Preparation method of light plastering gypsum defoaming agent
A technology for plastering gypsum and its production method, which is applied in the field of gypsum defoamers to achieve the effects of stable use, improved defoaming ability, and easy mass production
Active Publication Date: 2022-04-12
徐州虚竹建材科技有限公司
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[0004] The object of the present invention is to provide a kind of preparation method of light-weight plastering gypsum defoamer, to solve the problem of improving the preparation reaction efficiency of gypsum defoamer proposed in the above-mentioned background technology under mild and easy-to-process conditions
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0031] see Figure 1-5 , an embodiment provided by the present invention: a method for making a light-weight plastering gypsum defoamer, comprising the following steps: Step 1-1, firstly preparing low-hydrogen silicone oil, adding hexacarbamide respectively in the reaction vessel Cyclodisiloxane, octamethylcyclotetrasiloxane, methylhydrogen silicone oil and concentrated sulfuric acid 2%, stirred at 60°C for 6h, and the obtained solution was cooled naturally; step 1-2, after cooling Add sodium bicarbonate to the liquid to neutralize the pH value to 6.5; step 1-3, filter the liquid, and take out the solid sodium carbonate generated during the reaction; step 1-4, return...
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The invention discloses a preparation method of a light plastering gypsum defoaming agent, relates to the technical field of gypsum defoaming agents, and aims to solve the problem that the existing gypsum defoaming agent cannot improve the preparation reaction efficiency under mild and easy-to-process conditions. The preparation method comprises the following steps: 1-1, preparing low-hydrogen-content silicone oil, namely respectively adding hexamethylcyclodisiloxane, octamethylcyclotetrasiloxane, methyl hydrogen-containing silicone oil and 2% of concentrated sulfuric acid into a reaction container, and stirring; step 1-2, neutralizing the pH value; step 1-3, filtering the liquid, and taking out a sodium carbonate solid generated in the reaction process; and step 1-4, returning the solution to the reaction kettle again, continuously stirring, condensing and refluxing to obtain the low-hydrogen silicone oil. 2-1, preparing modified polyether, namely adding low-hydrogen silicone oil, polyether and trifluoroacetic acid into the reaction container, and stirring; 2-2, obtaining modified polyether after the heat preservation time is up; step 3-1, finally adding low-hydrogen silicone oil, modified polyether and chloroplatinic acid into the reaction container; and step 3-2, adding silicon dioxide to obtain the gypsum defoaming agent.
Description
technical field [0001] The invention relates to the technical field of gypsum defoamers, in particular to a method for preparing a lightweight plastered gypsum defoamer. Background technique [0002] When the construction industry uses various building materials, it also adds a lot of auxiliary additives, such as cement water reducer, gypsum, cement mortar additives, etc. When these auxiliary additives are used, there may be foam problems, which directly affect the use of building materials. For example, gypsum foam affects the use of gypsum, so a defoamer is needed. Gypsum defoamer is a defoamer specially designed for gypsum. Composed of polyether, esterified and high-carbon alcohols, it is made by special technology. It does not float oil, does not suspend, and is suitable for anion and cation systems. it is good. [0003] However, in the preparation of gypsum defoamer, the polyether-modified polysiloxane copolymer used in gypsum defoamer must have certain hydrophobicity...
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Login to View More IPC IPC(8): C04B24/42C08G77/46C04B103/50
Inventor 马彦波杨公奉
Owner 徐州虚竹建材科技有限公司