Water-based hydrogel blend coating and method of application to elastomeric articles

Patent metadata

Field	Value
Publication number	US-11577009-B2
Application number	US-202016834579-A
Country	US
Kind code	B2
Filing date	Mar 30, 2020
Priority date	Oct 18, 2015
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

A water-based hydrogel polymer coating and a method of application to natural rubber or other elastomeric latex products are provided. The water-based hydrogel polymer is mixed with a blend of at least one elastomeric material to provide a hydrogel polymer blend composition. The water-based hydrogel polymer blend composition is applied in a single application to an elastomeric article, such as gloves, without additional solvents in the polymer blend composition and without a separate acid or chemical priming step. The water-based hydrogel coating herein provides increased lubricity to facilitate improved wet and dry donning of the elastomeric article.

First claim

What is claimed is:

1. A method for preparing a coated article, the method comprising:
dipping an elastomeric article in an aqueous coating composition to obtain a coated article, the coating composition comprising a water-based hydrogel and at least a first elastomeric material;
curing the coated article; and
drying the coated article,
wherein the coating composition contains no added solvents, and
wherein the method is free of a chemical priming step prior to dipping the elastomeric article in the coating composition.

2. The method of claim 1 , wherein the coating composition comprises a second elastomeric material that is different from the first elastomeric material.

3. The method of claim 1 , further comprising chlorinating the coated article.

4. The method of claim 1 , further comprising spraying the coated article with a lubricant solution.

5. The method of claim 1 , wherein the elastomeric article comprises the first elastomeric material.

6. The method of claim 1 , wherein the coated article is chlorine-free.

7. The method of claim 1 , wherein the coating composition has a total solids content of between about 3% and about 7%.

8. The method of claim 1 , wherein the first elastomeric material is selected from the group consisting of a natural rubber latex and a polyisoprene latex.

9. The method of claim 1 , wherein the coating composition further comprises a surfactant.

10. The method of claim 1 , wherein the coating composition further comprises a biocide.

11. The method of claim 1 , further comprising reversing the coated article after drying such that a coated surface of the coated article is an interior surface.

12. The method of claim 1 , further comprising forming the elastomeric article prior to dipping the elastomeric article in the coating composition.

13. The method of claim 12 , wherein forming the elastomeric article comprises dipping a former into a latex material.

14. The method of claim 13 , wherein the former comprises a textured surface.

15. The method of claim 13 , wherein the latex material is wet when the elastomeric article is dipped in the coating composition.

16. The method of claim 1 , wherein the water-based hydrogel polymer is present in an amount of from about 50% to about 99% by weight of the coating composition.

17. The method of claim 1 , wherein the first elastomeric material is present in an amount of from about 0.5% to about 37% by weight of the coating composition.

18. The method of claim 1 , wherein the coated article is powder free.

19. The method of claim 1 , wherein the elastomeric article is a glove.

Assignees

• Allegiance Corp

Inventors

• Woo Choon Kong
• Chong Chuang Sim
• Dangseeyun Nujalee
• Wannawong Panor

Classifications

• A61B42/10

  Surgical gloves · CPC title

• A61L31/10 Primary

  Macromolecular materials · CPC title

• A61L2400/10

  Materials for lubricating medical devices · CPC title

• A61L31/14 Primary

  Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials} · CPC title

• A61L31/041

  Mixtures of macromolecular compounds · CPC title