Cleaning solutions for removing uncured polyester resin systems from the surfaces of processing equipment
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United States of America Patent
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Jan 3, 1995
Grant Date -
N/A
app pub date -
Aug 12, 1993
filing date -
Aug 12, 1993
priority date (Note) -
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Abstract
Uncured polyester resins are removed from the surfaces of processing equipment, e.g. mixing and injection heads, by a cleaning solution comprising: A. At least about 50 weight percent of at least one dibasic acid ester, such as DBE; B. A sufficient amount of at least one free radical polymerization inhibitor, e.g. hydroquinone, to inhibit the cure of the polyester resin system; and C. A sufficient amount of at least one chelating agent, e.g. tartaric acid, to inhibit the promotional effects of the metal-ion promoter of the free radical polymerization catalyst system.
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