Process For The Preparation Of Polyamides In The Presence of a Phosphonate
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United States of America Patent
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Issued Date -
Feb 11, 2010
app pub date -
Jun 28, 2006
filing date -
Jul 7, 2005
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Abandoned
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Abstract
The invention relates to the preparation of polyamides in the presence of a phosphonate, which is already added at the beginning of the polycondensation or polyaddition process. The resulting prepolymer exhibits a high molecular weight and is almost colorless. A further aspect of the invention is the use of a phosphonate for increasing the molecular weight and modification of polyamides during polycondensation.
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