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Calcium sulfate retarder and preparation method thereof

A gypsum retarder and protein technology, which is applied in the field of gypsum building materials, can solve the problems of unsatisfactory loss of strength of gypsum products, and achieve the effects of easy acquisition, small strength loss and long setting time

Active Publication Date: 2015-07-15
SUZHOU XINGBANG CHEM BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Commonly used gypsum retarders such as citric acid, tartaric acid, phosphate, etc. can achieve a certain setting time adjustment in terms of retarding effect. In recent years, bone glue and natural protein products have also appeared, but only involve the physical properties of simple components. Composite, in terms of comprehensive application performance of gypsum products, especially in terms of strength loss of gypsum products, it is still unsatisfactory

Method used

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  • Calcium sulfate retarder and preparation method thereof
  • Calcium sulfate retarder and preparation method thereof
  • Calcium sulfate retarder and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] This embodiment discloses a gypsum retarder, the mass percentage of raw materials is: 20% of animal keratin, 3.44% of sodium hydroxide, 7.5% of sodium dihydrogen phosphate, 3.75% of methyl acrylate, 0.01% of phenylethyl acetate , sodium benzoate 0.05% and diisopropylethylamine 0.2% and water 65%.

[0035] This embodiment also discloses the preparation method of this gypsum retarder. Add animal keratin and deionized water into a 500ml three-necked flask equipped with a stirrer and a thermometer, stir and heat up to 60°C, then add sodium hydroxide to adjust The pH value is 8.5, heat preservation and hydrolysis for 3 hours; then sequentially add sodium dihydrogen phosphate, methyl acrylate, sodium benzoate, diisopropylethylamine, and then add sodium hydroxide to adjust the pH value to 7, heat up to 90°C, and heat preservation reaction 3h; After the heat preservation is completed, add phenylethyl acetate, cool to below 40°C, and stir to obtain the gypsum retarder.

Embodiment 2

[0037] This embodiment discloses a gypsum retarder, the mass percentage of raw materials is: industrial gelatin 30%, potassium hydroxide 3.15%, sodium dihydrogen phosphate 7.5%, ethylenediaminetetraacetic acid 7.5%, phenylethyl acetate 0.05% %, sodium benzoate 0.1%, diisopropylethylamine 0.2% and water 51.5%.

[0038] This example also discloses the preparation method of this gypsum retarder. Add industrial gelatin and deionized water into a 500ml three-necked flask equipped with a stirrer and a thermometer, stir and heat up to 80°C, then add potassium hydroxide to adjust the pH The value is 8, heat preservation and hydrolysis for 4 hours; then sequentially add sodium dihydrogen phosphate, ethylenediaminetetraacetic acid, sodium benzoate, diisopropylethylamine, and potassium hydroxide to adjust the pH value to 10, and at the same time raise the temperature to 60°C, Insulate for 3 hours; add phenylethyl acetate after the end of the insulation, cool to below 40°C, and stir to ob...

Embodiment 3

[0040] This embodiment discloses a gypsum retarder, the mass percentage of raw materials is: 25% zein, 4% calcium hydroxide, 7.5% sodium dihydrogen phosphate, 7.5% maleic anhydride, 0.05% phenylethyl acetate, Sodium Benzoate 0.1% and Diisopropylethylamine 0.8% and Water 54.15%.

[0041] This example also discloses the preparation method of this gypsum retarder. Add zein and deionized water into a 500ml three-neck flask equipped with a stirrer and a thermometer, stir and heat up to 65°C, then add

[0042] Potassium hydroxide, adjust the pH value to 8.5, heat preservation and hydrolysis for 3 hours; then add sodium dihydrogen phosphate, maleic anhydride, sodium benzoate, diisopropylethylamine in turn, then add calcium hydroxide, adjust the pH value to 7, and raise the temperature at the same time Heat to 85°C and keep warm for 4.5 hours; after the keep warm, add phenylethyl acetate, cool to below 40°C and stir to get gypsum retarder.

[0043] Embodiment 4-10 is shown in the fol...

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Abstract

The invention relates to the field of gypsum building materials, and discloses a calcium sulfate retarder. The calcium sulfate retarder is prepared from the following components in percentage by mass: 20-30 percent of a protein component raw material, 3-5 percent of an alkaline substance, 7.5-15 percent of sodium dihydrogen phosphate, 3.75-7.5 percent of organic acid, anhydride or ester, 0.01-0.05 percent of phenethyl acetate, 0.05-0.1 percent of sodium benzoate, 0.2-0.8 percent of diisopropylethylamine and 50-65 percent of water. The invention further discloses a method for preparing the calcium sulfate retarder. The calcium sulfate retarder is used for regulating the coagulation of building gypsum, and has the characteristics of low cost, good delayed coagulation effect and small strength loss.

Description

technical field [0001] The invention relates to the field of gypsum building materials, in particular to a gypsum retarder and a preparation method thereof. Background technique [0002] As a building material, gypsum has many excellent characteristics, such as light weight, good thermal insulation performance and sound absorption performance of hardened body, slight volume expansion when hardened, smooth surface of hardened body, no cracking when dry, good decoration, good processability, Low production energy consumption and other advantages. [0003] As an excellent green building material, gypsum is widely used in products such as plaster plaster, plastering gypsum, gypsum products and other decorative parts. In practical application, the setting time of gypsum material is short after mixing with water, and it can lose fluidity in a few minutes, which cannot meet the requirements of normal construction. Usually, retarders are added to the gypsum system to adjust the se...

Claims

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Application Information

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IPC IPC(8): C04B24/14
Inventor 余振新毛荣良陶鹃陈怡许如源
Owner SUZHOU XINGBANG CHEM BUILDING MATERIALS
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