Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2005-07-12
2005-07-12
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, C528S323000, C528S332000, C528S335000, C528S336000, C528S480000, C528S483000, C528S503000
Reexamination Certificate
active
06916901
ABSTRACT:
The present invention provides a method for the production of polyamide 6 by the hydrolytic polymerization of ε-caprolactam, in which, in the first step, caprolactam ring opening occurs under the action of water and, in the following steps, polycondensation is performed at low temperatures under anhydrous conditions.
REFERENCES:
patent: 4204049 (1980-05-01), Matthies et al.
patent: 4327208 (1982-04-01), Lehr et al.
patent: 4540774 (1985-09-01), Gerking et al.
patent: 4540779 (1985-09-01), Conrad et al.
patent: 4734263 (1988-03-01), Gerking et al.
patent: 5543495 (1996-08-01), Anolick et al.
patent: 5659009 (1997-08-01), Pipper et al.
patent: 5696227 (1997-12-01), Mumcu
patent: 6258926 (2001-07-01), Wiltzer et al.
patent: 6566487 (2003-05-01), Buijs et al.
patent: 6710159 (2004-03-01), Morhenn et al.
patent: 227 140 (1985-09-01), None
patent: 234 430 (1986-04-01), None
patent: 43 02 764 (1994-08-01), None
Gestermann Sven
Ulrich Ralph
Bayer Aktiengesellschaft
Denesvich Jill
Hampton Hightower P.
LandOfFree
Production of polyamide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of polyamide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of polyamide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3421347