Lacquer emulsion and preparation method thereof
A real stone paint and emulsion technology, applied in the field of real stone paint emulsion and its preparation, can solve the problems of water absorption swelling, blooming, whitening and other problems of paint film, and achieve the effect of high paint film hardness, low film forming temperature and good water resistance
Inactive Publication Date: 2012-07-04
上海奇想青晨新材料科技股份有限公司
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Problems solved by technology
These non-polymerizable emulsifiers form a non-chemically bonded emulsified layer on the surface of the paint film. Once exposed to water or damp, the paint film will absorb water and swell, causing "blooming" and "whitening". It greatly reduces the appearance of the appearance, and greatly reduces the physical properties of the real stone paint sprayed on the exterior of the building.
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[0039] A. First, add 0.2 parts by weight of compound emulsifier and 12 parts by weight of deionized water into the polymerization reactor, stir and heat up;
[0040] B. 35 parts by weight of deionized water, 1.8 parts by weight of composite emulsifier, 18 parts by weight of hard monomer (15 parts by weight of styrene and 3 parts by weight of methyl methacrylate compound) are added in the pre-emulsification kettle, Under the condition of constant speed (720 revs / min), after stirring for 80 minutes, a pre-emulsion was obtained, and 5.48 parts by weight thereof were weighed as the bottom seed reaction liquid for subsequent use;
[0041] C. Raise the temperature of the polymerization reactor in step A to 75-80°C, drop into 5.48 parts by weight of the bottom seed reaction solution in step B, then add 0.2 parts by weight of the bottom initiator to react for 80-100 minutes, and pour into the polymerization reactor Continue to add 8 parts by weight of deionized water, slowly lower the...
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The invention relates to a lacquer emulsion which is prepared by polymerizing the following raw materials: a hard monomer, a soft monomer, a functional monomer, a composite emulsifying agent, organic silicon, an initiator, a pH regulating agent and deionized water. The invention also provides a preparation method of the lacquer emulsion. Compared with the prior art, the lacquer emulsion has the advantages of good water tolerance, high paint film hardness, low film-forming temperature and the like. The reasons are as follows: the emulsion prepared by using the method is higher in solid content, and the highest solid content can reach 56%; at least one reaction-type emulsifying agent is adopted, thus the stability of the emulsion is improved, and the water tolerance of a latex film is improved; and proper monomers and monomer proportion are selected, and the glass transition temperature and lowest film-forming temperature of the polymer are reduced, so that the formed paint film is higher in hardness and lower in film-forming temperature.
Description
technical field [0001] The invention relates to architectural coatings, in particular to a real stone paint emulsion and a preparation method thereof. Background technique [0002] Real stone paint, also known as anti-stone paint, is mainly made of natural stone powder of various colors and polymer emulsion. It is sprayed on the exterior wall of the building, and the decorative effect is similar to marble and granite. It is an ideal material to replace the natural stone decorative surface. [0003] However, the real stone paint currently used generally has the disadvantage of poor water resistance, and the coating will turn white and become loose every time it rains. This is due to the moisture absorption of the coating. The main reason for the formulation is that the selected styrene-acrylic emulsion needs to be added with an emulsifier during synthesis. These non-polymerizable emulsifiers form a non-chemically bonded emulsified layer on the surface of the paint film. Onc...
Claims
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Login to View More IPC IPC(8): C08F220/18C08F212/08C08F220/14C08F2/30C08F2/26C09D133/08C09D7/12
Inventor 陆超
Owner 上海奇想青晨新材料科技股份有限公司