Granted Patent B2

US 12,320,060 · App. 18/753,686 · Granted Jun 3, 2025

Inventors: Gregory H. Altman (Providence, RI); Enrico Mortarino (Hickory, NC); Sara Ann Johnson (Cambridge, MA); Maria L. Ufret (Grafton, MA); Markrete Krikorian (Arlington, MA); Rebecca L Lacouture (Needham, MA)

Assignee: EVOLVED BY NATURE, INC.

D06M15/15C09D189/00D06M15/643D06P5/08D06M2101/12D06M2101/32D06M2101/34D06M2200/12D06M2200/35D06M2200/45D06M2200/50

Abstract

Claims (15)

1. A silk fibroin coated article comprising a leather substrate and a coating comprising low molecular weight silk fibroin protein fragments and medium molecular weight silk fibroin protein fragments.

2. The silk fibroin coated article of claim 1 , wherein the low molecular weight silk fibroin fragments have an average weight average molecular weight selected from between about 5 kDa to about 20 kDa.

3. The silk fibroin coated article of claim 2 , wherein the low molecular weight silk fibroin fragments have a polydispersity from 1 to about 5.

4. The silk fibroin coated article of claim 1 , wherein the medium molecular weight silk fibroin fragments have an average weight average molecular weight selected from between about 20 kDa to about 55 kDa.

5. The silk fibroin coated article of claim 4 , wherein the medium molecular weight silk fibroin fragments have and a polydispersity from 1 to about 5.

6. The silk fibroin coated article of claim 1 , wherein the leather substrate is natural leather or synthetic leather.

7. The silk fibroin coated article of claim 6 , wherein the natural leather is selected from chrome-tanned leather, vegetable-tanned leather, aldehyde-tanned leather, brain-tanned leather, formaldehyde-tanned leather, Chamois leather, rose-tanned leather, synthetic-tanned leather, alum-tanned leather, patent leather, Vachetta leather, nubuck leather, rawhide leather, split leather, full-grain leather, top-grain leather, and corrected-grain leather.

8. The silk fibroin coated article of claim 6 , wherein the synthetic leather is selected from poromeric imitation leathers, vinyl and polyamide felt fibers, polyurethane, polyvinyl chloride, polyethylene (PE), polypropylene (PP), vinyl acetate copolymer (EVA), polyamide, polyester, textile-polymer composite microfibers, corfan, koskin, leatherette, BIOTHANE®, BIRKIBUC®, BIRKO-FLOR®, CLARINO®, ECOLORICA®, KYDEX®, LORICA®, NAUGAHYDE®, REXINE®, VEGETAN®, and FABRIKOID®.

9. The silk fibroin coated article of claim 1 , wherein the w/w ratio between low molecular weight silk fibroin protein fragments and medium molecular weight silk fibroin protein fragments is about 90:10, about 80:20, about 75:25, about 70:30, about 66:34, about 60:40, about 50:50, about 40:60, about 34:66, about 30:70, about 25:75, about 20:80, or about 10:90.

10. The silk fibroin coated article of claim 1 , wherein the w/w ratio between low molecular weight silk fibroin protein fragments and medium molecular weight silk fibroin protein fragments is about 3:1.

11. The silk fibroin coated article of claim 1 , wherein the coating further comprises a chemical agent.

12. The silk fibroin coated article of claim 11 , wherein the chemical agent is selected from a silicone, an antimicrobial agent, an antifungal agent, a softener, a water repellant agent, an oil repellant agent, a dye, a flame retardant, and a pH adjusting agent.

13. The silk fibroin coated article of claim 11 , wherein the chemical agent modifies one or more of a first property and second property of the silk fibroin coated article.

14. The silk fibroin coated article of claim 13 , wherein the first property comprises one or more of an antimicrobial property, an antiodor property, a water repellant property, an oil repellant property, a flame retardant property, a coloring property, a stain repellant property, and a pH adjusting property.

15. The silk fibroin coated article of claim 1 , wherein the leather exhibits a property selected from improved color retention property, improved mildew resistance, improved resistance to freeze-thaw cycle damage, improved resistance to abrasion, improved blocking of ultraviolet (UV) radiation, improved regulation of the body temperature of a wearer, improved tear resistance, improved elasticity, improved rebound dampening, improved anti-itch properties, improved insulation, improved wrinkle resistance, improved stain resistance, and improved stickiness.

Assignments (1)

Continuity (7)

References Cited (400)