Invention Grant
- Patent Title: Preparation of polytrimthylene ether glycol or copolymers thereof
- Patent Title (中): 聚三亚甲基醚二醇或其共聚物的制备
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Application No.: US12262626Application Date: 2008-10-31
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Publication No.: US08148491B2Publication Date: 2012-04-03
- Inventor: David C. Confer , Mark Andrew Harmer , Christian Hoffmann , Scott Christopher Jackson , Sigridur Soley Kristjansdottir , Rupert Spence
- Applicant: David C. Confer , Mark Andrew Harmer , Christian Hoffmann , Scott Christopher Jackson , Sigridur Soley Kristjansdottir , Rupert Spence
- Applicant Address: US DE Wilmington
- Assignee: E I du Pont de Nemours and Company
- Current Assignee: E I du Pont de Nemours and Company
- Current Assignee Address: US DE Wilmington
- Main IPC: C08F6/06
- IPC: C08F6/06 ; C08F6/12 ; C08J3/11 ; C08G65/34
Abstract:
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.
Public/Granted literature
- US20090118465A1 PREPARATION OF POLYTRIMTHYLENE ETHER GLYCOL OR COPOLYMERS THEREOF Public/Granted day:2009-05-07
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