Judging and selection of latex paint

Latex paint is one of the most popular and popular architectural coatings, and it is one of the development directions of architectural coatings. Because of its elegant, fresh decorative effect, non-toxic, odorless and environmentally friendly features, the proportion in architectural coatings is increasing, and it is gradually in line with international standards. China's architectural coatings are shifting from low-end products to medium-to-high-end products. The rise and development of latex coatings is indispensable.

The development and development of latex paints in China began in the 1960s. The real development was in the late 1970s, and the large-scale promotion and application of interior walls, exterior walls and ceilings of buildings began. For more than ten years, latex coatings have made great progress in terms of product variety, product level, production capacity, construction machinery, and promotion and application. Especially in recent years, the influx of high-quality foreign products, coupled with the propaganda of some large companies, has greatly enhanced the popularity of latex coatings and promoted the development of latex coatings.

I. Overview:

Latex paint is commonly known as latex paint. The official name is synthetic resin emulsion paint. It is a kind of water-based paint prepared by adding synthetic pigment emulsion as base material, adding pigment, filler and various additives. Only by clarifying its composition can we distinguish the authentic products in the market. At present, there is a low price in the architectural coatings market (the price is only 2-3 yuan / kg) but it is titled "high-grade latex" and "economic latex paint", and the sales momentum is good. In fact, this kind of product is mainly composed of water-soluble resin such as polyvinyl alcohol or even starch. The name of latex paint is not added or only a small amount of emulsion is added. It is a counterfeit and shoddy product, causing confusion to the market. The material discussed in this article does not include such coatings.

Second, the characteristics of latex paint:

1. Latex paint uses water as the dispersion medium, does not pollute the environment, is safe, non-toxic, and has no fire hazard. It is an environmentally friendly product.

2. Convenient construction, consumers can do their own brush or roller coating construction, construction tools can be cleaned with water.

3. The coating film is fast drying and the construction period is short. Under suitable climatic conditions, coating construction can sometimes be completed on the same day.

4. The decoration is good, there are many colors, luster (no light, matt, semi-light) can choose, the decoration is fresh and elegant. For example, in recent years, the silky latex paint is more popular, and the coating film has silky matt, and the hand feels smooth and delicate like silk, which can create a warm atmosphere for the living room.

5. In terms of maintenance, if you want to change the color, you can apply a refreshing latex paint by simply treating it on the original coating. In developed countries in Europe and America, it has become a family fun to paint latex paint to change the color of housing.

Although the decoration of latex paint is not as luxurious and stylish as the decorative materials such as wallpaper, wooden wall skirt, wood veneer and soft bag, it is more suitable for the comfortable and warm home decoration. Therefore, latex paint is an ideal material for wall decoration in the living room.

Third, the gap between different products: At present, China's architectural coatings market is fiercely competitive, foreign latex paint products have entered China, foreign companies not only bring advanced technology, but also bring a wealth of marketing experience. Although this is not a small impact on the domestic market, it has also promoted the improvement of domestic latex paint levels. What are the differences between latex paint products at home and abroad? One of the outstanding advantages of foreign products is that the “can open effect” is good. After opening the package, it gives a good impression, the appearance is delicate, full, like paint, high viscosity and uniformity and good fluidity; another advantage is good construction, large brushing area per square meter, hiding power Strong, smooth film without brush marks, soft color, good overall decorative effect.

Domestic latex paint products are superior to foreign products in terms of the performance of the selected synthetic resin emulsions and the coatings used to formulate the coatings. Some properties such as water resistance and pollution resistance are superior to foreign products. However, there is still a big gap between the “opening effect” and the construction and appearance of the coating film. After opening the package, it tends to be thick and thick, some even have water, and the lower part has soft precipitate, which must be evenly stirred to achieve uniformity. Some products pay attention to the thickening problem from the appearance, but it affects the fluidity, the construction is poor, the coating brush marks are serious, the color is not soft enough, and the fullness is also poor. If you see the gap, you can improve the quality. At present, some domestic manufacturers have solved the above problems by using foreign auxiliaries and other raw materials. Some manufacturers' latex paint products are comparable to foreign products. Not only the physical properties of the products meet or exceed the national standards, but also a qualitative leap in the construction performance, the coating film has less brush marks and soft color. In addition, it has a greater advantage in price than foreign products and is very promising.

Fourth, the judgment and identification method of latex paint:

1. The canning effect is good, no water, no starch, no rust, no mildew.

2. The construction effect is good, no brush marks, roller marks, large brushing area, good hiding power. Opacity refers to the minimum amount of paint applied evenly on the surface of a wall so that its background color is no longer present, expressed in grams per square meter. The smaller the value, the better, indicating that the amount per unit area is small. In the original national standard GB9756-88 "synthetic resin emulsion interior wall coating", the standard is ≤250 g / m2, using this indicator can calculate the amount of coating required for the area to be painted.

3. The coating film does not drop the powder, and the dirt can be scrubbed with water. This requires that the coating film has a certain degree of scrub resistance. In the national standard GB9756-95 "synthetic resin emulsion interior wall coating", the qualified product is not less than 100 times, and the first-class product is not less than 300 times. Some products have a scrub resistance of up to 2000 times without change in coatings, and some products are only a few times washable, and the coating is damaged.

4. The color of the film is soft and not blooming. Judging whether the latex paint is good or bad should be based on comprehensive analysis and comments on various properties, and should not be based on a certain performance. The choice of latex paint should be based on the use, orientation, size and decoration budget of the room to be renovated by the consumer to select products of different varieties and colors.

Pay attention to the following issues when choosing a latex coating:

A. Try to use brand-name or branded products. Similar products should be preferred for the national environmental protection product mark. The production enterprises of these products are large in scale, high in output, strict in management, and guaranteed in product quality.

B. There should be more important marks and data on the packaging drum of latex paint, such as trademark, manufacturer name, date of manufacture and weight.

C. It is best to buy in building materials malls or specialty stores. These businesses pay more attention to the purchase channels and product reputation, and the product quality is guaranteed. Don't be tempted to buy cheap products at some grocery stores.

D. Check the emulsion paint for mildew, rust, severe water or special odor.

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