Accession Number : ADD015627

Title :   Method for Bonding a Polyurethane Molding Composition to a Cable Jacket of an Olefin/Ester Interpolymer.

Descriptive Note : Patent Application, Filed 23 Sep 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ramotowski, Thomas S

Report Date : 23 Sep 1992

Pagination or Media Count : 19

Abstract : A room temperature curing polyurethane composition is bonded to the surface of cables having jackets of an olefin/ester interpolymer to provide a water resistant seal thereabout by first exposing the surface of a length of cable to an alkali metal hydroxide solution to hydrolyze the functional ester groups and thereby substitute hydroxyl groups for the organic acid of the ester in the interpolymer at the surface of the jacket. A diisocyanate primer is applied to the treated surface and it interacts with the hydroxyl groups to produce pendant reactive groups. A room temperature curing urethane prepolymer composition is then molded about the primed surface at ambient temperatures and the unreacted hydroxyl groups along the urethane prepolymer chain react with the pendant reactive groups of the jacket to produce a firmly bonded overmolding on the jacket.

Descriptors :   *CABLES, *ESTERS, *JACKETS, *PATENT APPLICATIONS, *OLEFIN POLYMERS, *BONDING, *MOLDING MATERIALS, *PROTECTIVE COATINGS, ACIDS, ALKALI METALS, CHAINS, CURING, HYDROXIDES, LENGTH, METALS, ORGANIC ACIDS, PRIMERS, ROOM TEMPERATURE, SUBSTITUTES, SURFACES, TEMPERATURE, URETHANES, WATER, POLYMERS, RESISTANCE, SEALING COMPOUNDS, HYDROXYL RADICALS, ISOCYANATES, COMPOSITION(PROPERTY), ELECTRICAL EQUIPMENT, SMOKE, COMBUSTION

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Adhesives, Seals and Binders
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE