General knowledge of coating: application of nitrocellulose wood paint

Key tips: 1 Introduction of nitrocellulose wood paint Nitrocellulose paint (hereinafter referred to as "nitrocellulose paint" and "NC paint") is a solvent paint composed of nitrocellulose (hereinafter referred to as "nitrocellulose") as the main film-forming material, and alkyd resin, modified rosin resin, acrylic resin, amino resin and other soft and hard resins Nitrocellulose paint is used to cover the surface of wood furniture It has many advantages over other kinds of paint For example, quick drying, fast hardening, soft luster, good hand feel, convenient construction, low cost, especially nitrocellulose Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: 1 Nitrocellulose paint (hereinafter referred to as "nitrocellulose paint, NC paint") is a solvent based paint composed of nitrocellulose (hereinafter referred to as "nitrocellulose") as the main film-forming material, with alkyd resin, modified rosin resin, acrylic resin, amino resin and other soft and hard resin Nitrocellulose paint is used to cover the surface of wood furniture It has many advantages over other kinds of paint For example, fast drying, fast hardening, soft luster, good hand feel, convenient construction, low cost, especially nitro super clear paint finish, light color, good fullness, good leveling, most suitable for light color wood coating, when used, if the process matching is reasonable, good results can be achieved Nitrocellulose wood paint advantages: strong volatility, soft luster, fast drying speed, paint spray 10 minutes dry And it can be polished, polished and polished to modify the unique performance of paint film caused by defects during construction, which is easy to be renovated Simple proportion, convenient construction and good hand feeling of the finished product Disadvantages of nitrocellulose wood paint: poor environmental protection performance due to raw materials Nitrocellulose is the main film-forming material of nitrolacquer, which is composed of alkyd resin, modified rosin resin, acrylic resin, amino resin and other soft and hard resins Generally, dibutyl phthalate, dioctyl ester, oxidized castor oil and other plasticizers should also be added The main solvents are esters, ketones, alcohol ethers and other real solvents, alcohol and other cosolvents, and benzene and other diluents It needs to be polished and painted many times, which requires high level of painters The paint surface is yellowing, aging resistance is poor, and it is not resistant to high temperature 2 The application range of nitrocellulose paint is still widely used in wood furniture and interior decoration because of its special advantages which are hard to be replaced by other paint products It is favored by the market and consumers Among them, the following varieties are widely used: ① nitrocellulose varnish, which can show the texture of wood grain The varieties include transparent primer, transparent putty, varnish for covering and Matt varnish, which not only retain the natural texture of wood, but also effectively protect the material; ② nitroenamel - cover the coating with solid color, including nitro primer, secondary primer, putty, surface enamel and Matt enamel; ③ Nitrocellulose crackle paint - used as art paint in the decoration of indoor facilities in the 1950s and 1960s Nowadays, some antique furniture exported to the United States and Western Europe in Guangdong still use common nitrocellulose paint and crack paint For example, metal parts such as anti-theft doors are decorated with crack paint to imitate leather, which is also widely used According to the requirements of sanitation and environmental protection, besides the prohibition of heavy metal pigments, there are also strict requirements for organic volatiles In view of the new situation that the production and application of coatings are more and more strict in non-toxic, green and environmental protection, water-based coatings (water-soluble, water emulsion), high solid, solvent-free, powder coatings, etc have become the mainstream of all kinds of coatings research and development Although nitrocellulose paint has good decorative properties such as fast drying and simple construction, its disadvantages are also obvious The solid content is too low, the variety and quantity of organic solvent consumed are large, which exceeds the index specified in the national standard gbl8581 According to the requirements, the solid content should be gradually increased and the content of organic volatile should be reduced However, in order to occupy the market cheaply, some manufacturers adopt high viscosity and low content The method of solid content can reduce the cost of products This is contrary to the requirements of environmental protection, and it also damages the interests of consumers 3 The majority of the products produced and sold in the current market are external nitrolacquer Due to the poor outdoor weather resistance of the nitrolacquer, the high requirements such as outdoor facilities such as automobile coating, other vehicles and bridges coating and construction facilities are basically no longer using the nitrolacquer, This kind of products are mostly used in wood furniture and interior decoration In view of this situation, the next step must be to improve the nitrolacquer to overcome the shortcomings of low solid content and high VOC based on the advantages of fast drying, so that the production and application of nitrolacquer can develop along the track of Health Science For this reason, the following views are put forward for the improvement and improvement of nitrolacquer in the future Increase the solid content to more than 50% During the construction, VOC shall be controlled to meet or lower than the national standards There are five measures: ① optimize the use of nitrocellulose with low viscosity; ② select alkyd resin with low viscosity and high solid content or other resins to make the solid content of the resin reach more than 80%; ③ adjust the proportion of nitrocellulose and soft resin from the formula according to the requirements of furniture coating; ④ Choose cheap solvent with strong dissolving power to reduce the viscosity of the product; ⑤ choose the relevant additives used in furniture coating to improve the film-forming decoration performance To improve the solid content of nitrocellulose paint, the price of the original paint will be increased, but considering the overall construction cost, it is a downward trend 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,