Build-up suppressor agents, compositions containing them and method of use in polymerization processes
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United States of America Patent
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May 15, 2001
Grant Date -
N/A
app pub date -
Jun 3, 1999
filing date -
Dec 4, 1996
priority date (Note) -
Expired
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Abstract
The invention relates to build-up agents which comprise a condensation product among an aldehyde, a phenol compound and an aromatic carboxylic acid, hydroxy-substituted on the aromatic nucleus. The products are particularly effective in reducing or suppressing the build-up formation in the polymerization of vinyl chloride or vinyl acetate, other copolymerizable substances being optionally present. Further objects of the invention are compositions containing the above agents, their use as build-up agents, methods for their preparation and the products obtained therefrom, the polymerization processes carried out in reactors whose inner walls are coated with these agents and polymers obtained from these process.
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