Process for the preparation of nylon 4,6
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United States of America Patent
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-
Feb 2, 1988
Issued Date -
N/A
app pub date -
Jul 25, 1986
filing date -
May 31, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A reproducible method for the preparation of high molecular weight white poly(tetramethyleneadipamide) nylon 4,6 using moderate temperatures and relatively short reaction times is disclosed. In the method, the prepolymerization step is limited under controlled reaction conditions so that a prepolymer is formed with a very low degree of polymerization, whereby a shorter, commercially viable, after-condensation time is achieved to obtain a high molecular weight final poly-condensation polymer product.
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