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Introduction to Products Developed by Us

TBIS® Series

Bisphenol derivatives

Reflecting the market needs for high functional products, Taoka is developing various bis-phenol derivatives which is called "TBIS®".
TBIS® products is an excellent raw material for optical plastics which require high transparency and heat-resistance.
Especially, Fluorene-type products have a high refractive index and low birefringent due to its "Cardo Structure".

Chemical name
[product name]		StructureTypical properties, etc.Stage
TBIS®-G
CAS No.117344-32-8
CSCL4-1748
AppearanceWhite Crystalline Solid
Melting point164℃
Refractive index1.62
 Commercial
CHBP-F
CAS No.843-55-0
CSCL4-44
AppearanceWhite Crystalline Solid
Melting point194℃
Refractive index1.59
 Commercial
TBIS®-RX
CAS No.4081-00-9
CSCL-
AppearanceWhite Crystalline Solid
Melting point270℃
Refractive index1.65
 Pilot
TBIS®-ZP
CAS No.2115022-46-1
CSCL-
AppearanceWhite Crystalline Solid
Melting point203℃
Refractive index1.67
 Pilot

CSCL:Chemical Substances Control Law

[Applications] Raw Monomer or Modifier for Optical Resin or Electronic Materials.

Epoxy delivertives

This product has a high refractive index, transparency and heat-resistance due to it's unique structure containing a fluorene skeleton.
Compared to existing bisphenol fluorene epoxy resins, these compounds have a high refractive index, high solvent solubility, and excellent handling characteristics.

Name of chemical
[product name]		StructureTypical properties, etc.Stage
TBIS®-GG
CAS No.259881-39-5
AppearanceLight Yellow Sticky Solid
5% weight Loss Temp.363.4℃
Viscosity (150℃)52.5mPa･s
Refractive index1.60
 Pilot
TBIS®-RXG
CAS No.47769-72-2
5% weight Loss Temp.342℃
Viscosity (150℃)374mPa･s
Refractive index1.62
 Laboratory

[Applications] Electronic Materials (Photoresist, Mounting Agent), Optical Materials, Adhesive, Coating Materials, Laminating Agent, Additives etc.

Acid dianhydride derivative

This product has a high refractive index, transparency and heat-resistance due to it's unique structure containing a fluorene skeleton.
When used as a monomer for polyimide, the workability will be improved due to its superior solvent solubility.

Name of chemical
[product name]		StructureTypical properties, etc.Stage
TBIS®-RXN
CAS No.1830316-18-1
CSCL-
AppearanceWhite Crystalline Solid
Melting point332℃
Refractive index1.63
 Laboratory

[Applications] Raw Material for Polyimide or Polyamide, Curing Aagent for Epoxy Resin, or Urethane.

Episulfide delivertive

The episulfide shows the characteristic of curing at low temperatures.
The cured material is also low in the odor that is unique to sulfur compounds and excels in transparency while also having properties such as a low dielectric characteristic and low water absorbency.

Name of chemical
[product name]		StructureTypical properties, etc.Stage
TBIS®-AHSP
CAS No.2489336-20-9
Appearanceviiscous liquid
Viscosity (25℃)30Pa･s
Refractive index1.53
 Pilot

[Applications] Adhesives, Additive of epoxy-resin etc.

Acrylate derivative

TBIS®-ZPC is an acrylic monomer with a fluorene skeleton, and has high solvent solubility while achieving a high refractive index.
It also has excellent storage stability at room temperature and can be stably handled without crystallizing in solution.

Name of chemical
[product name]		StructureTypical properties, etc.Stage
TBIS®-ZPC
CAS No.2115022-49-4
Appearanceviiscous solid
Transparency T40090.40%
Refractive index1.63
* Sold in 40% toluene solution 		Pilot

[Applications] Electronic Materials, Optical Materials, Additives etc.

* We also offer examination of synthesis for various diols, diamines, acid dianhydrides, epoxy, acrylate etc.