Print Version (PDF) [ close ]   

Technical Data Sheet


Re-issued September 2001



EPON™ Resin 164 / EPON Resin 165



Product Description

EPON™ Resins 164 and 165 are solid multifunctional cresol novolac epoxy resins (see molecular structure). These resins combine the high thermal stability of the cresol novolac backbone with the versatility, reactivity and chemical resistance of epoxy resins. They are used where improved properties of cured epoxy resin systems are needed, particularly at elevated temperature and where stability of electrical properties under humid conditions is required. They find application in electrical laminates, molding compounds, high-performance aerospace composites, high- temperature adhesives, powder coatings and tooling.


EPON 164 and 165 Structure

                                                            Where n equals an average of 3-4



  • An average of five to six reactive epoxide groups per molecule
  • Low ionic contaminants
  • Low saponifiable chlorine
  • Easily ground into uniform particle size
  • Low melt viscosity
  • Good storage stability


Sales Specification










Test Method/Standard

Epoxide Equivalent Weight


200 – 240

200 – 230

ASTM D1652

Viscosity at 25°C 1


35 – 50



Viscosity at 130°C



100 – 200




6 max.

6 max.

ASTM D1544






1 Measured on a 60% weight solution in MEK


Typical Properties










Test Method/Standard

Saponifiable chlorine

% wt.

0.03 – 0.07

0.15 max.


ICI melt viscosity at 150°C


9 – 14

30 – 50


Melt point


80 – 85

90 – 100


Epoxy functionality





Density 1










1 Powder Coating Institute, PCI Recommended Test Procedure #4.



Benefits of using EPON Resins 164 and 165

The use of EPON Resins 164 and 165 in epoxy resin formulations helps to increase resistance to attack by moisture, solvents and other environmental exposures. In addition they bring higher glass transition temperature and cross-link density to cured systems which provides improved retention of strength, rigidity, electrical and other properties at elevated temperatures.


EPON Resins 164 and 165 are easily ground into powders or blended with other epoxy resins. They are compatible with most materials used with Bisphenol A (BPA) based epoxies, and their low melt viscosity provides ease of handling and good flow characteristics.


The high functionality of EPON Resins 164 and 165 shortens cure times and improves handling and speed of production. The resins have strong adhesive properties needed for bonding both metal and non-metal structural components. Typically, systems containing these ECN resins maintain low weight loss in heat aging of the cured systems.


Performance Properties of Formulated Systems

See Hexion Technical Bulletin EPON Resin 164. Although this bulletin was written specifically for EPON Resin 164, we expect that similar systems, using EPON Resin 165, would give similar performance.



Safety, Storage & Handling

Please refer to the MSDS for the most current Safety and Handling information.


Please refer to the Hexion web site for Shelf Life and recommended Storage information.


This product is prone to "blocking" or "sintering", i.e., softening of the particles and agglomeration to a semi-solid mass, when stored at slightly elevated temperatures. Blocking does not affect the performance of the resin. This product should be stored in a cool dry place to minimize handling problems due to blocking.


Exposure to these materials should be minimized and avoided, if feasible, through the observance of proper precautions, use of appropriate engineering controls and proper personal protective clothing and equipment, and adherence to proper handling procedures. None of these materials should be used, stored, or transported until the handling precautions and recommendations as stated in the Material Safety Data Sheet (MSDS) for these and all other products being used are understood by all persons who will work with them. Questions and requests for information on Hexion Inc. ("Hexion") products should be directed to your Hexion sales representative, or the nearest Hexion sales office. Information and MSDSs on non-Hexion products should be obtained from the respective manufacturer.



Available in bulk and drum quantities.



Contact Information

For product prices, availability, or order placement, please contact customer service:


For literature and technical assistance, visit our website at:


® and ™ Licensed trademarks of Hexion Inc.


The information provided herein was believed by Hexion Inc. (“Hexion”) to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information, to comply with all laws and procedures applicable to the safe handling and use of the product and to determine the suitability of the product for its intended use. All products supplied by Hexion are subject to Hexion’s terms and conditions of sale. HEXION MAKES NO WARRANTY, EXPRESS OR IMPLIED, CONCERNING THE PRODUCT OR THE MERCHANTABILITY OR FITNESS THEREOF FOR ANY PURPOSE OR CONCERNING THE ACCURACY OF ANY INFORMATION PROVIDED BY HEXION, except that the product shall conform to Hexion’s specifications. Nothing contained herein constitutes an offer for the sale of any product.

Print Version (PDF) [ close ]