Patent · US Active

Halogenated diethyltoluenediamines

US9340487B2 · kind B2 · utility

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0References

21Claims

0Family size

Assignee

LONZA LTD · CH

Inventors

Stefan Ellinger · Visp, CH
Gaetano La Delfa · Naters, CH
Constanze Franzke · Goldkronach, DE

Key dates

Filing date	Oct 11, 2011
Grant date	May 17, 2016
Priority date	—
Expiry date	Oct 11, 2031

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C233/43
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Disclosed are halogenated diethyltoluenediamines of formulawherein either R1 is an amino group and R2 is chlorine or bromine, or R2 is an amino group and R1 is chlorine or bromine, and isomeric mixtures thereof. The halogenated diethyltoluenediamines of formula I are useful as chain extenders for polyurethanes and hardeners for epoxy resins having a relatively long gel time.

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