Composition for production of coatings having an antimicrobial property

US11713400B2 · kind B2 · utility

Assignee

• Evonik Operations GmbH · DE

Inventors

• Simone Schulte · Essen, DE
• Markus Hallack · Schermbeck, DE
• Sabine Krusenbaum · Essen, DE
• Christina Janke · Essen, DE

Key dates

• Filing date: Feb 16, 2021
• Grant date: Aug 1, 2023
• Expiry date: Jun 2, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K3/34
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A curable composition for production of coatings with an antimicrobial property contains at least one film-forming polymer, at least one up-conversion phosphor, optionally, at least one additive, and optionally, at least one curing agent. The phosphor is selected from the idealized general formula (I), A1-x-y-zB*yB2SiO4:Ln1x,Ln2z,, where x=0.0001-0.05, z=0 or z=0.0001 to 0.3, and y=x+z; A is selected from Mg, Ca, Sr, and Ba; B is selected from Li, Na, K, Rb, and Cs; B* is selected from Li, Na, and K; where B is the same as B* or B is not the same as B*, and B and B* are preferably not the same; Ln1 is selected from praseodymium (Pr), erbium (Er), and neodymium (Nd); and Ln2 is optionally selected from gadolinium (Gd).