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Приложения.
1.Сухая масляная алкидная смола. На воздухе автоматически окисляющаяся пленка, может быть превращена в различные лаки, цветные краски и различные покрытия, становясь очень важным классом покрытий в лакокрасочной промышленности.
2. Аминосмолы, изготовленные из аминоалкидной краски горячей сушки; и мочевиноформальдегидные смолы, кислотно-катализируемая мебельная краска, а также с полиизоцианатом, изготовленные из двухкомпонентных полиуретановых покрытий.
3. Алкидная смола используется в качестве пластификатора для термопластичных смол, таких как нитрокраска, этилцеллюлоза, хлорированный каучук, перхлорэтиленовая смола и т. д., с целью улучшения характеристик летучих покрытий.
| Имя | АЛКИДНАЯ СМОЛА |
| Синонимы | TERLON АЛКИДНАЯ СМОЛА Resins, alkyd 3818-70 alkyd resin Phthalic alkyd resins Glycerophthalic resins TIANFU-CHEM ALKYD RESIN Including alkyd molding compounds |
| CAS | 63148-69-6 |
Физико-химические свойства
| Используйте | Use alkyd resin is a resin synthesized from alkyd and polybasic acid. The formation of the polyvalent alcohol in the esterification reaction with the polybasic acid is accompanied by side effects such as visfatation and etherification, and thus a resin formation reaction with extremely complicated structure occurs. Alkyd resin has a specific gravity of 2.16~2.24, a heat-resistant temperature of 210 ° C, and is opaque. It has excellent chemical corrosion resistance. |
Справочная информация
| what is alkyd resin? | polyols and polyacids undergo polycondensation reaction, and the resulting polymer backbone contains a large number of ester groups (-COO-), which is called polyester. In the coating industry, fatty acid or grease modified polyester resin is called alkyd resin, and polyester containing unsaturated double bonds on macromolecular chains is called unsaturated polyester. Alkyd resin is a category of polyester resin, which refers to polyester resin prepared by polyol and polyacid modified by fatty acid (or vegetable oil) and polycondensation reaction. Its molecular structure is based on the ester of polyol as the main chain and fatty acid ester as the side chain. The production history of alkyd resin (alkydresins) is not very long. In the middle of the 19th century, Germany synthesized alkyd resin. In 1927, U.S. R.H. Keener developed alkyd resin suitable for various purposes by using the characteristics of resin properties that vary from polyacid to polyacid. The manufacturing method, especially the resin for coating with phthalic anhydride or maleic anhydride. It is understood that at present, the output of alkyd resin coatings is very large, accounting for about 20% ~ 25% of the total coating industry. alkyd resin coating has the characteristics of good adhesion, brightness and fullness of paint film, and has good workability. However, its coating is soft, water resistance and alkali resistance are not good, so it is mostly mixed with other resins. Water-based alkyd resin is a kind of resin obtained by water-based alkyd resin. It has corrosion resistance, weather resistance, quick drying, etc., and has certain flexibility and good impact resistance. It can be widely used as coatings and adhesives. Due to the introduction of hydrophilic groups, its water resistance is slightly worse than that of traditional solvent alkyd resins. |
| Classification of alkyd resins | Oil-modified polyester resin formed by condensation polymerization of polyols, phthalic anhydride and fatty acids or oils (triglycerides). According to the number and structure of double bonds in fatty acid (or oil) molecules, it can be divided into three categories: dry, semi-dry and non-dry. Dry alkyd resin can be cured in air; non-dry alkyd resin must be mixed with amino resin and cured by heating. In addition, according to the content of fatty acid (or oil) or phthalic anhydride, it can be divided into four oil degrees: short, medium, long and extremely long alkyd resins. After the alkyd resin is cured into a film, it has gloss and toughness, strong adhesion, and has good wear resistance, weather resistance and insulation. |
| application of alkyd resin | alkyd resin is one of the most widely used synthetic resins in the coating industry. as a film-forming substance, alkyd resin can be made into varnish and color paint, which can be made into universal paint or industrial special paint. According to the different oil and oil degree of alkyd resin, it can be summarized into three uses, ① dry oil alkyd resin. Automatic oxidation in the air to form a film can be made into a variety of varnishes, paints and various coatings, becoming a very important category of coatings in the coating industry. ② and amino resin to make amino alkyd baking paint; Combined with urea-formaldehyde resin, acid catalyzed furniture paint can also be made into two-component polyurethane paint together with polyisocyanate. ③ Alkyd resin is used as a plasticizer in combination with thermoplastic resin, such as nitro-based paint, ethyl cellulose, chlorinated rubber, perchloroethylene resin, etc., to improve the performance of volatile coatings. |
| synthesis of alkyd resin | according to the different raw materials of alkyd resin synthesis, the preparation method of alkyd resin can be divided into fatty acid method and alcoholysis method. Метод жирных кислот The raw material used in the fatty acid method is fatty acid. Since polyols, polyacids and fatty acids are miscible, the reaction can be carried out in a homogeneous state. Therefore, when preparing alkyd resin by fatty acid method, polyols, polyacids and fatty acids can be directly mixed together for reaction. alcoholysis method because polyol, polyacid and vegetable oil are not miscible, if they are directly mixed, phase separation will occur, one phase is a mixture of alcohol and acid, and the other phase is vegetable oil. If it is allowed to react directly in a phase-separated state, alcohols and acids will react to form polyester. Vegetable oil hardly participates in the reaction. To a certain extent, the gel cannot be directly mixed for reaction. If you want the reaction to proceed in a homogeneous state, you must use alcoholysis method, first alcoholysis, then esterification, that is, first let vegetable oil and polyol through alcoholysis reaction transesterification into monoglyceride, and then add polyacid for esterification reaction. The fatty acid method is more selective than the alcoholysis method, and a variety of fatty acids can be used to participate in the reaction, but the reaction device is easy to corrode and the cost is high. The alcoholysis method uses vegetable oil directly, with a wide source of raw materials and low cost. And the structure of the resin prepared by the fatty acid method and the alcoholysis method is also different, and a reasonable choice needs to be made according to the actual situation. |
| использование | alkyd resin is a resin synthesized from alkyd and polyacid. Due to the formation in the esterification reaction of polyvalent alcohols and polyacids, there are side effects such as endolipization and etherification, so the resin formation reaction with extremely complex structure appears. Alkyd resin has a specific gravity of 2.16~2.24, a heat-resistant temperature of 210 ℃, opaque, excellent chemical resistance, and is mainly used as a seasoning and adhesive for coatings. |
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