Functional monomer

SPINOMAR® AmSS

Sulfonic acid monomer soluble in organic solvents

AmSS is a new product in which the counter cation of Spinomar® NaSS (Sodium p-Styrenesulfonate) is ammonium type. Previously, AmSS was difficult to obtain industrially, but our company has established a proprietary industrial manufacturing method for AmSS, enabling a stable supply.
AmSS has features such as excellent solubility in organic solvents and not containing alkali metals in its structure, and is expected to be used in applications where NaSS was difficult to use.

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Main Uses

  • Dispersing and cleaning agents: Due to its structure free of alkali metals, it can be used as a raw material for dispersing and cleaning agents, particularly for electronic materials.
  • Acrylic emulsions: With its sulfonate structure that suppresses hygroscopicity, it is suitable for the production of water-based paints, adhesives, and other products with improved water resistance.
  • Other: Antistatic agent, fiber modification, water treatment agents such as ion-exchange membranes

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Feature

AmSS, like NaSS, contains a sulfonic acid group and an aromatic ring within its molecular structure, exhibiting high surface activity and heat resistance (up to approximately 300°C). Additionally, the vinyl group attached to the aromatic ring possesses radical polymerization properties similar to styrene.

AmSS demonstrates superior solubility in various organic solvents compared to NaSS (Fig.1) and exhibits improved hygroscopicity (water resistance) (Fig.2).

Fig.1&Fig.2_rev2

 

Example of solution polymerization (copolymerization with styrene)

AmSS enables copolymerization with hydrophobic monomers in organic solvents, which was challenging with NaSS. In copolymerization with styrene, it produces an organic solvent-soluble random copolymer (Fig.3).          

 Fig.3_rev1

 

Basic Information

Chemical Name Ammonium p-Styrenesulfonate Structural Formula AmSS構造式-1
Molecular Weight 201.24 CAS No. 19922-72-6
TSCA Not registered EC No. Not registered

General Properties

Appearance White to Pale Yellow Wet Powder Boiling Point No Data
Melting Point No Data Flash Point No Data
Specific Gravity and Density No Data

Notes on Handling

  • Use protective equipment to avoid direct contact with skin, hands, and eyes. In the event of contact with skin or hands, rinse with plenty of water. In case of eye contact, rinse eyes thoroughly and seek immediate medical attention.
  • Oral toxicity (rat): LD50 > 2.5 g/kg
  • Store in a cool, dark place in tightly sealed containers to prevent moisture absorption and protect the product from oxidation and polymerization.  

Packaging

As this is a development product, please make separate inquiries.

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