Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1990-04-10
1991-07-09
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
5283291, C08G 6914
Patent
active
050307100
ABSTRACT:
Novel modified nylon-6 may be produced by using a combination of one or more dicarboxylic acids and triethylene glycol diamine and tetraethylene glycol diamine, but not a diethylene glycol diamine. A dicarboxylic acid/polyethylene glycol diamine salt may be reacted with .epsilon.-caprolactam to provide the modified nylon-6. The diamines have the formula NH.sub.2 --(CH.sub.2 CH.sub.2 O).sub.x --CH.sub.2 CH.sub.2 --NH.sub.2, where x ranges from 2 to 3. Surprisingly, the suitable diamines include triethylene glycol diamine (x=2; JEFFAMINE.RTM. EDR-148 Amine) and tetraethylene glycol diamine (x=3; JEFFAMINE.RTM. EDR-192 Amine), but not closely related bis-aminoethyl ether (x=1; BAEE). Unexpectedly, BAEE, which only differs from JEFFAMINE EDR-148 Amine by one --13 (CH.sub.2 CH.sub.2 O)--group, did not give satisfactory product--the fibers were too weak. The resulting modified nylon-6 polymers of the invention, however, including fibers therefrom, have improved water absorbancy properties and greater flexibility. Polyamide products with a wide range of water adsorbancies may be obtained by adjusting the amount of amide.
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Speranza George P.
Su Wei-Yang
Anderson Harold D.
Mossman David L.
Park Jack H.
Priem Kenneth R.
Texaco Chemical Company
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