Really stone paint have adornment sex is strong, widely applicable, good durability, not easy to fade and other characteristics, so it is a kind of exterior wall decorative paint is quite popular with the users. In really stone paint construction applications. Often there will be some impact quality. Decorative effect, has a certain universality. These problems are sometimes caused by improper raw materials selection and formula design, some are caused by the construction method is not correct.

1 coating too soft

Good quality really stone paint coating should be very hard, can't pull the nail. If in good weather conditions construction still available after 3 day nail pull. Coating shall be deemed to be too soft, many manufacturers in the preparation of really stone paint, using the same as the preparation of emulsioni paint of emulsion. This is wrong _ real paint formula of emulsion content is low. When the film because of the existence of a lot of sand coating is not quite close together. Therefore, should choose dry force higher minimum film-forming temperature I high some emulsion.

According to research, used in the preparation of emulsion adhesive strength really stone paint should not be less than 3 MPa, the minimum film-forming temperature should not be less than 20 c. Higher minimum film-forming temperature may cause the temperature low film-forming faults not easily, can be more appropriate method to solve the film-forming additives. Film-forming additives can be completely evaporate after coating is dry, generally will not affect the performance of the coating. At present in the production of the other sex coating use more alcohol cool a 12 in really stone paint USES also have better effect, use generally add five copies per one hundred emulsion, winter day can add some more appropriately.

2 coating white under the influence of water

Used to really stone paint film forming agent of acrylic emulsion in a dry and cool after should have good water resistance. So the coating after drying the water should not be white now. But some really stone paint coating in every time it rains to buckle. White, coating become loose, and after the rain pavilion. Classics sun is basked. Coating and restore the original color: by the analysis. This is due to the bad water resistance coating, absorbed water caused by the _ according to the analysis of the structure of the polyacrylic acid vinegar really stone paint coating shall have good water resistance. But as a result of acrylic emulsion vinegar add people in synthetic surfactants, some manufacturers in order to increase the stability of the emulsion. The surfactant used greatly excess: some manufacturers in the preparation of really stone paint with methyl cellulose, hydroxyethyl cellulose materials such as as a thickener. And sodium benzoate as a preservative. These substances are soluble or hydrophilic coating film after in coating, it greatly reduces the water resistant performance of the coating. The experiment shows that the pure milk mixed with quartz sand.

Do not add any additives, spray coating formation. Its bibulous rate is. 0.42%; And on the basis of the above coatings in 0.4% ethyl cellulose. Bibulous rate rose to 4.3% due to really stone paint coating thicker, once absorbed moisture, it is not easy to release in a relatively short period of time, thus causing look pale and internal porous coating.

To solve the above problems, can improve the quality of raw materials and formulation "first should choose the most excellent emulsion ErJin years development of organic silicone modified acrylic emulsion, silicon a crylic-acid emulsion vinegar itself has good hydrophobic, which can effectively resist the moisture of shooting. Secondly. Should choose a dedicated thickener. Thickeners thickening effect is good. Less dosage, so as not to cause the coating performance dramatically change 2 there are a lot of thickening agents on the market at present to choose from, such as Germany henkel company, Taiwan's modest. Preservatives should also choose special material. Recently, organic silicon waterproof liquid in Shanghai field supply added people really stone paint, receive unexpected good results. Rain drops fell in xu layer on the surface without ooze people, can make the really stone paint coating both decorative effect, have waterproof function again.

3 when spraying sand off too much

Some really stone paint off the sand from spraying is more, serious when can reach 1/3, wasteful. In addition to the cause of the construction methods, raw materials and formulation can also cause the phenomenon of two current sand used to really stone paint, which has two kinds of artificial sand and natural sand. According to the observation. Really stone paint lines with natural sand preparation. Off sand amount to less than when using artificial sand. This may be associated with the hardness, surface state of sand. In general. With high hardness, the surface is smooth sand tightly easily off the sand. In addition, the preparation of really stone paint. Gradation of the sand is also very important. Grading the appropriate really stone paint spraying out less sand phenomenon, not only more closely and coating. So when preparation really stone paint, natural sand as far as possible using killings, and makes the sand has the certain grading. Studies show that in the lower, construction sand is less. Coating quality is better; Particle size is greater than 10 to 5% 25% of the 10-15 eyes asked, 50-100 to 50%, less than 20% to 100.

In addition. When spraying out sand coating consistency of phenomenon also has certain influence. Construction is difficult when the coating is too thick. Is too thin, the sand on the wall at the beginning of the dry degree is too low, will cause the sand falling: so. As much as possible without difficulty in construction, improve the consistency of coating, sand to help out the solution of the problem.