Paint knowledge advantages of polyurethane paint

The main results are as follows: 1 Polyester paint can form acyclic and / or annular hydrogen bond between polymer molecules Under the action of external force, hydrogen bond can separate and absorb external energy (20-25kj / mole) When the external force is removed, the hydrogen bond can be formed again Such hydrogen bond cracking and reversible repetition of re formation make polyurethane paint film have high mechanical wear resistance and toughness Compared with other paints, under the same hardness, due to the effect of hydrogen bond, polyurethane paint film has the highest elongation at break, so it is widely used as floor paint, overtime paint, high decorative anticorrosive paint, etc 2 Some kinds of coatings (such as epoxy, chlorinated rubber, etc 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 Paint Home News: 1 Polyester paint is characterized by the formation of acyclic and / or annular hydrogen bonds between polymer molecules Under the action of external forces, hydrogen bonds can be separated and absorb external energy (20-25kj per mole) When the external force is removed, the hydrogen bond can be formed again Such hydrogen bond cracking and reversible repetition of re formation make polyurethane paint film have high mechanical wear resistance and toughness Compared with other paints, under the same hardness, due to the effect of hydrogen bond, polyurethane paint film has the highest elongation at break, so it is widely used as floor paint, overtime paint, high decorative anticorrosive paint, etc 2 Some kinds of coating (such as epoxy, chlorinated rubber, etc.) have good protection function but poor decoration; some kinds (such as nitrocellulose paint, etc.) have good decoration but poor protection function However, polyurethane paint has both protection and decoration, which can be used for the coating of high-grade wood, piano, airliner and so on 3 Strong film adhesion Polyurethane, like epoxy, can be configured into excellent adhesive Therefore, the coating has excellent adhesion to a variety of surfaces (metal, wood, rubber, concrete, some plastics, etc.) The author's experience shows that for some metal surfaces, the adhesion of polyurethane paint is slightly lower than that of epoxy paint, but for rubber polyurethane paint is higher than that of epoxy paint 4 The elasticity of the coating can be adjusted according to the demand, from the very hard coating to the very flexible elastic coating, while the general paint such as epoxy, unsaturated polyester, amino alkyd can only be made into a rigid coating, which is difficult to give high elasticity 5 The film has excellent chemical resistance, acid, alkali, salt liquid and petroleum products, so it can be used as maintenance coating for drilling platform, ship and chemical plant, inner wall coating for petroleum storage tank, etc 6 It can be dried at high temperature and solidified at low temperature In the typical room temperature curing coatings: epoxy, polyurethane and unsaturated polyester, it is difficult to cure epoxy and unsaturated polyester below 10 ℃, only polyurethane can cure normally at 0 ℃, so the construction season is long Because it can cure rapidly at room temperature, it can be used in large projects such as large oil tanks and large airplanes at room temperature, and the effect is better than that of ordinary baking varnish 7 Polyurethane paint can be made into - 40 ℃ resistant varieties It can also be made into high temperature resistant insulating paint with properties similar to polyimide 8 The electromagnetic wire coated with polyurethane paint can automatically apply tin in the molten solder without scraping paint, which is especially suitable for the assembly of telecommunication equipment and instruments 9 It can be combined with polyester, polyether, epoxy, alkyd, polyacrylate, cellulose acetate butyrate, vinyl chloride vinyl acetate copolyester, asphalt, dry oil, etc to make many kinds of paint according to different requirements 10 It can be made into solvent, liquid solvent-free, powder, water-based, single filling, two filling and other forms to meet different needs 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,