Acoustic scattering and high reflection loss compositions

Details Acoustic scattering and high reflection loss compositions Acoustic scattering and high reflection loss compositions

1989-11-20

1992-05-19

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 54, 521137, 528 60, 528 65, 528 76, 528 80, C08J 916, C08G 1832, C08G 1848

Patent

active

051149826

ABSTRACT:
An acoustic foam composition comprising (a) about 1 equivalent of a polybutadiene based polyol (b) about 2.5 to 7.5 equivalents of a diisocyante (c) or low molecular weight diol which gives a balanced stoichiometry and (d) about 1.5 to 6% by weight based on the total weight of the composition of hollow polymeric microspheres. The composition may be prepared by a one-step system or a prepolymer system. The foam compositions of the present invention has excellent acoustic properties.

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patent: 4739027 (1988-04-01), Mendelsohn
patent: 4798851 (1989-01-01), Werner et al.

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