Isophthalic Acid Is Used In The Production Of Polyethylene Terephthalate Resins And Unsaturated Polyester Resins, FRP/Polyurethane Resins And Insulation Materials

 

Isophthalic Acid

Isophthalic Acid is a colorless crystalline solid with a molar mass of 166 grams per mole. It is an aromatic dicarboxylic acid that is industrially produced by oxidizing meta-xylene using oxygen in the presence of a catalyst. It is also produced by fusing potassium meta sulfobenzoate with potassium formate in the presence of chromic acid.

Commercially, it is used primarily as a polymer additive in the production of plastic bottles and other resins. It is also a raw material for the production of high-quality unsaturated polyester resins and alkyd coatings.

Isophthalic Acid is an excellent reducing agent, and it can be used to reduce the crystallinity of PET (polyethylene terephthalate) copolymers in bottle-making. Its use for this purpose is one of the primary reasons that the world production of isophthalic acid increased by 50% in the last decade.

It is also a good reducing agent for unsaturated polyester resins, alkyd coatings, and other types of plastics. It can be used to increase the strength of alkyds and polyesters, improve the lubricity of plastic parts, increase water resistance in polymers, and enhance clarity in bottles.

The oxidation of mixed alkyl xylenes with bromine in a liquid phase is the most common method for Isophthalic Acid synthesis, although it can be prepared from monomethyl xylenes and other aromatic dicarboxylic acids. This oxidation is usually done under controlled conditions, and the results can be quite predictable.

In the manufacturing of high-quality unsaturated polyester resins, it is mainly used to prepare monomer and a variety of auxiliary chemicals, including diesters, alkyd and polymer intermediates, and resin modifiers. The resulting resins are a major component in the production of polyurethane and fiberglass-reinforced plastics.

It has several other uses, including as a dyeing agent for special fibers. It can also be used to produce hot melt adhesives, printing inks, and other resin plasticizers.

Isophthalic Acid is a strong and stable organic compound. It is nontoxic and biodegradable, allowing it to be easily recycled in the environment. It is also a strong antioxidant, and is readily available.

LOTTE Chemical Corporation expects this investment to be a major step toward a greener future and a response to the climate change crisis. The investment is almost USD 491.0 million and is aiming to strengthen competitiveness of specialty materials and eco-friendly materials for promoting local economy.

 

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