Name | Phthalates |
Synonyms | Phthalates PHTHALATES |
Molecular Formula | C8H4O4-2 |
Molar Mass | 164.11496 |
product features and uses
Phthalate esters, also known as phthalate esters, are a type of organic compounds produced in large quantities in industry. Most of them are colorless and special odor formed by the esterification reaction of phthalic anhydride and branched monohydric alcohol. Oillike liquid.
R1 and R2 are C1-C13 alkyl or cycloalkyl, phenyl, benzyl, and the like. There are many varieties and excellent performance (compatibility, oil resistance, electrical insulation, cold resistance, processability, etc.). It is often used as the main plasticizer of plastics, and the production volume accounts for about 80% of the total plasticizer. Commonly used are dioctyl phthalate, dibutyl ester, dimethyl ester, dinonyl ester, octyl, dipropylene ester, etc. Among them, dioctyl phthalate (DOP), diisooctyl ester (DIOP) and dibutyl ester (DBP) are the most. Mainly used for polyvinyl chloride plastics. It is also often used in products produced by polyvinyl acetate, alkyd resin, ethyl cellulose, neoprene, etc. Phthalate esters are mostly liquids with higher boiling points. Insoluble in water. Mainly used as plasticizers for various plastics and synthetic rubbers, and a few used as solvents and fixatives for varnishes and fragrances. The consumption of phthalates as plasticizers accounts for more than 60% of the total amount of plasticizers. The nature is relatively stable, and it is a type of organic pollutant that enters the environment. Its presence has been detected in seawater, marine organisms and sediments, and toxic effects on aquatic organisms have been observed. The content in marine organisms is ppb. It is generally analyzed by gas chromatography.
Reference: Yuan Runzhang Editor-in-Chief. Chinese Civil Architecture Encyclopedia Dictionary · Engineering Materials. Beijing: China Construction Industry Press.
Phthalate plasticizers
Phthalate plasticizers are compatible with polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polymethyl methacrylate, polystyrene, ethyl cellulose, cellulose nitrate, cellulose acetate butyrate, etc. Industrial resins and rubbers have good compatibility, and are partially compatible with polyvinyl acetate, polyvinyl butyral, and cellulose acetate.
Phthalate plasticizers are one of the most widely used plasticizers in plastic processing. Excellent comprehensive performance, low volatility, high plasticizing efficiency, low mobility, water resistance, UV resistance, low temperature flexibility, high electrical performance, heat resistance and weather resistance. As an ideal main plasticizer, it is widely used in the processing of polyvinyl chloride, vinyl chloride copolymer and cellulose resin, manufacturing films, sheets, plates, molded products, artificial leather, wire and cable jackets, plasticized paste, etc. Can be used for food packaging materials other than fatty foods. Used for nitrate cellulose paint, it can improve the elasticity and tensile strength of the paint film. It can also be used as a softener for synthetic rubber to improve the resilience of the product and reduce compression set.
Dicyclohexyl phthalate
Dicyclohexyl phthalate is also called plasticizer DCHP. Those precipitated from ethanol are prismatic white crystals, or chemical powders. Relative molecular mass 330.43. Relative density 1.383. Melting point 66 ℃. 1.451 refractive index. Flash point 207.2 ℃. The viscosity 223 mPa s(61 ℃). The solubility in water is lower than 0.01% (25 ℃), slightly soluble in ethylene glycol and certain amines, soluble in most commonly used organic reagents, and completely soluble in hot gasoline and mineral oil. This product has low toxicity.
Dicyclohexyl phthalate is a phthalate plasticizer. It is one of the commonly used plasticizers. It can be used for polyvinyl chloride, acrylic resin, polystyrene, cellulose acetate resin, etc.; Heat-sensitive adhesive, as an adhesive, can improve adhesion, durability and oil resistance; if combined with other plasticizers, it can make the product shrink and compact, which can prevent water vapor from penetrating and volatilization of plasticizers; prepare moisture-proof coating raw materials.