By making the best use of electrochemistry and organic synthesis and polymer synthesis techniques, we have focused on the development of materials related to electric vehicles (EVs) and batteries, such as polymer gel electrolytes and water-based binders for lithium batteries. We have also developed environmentally friendly ultraviolet (UV)-curable materials free of volatile organic compounds (VOCs), in addition to conducting the recovery and regeneration of resources.

Rare Metal Recovery Process New Allyl Ester Monomer Polymer Electrolyte (All-solid / Gel) Water based binder

Water-Based Binder for Energy Storage Devices

  Water-based binder<br/><br/><br/><br/>
  Water-based binder

A water-based binder for energy storage devices, such as Li-ion batteries (LiBs), Li-ion capacitors (LiCs), and electric double-layer capacitors (EDLCs), has been developed on the basis of polymer design, polymerization techniques, and solid polymer electrolyte technology. The binder reduces the environmental load by not using an organic solvent and provides low resistance, long cycle lifetime, high dielectric strength, and other benefits to these devices. We can customize and further specialize the binder with higher adhesion strength or lower resistance at your request.

Performance radar chart

   Adhesion strength

   AC Impedance

All-Solid Polymer Electrolyte

  SPE film(thickness:50 μm)<br/><br/><br/><br/>
  SPE film(thickness:50 μm)

Using an all-solid polymer electrolyte (SPE) film of several tens of micrometers thick in LiBs makes  it possible to prepare a bipolar cell, and also makes it possible to increase the energy density (Wh/l) of the devices. In addition, SPE is more compatible with sulfur or organic cathode active materials compared with liquid electrolytes, and it is stable with metal lithium anodes. With these merits, it is possible to increase the LiBs energy density. The technology is one of our development themes, and in the near future, It will support your life in the aspects of both energy and the environment.

Polymer Gel Electrolyte

  Polymer gel electrolyte<br/><br/>
  Polymer gel electrolyte

Polymer gel electrolytes are expected to be effective materials for improving the safety and upsizing of LiBs. The liquid electrolytes used in LiBs become polymer gel electrolytes by adding above 3 wt% of our polymers. The polymer is highly compatible with the liquid electrolytes of not only LiBs but also EDLCs and LiCs. The polymer makes it possible to produce gel electrolyte with good elasticity and retentivity of liquids.

New Allyl Ester Monomer

  Newly developed<br/>
  Newly developed

Osaka Soda has developed phthalate-free allyl ester monomers.

When new monomers are used as  crosslinking agents for unsaturated polyester resin,  curing times of  varnishes containing new monomers are shorter than that of DAP monomer (DAPM, our product). Furthermore, they can be considered as styrene alternatives because they can reduce odor compared with styrene monomer.

Varnish properties



DAPM (our product)

Styrene monomer

Newly developed



 ・Crosslinking agents for unsaturated polyester resin used for insulating varnish and CIPP

 ・Dry-type unsaturated polyester material

 ・Reactive plasticizer for PVC

Technologies for Rare Metal Reclamation

  Materials recycling facility<br/><br/>
  Materials recycling facility

We are developing our resource recycling business and have perfected technologies for the reclamation of rare earths, rare metals and mercury, etc. from fluorescent tubes. Currently, in order to promote the efficient use of resources, we are putting effort into developing new reclamation technologies for rare metals.