Moisture Resistant Primer for Composite Bonded Repairs

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX09CB15C
Agency Tracking Number: 075078
Amount: $600,000.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: 2007
Solicitation Topic Code: A1.01
Solicitation Number: N/A
Small Business Information
9621 Camino Del Sol NE, Albuquerque, NM, 87111-1522
DUNS: 859106296
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Andrea Hoyt Haight
 Principal Investigator
 (505) 346-1685
 adherenttech@comcast.net
Business Contact
 Susan Switzer
Title: Business Official
Phone: (505) 346-1685
Email: adherenttech@comcast.net
Research Institution
N/A
Abstract
Aging and durability of aircraft in both the military and civilian sectors are becoming major issues as the existing fleet continues to age. Additionally, the increased use of composite structures in the civilian fleet, such as in the Boeing 787 Dreamliner and the Airbus A380, make the understanding and/or improvement of composite durability, particularly durability of repairs, even more critical. Several areas have been identified as targets for improvement in composite aircraft repair. These include the development of rapid, low temperature repair methods and associated materials as well as development of the quality of repairs when they are made. Adhesion of bonded repairs is one area that needs to be addressed. In the Phase I program Adherent Technologies, Inc. demonstrated a novel moisture-resistant primer system for use in repairs of standard carbon/epoxy composites used in many subsonic aircraft. Our proprietary chemistry comprised of a reactive coupling agent and a carrier resin compatible with standard aerospace epoxy resins bonds directly to the prepared aircraft composite surface while retaining residual functionality that can be cured directly into the matrix of the repair leading to a covalently bound repair, thereby strengthening the repair interface. An increase in bond strength for primed samples relative to unprimed control specimens was noted; the improvement in the fracture toughness of the bonds was particularly of note. The Phase II effort will focus on the optimization of these primer systems and associated application and activation methods. Water-based systems will also be developed and demonstrated.

* Information listed above is at the time of submission. *

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