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Gypsum used for modified jewelry casting and preparation method of gypsum
The invention relates to gypsum powder used for modified jewelry casting and a preparation method of the gypsum, and belongs to the technical field of gypsum casting. The gypsum is prepared from the following raw materials in parts by weight: 13-18 parts of a cementing material, 78-81 parts of a fireproof material, 2-3 parts of a defoaming agent, 1-2 parts of an anti-cracking agent, 1-2 parts of a retarder, 12-14 parts of modified cyanate ester resin, 4-6 parts of nano silicon dioxide and 4-6 parts of nano aluminum oxide. The preparation method comprises the following steps: adding the fireproof material into mixing equipment, and stirring for 6-8 minutes; adding the cementing material, and performing mixed stirring for 10 minutes; adding the defoaming agent and the anti-cracking agent, and performing mixed stirring for 10-15 minutes; adding the nano silicon dioxide, the nano aluminum oxide and an additive, then stirring for 5-10 minutes, then adding the retarder, and stirring uniformly. The gypsum powder used for modified jewelry casting, provided by the invention, not only has a relatively long effective stirring time but also has a suitable initial setting time and a suitable final setting time, the product is high in strength and wide in adaptive range and is high-temperature-resistant, and the preparation process is simple, is easy to operate and is beneficial for industrial production.
Gypsum used for modified jewelry casting and preparation method of gypsum
The invention relates to gypsum powder used for modified jewelry casting and a preparation method of the gypsum, and belongs to the technical field of gypsum casting. The gypsum is prepared from the following raw materials in parts by weight: 13-18 parts of a cementing material, 78-81 parts of a fireproof material, 2-3 parts of a defoaming agent, 1-2 parts of an anti-cracking agent, 1-2 parts of a retarder, 12-14 parts of modified cyanate ester resin, 4-6 parts of nano silicon dioxide and 4-6 parts of nano aluminum oxide. The preparation method comprises the following steps: adding the fireproof material into mixing equipment, and stirring for 6-8 minutes; adding the cementing material, and performing mixed stirring for 10 minutes; adding the defoaming agent and the anti-cracking agent, and performing mixed stirring for 10-15 minutes; adding the nano silicon dioxide, the nano aluminum oxide and an additive, then stirring for 5-10 minutes, then adding the retarder, and stirring uniformly. The gypsum powder used for modified jewelry casting, provided by the invention, not only has a relatively long effective stirring time but also has a suitable initial setting time and a suitable final setting time, the product is high in strength and wide in adaptive range and is high-temperature-resistant, and the preparation process is simple, is easy to operate and is beneficial for industrial production.
Gypsum used for modified jewelry casting and preparation method of gypsum
SONG YUZHU (author) / GAO SHIHAO (author) / ZHAO JINCHAO (author)
2015-12-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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