Titanium dioxide nucleating agent systems for foamable polymer compositions
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United States of America Patent
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-
Jan 14, 2003
Grant Date -
Oct 17, 2002
app pub date -
Apr 17, 2002
filing date -
Sep 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns nucleating agent systems for foamable polymer compositions, preferably fluoropolymer resins, having foam cell nucleation sites using titanium dioxide based nucleating agents, and foamable polymers comprising the nucleating agents. The nucleating agent systems comprise TiO.sub.2, certain inorganic salts, and, optionally, sulfonic acid salts and/or phosphonic acid salts. The invention also concerns foamable composition concentrates and foamed thermoplastic insulation material comprising fluoropolymer and the nucleating agent systems.
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