Patent · US Expired

Process for preparing macrocyclic polyesters

US5446122A · kind A · utility

30Cited by
4References
9Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 30, 1994
Grant dateAug 29, 1995
Priority date—
Expiry dateNov 30, 2014

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G63/85
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

A method for making macrocyclic polyesters comprises the steps of supplying heat and contacting bis-hydroxyalkyl-terminated diesters or oligomers thereof with high boiling point solvents and esterification catalysts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.