Patent · US Active

Polyester polyols with long-chain polyether polyol building blocks and use thereof in rigid pur/pir foams

US9701805B2 · kind B2 · utility

0Cited by

4References

18Claims

0Family size

Assignee

Covestro Deutschland AG · DE

Inventors

Hartmut Nefzger · Pulheim, DE
Uwe Kuenzel · Leverkusen, DE
Lutz Brassat · Leverkusen, DE

Key dates

Filing date	Apr 8, 2014
Grant date	Jul 11, 2017
Priority date	—
Expiry date	Apr 8, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2150/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.

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