Compositions for facilitating biological stain removal

Patent metadata

Field	Value
Publication number	US-11624044-B2
Application number	US-202016933425-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	Jun 21, 2010
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

A substrate or coating is provided that includes a protease with enzymatic activity toward a component of a biological stain. Also provided is a process for facilitating the removal of a biological stain is provided wherein an inventive substrate or coating including a protease is capable of enzymatically degrading of one or more components of the biological stain to facilitate biological stain removal from the substrate or said coating.

First claim

The invention claimed is:

1. A composition for facilitating biological stain removal comprising:
a liquid bioactive coating material comprising a surfactant;
a compound selected from the group consisting of ammonia, a water miscible alcohol having 1 to 6 carbon atoms, and combinations thereof; and
a thermolysin-like protease, said protease capable of degrading a biological stain component.

2. The composition of claim 1 wherein said thermolysin-like protease is an active extracellular portion of bacterial neutral thermolysin-like-protease from Geobacillus stearothermophilus.

3. The composition of claim 1 wherein said liquid bioactive coating material includes said protease at a specific activity in excess of 20,000 U/g.

4. The composition of claim 1 wherein the pH of said liquid bioactive coating material is greater than 5.0.

5. The composition of claim 1 wherein said protease is in solution in said liquid bioactive coating material.

6. The composition of claim 1 wherein said liquid bioactive coating material comprises said alcohol, said alcohol present at less than 0.8% by weight.

7. The composition of claim 1 wherein said liquid bioactive coating material comprises said ammonia.

8. The composition of claim 1 wherein said composition comprises said alcohol, and said alcohol is methanol.

Assignees

• Toyota Eng & Mfg North America
• Toyota Motor Corp

Inventors

• Wu Songtao
• Jia Hongfei
• Ishii Masahiko
• Zhang Minjuan

Classifications

• C09D175/04

  Polyurethanes · CPC title

• C08G18/792

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

• D06M16/003

  with enzymes or microorganisms · CPC title

• D06L4/40

  using enzymes · CPC title

• C11D3/37

  Polymers {(polymeric surface-active agents C11D1/008; polysaccharides C11D3/222)} · CPC title