Substrate for optical recording media and molding composition th

Details Substrate for optical recording media and molding composition th Substrate for optical recording media and molding composition th

1989-03-31

1992-05-19

Lipman, Bernard

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

Synthetic resins

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

5253317, 525338, 525339, C08F 804

Patent

active

051150417

ABSTRACT:
Substantially optically clear molding compositions comprising polymerized cycloolefin monomers (e.g., norbornene-type polymers) which, subsequent to polymerization have been hydrogenated are provided. The polymers have a weight average molecular weight of from about 37-47.times.10.sup.3.

REFERENCES:
patent: 3557072 (1971-01-01), Verne et al.
patent: 4136247 (1979-01-01), Tenney et al.
patent: 4136248 (1979-01-01), Tenney
patent: 4136249 (1979-01-01), Tenney et al.
patent: 4178424 (1979-12-01), Tenney et al.
Chemical Abstrct 107:9784n. Acrylic Polymers for Optical Materials (1988).

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