Flexible acrylic acid emulsion
An acrylic emulsion and flexible technology, applied in the field of flexible acrylic emulsion, can solve the problem of mixing of materials that cannot be electrically connected, and achieve the effects of high flexibility retention, reducing the influence of electrical properties, and optimizing chemical stability.
Inactive Publication Date: 2005-07-06
江苏日出化工有限公司
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AI Technical Summary
Problems solved by technology
Therefore, the current acrylic emulsion system cannot be mixed with cement, a substance with a large amount of charge
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] Take each component by weight percentage (%) as follows:
[0023] Butyl acrylate 35, styrene 15, methacrylic acid 0.8, acrylamide 1, ethyl acetoacetate 2, sodium dodecylbenzenesulfonate 1.8, ammonium persulfate 0.5, sodium dithionite 0.4, ammonia water 1.5, Water 42, using low-temperature oxidation-reduction reaction, the reaction temperature is 63-67°C, the oxidizing agent and the reducing agent are added dropwise at the same time; when the temperature rises to 75°C, the monomer is added dropwise, and the temperature is kept at 63-67°C, and the dropwise addition time is 3.5 hours , keep warm for 30 minutes, then stir for 15 minutes, then cool to 40°C, filter and discharge.
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A flexible acrylic emulsion, which contains monomers with unsaturated bonds, emulsifiers, initiators and water in its formula. In addition to components such as acrylic acid and its esters, methacrylic acid and its esters, and styrene, the monomers also contain Acetoacetate ethyl methacrylate has a content of 1.01-3.03% by weight in the total amount of the emulsion. The present invention uses ethyl methacrylate acetoacetate as the cross-linking agent, because the cross-linking agent generates short-term polarity through the vibration of the dipole moment to produce cross-linking, which is different from other charged ionic cross-linking agents, so the preparation The resulting emulsion has excellent chemical stability and can be polymerized with cement as a waterproof layer and tile putty for buildings with anti-crack and anti-alkali properties. It solves the problem that the current acrylic emulsion will break when it encounters a strong electrolyte and cannot be compatible with cement. Mixed technical issues.
Description
technical field [0001] The invention relates to an acrylic emulsion, in particular to a flexible acrylic emulsion used for preparing cement polymer as a waterproof layer of buildings with anti-cracking and anti-alkali properties, and tile putty. Background technique [0002] At present, the acrylic emulsion is composed of the following parts: A. Monomers with unsaturated bonds, such as acrylic acid and its esters, methacrylic acid and its esters, and styrene, which form polymers through polymerization to form the main body of the acrylic emulsion. Among them, acrylic acid and methacrylic acid It is charged or has strong polarity, and is used as a cross-linking monomer, a stabilizing monomer, and an adhesion promoting monomer. B. Emulsifiers, segregated sub-emulsifiers and non-ionic emulsifiers, form micelles in water, provide polymerization sites, and provide emulsion stability through electrical or hydration. C. Water-soluble initiators, through high ...
Claims
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IPC IPC(8): C08F2/22C08F220/10
Inventor 周松奎邱敬龙
Owner 江苏日出化工有限公司
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