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CYTESTER™ (Cyanate Ester Monomer)

CYTESTER™ is a thermosetting resin containing –OCN groups. By repeating cyclotrimerization of three –OCN groups, cyanate esters form three-dimensional network polymers linked by triazine rings.

The polymers of CYTESTER™ possess excellent thermal and electrical properties. In addition, they can be modified by formulation with other thermosetting resins such as epoxies, maleimides and benzoxazines.

Structure and Curing Mechanism of CYTESTER™

  • Properties of Cyanate Ester Monomers
    • Low Melt Viscosity
    • Good Solubility in Common Solvents
    • Compatible with Other Resins
  • Properties of Cured Resins
    • High Tg
    • Low Thermal Expansion
    • Low Dk, Df
    • Good Electrical Insulation

Main Applications

  • Electronic Materials: Printed Wiring Boards for high frequency devices, Thermal Conductive Materials, etc.
  • Structural Materials: FRPs, Adhesives, etc.

Properties of Homopolymers of CYTESTER™

  Unit CYTESTER™
TA
(Standard Grade)
TA-100
(R&D Grade)
TA-1500
(R&D Grade)
P-201
(R&D Grade)
Anhydride
Epoxy Resin
System*1
(Reference)
Feature   Standard TA Prepolymers Liquid at
Room
Temputure
-
Melt Viscosity
(40℃)
mPa·s Solid Viscous Liquid Solid 28 -
Melt Viscosity
(80℃)
13 660 71300 9 -
Tg*2 325 330 325 296 150
CTEα1*3 ppm/℃ 54 50 50 53 72
Flexural
Strength*4
MPa 136 110 122 127 126
Flexural
Modulus*4
GPa 2.8 2.9 2.9 2.6 2.8
  • *1 DGEBF(curing egent Me-HHPA)
  • *2 DMA
  • *3 ASTM D696
  • *4 ASTM D790
Curing Conditions
150℃/3h+180℃/5h+250℃/3h (TA, TA-100, TA-1500, P-201)
100℃/1h+150℃/3h(Epoxy Resin)

All data are typical data and not guaranteed.

Inquiries Concerning Products

Basic Chemicals Business Sector
High-performance Products Division
Polymer Materials Department
TEL:+81-3-3283-4800 / FAX:+81-3-3214-0938