C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 65/00 (2006.01)
Patent
CA 2704744
This invention relates to a process for preparing polytrimethylene ether glycols or copolymers thereof by a polycondensation reaction using at least one acid catalyst, wherein the temperature of the reaction is controlled such that the average temperature during the first half of the reaction is higher than the average temperature during the second half of the reaction.
Cette invention concerne un procédé de préparation de polytriméthylène éther glycols ou de copolymères associés par une réaction de polycondensation utilisant au moins un catalyseur acide, la température de la réaction étant contrôlée de sorte que la température moyenne pendant la première moitié de la réaction soit supérieure à la température moyenne pendant la seconde moitié de la réaction.
Confer David C.
Harmer Mark Andrew
Hoffmann Christian
Jackson Scott Christopher
Kristjansdottir Sigridur Soley
E.i. Du Pont de Nemours And Company
Torys Llp
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