Expandable thermoplastic resin beads and molded foam made from the same
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United States of America Patent
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Aug 21, 2001
Grant Date -
N/A
app pub date -
Aug 27, 1999
filing date -
Jan 20, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An object of the invention is to prevent an oil from penetrating into a vessel obtained from expandable thermoplastic resin beads through molding. The above object is achieved by expandable thermoplastic resin beads whose surface or surface layer is coated or incorporated with a fluorine-containing block copolymer comprising of a fluorine-containing vinyl-type polymer segment derived from a fluorine-containing vinyl-type monomer and a lipophilic vinyl-type polymer segment derived from a lipophilic vinyl-type monomer.
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