NaSIPA (5-SSIPA)
The main field of application of NaSIPA (5-SSIPA, Sodium SIPA) is the textile industry. NaSIPA improves the dyeability of polyester and nylon fibres. NaSIPA is also used for the manufacturing of "polyester glues", a product of the textile auxiliary industry, and in paints and coatings based on polyester resins where NaSIPA gives hydrosolubility to the resins.
NaSIPA is obtained through the sulfonation of isophthalic acid and its subsequent neutralisation with caustic soda. The sulfonation is a chemical process in which the SO3 group is introduced in an organic molecule.
The SO3 group provides a strong ionic bond with cathionics dyes. This improves the dyeing of synthetic fibres and provides more brilliant and uniform colours. As the SO3 group is hydrophilic, the introduction of NaSIPA as comonomer into a polymer makes it hydrosoluble or hydrodispersible.
Fluorsid's plant has a production capacity of 300 MT/y.
NaSIPA is available in 500kg big bags or in 25kg fiber drums.
Download NaSIPA specification and MSDS.