Process for the formation of urethane via transcarbamation
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United States of America Patent
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Feb 14, 2006
Grant Date -
Mar 4, 2004
app pub date -
Oct 11, 2001
filing date -
Oct 13, 2000
priority date (Note) -
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Abstract
The invention concerns a novel catalyst for forming urethanes. Said catalyst is characterized by the general formula: MY3-q[Z]q, wherein: Z is the radical corresponding to the anion of a super acid whereof the Hamett constant is at least equal to 13 and advantageously more than 13, M representing a trivalent metal, preferably known for forming Lewis acids; Y is an anion or a monovalent anionic function; and q is an integer selected advantageously between 1 and 3, inclusively. The invention is applicable to paint.
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