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[Chemical Knowledge]：Properties and Uses of Diisononyl Phthalate

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Diisononyl phthalate (DINP) is a widely used chemical raw material with excellent performance and wide application. This article will detail the nature and use of DINP.

1. the properties of phthalic acid diisononyl ester

1. Physical properties
phthalic acid diisononyl ester is a colorless, transparent, odorless, non-volatile oily liquid. Its density is about 0.966-0.972g/cm³, the refractive index is about 1.485-487, and the boiling point is high, about 360-370 ℃. DINP is insoluble in water, but is miscible with most organic solvents.

2. chemical properties of
phthalic acid two isononyl ester has good chemical stability, can resist acid, alkali, salt and most organic solvents. Under high temperature and oxidation conditions, DINP may undergo decomposition and oxidation reactions. In addition, DINP is also flammable, in case of open flame, high heat or oxidant contact, there is a risk of combustion and explosion.

2. the use of diisononyl phthalate

as an important chemical raw material, diisononyl phthalate is widely used in plastics, rubber, coatings, inks and other fields. The following are the main uses of DINP:

1. Plastic plasticizer
diisononyl phthalate is a commonly used plastic plasticizer that can improve the processing performance and use performance of plastics. It is widely used in polyvinyl chloride (PVC) plastic products, such as wire and cable, pipe, artificial leather, shoes and so on. Adding DINP can reduce the hardness and brittleness of plastic products, increase their flexibility and ductility, and improve the processing performance and service life of products.

2. Rubber softener
Diisononyl phthalate can also be used as a rubber softener, which can improve the plasticity and processability of rubber. It is suitable for natural rubber, synthetic rubber and other rubber products, such as tires, rubber hose, tape and so on. The addition of DINP can reduce the hardness of the rubber, increase its flexibility, and improve the wear resistance and crack resistance of the product.

3. Coating and ink additive
Diisononyl phthalate can be used as an additive for coatings and inks to improve its leveling, drying and weather resistance. It is suitable for various paints, coatings, printing inks and other products, can improve its gloss, adhesion and water resistance and other properties.

In conclusion, as an important raw material for chemical production, diisononyl phthalate has a wide range of uses and good performance. When using DINP, it needs to be selected and used according to specific product requirements and process conditions to ensure its safety and effectiveness.

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