Preparation of polytrimethylene ether glycol and copolymers...

Details Preparation of polytrimethylene ether glycol and copolymers... Preparation of polytrimethylene ether glycol and copolymers...

2007-07-03

2007-07-03

Page, Thurman K. (Department: 1621)

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

Synthetic resins

From organic oxygen-containing reactant

C568S840000

Reexamination Certificate

active

11525609

ABSTRACT:
The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof.

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patent: 2005/0272911 (2005-12-01), Okoshi et al.
patent: WO 00/10953 (2000-03-01), None
Koshar et al., “Preparation of β-H-Perfluoro Alkanesulfonic Acids”. J. Am. Chem. Soc. (1953) 75: 4595-4596.
Wasserscheid & Keim, “Ionic Liquids—New ‘Solutions’ for Transition Metal Catalysis”, Angew. Chem. Int. Ed. (2000) 39:3772-3789).
Sheldon, “Catalytic Reactions in Ionic Liquids”, Chem. Commun. 2001, pp. 2399-2407.

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