Bioactive protein-polymer compositions for stain removal

Patent metadata

Field	Value
Publication number	US-11692156-B2
Application number	US-202016900386-A
Country	US
Kind code	B2
Filing date	Jun 12, 2020
Priority date	Jun 21, 2010
Publication date	Jul 4, 2023
Grant date	Jul 4, 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 protein-polymer composition for removal of an organic stain from a substrate or coating, the composition comprising:
a substrate or coating formed of a two-component solvent-borne crosslinked polymer resin; and
a lipase, said lipase dispersed in said substrate or coating in aggregates having an average diameter of 1 nanometer to 10 micrometers;
wherein said lipase is entrapped within and crosslinked to said substrate or coating.

2. The composition of claim 1 , wherein said average diameter does not exceed 5 micrometers.

3. The composition of claim 1 , wherein said average diameter is 100 nanometers to 5 micrometers.

4. The composition of claim 1 , wherein said lipase is present at 0.1-50 weight percent of the total weight of said substrate or coating.

5. The composition of claim 1 , wherein said organic stain is a bacterial organic stain.

6. The composition of claim 5 , wherein said polymer resin is the reaction product between: a crosslinkable polymer comprising a reactive group selected from the group consisting of acetoacetate, acid, amine, carboxyl, epoxy, hydroxyl, isocyanate, silane, and vinyl; and a crosslinker.

7. The composition of claim 6 , wherein said reactive group is hydroxyl and said crosslinker is a polyisocyanate.

8. A composition for removal of an organic stain from a substrate or coating, the composition comprising:
a substrate or coating formed of an organic crosslinkable polymer resin; and
a lipase capable of enzymatically degrading a component of an organic stain, said lipase associated with said substrate or coating;
wherein said lipase is uniformly dispersed in said substrate or coating in protein aggregates having an average diameter of 10 micrometers or less;
wherein said lipase has an activity of at least 200 Units/gram.

9. The composition of claim 8 , wherein said lipase is present at 0.1-50 weight percent of the total weight of said substrate or coating.

10. The composition of claim 8 , wherein the lipase is present at 1-20 weight percent of the total weight of the substrate or coating.

11. The composition of claim 8 , wherein the lipase is present at 2-8 weight percent of the total weight of the substrate or coating.

12. The composition of claim 8 , wherein said organic stain is a bacterial organic stain.

13. The composition of claim 12 , wherein said lipase is entrapped within and crosslinked to said substrate or coating.

14. The composition of claim 12 , wherein said organic crosslinkable polymer resin comprises a functional group of acetoacetate, acid, amine, carboxyl, epoxy, hydroxyl, isocyanate, silane, or vinyl, or a combination thereof.

15. The composition of claim 12 , wherein said organic crosslinkable polymer is a hydroxyl-functionalized acrylate resin.

16. The composition of claim 8 , wherein said organic crosslinkable polymer resin is an aminoplast, melamine formaldehyde, carbamate, polyurethane, polyacrylate, epoxy, polycarbonate, alkyd, vinyl, polyamide, polyolefin, phenolic resin, polyester, or polysiloxane, or a combination thereof.

Assignees

• Toyota Eng & Mfg North America
• 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

• C11D7/04

  Water-soluble compounds · CPC title

• C08G18/6225

  Polymers of esters of acrylic or methacrylic acid · CPC title

• C11D3/386

  Preparations containing enzymes {, e.g. protease or amylase} · CPC title

• C11D3/38627

  containing lipase · CPC title