Elastomeric chemical barrier articles
Provided among other things is an elastomeric article providing a chemical barrier, the article having a layered structure comprising a sequential laminate of: (a) a latex-based elastomeric polymeric barrier layer; (b) a non-reactive tie adhesive resin layer comprising oxo (—(C═O)—) groups; and (c) a polyamide layer; wherein the layered structure has a first side nearest the latex-based elastomeric polymeric barrier layer and a second side; wherein the layered structure is effective to provide a chemical permeation time in excess of 100 minutes pursuant to EN 16523-1:2015 for benchmark solvents of acetone, ethyl acetate and methanol, when applied to the first side, and in excess of 100 minutes for acetone when applied to the second side; and wherein the elastomeric layer is primarily not polyolefin.
1. An elastomeric glove providing a chemical barrier, the glove having a layered structure comprising:
(a) an aqueous latex-based elastomeric polymeric barrier layer formed by dipping a former into a colloidally stable blend comprising greater than about 50% by weight of a rubber lattice blended in an aqueous elastomeric latex, the rubber lattice comprising natural rubber, chloroprene rubber, butyl rubber, acrylonitrile butadiene rubber, styrene-butadiene rubber, polyurethane, or a combination thereof;
(b) a non-reactive tie adhesive resin layer comprising oxo (—(C═O)—) groups, disposed by dipping on the aqueous latex-based elastomeric polymeric barrier layer comprising a carbon atom doubled bonded to an oxygen atom; and
(c) a polyamide layer disposed on the non-reactive tie adhesive resin layer by dipping comprising polyamide polymer;
wherein one or more of the layers are dried and cured after said dipping;
wherein the layered structure has a first side nearest the aqueous latex-based elastomeric polymeric barrier layer and a second side;
wherein the layered structure is effective to provide a chemical permeation time in excess of 100 minutes pursuant to EN 16523-1:2015 for benchmark solvents of acetone, ethyl acetate and methanol, when applied to the first side, and in excess of 100 minutes for acetone when applied to the second side;
wherein the aqueous latex-based elastomeric polymeric barrier layer is less than 50% by weight polyolefin.
2. The elastomeric glove of claim 1 , wherein polymers of the aqueous latex-based elastomeric polymeric barrier layer comprise greater than 50% by weight butyl, NBR, chloroprene, or blends thereof, and further comprises vinyl polymers comprising oxo (—(C═O)—) groups, each comprising a carbon atom doubled bonded to an oxygen atom.
3. The elastomeric glove of claim 2 , wherein the aqueous latex-based elastomeric polymeric barrier layer is essentially free of polyolefin.
4. The elastomeric glove of claim 1 , wherein polymers of the aqueous latex-based elastomeric polymeric barrier layer are blended with a water dispersible saturated polyester resin, ultrafine high molecular weight polyamide powder, ethylene based copolymer, a hydrophobic wax, or a mixture thereof.
5. The elastomeric glove of claim 1 , wherein the aqueous latex-based elastomeric polymeric barrier layer is from about 5 mils to about 20 mils in thickness, wherein the non-reactive tie adhesive resin layer is from about 0.3 mil to about 10 mils in thickness, and wherein the polyamide layer is from about 0.1 mils to about 5 mils in thickness.
6. The elastomeric glove of claim 1 , wherein the non-reactive tie adhesive resin layer comprises greater than or equal to about 50% by weight of EVA, EMA, EAA, ethylene vinyl polyester, ethylene grafted maleic anhydride or AMP, or mixtures thereof.
7. The elastomeric glove of claim 6 , wherein the aqueous latex-based elastomeric polymeric barrier layer comprises NBR and a water dispersible polyester resin.
8. The elastomeric glove of claim 1 , wherein the polyamide polymer comprises nylon 6, nylon 66, nylon 69, nylon 610, nylon 612, or a combination thereof.
9. The elastomeric glove of claim 1 , wherein the polyamide polymer comprises:
about 30 to about 75% by weight nylon 6;
about 5 to about 80% by weight nylon 66;
about 20 to about 55% by weight nylon 69;
about 10 to about 80% by weight nylon 610; or
about 10 to about 80% by weight nylon 612.
10. The elastomeric glove of claim 1 , wherein the polyamide polymer comprises:
i) a terpolymer comprising nylon 6, nylon 66, and nylon 69, wherein:
the nylon 6 is present at about 35 to about 55% by weight;
the nylon 66 is present at about 5 to about 35% by weight; and
the nylon 69 is present at about 20 to about 55% by weight in the terpolymer;
ii) a terpolymer comprising nylon 6, nylon 66, and nylon 610, wherein:
the nylon 6 is present at about 35 to about 75% by weight;
the nylon 66 is present at about 10 to about 80% by weight; and
the nylon 610 is present at about 10 to about 80% by weight in the terpolymer; or
iii) a terpolymer comprising nylon 6, nylon 66, and nylon 612, wherein:
the nylon 6 is present at about 30 to about 75% by weight;
the nylon 66 is present at about 10 to about 80% by weight; and
the nylon 612 is present at about 10 to about 80% by weight in the terpolymer.
11. The elastomeric glove of claim 1 , wherein the aqueous latex-based elastomeric polymeric barrier layer comprises chloroprene and hydrophobic wax, and wherein the non-reactive tie adhesive resin layer comprises EVA copolymer.
12. The elastomeric glove of claim 1 , wherein the benchmark solvents show a chemical permeation time in excess of 200 minutes.
13. The elastomeric glove of claim 1 , wherein the benchmark solvents include MEK.
14. The elastomeric glove of claim 1 , wherein the elastomeric layer is substantially not polyolefin in that less than 30% weight of polymer is polyolefin.
15. The elastomeric glove of claim 1 , wherein the elastomeric layer is materially not polyolefin in that less than 20% weight of polymer is polyolefin.
16. The elastomeric glove of claim 1 , wherein a polyamide polymer of the polyamide layer has a melting point from about 100° C. to about 200° C.
17. The elastomeric glove of claim 1 , wherein the polyamide polymer comprises one or more polymers formed from monomers selected from the group consisting of caprolactam, adipic acid, azelaic acid, sebacic acid, 1,10-decanedicarboxylic acid and hexamethylene diamine.
18. A method of forming the elastomeric article glove providing a chemical barrier of claim 1 , comprising:
forming the aqueous latex-based elastomeric polymeric barrier layer by dipping a former into the colloidally stable blend comprising greater than about 50% by weight of a rubber lattice blended in an aqueous elastomeric latex, the rubber lattice comprising natural rubber, chloroprene rubber, butyl rubber, acrylonitrile butadiene rubber, styrene-butadiene rubber, polyurethane, or a combination thereof;
dipping the former having the aqueous latex-based elastomeric polymeric barrier layer into the non-reactive tie adhesive resin comprising a carbon atom doubled bonded to an oxygen atom oxo (—(C═O)—) groups on a surface of the aqueous latex-based elastomeric polymeric barrier layer to form the non-reactive tie adhesive resin layer; and
dipping the former having the non-reactive tie adhesive resin layer into a dispersion comprising the polyamide polymer forming the polyamide layer on the non-reactive tie adhesive resin layer.
19. A method of using the elastomeric glove providing a chemical barrier of claim 1 , comprising: donning a human hand at risk of chemical exposure with the glove; and wearing the glove for a period of time during which there is a risk of such exposure.
20. The elastomeric glove of claim 1 , wherein the aqueous latex-based elastomeric polymeric barrier layer provides greater than about 50% of a thickness of the glove.
21. An elastomeric glove providing a chemical barrier, the glove having a layered structure comprising:
(a) an aqueous latex-based elastomeric polymeric barrier layer formed by dipping a former into a colloidally stable blend comprising greater than about 50% by weight of a rubber lattice blended in an aqueous elastomeric latex, the rubber lattice comprising natural rubber, chloroprene rubber, butyl rubber, acrylonitrile butadiene rubber, styrene-butadiene rubber, polyurethane, or a combination thereof;
(b) a non-reactive tie adhesive resin layer comprising oxo (—(C═O)—) groups, disposed by dipping on the aqueous latex-based elastomeric polymeric barrier layer each comprising a carbon atom doubled bonded to an oxygen atom; and
(c) a polyamide layer disposed on the non-reactive tie adhesive resin layer by dipping, comprising polyamide polymer;
wherein one or more of the layers are dried and cured after said dipping;
wherein the layered structure has a first side nearest the aqueous latex-based elastomeric polymeric barrier layer and a second side;
wherein, for permeation time measured pursuant to EN 16523-1:2015 and compared to a comparative layer of material of the aqueous latex-based elastomeric polymeric barrier layer of a thickness of the layered structure, the layered structure is effective to provide an acetone chemical permeation time superior to that for the comparative layer, whether the acetone is applied on the first side or the second side, and an ethyl acetate and a methanol permeation time superior to those for the comparative layer when applied to the first side, wherein for one such measurement the permeation time is about five-times or more superior to the comparative layer, and
wherein the aqueous latex-based elastomeric polymeric barrier layer is less than 50% by weight polyolefin, and
wherein the aqueous latex-based elastomeric polymeric barrier layer provides greater than about 50% of a thickness of the glove.