Patent · US Expired

End capped polyalkylene carbonates having improved thermal stability

US4066630A · kind A · utility

30Cited by

7References

15Claims

0Family size

Assignee

AIR PRODUCTS AND CHEMICALS, INC. · US

Inventors

Dale D. Dixon · Kutztown, US
Michael E. Ford · Center Valley, US
Gerald J. Mantell · Allentown, US

Key dates

Filing date	Jan 10, 1977
Grant date	Jan 3, 1978
Priority date	—
Expiry date	Jan 10, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G64/34
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polycarbonates, of the type formed by reacting an aliphatic or cycloaliphatic 1,2-monoepoxide with carbon dioxide and having substantially alternating units of epoxide and carbon dioxide, are improved in thermal stability by reacting the free hydroxyl groups thereon with a hydroxyl reactive organic compound.

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