NaSIPA CAS NO.6362-79-4

Chung Hwa Chemical Industrial Works, Ltd., is the first Sulfuric acid manufacture on Taiwan, also the Chemical manufacture over 60 years.

We are a big manufacture of 5-Ssipa ( NaSIP ) and LiSIP that are the materials of CD-PET or hydrophilic-PET.

Our strength is to leverage our own industrial experience and ODM ability to collaborate with clients, delivering customized products that meet their demands. 

Moreover, we dedicated ourselves to establishing superior quality, environment, safety and health management systems and have received international certifications such as ISO 9001, ISO 14001, and OHSAS 18001.

As the third monomer of the cationically modified polyester CDP, it is mainly used for polyester, film and the like.

Sodium isophthalate 5-sulfonate (5-SSIPA) is commonly used to prepare amine-free aqueous polyester resins and aqueous polyurethanes suitable for use in a variety of coatings.

Generally, the structure of the reactive aromatic dibasic acid is similar to Eastman PIA (refined isophthalic acid).

The aromatic ring structure gives the coating excellent hardness and high gloss.

A lithium ion compound similar to 5-SSIPA is a more polar monomer that imparts greater water solubility to the resin, so it is added in smaller amounts when used.

5-SSIPA is a monomer for polyester resins for synthetic food packaging adhesives and has been approved by the FDA.

A water-soluble polyester resin having a high acid value is obtained, and after further neutralizing with an amine, a water-soluble salt can be obtained.

The polyester resin synthesized with 5-SSIPA is an aqueous polyester due to the ionic character exhibited by the sodium sulfonate group of 5-SSIPA.

Characteristics：Water-dispersed resin does not require the use of an amine neutralizer, and the coating has excellent hardness and high gloss.

Improves the colorability and light resistance of polyester and nylon fibers. Better PET printability for inks.Excellent interlaminar adhesion of tape.