Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1992-01-08
1993-03-02
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528324, 5283291, 528338, 528339, 528340, C08G 6928
Patent
active
051910608
ABSTRACT:
A process of preparing homopolymers and copolymers of dodecane terephthalamide having a high melting temperature and dimensional stability, comprising the steps of forming an aqueous suspension of a prepolymer comprising substantially equimolar diacid/diamine admixture of 1,12-dodecanediamine, terephthalic acid, and optionally at least one additonal comonomer in a reactor at a reaction temperature below the melting temperature of the resulting polyamide polymer; drying the prepolymer; and polycondensating the dried prepolymer in an extruder, particularly a vented single screw extruder, to form the polyamide polymer.
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Akkapeddi Murali K.
Cummings Michael F.
Dege Gerald J.
Allied Signal
Anderson Harold D.
Criss Roger H.
Lee Michael U.
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