Title:
ポリトリメチレンエーテルグリコールおよびそのコポリマーの生成
Document Type and Number:
Japanese Patent JP4786847
Kind Code:
B2
Abstract:
A process for the manufacture of polytrimethylene ether glycol comprising the steps of: (a) providing (1) 1,3-propanediol reactant selected from the group consisting of 1,3-propanediol and/or oligomers or prepolymers of 1,3-propanediol having a degree of polymerization of 2-9 and mixtures thereof, and (2) a polycondensation catalyst; and (b) polycondensing the 1,3-propanediol reactant to form a polytrimethylene ether glycol at less than one atmosphere pressure, and the product of the process. In addition, polytrimethylene ether glycol has a number average molecular weight greater than 1,500, an APHA color of less than 120, an unsaturation of less than 20 meq/kg, and a content of cyclic ether oligomers of less than 2%.
Inventors:
Haribee. Sankara
Leo E. Manzer
Leo E. Manzer
Application Number:
JP2001544831A
Publication Date:
October 05, 2011
Filing Date:
December 15, 2000
Export Citation:
Assignee:
E.I.DU PONT DE NEMOURS AND COMPANY
International Classes:
C08G65/34; C07C41/09
Domestic Patent References:
| JPH06503113A | 1994-04-07 | |||
| JPH02248426A | 1990-10-04 |
Foreign References:
| US3326985A | 1967-06-20 |
Attorney, Agent or Firm:
Patent Business Corporation Tani/Abe Patent Office
Shigeyoshi
Tamura Tadashi
Shigeyoshi
Tamura Tadashi