Patent · US Expired

Spandex with high heat-set efficiency

US6472494B2 · kind B2 · utility

9Cited by

9References

9Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Nathan E. Houser · Waynesboro, US
Gordon W. Selling · Waynesboro, US

Key dates

Filing date	Feb 22, 2001
Grant date	Oct 29, 2002
Priority date	—
Expiry date	Apr 14, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S528/906
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A high heat-set efficiency, high unload power spandex, based on a polyurethaneurea prepared from a polyether glycol, mixtures of 2,4′-MDI and 4,4′-MDI, and chain extenders, is provided.

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