Use of crystal water-free Fe(II) compounds as radiation absorbers

US11536880B2 · kind B2 · utility

Assignee

• Chemische Fabrik Budenheim KG · DE

Inventors

• Rüdiger Wissemborski · Gau-Algesheim, DE
• Christian LITTERSCHEID · Ober-Olm, DE
• Rainer Schnee · Mainz, DE
• Franziska WELSCH-PAPENBREER · Waldalgesheim, DE
• Joachim Adolf · Mainz, DE

Key dates

• Filing date: Mar 26, 2018
• Grant date: Dec 27, 2022
• Expiry date: Aug 6, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2003/328
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of using an absorber of electromagnetic radiation, includes absorbing electromagnetic radiation with the absorber finely distributed or dissolved in a carrier material. The absorber is a crystal water-free iron(II) orthophosphate of the general formula Fe3(PO4)2 or crystal water-free iron(II) metal orthophosphate, iron(II) metal phosphonate, iron(II) metal pyrophosphate or iron(II) metal metaphosphate of the general formula FeaMetb(POc)d, where a is a number from 1 to 5, b is a number from >0 to 5, c is a number from 2.5 to 5, d is a number from 0.5 to 3 and Met represents one or more metals selected from the group consisting of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, the transition metals (d block), the metals and semimetals of the third, fourth and fifth main groups, and the lanthanoids or combinations of the above mentioned phosphates as absorbers of electromagnetic radiation.