Advanced Materials

Vacuum Reinforcement ofHoneycomb Core with HuntsmanFrozen Syntactic Products

Epocast® frozen epoxy syntactic patties fromHuntsman are ideal for fast, complete filling ofhoneycomb cavities using a standard vacuumbag process. This vacuum core-reinforcingmethod increases fabricating productivity andimproves the quality and structural integrity ofhoneycomb composite parts such as enginenacelle sections and aircraft acoustical panels.

Huntsman produces four frozen one-componentsyntactic materials: Epocast® 938-A2 epoxy,Epocast® 1614-A1 epoxy, Epocast® 1627 epoxyand Epocast® 1661 epoxy. Each of the productsis formulated for easy handling; patties are readyto use after a room temperature thaw. Thesoftened syntactics can be used to effectivelyreinforce even small, 1/8-inch cell sizes.

Huntsman frozen epoxy patties are high-performance materials with physicalcharacteristics such as:

Qualified to Boeing and other OEM specifications

Long, 8 –24 hour work lives

Excellent high-temperatureperformance

High compressive strength

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Vacuum Reinforcement of Honeycomb Core with Huntsman Frozen Syntactic Products

Frozen, One-Component Syntactic Systems Epocast® Epocast® Epocast® Epocast®

Properties 938-A2 1614-A1 1627 1661

Work Life, @ 77ºF after thaw, hrs. 24 8 24 8

Density, g/cc (lbs./ft3) 1.40 (88) 0.75 (47) 1.80 (112) 0.60 (37)

Service Temperature, ºF 350 350 350 350

Compressive Strength @ 77ºF, psi 25,000 14,500 30,000 9,000

Flame Retardant Yes Yes No Yes

Selected Specifications BMS 5-28, BMS 5-28, BMS 5-28, BMS 5-28 andTy 12, Cl 1 & 2, Ty 14, Cl 1 & 2 Ty 27 PW 36757-2Ty 13

CONTACT US TODAY FOR MOREINFORMATION ABOUT VACUUMREINFORCEMENT OF HONEYCOMB CORE AT 888-564-9318.

www.huntsman.com/aerospace

IMPORTANT LEGAL NOTICE: Epocast® is a registered trademark of Huntsman Corporation or an affiliate thereof in one or more, but not all,countries.

Sales of the product described herein (“Product”) are subject to the general terms and conditions of sale of eitherHuntsman Advanced Materials Americas LLC, or its appropriate affiliate including without limitation HuntsmanAdvanced Materials (Europe) BVBA, Huntsman Advanced Materials LLC, Huntsman Advanced Materials AmericasInc., or Huntsman Advanced Materials (Hong Kong) Ltd. (“Huntsman”). The following supercedes Buyer's documents.

While the information and recommendations included in this publication are, to the best of Huntsman's knowledge,accurate as of the date of publication, NOTHING CONTAINED HEREIN IS TO BE CONSTRUED AS AREPRESENTATION OR WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANYWARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, NONINFRINGEMENT OF ANYINTELLECTUAL PROPERTY RIGHTS, OR WARRANTIES AS TO QUALITY OR CORRESPONDENCE WITH PRIORDESCRIPTION OR SAMPLE, AND THE BUYER ASSUMES ALL RISK AND LIABILITY WHATSOEVER RESULTINGFROM THE USE OF SUCH PRODUCT, WHETHER USED SINGLY OR IN COMBINATION WITH OTHER SUBSTANCES.No statements or recommendations made herein are to be construed as a representation about the suitability of anyProduct for the particular application of Buyer or user or as an inducement to infringe any patent or other intellectualproperty right. Data and results are based on controlled conditions and/or lab work. Buyer is responsible to determinethe applicability of such information and recommendations and the suitability of any Product for its own particularpurpose, and to ensure that its intended use of the Product does not infringe any intellectual property rights.

The Product may be or become hazardous. Buyer should (i) obtain Material Safety Data Sheets and Technical DataSheets from Huntsman containing detailed information on Product hazards and toxicity, together with proper shipping,handling and storage procedures for the Product, (ii) take all steps necessary to adequately inform, warn and familiarizeits employees, agents, direct and indirect customers and contractors who may handle or be exposed to the Productof all hazards pertaining to and proper procedures for safe handling, use, storage, transportation and disposal of andexposure to the Product and (iii) comply with and ensure that its employees, agents, direct and indirect customers andcontractors who may handle or be exposed to the Product comply with all safety information contained in theapplicable Material Safety Data Sheets, Technical Data Sheets or other instructions provided by Huntsman and allapplicable laws, regulations and standards relating to the handling, use, storage, distribution and disposal of andexposure to the Product.

Please note that products may differ from country to country. If you have any queries, kindly contact your localHuntsman representative.

© 03/2010 Huntsman Corporation. All rights reserved.

AmericasHuntsman Advanced MaterialsAmericas Customer Service Center10003 Woodloch Forest DriveThe Woodlands, Texas 77380888-564-9318E-mail: advanced_materials@huntsman.com

Vacuum Process with Syntactic Patty*

Place thawed pattyover preparedhoneycomb panel

Add barrier to directepoxy flow

Pull vacuum on pattyto draw syntacticdown into core cells

Remove excesssyntactic

Examine panel toverify complete fillingof cells

* Also available in cartridges.

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