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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.

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