Accession Number : ADD001127

Title :   Low Density Resin Composite of High Stiffness.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Legally,Paul

Report Date : 14 Jan 1975

Pagination or Media Count : 5

Abstract : An object of this invention is to provide low density, high yield strengths, thermosetting resins having viscosity and cure characteristics suitable for the fabrication of castable plastic materials under the conditions of vacuum potting. A further object of this invention is to provide a method of manufacturing low density polydiene resins having higher yield strengths. These and other objects of this invention are accomplished by providing a resin which is produced by contacting (A) a difunctional polydiene prepolymer having (1) two terminal functional groups selected from the group consisting of hydroxyl and carboxyl and (2) a predominant amount of vinyl groups on alternate carbon atoms of the polydiene backbone, with (B) a chain extender, provided that when the terminal functional groups on the polydiene are hydroxyl groups, the chain extender is a diisocyanate.

Descriptors :   *Patents, *Olefin polymers, Embedding substances, Casting, Dienes

Subject Categories : Polymer Chemistry
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE