Polyurethane-acrylic interpenetrating polymer network acoustic d

Details Polyurethane-acrylic interpenetrating polymer network acoustic d Polyurethane-acrylic interpenetrating polymer network acoustic d

1991-08-28

1994-07-12

Kight, III, John

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

Synthetic resins

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

525454, 525455, 525903, C08F 830

Patent

active

053289579

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 percent by weight of the material, is made by polymerizing an aromatic diisocyanate with a polyalkylene ether glycol, and the hard polymer component is an acrylic polymer made by polymerization of the alkyl esters and alkylene diesters of acrylic and/or methacrylic acid, e.g. n-butyl methacrylate and tetramethylene glycol dimethacrylate. The curing of the mixture is carried out at room temperature.

REFERENCES:
patent: 3894169 (1975-07-01), Miller
patent: 3941725 (1976-03-01), Schmittes et al.
patent: 4302553 (1981-11-01), Frisch et al.
patent: 4613543 (1986-09-01), Dabi
patent: 4766183 (1988-08-01), Rizk et al.

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