Accession Number : ADA570697

Title :   Polymer Claw: Instant Underwater Adhesive

Descriptive Note : Progress rept. no. 7, 27 Aug-24 Sep 2012

Corporate Author : JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB

Personal Author(s) : Benkoski, Jason J

Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a570697.pdf

Report Date : 24 Sep 2012

Pagination or Media Count : 8

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.

Descriptors :   *ADHESIVES , *FOULING , *UNDERWATER , ADHESION , AMINES , CAUSTICS , CROSSLINKING(CHEMISTRY) , CURING , FORCE(MECHANICS) , FOULING ORGANISMS , FRACTURE(MECHANICS) , POLYMERS , PRESSURE TRANSDUCERS , PROTOTYPES , RHEOLOGY , SULFURIC ACID

Subject Categories : Biology
      Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE