Coating knowledge: analysis of performance and application of polyurethane coating

Core tip: polyurethane paint is polyurethane paint It has strong and tough paint film, full luster, strong adhesion, water resistance, wear resistance and corrosion resistance It is widely used in advanced wood furniture and metal surface Due to the excellent properties of polyurethane in many aspects The proportion of polyurethane (excluding architectural coatings) used in the coating industry in China has exceeded 25% Polyurethane coatings occupy a leading position in wood coatings industry, accounting for 75% of the market share, followed by automotive touch up paint, accounting for more than 40% Polyurethane technology is more and more widely used in anticorrosive coatings, plastic coatings and automotive original paint, accounting for 10% of the market share near 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: polyurethane paint is polyurethane paint It has strong and tough paint film, full luster, strong adhesion, water resistance, wear resistance and corrosion resistance It is widely used in advanced wood furniture and metal surface Due to the excellent properties of polyurethane in many aspects The proportion of polyurethane (excluding architectural coatings) used in the coating industry in China has exceeded 25% Polyurethane coatings occupy a leading position in wood coatings industry, accounting for 75% of the market share, followed by automotive touch up paint, accounting for more than 40% Polyurethane technology is more and more widely used in anticorrosive coatings, plastic coatings and automotive original paint, accounting for 10% of the market share In recent years, polyurethane coatings are growing at a growth rate of 15% Polyurethane paint is made by the reaction of polyisocyanate and polyhydroxy compound It can reach the performance of baking paint without baking The coating is hard, wear-resistant, chemical resistant, oil-resistant, solvent resistant, stable, bright and full, which can be used as surface coating for high-end cars The film-forming process of polyurethane two-component resin synthetic coating is: the polymer chemical components in the main agent (- OH) curing agent (- NCO) produce chemical reaction and form film Therefore, in the actual construction, it is not allowed to increase or decrease the content of curing agent at will, which will make the film brittle and easy to blister, etc.; reduction will make the film soft, not dry, not hard enough, and poor scratch resistance In the products sold on the market, there is also a single component PU paint It uses a resin containing - NCO group to absorb water vapor (- OH) in the air for reaction, and its curing mechanism is the same Its advantages are: high hardness, wear resistance, heat resistance, water resistance, solid content of 50% - 70%, good fullness, high construction efficiency, low coating cost, wide application range About 60% of the furniture industry in China use this kind of coating The disadvantages are: high requirements for construction environment, hard to repair paint film damage, limited use time after paint preparation, interlayer must be polished, and strict ratio requirements 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,