Cleaning agents for postreticulating polyurethane hot melts
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United States of America Patent
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Aug 26, 2003
Grant Date -
N/A
app pub date -
Jan 10, 2000
filing date -
Apr 29, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cleaning composition effective for removing reactive polyurethane hotmelts and reaction products thereof is presented containing (a) a non-volatile monohydroxy compound having a boiling point at normal pressure of greater than 140.degree. C., a monoamine, or mixtures thereof, and (b) a catalyst for the production of a polyurethane or a depolymerization catalyst selected from the group consisting of an alkali metal alcoholate, an alkaline earth metal alcoholate, an aluminum alcoholate, a tertiary amine and mixtures thereof. The cleaning composition removes both residues of the reactive uncrosslinked hotmelt and also adhering deposits of already reacted, crosslinked or cracked, infusible hotmelt.
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