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Polymeric amino acid gypsum retarder

A technology for polymerizing amino acid and gypsum retarder, which is applied in the field of polymerized amino acid gypsum retarder, and can solve problems such as the greater impact on the strength of gypsum materials

Active Publication Date: 2019-06-11
北京博润佳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcomings in the prior art, and propose a polymeric amino acid gypsum retarder, so as to effectively solve the defects in the prior art that have a great influence on the strength of gypsum materials

Method used

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  • Polymeric amino acid gypsum retarder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 30kg of glutamic acid, 30kg of lysine, and 40kg of aspartic acid, react at 190°C for 4h, cool to 120°C, add 100kg of 10% potassium hydroxide aqueous solution to the system and continue to react for 1h, and the material is dried and pulverized Afterwards, the product 1 was obtained, and the average molecular weight was determined to be 2000.

Embodiment 2

[0020] Weigh 20kg glutamic acid, 20kg lysine, 60kg aspartic acid, react at 260°C for 40min, cool to 60°C, add 10% sodium hydroxide aqueous solution to the system and continue to react for 2h, after drying The product 2 was obtained after pulverization, and the measured average molecular weight was 6000.

Embodiment 3

[0022] Weigh 10kg of glutamic acid, 70kg of lysine, and 20kg of aspartic acid, react at 240°C for 30min, add 120kg of 10% sodium hydroxide solution after cooling to 120°C, and continue to react for 2h, and obtain product 3 after drying and crushing. The average molecular weight was measured to be 3000.

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Abstract

The invention discloses a polymeric amino acid gypsum retarder. The polymeric amino acid gypsum retarder is prepared from the following components in percentage by mass: 70-95% of polymerized amino acid and 5-30% of an excitant. The preparation method comprises the following steps: amino acid monomers containing carboxyl and amide groups are adopted for obtaining polymerization amino acid througha solid-phase polymerization method, then an alkali metal hydroxide is added for a reaction, and the obtained material is dried and crushed to obtain the polymeric amino acid gypsum retarder. The polymeric amino acid gypsum retarder prepared by the preparation method disclosed by the invention is non-toxic and harmless to the environment, does not generate any pollution, and has little negative influence on the strength of gypsum.

Description

technical field [0001] The invention relates to the field of gypsum-based building materials, in particular to a polymeric amino acid gypsum retarder. Background technique [0002] Gypsum is an ancient building material and belongs to one of the three traditional inorganic cementitious materials. It is often used for plaster plaster, gypsum mortar, gypsum board, gypsum block and other decorative parts. Gypsum materials and gypsum products mainly have the characteristics of low production energy consumption, good heat preservation and energy saving benefits, heat insulation and sound insulation, fire resistance, etc., and gypsum-based building materials have micro-expansion characteristics, which makes hollowing and cracking less likely to occur. Gypsum building material has become an energy-saving green building material that is respected and developed internationally. [0003] The setting and hardening speed of building gypsum is very fast, and the initial setting time is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28C04B103/22
Inventor 王建荣吴梓红王小梅董慧艳姚超超许小草
Owner 北京博润佳科技有限公司
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