Resin composition for spacers of information recording disc

Details Resin composition for spacers of information recording disc Resin composition for spacers of information recording disc

1988-07-27

1990-07-24

Ivy, C. Warren

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524497, 524553, 524551, 523174, 430 18, 428 66, 3461351, C08G 5950, C08G 5922

Patent

active

049436112

ABSTRACT:
A resin composition for spacers of an information recording disc which comprises: (A) a random copolymer of ethylene and at least one cycloolefin having an intrinsic viscosity [.eta.] of from 0.05 to 10 dl/g, as measured in decalin at a temperature of 135.degree. C., and (B) from 0.01 to 5 parts by weight, based on 100 parts by weight, of said copolymer A, of an inorganic particles such as titania and silica having a particle size of not more than 300 .mu.m. Spacers made of the composition described herein can be welded to disc substrates within a shortened period of ultrasonic vibration to produce an information recording disc having a reduced warp angle.

REFERENCES:
patent: 4720715 (1988-01-01), Omae

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