Accession Number : AD0635593

Title :   PLASTICS FOR HULL VIBRATION DAMPING.

Descriptive Note : Final rept.

Corporate Author : MONSANTO RESEARCH CORP EVERETT MASS BOSTON LAB

Personal Author(s) : Gilman, Lucius ; ball,George L. ; Donovan,Paul F.

Report Date : 15 MAY 1963

Pagination or Media Count : 59

Abstract : An improved damping material was developed that more than meets the Bureau of Ships specifications for damping of steel plate 3/8 in. thick. Designated 'Improved MRC-OG4,' it is a graphite/carbon black-filled, plasticized, polyvinyl chloride/acetate copolymer. 'Improved MRC-OG4' yields greater than 9% c/c sub o over 10F and a decade of frequency in addition to providing 3% or more of c/c sub o from 32 to 85F at 0.1 to 6 kcps. Improvements of the MRC-OG4 resulted from an improved processing technique. In addition, commercial extrusion of the MRC-OG4 demonstrated the feasibility of this forming method. The MRC-OG4 formulation was modified to include processing agents. Eight brands or grades of graphite were accepted for use in the 'Improved MRC-OG4.' (Author)

Descriptors :   (*DAMPING, HULLS(MARINE)), (*HULLS(MARINE), DAMPING), (*PLASTIC COATINGS, HULLS(MARINE)), VIBRATION, MOLDINGS, SHIP PLATES, STEEL, GRAPHITE, CARBON BLACK, POLYVINYL CHLORIDE, POLYESTER PLASTICS

Subject Categories : Coatings, Colorants and Finishes
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE