Phthalate esters are esters of phthalic acid. People use them mainly as plasticizers. Phthalate esters generally refers to the esters formed by phthalic acid and 4 to 15 carbon alcohols. Common phthalate esters include Dibutyl Phthalate, Diethyl Phthalate and Dimethyl Phthalate. We mainly use phthalate esters in polyvinyl chloride materials. So that polyvinyl chloride from a hard plastic to a flexible plastic. Phthalate esters play the role of plasticizer.
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Dibutyl Phthalate is a colorless, odorless oily liquid, boiling point 337.0±10.0 °C at 760 mmHg, flash point (open cup) ≥160℃, Soluble in common organic solvents and hydrocarbons. Mainly used as the main plasticizer of cellulose resin and polyvinyl chloride. It can be used for colored film, artificial leather and plastic
Diethyl Phthalate is a colorless, transparent, oily liquid, boiling point 294°C at 760 mmHg, flash point (open cup) ≥160℃. It is miscible with ethanol, ethyl ether, acetone, benzene, and insoluble in water. Mainly used as plasticizer, solvent, lubricant, fixative, foaming agent for nonferrous or rare metal mine flotation, gas chromatographic
Dimethyl phthalate is colorless transparent oily liquid, slightly aromatic. It is miscible with ethanol and ether, soluble in benzene, acetone and other organic solvents. It is a plasticizer for a variety of resins and cellulose resins, as well as rubber and vinyl resins.
There are more than 30 types of phthalate esters. Phthalate esters generally refer to the esters formed by phthalic acid and 4 to 15 carbon alcohols. Among them, dioctyl phthalate is the most important variety.
Phthalate esters is a kind of plasticizer, which is widely used in industry, medical treatment, life and other fields.
As a widely used plasticizer, phthalate esters are widely used in food processing and packaging, floor manufacturing, and automobile production industries.
People use dioctyl phthalate in the production of flexible PVC materials contained in raincoats, rain shoes, gloves and other clothing.
Phthalate esters are often used in the manufacture of medical devices, such as blood bags and injection syringes related to human health.
Weifang Integratechem Co., Ltd. is a leading, experienced and professional supplier of phthalate esters. Now we manufacture and supply a series of phthalate esters, mainly used as plasticizers, solvents, adhesives, coatings, inks, organic Synthetic intermediates, etc. We are continuously committed to providing customers with competitive prices and consistent service to meet their needs.
According to the chemical structure. Can be divided into: (1) Phthalate esters; (2) Aliphatic dibasic acid esters; (3) Phosphate esters (4) Epoxy compounds; (5) Polymeric plasticizers; ( 6) Benzene polyester; (7) Chlorine-containing plasticizer; (8) Alkyl sulfonate ester; (9) Polyol ester; (10) Other plasticizers.
It is formed by esterification of phthalic acid and alcohol in the presence of a catalyst, such as sulfuric acid.
Use a catalyst that has good catalytic activity and can be removed from the system without neutralization and water washing, or a catalyst that forms a homogeneous phase with the ester at the reaction temperature and precipitates in a solid state after lowering the temperature.
The carboxylic acid and alcohol can be heated in the presence of a small number of catalysts (concentrated sulfuric acid, dry hydrogen chloride, strong acid type ion exchange resin) to form esters. This reaction is called esterification. Esterification is a reversible reaction, and when equilibrium is reached, a certain number of reactants and products are present.
The functional group of Phthalate Esters is -COO-, which is formed by dehydration of carboxyl group (-COOH) and hydroxyl group (-OH). Phthalate Esters have the characteristics of typical ester functional groups, including saponification and hydrolysis reactions. Transesterification reactions are mainly used to convert ester products into useful plasticizers.
Phthalate Esters is a kind of plasticizer, which is widely used in industry, medical treatment, life and other fields.
As a widely used plasticizer, phthalates are widely used in food processing and packaging, floor manufacturing, and automobile production industries.
Di-(2-ethylhexyl) phthalate (DEHP) is often found in flexible PVC materials contained in raincoats, rain shoes, gloves and other clothing.
Phthalates are often used in the manufacture of medical devices, such as blood bags and injection syringes related to human health.
Since Phthalate Esters are dicarboxylic acid, if the alcohol involved in the reaction is a monol, then one molecule of phthalic acid reacts with two molecules of a monol to produce a molecule of Phthalate Esters. After the coefficients corresponding to the chemical reaction are multiplied by their respective molecular weights, the ratio between the three products is the ratio of raw material consumption.
The most cost-effective plasticizers are dibutyl phthalate and dioctyl phthalate.
Dimethyl phthalate
The word “ester” can be preceded by the corresponding carboxylic acid and alcohol names. The word “alcohol” can generally be omitted, that is, “some” acid “some” ester. But the ester of polyols, generally put the “acid behind, called” an alcohol an acid ester.”
Heating and adding catalyst can only accelerate the reaction speed, and has no effect on the composition of the balanced material. In order to increase the yield of esters, excessive carboxylic acids and alcohols are often added, or the resulting water is constantly removed from the reaction mixture. If the boiling point of the ester produced is very low, the ester can also be steamed out. In short, the equilibrium is destroyed to improve the yield of ester. For example, the industrial production of ethyl acetate is to use excessive acetic acid, the generated ethyl acetate and water azeotrope (water 8.6%, ethyl acetate 91.4%, constant boiling point 70.45℃) to steam out, so that the balance is destroyed, and then continue to add acetic acid and ethanol, continue to steam ethyl acetate and water, continuous production.
The hydrolysis of esters in alkali solution is also called saponification reaction, which is because the advanced fatty acid salt obtained by alkaline hydrolysis of grease is the reason of soap.
With extensive experience and expertise, Weifang Integratechem Co., Ltd specializes in supplying high-quality, effective phthalate esters. As one of the leading manufacturers and suppliers in China, we are equipped with professional and productive phthalate esters factory. Please feel free to buy.
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