Accession Number : ADD015653

Title :   Elastomer Blend for Sound and Vibration Damping.

Descriptive Note : Patent, Filed 4 Apr 90, patented 15 Dec 92,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Roland, Charles M ; Trask, Craig A

Report Date : 15 Dec 1992

Pagination or Media Count : 5

Abstract : An elastomer blend is provided for dissipation of mechanical and sonic energy over a broad temperature range. This blend of elastomers comprises from about 60-95% by weight of polybutadiene having more than about 90% 1,2-microstructure and a molecular weight of at least 80,000, the balance being predominantly polyisoprene having at least about 70% cis-1,4-microstructure and a molecular weight of at least 120,000. The blend has a single glass transition ranging over at least sixty Centigrade degrees.

Descriptors :   *ELASTOMERS, *GLASS, *PATENTS, *VIBRATION, *DAMPING, DISSIPATION, ENERGY, MICROSTRUCTURE, MIXTURES, MOLECULAR WEIGHT, POLYBUTADIENE, TEMPERATURE, TRANSITIONS, WEIGHT

Subject Categories : Elastomers and Rubber
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE