Method for producing transparent plastic article
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United States of America Patent
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Jan 8, 1991
Issued Date -
N/A
app pub date -
Dec 29, 1988
filing date -
Dec 3, 1985
priority date (Note) -
Expired
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Abstract
A transparent plastic article with less internal strain is produced by successively polymerizing a monomer part by part with forming a gel state part between the already polymerized part and the unpolymerized part, or by polymerizing a monomer by means of a mold which can follow cure shrinkage of the monomer in order to decrease cure shrinkage. The article produced is particularly suitable for optical applications such as an optical disc, a lens and a prism.
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