[Castor oil supply and procurement] Castor oil plays an important role in the synthesis of alkyd resins

Alkyd resin is a polybasic acid and polybasic acid modified with vegetable oil or fatty acid The reactant of alcohol, which includes drying, semi-drying and non-drying oleoresins, is widely used in various types of coatings. Alkyd resin has good gloss and dispersion. According to its use, it can be divided into resin for baking paint, resin for self-drying paint, resin for polyester paint, modified nitro, resin for chlorinated rubber paint, etc. The resin is widely used in vehicles, machinery, household appliances, woodware and other aspects.

Castor oil plays an important role in the synthesis of alkyd resins:

According to suppliers of castor oil Understanding: Castor oil is an almost colorless or slightly yellow clear viscous liquid with a slight odor and a light and then slightly pungent taste. This product is easily soluble in ethanol and can be mixed with absolute ethanol, chloroform, ether or glacial acetic acid. Castor oil has good stability, color retention, flexibility, pigment dispersion, wettability, lubricity, low temperature properties, electrical properties and biological properties. Therefore, it can be used in varnish coatings, artificial leather, inks, seals Agents, lubricants, stationery, cosmetics, electrical insulation materials, medicine, etc.

In terms of production technology, it does not need to go through the alcoholysis stage but directly reacts with glycerol and phthalic anhydride to produce resin. It can react at 200°C to produce non-drying alkyd resin, which itself cannot make paint or film. , must be used in combination with nitrocellulose, chlorinated rubber, etc., or with amino resin, and will copolymerize with alkyd resin during drying and solidify; at the same time, alkyd resin also plays a role in plasticizing and increasing adhesion. Castor oil can react at >360°C, relying on the catalytic effect of polybasic acids to dehydrate the hydroxyl groups on castor oil to obtain dry alkyd resin. For example, castor oil modified short oil resin has strong adhesion, high fullness, good leveling and excellent mechanical properties, and can be used in nitro, amino, polyester varnishes, etc.