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Polyamides

Patent Abstracts

From 08/29/2014 through 8/11/2012   

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Patents with Abstracts

8,232,337 
Polyamide compositions with improved salt resistance and heat stability 
 
Doshi, Mathew and Martens of DuPont, Delaware, developed a polyamide including at least one semi-aromatic copolyamide, said semi-aromatic copolyamide consisting essentially of about 25 to about 55 mole percent repeat units of the formula --C(O)(CH2)mC(O)NHCH2ArCH2NH-- (I) and about 45 to about 75 mole percent repeat units of the formula --C(O)(CH2)mC(O)NH(CH2)nNH-- (II) wherein m is 8, 10, and/or 12, n is 6, 10 and/or 12 and Ar is a meta-substituted benzene ring; and said polyamide has a melting point equal to or less than 225 C.; and 0.1 to 15 wt% of one or more polyhydric alcohols having more than two hydroxyl groups and having a number average molecular weight (M.sub.n) of less than 2000. (RDC 8/11/2012)

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Roger D. Corneliussen
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 5/16/2012.