:

[0024] a. Acid hydrolysis: put 30 parts by mass of protein material, 10 parts by mass of 31% hydrochloric acid and 40 parts by mass of water into the reactor, and carry out the hydrolysis reaction for 3-4 hours at a temperature of 85-90° C. to obtain solid Acid hydrolyzed protein solution with a content of 35-40%;

[0025] b. Modification: Leave 60 mass parts of the acid hydrolyzed protein solution obtained in step a in the reactor, then add 25 mass parts of diethylenetriaminepentamethylene phosphonic acid, 1 mass part of styrenesulfonic acid, 4 mass parts Parts of hydroxyethyl acrylate are kept at a temperature of 55-60°C for 1-1.5 hours to obtain a mixture;

[0026] c. Neutralization: cool down the mixture obtained in step b to 35-45°C, then add 3 parts by mass of potassium tartrate and 5 parts by mass of calcium hydroxide, and neutralize the pH value to 7-9 to obtain mod...

Embodiment 2

[0035] A preparation method of powder modified opal plaster retarder, comprising the following steps:

[0036] a. Acid hydrolysis: put 35 parts by mass of protein material, 18 parts by mass of 31% hydrochloric acid and 45 parts by mass of water into the reactor, and carry out the hydrolysis reaction at a temperature of 85-90° C. for 3-4 hours to obtain solid Acid hydrolyzed protein solution with a content of 35-40%;

[0037] b. Modification: Leave 60 mass parts of the acid hydrolyzed protein solution obtained in step a in the reactor, then add 25 mass parts of diethylenetriaminepentamethylene phosphonic acid, 1 mass part of styrenesulfonic acid, 4 mass parts Parts of hydroxyethyl acrylate are kept at a temperature of 55-60°C for 1-1.5 hours to obtain a mixture;

[0038] c. Neutralization: cool down the mixture obtained in step b to 35-45°C, then add 3 parts by mass of potassium tartrate and 5 parts by mass of calcium hydroxide, and neutralize the pH value to 7-9 to obtain mod...

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

No PUM Login to View More

Abstract

The invention relates to the field of building materials, in particular to a method for preparing a powder-modified opal plaster retarder for gypsum building materials, including acid hydrolyzed protein, organic phosphonic acid, styrene sulfonic acid and hydroxyethyl acrylate modification , Potassium tartrate and alkaline substances neutralization, perlite adsorption, drying, milling and other steps. The powder modified protein gypsum retarder prepared by the present invention has high effective protein component content, good retarding effect, low dosage can significantly delay the setting time of gypsum, and has good retarding effect in neutral and alkaline environments. Coagulation effect; can be widely used in dry powder gypsum products such as gypsum self-leveling, plastering gypsum, etc., effectively prolonging the interval between initial setting time and final setting time, reducing the concentrated heat in the gypsum hardening process; powder modified protein gypsum retarder of the present invention The preparation method has no waste water, waste gas and solid waste in the whole process, and the whole process can be operated in line.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a powder-modified protein gypsum retarder for gypsum building materials. Background technique [0002] Gypsum is a green building material with excellent performance and can be recycled. my country's natural gypsum reserves rank first in the world. At the same time, the comprehensive utilization rate of industrial by-products is low. The cumulative stock of industrial by-product gypsum has exceeded 300 million tons. Gypsum can be widely used In plastering gypsum, self-leveling gypsum, gypsum board, GRC gypsum components and other products. Gypsum sets and hardens quickly, and requires prolonged operation time before it can be used. Gypsum retarder is an indispensable part of gypsum building materials. [0003] Gypsum retarders are mainly divided into organic acids and their soluble salts, alkaline phosphate, proteins, organic acids and their soluble salts ...

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): C04B24/16C04B14/48C04B103/22
CPCC04B24/003C04B40/0046C04B40/0042C04B2103/22C04B14/18
Inventor 吴开胜张朝辉王道正钱中秋徐建军
Owner JIANGSU NIGAO SCI & TECH