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Preparation method of organosilicon waterproof agent for gypsum
Pending Publication Date: 2020-05-01
张得华
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Problems solved by technology
[0017] The technical problem to be solved by the present invention: Aiming at the problem of poor waterproof performance of existing gypsum building materials, a preparation method of organosilicon gypsum waterproofing agent is provided
Method used
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Embodiment 1
[0044] In parts by weight, weigh 30 parts of vinyltrimethoxysilane, 30 parts of vinyltriethoxysilane, 20 parts of acrylic acid, 20 parts of methyl methacrylate, 20 parts of ethyl methacrylate, 4 parts of ten Sodium dialkylbenzenesulfonate, 0.4 part of sodiumpersulfate, 60 parts of deionized water, sodium dodecylbenzenesulfonate was added into deionized water, stirred at 180r / min for 12min at normal temperature to obtain an emulsifier solution, and Add acrylic acid, methyl methacrylate, and ethyl methacrylate to 2 / 3 of the emulsifier solution, stir at 200r / min for 10min in a water bath at 40°C, keep warm to obtain a pre-emulsion, and emulsify the remaining 1 / 3 Slowly add the agent solution into the pre-emulsion at a rate of 30mL / min, and stir for 20min at a speed of 240r / min in a water bath at 40°C to obtain an emulsion. Vinyltrimethoxysilane, vinyltriethoxysilane Add sodiumpersulfate into the emulsion, stir at 300r / min for 2 hours in a water bath at 80°C to obtain a mixed em...
Embodiment 2
[0046] In parts by weight, weigh 35 parts of vinyltrimethoxysilane, 35 parts of vinyltriethoxysilane, 25 parts of acrylic acid, 22 parts of methyl methacrylate, 22 parts of ethyl methacrylate, 5 parts of ten Sodium dialkylbenzenesulfonate, 0.6 part of sodium persulfate, 70 parts of deionized water, sodium dodecylbenzenesulfonate was added into deionized water, and stirred at 180r / min for 14min at normal temperature to obtain an emulsifier solution. Add acrylic acid, methyl methacrylate, and ethyl methacrylate to 2 / 3 of the emulsifier solution, stir at 220r / min for 11min in a water bath at 50°C, keep warm to obtain a pre-emulsion, and emulsify the remaining 1 / 3 Slowly add the agent solution into the pre-emulsion at a rate of 35mL / min, and stir for 25min at a speed of 260r / min in a water bath at 50°C to obtain an emulsion. Vinyltrimethoxysilane, vinyltriethoxysilane Add sodium persulfate into the emulsion, stir for 3 hours at a speed of 325r / min in a water bath at 85°C to obtain...
Embodiment 3
[0048]In parts by weight, weigh 40 parts of vinyltrimethoxysilane, 40 parts of vinyltriethoxysilane, 30 parts of acrylic acid, 25 parts of methyl methacrylate, 25 parts of ethyl methacrylate, 6 parts of ten Sodium dialkylbenzenesulfonate, 0.8 part of sodium persulfate, 80 parts of deionized water, sodium dodecylbenzenesulfonate was added into deionized water, and stirred at 180r / min for 16min at normal temperature to obtain an emulsifier solution. Add acrylic acid, methyl methacrylate, and ethyl methacrylate to 2 / 3 of the emulsifier solution, stir at 240r / min for 12min in a water bath at 60°C, keep warm to obtain a pre-emulsion, and emulsify the remaining 1 / 3 Slowly add the agent solution into the pre-emulsion at a rate of 40mL / min, and stir for 30min at a speed of 280r / min in a water bath at 60°C to obtain an emulsion. Vinyltrimethoxysilane, vinyltriethoxysilane Add sodium persulfate into the emulsion, stir at 350r / min for 4 hours in a water bath at 90°C to obtain a mixed emu...
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Abstract
The invention relates to a preparation method of an organosilicon waterproof agent for gypsum, belonging to the technical field of gypsumwaterproofing agents. According to the invention, acrylic acid, methyl methacrylate and ethyl methacrylate are added to prepare the organosilicon waterproof agent for gypsum; acrylic acid, methyl methacrylate and ethyl methacrylate can form polyacrylate in an emulsion; polyacrylate is low in viscosity, can form a tough hydrophobic membrane through crosslinking, and has excellent waterproofness; polyacrylate particles are dispersed in water and are graduallyclose to each other when water molecules evaporate; when the temperature of the waterproof agent is higher than the lowest film forming temperature of the emulsion, the polyacrylate particles can deform when getting close to each other so as to fill in gaps among the particles; finally, a transparent film without pores is formed, and capillary pores of the gypsum are filled with the film, so the performance of a gypsum base material can be improved; and therefore, the waterproof performance of the gypsum can be effectively improved.
Description
technical field [0001] The invention relates to a preparation method of an organosilicon gypsum waterproofing agent, belonging to the technical field of gypsum waterproofing agents. Background technique [0002] Gypsum is a traditional inorganic cementitious material with a long history of use. Gypsum gelling materials in a broad sense refer to gypsum phases that have gelling characteristics after reacting with water, such as β hemihydrate gypsum, α hemihydrate gypsum, anhydrous gypsum, and can eventually form a hardened body, while gypsum gelling materials in a narrow sense refer to β hemihydrate gypsum, commonly known as construction gypsum. In today's society, gypsum cementitious materials are mainly used to produce building non-load-bearing wall materials and interior decoration materials, such as paper-faced gypsum boards, gypsum blocks, decorative gypsum boards, plastering gypsum and other building materials. Gypsumbuilding material products generally have excellent...
Claims
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Application Information
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