Soundproofing materials

• US 5,164,260 A
• Filed: 12/19/1989
• Issued: 11/17/1992
• Est. Priority Date: 12/19/1988
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Kitano, Motoi, Oku, Mitsumasa, Hamabe, Takeshi, Asakura, Eizo, Yoshinaka, Minoru
• Primary Examiner(s): Thibodeau, Paul J.
• Assistant Examiner(s): FOLLETT, ROBERT JOHN
• Application Number:
  US07/452,441
• Time in Patent Office: 1,064 Days
• Field of Search: 181/284, 106/425, 428/323, 428/338, 428/328
• US Class Current: 428/328
• CPC Class Codes: C04B 14/005 Inorganic fillers with a shape other than granular or fibrous carbon nanotubes C04B14/026
• CPC Class Codes: C04B 14/30 Oxides other than silica ferrites C04B14/363
• CPC Class Codes: C04B 14/4618 Oxides
• CPC Class Codes: C04B 2111/52 Sound-insulating materials
• CPC Class Codes: C04B 35/80 Fibres, filaments, whiskers, platelets, or the like
• CPC Class Codes: C08K 7/08 Oxygen-containing compounds
• CPC Class Codes: C22C 49/00 Alloys containing metallic or non-metallic fibres or filaments
• CPC Class Codes: E04C 5/073 Discrete reinforcing elements, e.g. fibres
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/256 Heavy metal or aluminum or compound thereof
• CPC Class Codes: Y10T 428/31605 Next to free metal
• CPC Class Codes: Y10T 428/31609 Particulate metal or metal compound-containing

Abstract

Soundproofing materials consisting essentially of zinc oxide whisker particles having a nucleus body and needle crystal portions extending radially from the central body in different plural directions. The materials may comprise a support material for supporting the zinc oxide whisker particles. Such support materials include inorganic materials such as metals, ceramics, glasses, cements, mortars and various fillers in the form of powder, flakes, fibers and the like, and organic materials such as resins, rubbers, waxes and the like. These materials are particularly suitable for sound insulation, sound proofing, vibration damping and vibration insulation.

Claims

1. A soundproofing material comprising zinc oxide whisker particles each having a nucleus body and needle crystal portions extending radially from the nucleus body in different plural directions, and a support material for supporting the whisker particles, wherein said whisker particles are dispersed in a paint or an emulsion.