Process for manufacturing polyamides

Details Process for manufacturing polyamides Process for manufacturing polyamides

2006-02-07

2006-02-07

Hightower, P. Hampton (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S312000, C528S322000, C528S332000, C528S335000, C528S336000, C528S338000, C528S339000, C528S340000, C528S480000, C528S491000, C528S499000

Reexamination Certificate

active

06995233

ABSTRACT:
The invention relates to a continuous process for manufacturing polyamides. The polyamides are of the type obtained from diacids and diamines. The process comprises an operation of continuous mixing of a compound which is rich in amine end groups and a compound which is rich in acid end groups and a polycondensation operation using the mixture. The invention relates to the starting phase of such a process, during which an aqueous solution comprising a mixture of monomers in substantially stoichiometric proportions is used.

REFERENCES:
patent: 5339255 (1994-08-01), Suzuki et al.
patent: 5532487 (1996-07-01), Brearley et al.
patent: 5665854 (1997-09-01), Kosinski et al.
patent: 5674974 (1997-10-01), Brearley et al.
patent: 6169162 (2001-01-01), Bush et al.
patent: 6327521 (2001-12-01), Prober
patent: 6489435 (2002-12-01), Tanaka et al.
patent: 6610816 (2003-08-01), Kurose et al.
patent: 6696544 (2004-02-01), Thierry et al.

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