Ivory-like key material and a method for producing the same

Details Ivory-like key material and a method for producing the same Ivory-like key material and a method for producing the same

1988-12-28

1990-10-02

Lieberman, Allan M.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523334, C08L 702, C08L 910, C08L 5102, C08L 8900

Patent

active

049608053

ABSTRACT:
In production of a casein-type artificial key material for keyboard musical instruments, fine grains of an elastomer such as polyurethane elastomer are added to a mixture to be kneaded together so that, in the structure of the product, islanded elastomer is uniformly dispersed in the matrix of casein. Inbred brittleness of casein is much improved by inclusion of the elastomer and strong bond between casein and the elastomer well removes the danger of interface separation.

REFERENCES:
patent: 4447268 (1984-05-01), Oshima
patent: 4508575 (1985-04-01), Oshima
Abstract of Japanese Patent No. 57-96046, 6/82, Oshima.
Abstract of Japanese Patent No. 59-52613, 3/84, Oshima.
"CASEIN Its Preparation, Chemistry and Technical Utilization" by E. L. Taque, pp. 152-165.

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