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1. (WO1992010526) PROCESS FOR INCREASING THE RELATIVE VISCOSITY OF POLYAMIDES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/010526 International Application No.: PCT/US1991/008929
Publication Date: 25.06.1992 International Filing Date: 05.12.1991
Chapter 2 Demand Filed: 12.06.1992
IPC:
C08G 69/48 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
69
Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
48
Polymers modified by chemical after-treatment
Applicants:
E.I. DU PONT DE NEMOURS AND COMPANY [US/US]; 1007 Market Street Wilmington, DE 19898, US
Inventors:
BUZINKAI, John, Francis; US
DEWITT, Marion, Rollins, Jr.; US
WHELAND, Robert, Clayton; US
Agent:
HENDRICKSON, John, S. ; E.I. du Pont de Nemours and Company Legal/Patent Records Center 1007 Market Street Wilmington, DE 19898, US
Priority Data:
623,26305.12.1990US
Title (EN) PROCESS FOR INCREASING THE RELATIVE VISCOSITY OF POLYAMIDES
(FR) PROCEDE D'AUGMENTATION DE LA VISCOSITE RELATIVE DE POLYAMIDES
Abstract:
(EN) A process for increasing the relative viscosity of a polyamide includes heating the polyamide in the presence of a base and a catalyst with the catalyst being at least one compound of the formula X-(CH2)nPO3R2, wherein X is 2-pyridyl, 4-morpholino, 1-pyrrolidino, 1-piperidino or R'2-N- wherein R' is an alkyl group having between 1 and 12 carbon atoms; n is an integer from 2 to 5; and R, being the same or different, is H or an alkyl group having between 1 and 12 carbon atoms.
(FR) Procédé d'augmentation de la viscosité relative d'un polyamide, consistant à chauffer le polyamide en présence d'une base et d'un catalyseur, celui-ci étant au moins un composé de formule X-(CH2)nPO3R2, dans laquelle X est 2-pyridyle, 4-morpholino, 1-pyrrolidino, 1-pipéridino ou R'2-N-, où R' est un groupe alkyle possédant entre 1 et 12 atomes de carbone; n est un nombre entier compris entre 2 et 5; et R, qui est identique ou différent, représente H ou un groupe alkyle comportant entre 1 et 12 atomes de carbone.
Designated States: AU, JP, SU
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, MC, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0560933RU02086574AU1991091477