Hybrid sol-gel coated glass containers

• US 10,450,221 B2
• Filed: 02/24/2011
• Issued: 10/22/2019
• Est. Priority Date: 02/24/2011
• Status: Active Grant

• Current Assignee: Owens-Brockway Glass Container Incorporated (O-I Glass, Inc.)
• Original Assignee: Owens-Brockway Glass Container Incorporated (O-I Glass, Inc.)
• Inventors: Click, Carol A., Sharma, Pramod K.
• Primary Examiner(s): Penny, Tabatha L
• Application Number:
  US13/034,407
• Publication Number:
  US 20120217181A1
• Time in Patent Office: 3,162 Days
• Field of Search: 4273762
• CPC Class Codes: C03C 1/008 for the production of films or coatings
• CPC Class Codes: C03C 17/005 Coating the outside
• CPC Class Codes: C03C 17/009 Mixtures of organic and inorganic materials, e.g. ormosils and ormocers
• CPC Class Codes: C03C 2218/113 by sol-gel processes
• CPC Class Codes: C03C 2218/114 by brushing, pouring or doctorblading
• CPC Class Codes: Y10T 428/1317 Multilayer [continuous layer]

Abstract

A glass container and related methods of manufacturing and coating glass containers. An exterior glass surface of a glass container is coated with a hybrid sol-gel and heated to cross-link the hybrid sol-gel. The resulting cross-linked hybrid sol-gel coating on the exterior glass surface of the glass container has greater than 90% silicate-based material by weight.

Claims

1. A method of coating an exterior surface of a glass container that includes the steps of:

(a) providing a hybrid sol-gel having a solids content of greater than 90% by volume and being formed from a composition including at least one silane and at least one solvent;

(b) heating said hybrid sol-gel to produce a heated hybrid sol-gel having a target viscosity of between 0.025 Pa·

s and 0.05 Pa·

s;

(c) coating the exterior glass surface of the glass container with said heated hybrid sol-gel; and

(d) heating said coated exterior glass surface of the glass container to cross-link said hybrid sol-gel and result in a transparent coating on said exterior glass surface of the glass container having greater than 90% silicate-based material by weight.

2. The method set forth in claim 1 wherein said composition in step (a) includes between 50% and 60% by weight of at least one silane and between 40% and 50% by weight of at least one solvent.

3. The method set forth in claim 1 wherein said composition in step (a) includes between 52% and 58% by weight of at least one silane and between 42% and 46% by weight of at least one solvent, said temperature in step (b) is between 90 degrees Celsius and 110 degrees Celsius, said temperature in step (c) is between 95 degrees Celsius and 125 degrees Celsius, and said heating step (d) is carried out at a temperature of between 140 degrees Celsius and 160 degrees Celsius.

4. The method set forth in claim 1 wherein said composition in step (a) includes about 56% by weight of at least one silane and about 44% by weight of at least one solvent, said temperature in step (b) is about 100 degrees Celsius, said temperature in step (c) is about 110 degrees Celsius, and said heating step (d) is carried out at a temperature of about 150 degrees Celsius.

5. The method set forth in claim 1 wherein said at least one silane in step (a) includes at least one of methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, 3 glycidoxypropyltrimethoxisilane, 3 glycidoxypropyldimethoxyethoxysilane, aminopropylmethyldimethosilane, aminopropyltrimethoxysilane, gamma mercaptopropyltrimethoxysilane, or vinyltrimethoxysilane, and wherein said at least one solvent in step (a) includes at least one of anhydrous ethanol, methanol, normal propanol, isopropanol, butanol, diethylene glycol, acetones, methylethylketones, tryethyleneglycols, vinylpyrrolidones, toluene, glycerine, phenol, benzyl alcohol, or dioxane.

6. The method set forth in claim 1 wherein said at least one silane in step (a) includes methyltriethoxysilane and dimethyldiethoxysilane, and wherein said at least one solvent includes at least one of methanol or anhydrous ethanol.

7. The method set forth in claim 1 wherein said at least one silane in step (a) includes phenyltriethoxysilane and diphenyldiethoxysilane, and wherein said at least one solvent includes anhydrous ethanol.

8. The method set forth in claim 1 wherein said at least one silane in step (a) includes phenyltrimethoxysilane and diphenyldimethoxysilane, and wherein said at least one solvent includes methanol.

9. The method set forth in claim 1 wherein said composition in step (a) includes a silane to solvent weight ratio of between 1.5:

1 and 1;

1.

10. The method set forth in claim 1 wherein said composition in step (a) includes a silane to solvent weight ratio of about 1.3:

1.

11. The method set forth in claim 1 wherein said hybrid sol-gel is doped with an ultraviolet blocking material, wherein ultraviolet blocking material is not applied in a separate step.

12. The method set forth in claim 11 wherein said ultraviolet blocking material is at least one of cerium oxide, titanium oxide, zinc oxide, bismuth oxide, or barium titanate.

13. The method set forth in claim 1 wherein said hybrid sol-gel is doped with at least one metal alkoxide that is not applied in a separate step.

14. The method set forth in claim 13 wherein said at least one metal alkoxide is at least one of cerium alkoxide or titanium dialkoxide.

15. The method set forth in claim 1 wherein said at least one silane includes at least one of methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldiethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, 3 glycidoxypropyltrimethoxi silane, 3 glycidoxypropyldimethoxyethoxysilane, aminopropylmethyldimethosilane, aminopropyltrimethoxysilane, gamma mercaptopropyltrimethoxysilane, or vinyltrimethoxysilane.

16. The method set forth in claim 1 wherein said at least one solvent includes at least one of anhydrous ethanol, methanol, normal propanol, isopropanol, butanol, diethylene glycol, acetones, methylethylketones, tryethyleneglycols, vinylpyrrolidones, toluene, glycerine, phenol, benzyl alcohol, or dioxane.

17. The method set forth in claim 1 wherein said step (c) is performed at a temperature between 5 degrees Celsius and 15 degrees Celsius higher than the temperature at which the hybrid sol-gel is heated in said step (b).

18. The method set forth in claim 1 wherein step (b) includes heating the hybrid sol-gel to a temperature between 70 degrees Celsius and 130 degrees Celsius to obtain the target viscosity.

19. The method set forth in claim 18 wherein step (d) is carried out at a temperature between 130 degrees Celsius and 170 degrees Celsius.

20. The method set forth in claim 1 wherein step (c) is carried out at a temperature between 90 degrees Celsius and 130 degrees Celsius.

21. The method set forth in claim 1 that includes, after step (d), applying an organic cold end coating to the exterior glass surface of the glass container over the transparent coating.

22. The method set forth in claim 1 wherein said heated hybrid sol-gel is coated onto the exterior glass surface of the glass container by being sprayed onto the exterior glass surface of the glass container.

23. A method of coating an exterior surface of a glass container that includes:

coating an exterior glass surface of a glass container with a hybrid sol-gel having a temperature between 70 degrees Celsius and 130 degrees Celsius, a solids content of greater than 90% by volume, and a target viscosity of between 0.025 Pa·

s and 0.05 Pa·

s; and

heating the exterior glass surface of the glass container to cross-link said hybrid sol-gel and result in a uniform coating on the exterior glass surface of the glass container.

24. The method set forth in claim 23 wherein said hybrid sol-gel is formed from a method that includes:

(i) providing a solution including a silane and a solvent;

(ii) allowing the silane and the solvent to interact with one another for a sufficient amount of time to obtain a gel; and

then

(iii) heating the gel at a sufficient temperature and for a sufficient amount of time to remove the solvent and water therefrom.

25. The method set forth in claim 23 wherein the hybrid sol-gel is formed from a composition that includes between 50% and 60% by weight of at least one silane and between 40% and 50% by weight of at least one solvent.

26. The method set forth in claim 23 wherein the exterior glass surface of the glass container is heated at a temperature of between 130 degrees Celsius and 170 degrees Celsius to cross-link the hybrid sol-gel.

27. The method set forth in claim 23 wherein said hybrid sol-gel is coated onto the exterior glass surface of the glass container by being sprayed onto the exterior glass surface of the glass container.