Accession Number : ADD016103

Title :   Method for Bonding a Polyurethane Molding Composition to a Cable Jacket of and OLEFIN/ESTER Interpolymer.

Descriptive Note : Patent, Filed 23 Sep 92, patented 26 Oct 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ramotowski, Thomas S

Report Date : 26 Oct 1993

Pagination or Media Count : 8

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 there-about 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 over-molding on the jacket.

Descriptors :   *CABLES, *ESTERS, *PATENTS, *CHEMICAL BONDS, *JACKETS, *POLYURETHANE RESINS, *MOLDING MATERIALS, ALKALI METALS, CHAINS, CURING, HYDROXIDES, LENGTH, METALS, ORGANIC ACIDS, PRIMERS, ROOM TEMPERATURE, SUBSTITUTES, SURFACES, TEMPERATURE, URETHANES, WATER, ELECTRIC CABLES, POLYMERS, RESISTANCE, SEALING COMPOUNDS, HYDROLYSIS, HYDROXYL RADICALS, ISOCYANATES, COATINGS

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Coatings, Colorants and Finishes
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE