Patent · US Expired

Thermochromic polymer layer and method for production thereof

US7662466B2 · kind B2 · utility

9Cited by

4References

22Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Arno Seeboth · Berlin, DE
Jörg Kriwanek · Berlin, DE
Detlef Lotzsch · Berlin, DE

Key dates

Filing date	Aug 23, 2004
Grant date	Feb 16, 2010
Priority date	—
Expiry date	Dec 13, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31855
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a thermochromic polymer layer and also a method for production thereof. The method is based on addition of a thermochromic colorant and if necessary further additives at the beginning of the extrusion process and subsequent extrusion to form the thermochromic polymer layer. Furthermore, the invention relates to a multilayer composite system comprising at least one thermochromic polymer layer and also at least one further layer.

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