General knowledge of coating: Standard Classification of putty powder

Core tip: what is putty powder Putty powder is a kind of surface leveling powder material for pretreatment of construction surface before paint construction Its main purpose is to fill the pores of construction surface and correct the curve deviation of construction surface, so as to lay a good foundation for obtaining even and smooth paint surface Standard classification of putty powder Our national standard divides the finished putty into general putty (Y type) and water-resistant putty (n type) Note: it is indicated on the product inspection report which model and standard index is used for inspection Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: what is putty powder? Putty powder is a kind of surface leveling powder material for pretreatment of construction surface before paint construction The main purpose is to fill the pores of construction surface and correct the curve deviation of construction surface, so as to lay a good foundation for obtaining even and smooth paint surface The standard classification of putty powder is our national standard The finished putty is divided into general putty (Y type) and water-resistant putty (n type) Note: it is indicated on the product inspection report which model and standard index is used for inspection 1 General putty (Y type): used in places where water resistance is not required It is composed of Shuangfei powder (calcium carbonate), starch glue and cellulose Among them, starch glue is a kind of water-soluble glue, which is usually used by construction teams in Changzhou area due to its water solubility and water resistance 2 Water resistant putty (type n): it is used in places requiring water resistance and high bond strength It is composed of Shuangfei powder (i.e calcium carbonate), lime calcium powder, cement, organic rubber powder, water retaining agent, etc After the water and alkali resistance tests, no blistering, cracking or falling off was found, and there was no abnormality in 48 hours immersion and 24 hours alkali resistance in water The putty powder is made up of a small amount of paint base, a large amount of filler and a proper amount of coloring pigment The pigments used are mainly iron red, carbon black, chrome yellow, etc The fillers are mainly calcium bicarbonate, talcum powder, etc It can be used to fill the working surface with local depression or scrape off the whole surface It is usually applied to the surface of the primer layer after the primer layer has dried completely It is required to have good adhesion and no cracks during baking 1 Water resistant putty: one ton of calcium carbonate, 10 kg of sodium carboxymethylcellulose (CMC), 8 kg of pre gelatinized starch can be mixed in the mixer for 10-15 minutes, and this formula is rarely used now 2 Water resistant putty for interior wall: 70% ~ 80% of heavy calcium (or talcum powder), 20% ~ 30% of gray calcium (lime powder), and proper amount of cellulose added 3 Water resistant putty for exterior wall: stone powder + gray calcium + cement + cellulose + rubber powder (EVA, PVA) putty powder contains formaldehyde At present, the semi-finished putty from the regular manufacturers bought in the current market has nothing to do with formaldehyde, because the current state also attacks the building materials containing formaldehyde in the products Now, the large flow in the market is water-resistant putty, and the putty powder is composed of natural mineral powder and water-based glue Because the product has a long life without pollution, it is impossible to contain formaldehyde, but Engineering putty is usually prepared on site In order to increase the adhesion of putty powder, a large amount of building glue (including formaldehyde) is added Usually people talk about formaldehyde discoloration, because formaldehyde pollutes the environment very much and contains a lot of carcinogens, so entering the wall unconsciously becomes an environmental killer all the time It can be seen that putty powder has a great relationship with formaldehyde, but now many manufacturers have launched environmental protection putty powder, which is not only environmentally friendly and pollution-free, but also can control the air There is a negative ion putty powder that contains tourmaline electric in its composition Stone, through the decomposition of water molecules in the air to generate negative ions to control the air, negative ions can neutralize formaldehyde into dust and fall in the air, can also remove the heavy dust in the air, and improve the metabolism 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,