Breathable elastomeric article
View Patent ↗The present invention is directed to breathable elastomeric articles. The articles of the present invention may allow the transmission of water vapor while still providing an effective barrier to virus, bacteria, contaminants, bodily fluids, and the like. In general, a breathability additive may be incorporated into the polymer matrix of one or more layers of the elastomeric article to improve the breathability of the layer.
1. An elastomeric article comprising:
a substrate body comprising at least one layer of a material, the at least one layer being made from a film-forming polymer, the substrate body having an inside surface and an outside surface; and
a breathability additive incorporated into the at least one layer of the substrate body, the breathability additive comprising an acrylic acid or salt, a polyolefin glycol or oxide, and a latent crosslinking agent.
2. An elastomeric article as defined in claim 1 , wherein the at least one layer comprises a material selected from the group consisting of natural rubber latex, a nitrile polymer, a polyurethane polymer, a polyvinyl chloride polymer, a silicone polymer, a styrene-ethylene butylene-styrene block copolymer, or a styrene-isoprene-styrene block copolymer.
3. An elastomeric article as defined in claim 1 , wherein the at least one layer comprises a nitrile polymer.
4. An elastomeric article as defined in claim 1 , wherein the breathability additive is present in the at least one layer in an amount sufficient to increase the moisture vapor transmission rate of the elastomeric article.
5. An elastomeric article as defined in claim 1 , wherein the breathability additive is present in the at least one layer in an amount sufficient to increase the Mocon moisture vapor transmission rate of the elastomeric article.
6. An elastomeric article as defined in claim 1 , wherein the at least one layer is a primary elastic layer of the elastomeric article.
7. An elastomeric article as defined in claim 1 , wherein the breathability additive is present in the at least one layer in an amount of from about 1 mass percent to about 30 mass percent.
8. An elastomeric article as defined in claim 1 , wherein the elastomeric article further comprises a donning layer in addition to the at least one layer.
9. An elastomeric article as defined in claim 1 , wherein the elastomeric article is a glove.
10. An elastomeric article as defined in claim 1 , wherein the elastomeric article is a condom.
11. An elastomeric article comprising:
a substrate body comprising at least one layer of a material, the at least one layer being made from a film-forming polymer, the substrate body having an inside surface and an outside surface; and
a breathability additive incorporated into the at least one layer of the substrate body, the breathability additive comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units, about 0.1 to about 20% by mass ester units selected from the group consisting of acrylate and methacrylate ester units that include an alkoxysilane functionality, and about 0.1 to about 75% by mass of units selected from the group consisting of polyolefin glycol and polyolefin oxide units.
12. An elastomeric article as defined in claim 11 , wherein the breathability additive is present in the at least one layer in an amount sufficient to increase the moisture vapor transmission rate of the elastomeric article.
13. An elastomeric article as defined in claim 11 , wherein the breathability additive is present in the at least one layer in an amount sufficient to increase the Mocon moisture vapor transmission rate of the elastomeric article.
14. An elastomeric article as defined in claim 11 , wherein the at least one layer comprises natural rubber latex.
15. An elastomeric article as defined in claim 11 , wherein the at least one layer comprises a nitrile polymer.
16. An elastomeric article as defined in claim 11 , wherein the at least one layer is a primary elastic layer of the article.
17. An elastomeric article as defined in claim 11 , wherein the at least one layer comprises a block copolymer.
18. An elastomeric article as defined in claim 11 , wherein the at least one layer comprises a donning layer.
19. An elastomeric article as defined in claim 11 , wherein the at least one layer comprises a grip layer.
20. An elastomeric article as defined in claim 11 , wherein the breathability additive is incorporated into the at least one layer in an amount from about 1 to about 30 parts per hundred by weight of the film-forming polymer.
21. An elastomeric article as defined in claim 11 , wherein the breathability additive is incorporated into the at least one layer in an amount up to about 30 mass percent of the layer.
22. An elastomeric article as defined in claim 11 , wherein the breathability additive is present in every layer of the substrate body.
23. An elastomeric article as defined in claim 11 , wherein the elastomeric article is a glove.
24. An elastomeric article as defined in claim 11 , wherein the elastomeric article is a condom.
25. A process for forming an elastomeric article comprising:
providing dip composition containing a film-forming polymer and a breathability additive, the breathability additive comprising about 15 to about 99.9% by mass monoethylenically unsaturated polymer units, about 0.1 to about 20% by mass ester units elected from the group consisting of acrylate and methacrylate ester units that include an alkoxysilane functionality, and about 0.1 to about 75% by mass of units selected from the group consisting of polyolefin glycol and polyolefin oxide units;
dipping a former into the composition and withdrawing the former from the composition so as to form a film on the former, the film containing the polymer and the breathability additive;
drying the film on the former; and
stripping the film from the former to form an elastomeric article.
26. A process as defined in claim 25 , wherein the polymer comprises a natural rubber latex.
27. A process as defined in claim 25 , wherein the polymer comprises a nitrile polymer.
28. A process as defined in claim 25 , wherein the polymer comprises a block copolymer.
29. A process as defined in claim 25 , wherein the breathability additive is added to the composition as a solution.
30. A process as defined in claim 25 , wherein the breathability additive is present in the composition in an amount up to about 30 mass percent.
31. A process as defined in claim 25 , wherein the breathability additive is present in the composition in an amount of from about 0.5 mass percent to about 10 mass percent.
32. A process as defined in claim 25 , further comprising the step of curing the polymer contained in the film.
33. A process as defined in claim 25 , further comprising the step of forming a donning layer on the elastomeric article.
34. A process as defined in claim 25 , further comprising the step of chlorinating at least one surface of the elastomeric article.
35. A process as defined in claim 25 , wherein the elastomeric article is a glove.
36. A process as defined in claim 25 , wherein the elastomeric article is a condom.