Patent · US Active

Thermochromic material, molded article comprising said material and use thereof

US9193863B2 · kind B2 · utility

2Cited by

5References

14Claims

0Family size

Assignee

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

Inventors

Detlef Lotzsch · Berlin, DE
Ralf Ruhmann · Berlin, DE
Arno Seeboth · Berlin, DE

Key dates

Filing date	Aug 8, 2013
Grant date	Nov 24, 2015
Priority date	—
Expiry date	Aug 8, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2211/1088
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to a thermochromic material comprising at least one biopolymer, at least one natural dye and at least one reaction medium, selected from the group of fatty acids and derivatives thereof, gallic acid and derivatives thereof and mixtures thereof. The thermochromic material according to the invention is completely based on non-toxic, natural products. Processing into materials or molded articles can occur, according to the invention, by means of conventional extrusion technology in the form of flat film, blown film or sheets or multi-wall sheets. The thermochromic material can be used in particular in the food industry and medical technology.

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