Interpenetrating polymer network acoustic damping material

Details Interpenetrating polymer network acoustic damping material Interpenetrating polymer network acoustic damping material

1991-08-28

1993-07-06

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 28, 525131, 525455, 525903, 528 75, 528 76, 528112, C08F 1804

Patent

active

052254984

ABSTRACT:
Improved acoustic damping materials comprise interpenetrating polymer netks having a soft polymer component and a hard polymer component. The soft polymer component, constituting from 50 to 90, preferably 70, percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is a vinyl ester polymer made by polymerization of a vinyl ester resin such as the acrylate or methacrylate ester of the diglycidyl ether of a polyphenol. Optionally, the vinyl ester resin may be brominated, whereby increased fire retardance is conferred upon the interpenetrating polymer network. The mixture is cured at room temperature.

REFERENCES:
patent: 4532316 (1985-07-01), Henn
patent: 4824919 (1989-04-01), Baker et al.
patent: 4857579 (1989-08-01), Domeier
patent: 5102924 (1992-04-01), Williams et al.
patent: 5110867 (1992-05-01), Schutyser et al.

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