Composite gypsum retarder and preparation method thereof

A gypsum retarder and composite technology, applied in the field of gypsum building materials, can solve the problems of large dosage, difficult control of retarding time, unsatisfactory strength loss, etc., and achieve small strength loss and long retarding time Effect

Active Publication Date: 2022-06-24
SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, bone glue and natural protein products have also appeared, but they only involve the physical compounding of simple components, there are large dosages, and the retarding time is not easy to control. In terms of comprehensive application performance of gypsum products, especially the strength loss of gypsum products unsatisfactory

Method used

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  • Composite gypsum retarder and preparation method thereof
  • Composite gypsum retarder and preparation method thereof
  • Composite gypsum retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] This embodiment discloses a composite gypsum retarder, which is prepared according to mass percentage from the following components: 28 parts of itaconic acid-p-aminostyrene phosphoric acid copolymer, 15 parts of magnesium nitrate, hydroxyethylidene diphosphine 15 parts of disodium acid, 20 parts of sodium sulfamate.

[0035] In this embodiment, the preparation method of above-mentioned itaconic acid-p-aminostyrene phosphoric acid copolymer, comprises the following steps:

[0036] 1) Add itaconic acid, p-aminostyrene phosphoric acid, deionized water and catalyst to the reactor in turn, heat in a constant temperature water bath, stir to dissolve itaconic acid and p-aminostyrene phosphoric acid, add sodium hydroxide The pH value of the solution was kept at 8.5 to obtain a reaction solution;

[0037] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant speed, heat to reflux and mechanically sti...

Embodiment 2

[0047] This embodiment discloses a composite gypsum retarder, which is prepared according to the mass percentage from the following components: 50 parts of itaconic acid-p-aminostyrene phosphoric acid copolymer, 15 parts of magnesium ammonium phosphate, hydroxyethylidene 13 parts of tetrasodium diphosphonate and 25 parts of sodium m-sulfanilate.

[0048] In this embodiment, the preparation method of above-mentioned itaconic acid-p-aminostyrene phosphoric acid copolymer, comprises the following steps:

[0049] 1) Add itaconic acid, p-aminostyrene phosphoric acid, deionized water and catalyst to the reactor in turn, heat in a constant temperature water bath, stir to dissolve itaconic acid and p-aminostyrene phosphoric acid, add sodium hydroxide The pH value of the solution was kept at 8.5 to obtain a reaction solution;

[0050] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant speed, heat to reflu...

Embodiment 3

[0060] This embodiment discloses a composite type fluoride removing agent, which is prepared from the following components according to the mass percentage: 30 parts of itaconic acid-p-aminostyrene phosphoric acid copolymer, 25 parts of magnesium tartrate, 2-phosphonic acid butane -20 parts of tetrasodium 1,2,4-tricarboxylate and 5 parts of potassium sulfamate.

[0061] In this embodiment, the preparation method of above-mentioned itaconic acid-p-aminostyrene phosphoric acid copolymer, comprises the following steps:

[0062] 1) Add itaconic acid, p-aminostyrene phosphoric acid, deionized water and catalyst to the reactor in turn, heat in a constant temperature water bath, stir to dissolve itaconic acid and p-aminostyrene phosphoric acid, add sodium hydroxide The pH value of the solution was kept at 8.5 to obtain a reaction solution;

[0063] 2) Under a nitrogen atmosphere, maintain the temperature at 75°C, add the initiator dropwise to the reaction solution at a constant spee...

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Abstract

The invention belongs to the field of gypsum building materials, and relates to a composite gypsum retarder, which is prepared from the following raw materials in parts by weight: 30 to 50 parts of itaconic acid-p-amino styrene phosphoric acid copolymer, 15 to 25 parts of magnesium salt, 13 to 20 parts of organic acid salt and 5 to 25 parts of sulfamate. The invention also discloses a preparation method of the composite gypsum retarder. Compared with the prior art, the invention has the following advantages: from the two macroscopic indexes of setting time and strength loss, compared with other inorganic salt retarders, the invention has the advantages of long retarding time and small strength loss; the time of the retarder is not suddenly changed due to the change of the mixing amount, the mixing amount and the retarding time are in a linear relationship, and the setting time of gypsum can be randomly adjusted according to the operation time.

Description

technical field [0001] The invention belongs to the field of gypsum building materials, in particular to a composite gypsum retarder and a preparation method thereof. Background technique [0002] As an excellent green building material, gypsum is widely used in plastering gypsum, plastering gypsum, gypsum products and other decorative parts. In practical applications, the setting time of the gypsum material after mixing with water is short, and the fluidity can be lost within a few minutes, which cannot meet the requirements of normal construction. Gypsum-based products can only have real use value by adding a retarder to transform gypsum-based products, so gypsum-based retarders are of great significance to the application of gypsum-based building materials. [0003] A suitable retarder can delay the initial setting time of the gypsum material to reach a suitable range, while maintaining the strength of the gypsum product. [0004] At present, there are three main types ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B103/22
CPCC04B40/0039C04B2103/22C04B24/28C04B24/003C04B24/16C04B22/085C04B22/16C04B24/04Y02W30/91
Inventor 田民格高德超马祥棣郏瑞花曾俊曾志农孟伟康田沛霖
Owner SCI GREEN SHANDONG ENVIRONMENT TECH CO LTD
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