Coating classification: polyester resin coating

Core tip: Introduction: polyester resin coating is a kind of coating with polyester resin as the main film-forming material It is formed by polycondensation of polyols and polybasic acids The difference with polyurethane coating is that the molecule of polyester coating does not contain amino "- NH -" Polyester resin coating is widely used in middle and high grade coatings, low pollution high solid and powder coatings Classification: According to the type of polyester resin, polyester resin coating can be divided into unsaturated polyester coating, saturated polyester coating, terephthalic acid polyester coating, etc (1) Unsaturated polyester coating Unsaturated polyester coating is Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Home of coatings: brief introduction: polyester resin coating is based on polyester resin as the main film-forming material It is formed by polycondensation of polyols and polybasic acids The difference with polyurethane coating is that the molecule of polyester coating does not contain amino "- NH -" Polyester resin coating is widely used in middle and high grade coatings, low pollution high solid and powder coatings Classification: according to the type of polyester resin, polyester resin coating can be divided into unsaturated polyester coating, saturated polyester coating, terephthalic acid polyester coating, etc (1) Unsaturated polyester paint unsaturated polyester paint is prepared by mixing four components of unsaturated polyester resin styrene solution, organic peroxide and other initiators (cross-linking catalyst), cobalt naphthenate and paraffin styrene Styrene plays a dual role in solvent synthesis of membrane materials The unsaturated polyester coating is characterized by solventless coating, which causes little pollution to the environment by solvent vapor; it can be dried at room temperature, or heated and solidified During the curing process, the paint film shrinks greatly and is not easy to repair; the paint film is hard, brittle and easy to damage; the paint film must be polished and dewaxed and polished; multi-component packaging is inconvenient to use; the construction efficiency is high, and thick coating (up to 150-250) can be obtained by one brush μ m); although adding polymerization inhibitor reduces the effect of air polymerization, the storage stability of paint is not good enough, which limits its application Unsaturated polyester coating is mainly used for high-grade wood furniture, metal surface quick drying putty, television, painting insulation materials, sewing machine, chemical tank coating, etc Unsaturated polyester can also be made into color paint, generally using resin or plasticizer with low viscosity to disperse pigment Polyester resin paint can also be combined with photosensitive materials to make photosensitive coating, which can be sensitized just like photographic film (2) The most commonly used saturated polyester resin in the saturated polyester coating industry is the polyester resin with hydroxyl terminated functional group, which is crosslinked with isocyanate and amino resin to form a film It is characterized by high gloss, good fullness, high hardness, good flexibility, wear resistance and heat resistance, good light and color retention It is suitable to be enameled wire coating (class 155 and class 180), impregnated insulating coating, metal primer, industrial coating and varnish in the middle and high grade of automobiles, outdoor high decorative coating, etc The main varieties are polyester amino baking paint, polyester polyurethane paint, polyester epoxy powder paint, etc (3) Terephthalic acid polyester coating is made of terephthalic acid polyester, benzene, ketone diluent It is characterized by good moisture resistance and insulation resistance It is better to use impregnated insulating paint and enamelled wire paint for motors with hot and wet tapes Performance and index: ① the paint film is full and bright, with strong adhesion and high solid content, but the unsaturated polyester paint has poor adhesion to metal, which can be used as putty, easy to dry and smooth; ② the conjunctiva is thick, with good insulation; ③ the physical and mechanical properties of the paint film are good, especially the toughness, wear resistance, impact resistance and scratch resistance; ④ The paint film has good light and color retention, over baking resistance, excellent weather resistance, and no loss of light and yellowing after long-term exposure to sunlight; ⑤ due to the presence of ester group in the molecular chain, the water resistance is slightly poor; ⑥ the repair performance is poor, and the damaged paint film has traces after repair; ⑦ the use and storage of flammable liquid should be fireproof, with a storage period of 1 year 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,