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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12208447 B1

PDFFull Text
Date of Patent:
Jan. 28, 2025

Filed:

Oct. 21, 2019

Compositions, comprising silver nanoplatelets

Applicant:

Basf SE, Ludwigshafen am Rhein, DE;

Inventors:

Nikolay A. Grigorenko, Basel, CH;

Andre Oswald, Basel, CH;

Michelle Richert, Basel, CH;

Assignee:

BASF SE, Ludwigshafen am Rhein, DE;

Attorney:

Faegre Drinker Biddle & Reath LLP

Primary Examiner:

Kyle R Grabowski

Int. Cl.
CPC ...
B42D 25/373 (2014.01); B22F 1/00 (2022.01); B22F 1/052 (2022.01); B22F 1/054 (2022.01); B22F 1/0545 (2022.01); B22F 1/07 (2022.01); B22F 1/102 (2022.01); B22F 9/24 (2006.01); B41M 3/14 (2006.01); B42D 25/391 (2014.01); C08K 3/08 (2006.01); C09D 7/63 (2018.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01); C09D 5/29 (2006.01); C09D 11/037 (2014.01);
U.S. Cl.
CPC ...
B22F 1/052 (2022.01); B22F 1/00 (2013.01); B22F 1/0545 (2022.01); B22F 1/0551 (2022.01); B22F 1/07 (2022.01); B22F 1/102 (2022.01); B22F 9/24 (2013.01); B41M 3/14 (2013.01); B42D 25/373 (2014.10); B42D 25/391 (2014.10); C08K 3/08 (2013.01); C09D 7/63 (2018.01); B22F 2301/255 (2013.01); B22F 2304/054 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08K 2003/0806 (2013.01); C08K 2201/011 (2013.01); C09D 5/29 (2013.01); C09D 11/037 (2013.01);
Abstract

The present invention relates to compositions, comprising silver nanoplatelets, wherein the mean diameter of the silver nanoplatelets, present in the composition, is in the range of 20 to 70 nm with standard deviation being less than 50% and the mean thickness of the silver nanoplatelets, present in the composition, is in the range of 5 to 30 nm with standard deviation being less than 50%, wherein the mean aspect ratio of the silver nanoplatelets is higher than 1.5, a process for its production, printing inks containing the compositions and their use in security products. The highest wavelength absorption maximum of the population of all silver nanoplatelets in the composition being within the range of 450 to 550 nm. A coating, comprising the composition, shows a red, or magenta color in transmission and a greenish-metallic color in reflection.

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