Patent · US Active

Polyol system for preparing polyurethane

US11186670B2 · kind B2 · utility

0Cited by

4References

15Claims

0Family size

Assignee

Covestro Intellectual Property GmbH & Co. KG · DE

Inventors

Erika Zhu · Shanghai, CN
Ling Shi · Shanghai, CN
Hua Lu · Hangzhou City, CN
Jun Li · Lo Wu, CN
Chenxi Zhang · Shanghai, CN

Key dates

Filing date	Dec 22, 2017
Grant date	Nov 30, 2021
Priority date	—
Expiry date	Apr 30, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2125/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present application discloses a polyol system for preparing polyurethane comprising: i) at least one active chain extender having at least two groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —NH2 group; ii) at least one active chain extender having three groups that can react with an isocyanate, wherein at least one group that can react with an isocyanate is free primary —OH group, and iii) at least one polyether polyol starting from an amine. The polyol system according to the present disclosure is phase-stable without layering and capable of releasing mold quickly after reacting with an isocyanate to produce polyurethane.

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