Common knowledge of coating: what factors should be paid attention to in the preparation of silicone acrylic emulsion exterior wall coating

Core tip: due to the outstanding advantages of the silicone acrylic latex coating are good weather resistance, water resistance, alkali resistance, acid rain resistance, pollution resistance, strong adhesion, small water absorption and permeability of the film, it is an environmental friendly building coating with high performance and high decoration Therefore, the composition of the coating also has corresponding requirements (1) The definition of color / base ratio for coating performance is not very accurate, and the pigment volume concentration should be used Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: due to the outstanding advantages of the silicone acrylic latex coating are good weather resistance, water resistance, alkali resistance, acid rain resistance, pollution resistance, strong adhesion, small water absorption and permeability of the coating, it is an environmental friendly building coating with high performance and high decoration Therefore, the composition of the coating also has corresponding requirements (1) The definition of the color / base ratio for coating performance is not very accurate It is more scientific to use PVC However, due to the simple and intuitive calculation, the color / base ratio is often used in the design of formula Internal use: face / base ratio (pigment, filler quality / emulsion solid mass) is 6/l ~ 1/1 For external use: face / base ratio (pigment, filler quality / emulsion solid mass) is 4/1 ~ 1/1 (2) The best choice for white pigment is rutile titanium dioxide, which accounts for more than 20% of the total amount of coating It is not suitable to use anatase titanium dioxide, lithopone, etc (3) It is better to use chemical stable fillers, such as quartz sand (powder), precipitated barium sulfate, etc., rather than heavy calcium carbonate, light calcium carbonate and other fillers (4) Most of the color pigment latex coating uses pigment paste for color matching, which is high efficiency and accurate color When choosing pigment paste, pay attention to the weather resistance grade of pigment paste -General weatherability should be 4-5, light resistance 7-8, and alkali resistance In addition, we should also pay attention to the compatibility and color rendering of silicone acrylic emulsion paint, so as to ensure the decorative effect (5) dispersants and wetting agents have a very small proportion of dispersants and wetting agents in paint formulations, but affect the storage property, opening effect and construction performance of the coatings (6) rheology control agent (thickener) in the emulsion coating, the rheology control agent affects the opening effect and the construction performance of the coating, such as leveling, anti sagging, anti splashing, etc If the coating performance is excellent, and the construction performance is not good, it can not guarantee the decorative and other performance of the coating Therefore, a good film forming agent, silicone acrylic emulsion, and then choose the appropriate pigment / base ratio, excellent pigment, filler, color paste and auxiliaries, can finally produce excellent silicone acrylic latex paint Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,