Process for preparing a substrate for optical recording media

Details Process for preparing a substrate for optical recording media Process for preparing a substrate for optical recording media

1986-06-10

1988-05-10

Schofer, Joseph L.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

264106, 26433122, B29D 1100

Patent

active

047434090

ABSTRACT:
A process for preparing a substrate for optical recording media which comprises injection-molding a polyvinylacetal resin resulting from acetalization of polyvinylalcohol to a degree of at least 60 mole % with at least one acetalizing agent selected from the group consisting of aliphatic aldehydes, alicyclic aldehydes, aromatic aldehydes and heterocyclic aldehydes.

REFERENCES:
patent: 3926918 (1975-12-01), Shibata et al.
patent: 3963618 (1976-06-01), Muir

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