Methods of facilitating removal of a fingerprint

Patent metadata

Field	Value
Publication number	US-11834635-B2
Application number	US-202117233598-A
Country	US
Kind code	B2
Filing date	Apr 19, 2021
Priority date	Jun 21, 2010
Publication date	Dec 5, 2023
Grant date	Dec 5, 2023

Abstract

Bioactive coatings that include a base and a protein associated with the base for actively promoting the removal of organic stains are provided. In aspects, bioactive coatings that are stabilized against inactivation by weathering are provided including a base associated with a chemically modified enzyme, and, optionally a first polyoxyethylene present in the base and independent of the enzyme. The coatings are optionally overlayered onto a substrate to form an active coating facilitating the removal of organic stains or organic material from food, insects, or the environment.

First claim

What is claimed is:

1. A method of facilitating removal of a fingerprint from a substrate or a coating comprising:
providing a lipase-associated substrate or coating material that is capable of enzymatically degrading a fat or oil component of a fingerprint, said lipase-associated substrate or coating material prepared by a method comprising: producing an admixture of a polymer resin, a surfactant, and a non-aqueous organic solvent; mixing an aqueous solution comprising a lipase with said admixture, wherein said aqueous solution is substantially free of surfactant, to produce an emulsion; mixing said emulsion with a crosslinker to produce a curable composition; and curing said curable composition, thereby producing said lipase-associated substrate or coating material that is capable of enzymatically degrading a fat or oil component of a fingerprint;
facilitating said removal of a fingerprint from said lipase-associated substrate or coating material by rinsing.

2. The method of claim 1 wherein said lipase is uniformly dispersed in said substrate or coating material in protein aggregates having an average diameter of 10 micrometers or less.

3. The method of claim 1 wherein said polymer resin is an organic crosslinkable polymer resin.

4. The method of claim 1 wherein the lipase is present at 2-8 weight percent of the total weight of the substrate or coating material.

5. The method of claim 1 wherein said lipase-associated substrate or coating material has a surface activity of about 200 Units/gram.

6. The method of claim 1 wherein said curing is thermal curing.

Assignees

• Toyota Motor Corp
• Univ Minnesota

Inventors

• Buthe Andreas
• Wang Ping
• Wu Songtao
• Jia Hongfei
• Ishii Masahiko
• Zhang Minjuan

Classifications

• C11D3/38618 Primary

  Protease or amylase in liquid compositions only · CPC title

• C08G18/6225

  Polymers of esters of acrylic or methacrylic acid · CPC title

• C08G18/792

  formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates · CPC title

• C09D175/04

  Polyurethanes · CPC title

• C11D3/04

  Water-soluble compounds · CPC title