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Accession Number ADA564024
Title Polymer Claw: Instant Underwater Adhesive.
Publication Date Aug 2012
Media Count 9p
Personal Author J. J. Benkoski
Abstract JHU/APL's Polymer Claw is a pressure-activated underwater adhesive that bonds instantly to biofouled surfaces in a single step. The key to this technology is the use of pressure sensitive microcapsules, which release reactive amine crosslinkers into an adhesive putty when pressed against the surface. The amine reacts with the sticky, isocyanate putty to form a tough polyurea. The catalyzed isocyanates likewise bond with alcohols, amines, acids, or oxides on the surface. This technology addresses the issue of biofouling through an abrasive metal brush coated with a caustic gel. Activated by water, the caustic removes plant and animal matter before the adhesive even makes contact with the surface. Pressure from the adhesive putty flattens the metal bristles and displaces the gel to make way for the adhesive. The entire system will be sealed in disposable packaging for safe storage and transport. This aggressive approach meets the Navy's requirements for speed, robust performance in all conditions, and no special training.
Keywords Adhesion
Bingham plastics
Caustic cleaning agents
Pressure activated adhesives
Pseudoplastic behavior
Rheopectic properties
Sulfuric acid

Source Agency Non Paid ADAS
NTIS Subject Category 99F - Physical & Theoretical Chemistry
99C - Polymer Chemistry
71B - Adhesives & Sealants
71Q - Solvents, Cleaners, & Abrasives
Corporate Author Johns Hopkins Univ., Laurel, MD. Applied Physics Lab.
Document Type Technical report
Title Note Progress rept. no. 6, 24 Jul-27 Aug 2012.
NTIS Issue Number 1302
Contract Number N00014-12-1-0305

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