Sound dampened automotive enclosure such as an oil pan

Details Sound dampened automotive enclosure such as an oil pan Sound dampened automotive enclosure such as an oil pan

1987-10-01

1989-07-25

Robinson, Ellis P.

Stock material or miscellaneous articles

Hollow or container type article

Glass, ceramic, or sintered, fused, fired, or calcined metal...

181204, 181290, 220453, 428158, 428160, 428198, 4283175, 4284258, 428457, 428461, 428 359, B65D 9004, E04B 182

Patent

active

048512710

ABSTRACT:
The invention concerns constrained layer sound damping. A composition and a laminated structure are provided for the reduction of noise coming from housings such as oil pans for automobiles. The composition comprises a rubbery polyurethane, an olefin polymer, and a filler. The laminated structure comprises the housing, the composition, and a sheet metal liner. The composition contains a blowing agent which is activated to provide a single unitary structure which dampens noise. The polyurethane and olefin polymer are thoroughly intermixed with each other, but maintain their separate identities in the blend.

REFERENCES:
patent: 2871218 (1959-01-01), Schollenberger
patent: 3489242 (1970-01-01), Gladding et al.
patent: 3558538 (1971-01-01), Wellrab et al.
patent: 4315971 (1982-02-01), Taylor
patent: 4367259 (1983-01-01), Fulmer et al.

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