company tower banner
Hexcel Company Logo
HexPly® 996 is a 350ºF (177ºC) curing cyanate siloxane resin with a 330ºF (165ºC) glass transition temperature. Standard cure is two hours at 350ºF (177ºC). HexPly® 996 can be autoclave and press cured. HexPly® 996 can be impregnated on all available fibers and fabrics. The recommended lay-up procedure for HexPly® 996 is HSP-L3. The recommended cure procedure is HSP-C1 or HSP-C6. Typical applications for HexPly® 996 are primary and secondary space structures where the optimum dimensional stability and lowest moisture absorption are required.

Polymer Name: Siloxane Polymer

Functions: Prepreg

Processing Methods: Prepreg Processing

Technical Data Sheet
  • TypeDocument Name
View All Documents

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Polymer Name
Composite Materials Functions

Features & Benefits

Materials Features
Product Highlights
  • Lowest moisture absorbing cyanate resin system available
  • Attractive electrical properties
  • Good dimensional stability
  • 350ºF (177ºC) cure
  • Available in a broad range of reinforcements for both tapes and fabrics
  • Good microcracking resistance
  • Low outgassing

Applications & Uses

Composites Processing Methods

Properties

Physical Form
Neat Resin Properties
ValueUnitsTest Method / Conditions
Tensile Strength7.4 (51)ksi (Mpa)
Tensile Modulus0.43 (3.0)Msi (Gpa)
Strain1.7%
Compression Strength19.1 (132)ksi (Mpa)
Flexural Strength11.0 (76)ksi (Mpa)
Flexural Modulus0.47 (3.2)Msi (Gpa)
G1C2.36in-lbs/in2
Density1.146g/cc
Tg, (RDS Torsion G1) ºC169