A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Surface modification enhanced gypsum powder as well as preparation method and application thereof
The invention discloses surface modification enhanced gypsum powder which is mainly prepared from the following raw materials in parts by weight: 100 parts of alpha-gypsum, 35-40 parts of fine sand, 2-3 parts of redispersible latex powder, 1-3 parts of cellulose ether, 2-4 parts of a coupling agent, 0.1-0.3 part of a water reducing agent, 0.3-0.9 part of a retarder and 0.2-0.5 part of an enhancer. Preferably, the redispersible latex powder is a copolymer of vinyl acetate and ethylene, and is prepared by the steps of carrying out emulsion polymerization on vinyl acetate and ethylene monomers under the action of polyvinyl alcohol serving as protective glue to obtain a parent emulsion, and then carrying out spray drying to obtain the redispersible latex powder. Preferably, the cellulose ether is any one of carboxymethyl cellulose ether, sulfonic acid ethyl cellulose ether, carboxymethyl hydroxyethyl cellulose ether, methyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and the like. The surface modification enhanced gypsum powder provided by the invention has the advantages of short initial setting and setting time and high strength.
本发明公开了一种表面改性增强的石膏粉，主要由以下重量份原料制备而成：α‑石膏100份，细砂35～40份，可再分散性乳胶粉2～3份，纤维素醚1～3份，偶联剂2～4份，减水剂0.1～0.3份，缓凝剂0.3～0.9份，增强剂0.2～0.5份。优选的，所述可再分散性乳胶粉为醋酸乙烯酯和乙烯的共聚物，由以下方法制备而成：醋酸乙烯酯和乙烯单体在聚乙烯醇作保护胶的作用下，通过乳液聚合得到母体乳液，再经喷雾干燥制得。优选的，所述纤维素醚为羧甲基纤维素醚、磺酸乙基纤维素醚、羧甲基羟乙基纤维素醚、甲基纤维素醚、羟乙基甲基纤维素醚、羟丙基甲基纤维素醚等中的任意一种。本发明提供的一种表面改性增强的石膏粉，具有初凝和凝结时间短，强度高的优点。
Surface modification enhanced gypsum powder as well as preparation method and application thereof
The invention discloses surface modification enhanced gypsum powder which is mainly prepared from the following raw materials in parts by weight: 100 parts of alpha-gypsum, 35-40 parts of fine sand, 2-3 parts of redispersible latex powder, 1-3 parts of cellulose ether, 2-4 parts of a coupling agent, 0.1-0.3 part of a water reducing agent, 0.3-0.9 part of a retarder and 0.2-0.5 part of an enhancer. Preferably, the redispersible latex powder is a copolymer of vinyl acetate and ethylene, and is prepared by the steps of carrying out emulsion polymerization on vinyl acetate and ethylene monomers under the action of polyvinyl alcohol serving as protective glue to obtain a parent emulsion, and then carrying out spray drying to obtain the redispersible latex powder. Preferably, the cellulose ether is any one of carboxymethyl cellulose ether, sulfonic acid ethyl cellulose ether, carboxymethyl hydroxyethyl cellulose ether, methyl cellulose ether, hydroxyethyl methyl cellulose ether, hydroxypropyl methyl cellulose ether and the like. The surface modification enhanced gypsum powder provided by the invention has the advantages of short initial setting and setting time and high strength.
本发明公开了一种表面改性增强的石膏粉，主要由以下重量份原料制备而成：α‑石膏100份，细砂35～40份，可再分散性乳胶粉2～3份，纤维素醚1～3份，偶联剂2～4份，减水剂0.1～0.3份，缓凝剂0.3～0.9份，增强剂0.2～0.5份。优选的，所述可再分散性乳胶粉为醋酸乙烯酯和乙烯的共聚物，由以下方法制备而成：醋酸乙烯酯和乙烯单体在聚乙烯醇作保护胶的作用下，通过乳液聚合得到母体乳液，再经喷雾干燥制得。优选的，所述纤维素醚为羧甲基纤维素醚、磺酸乙基纤维素醚、羧甲基羟乙基纤维素醚、甲基纤维素醚、羟乙基甲基纤维素醚、羟丙基甲基纤维素醚等中的任意一种。本发明提供的一种表面改性增强的石膏粉，具有初凝和凝结时间短，强度高的优点。
Surface modification enhanced gypsum powder as well as preparation method and application thereof
一种表面改性增强的石膏粉及其制备方法和应用
NIU ZHUNYU (author)
2022-01-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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