Exterior-coated nitrile rubber article having natural rubber characteristics

An elastomeric glove comprising:

• a glove substrate formed from a formulation containing a carboxylated nitrile-butadiene random terpolymer composition having an acrylonitrile content of between about 17 wt. % to 45 wt. %, a carboxylic acid content of up to about 15 wt. %, and the remaining balance of the terpolymer being butadiene, and a glass transition temperature (Tg) in a range of about −15° C. to about −30° C., and between 0-1.5 parts of an alkali monovalent salt and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali monovalent salt and metallic oxide is greater than 1.0 part per 100 dry parts of rubber consisting of the carboxylated nitrile-butadiene random terpolymer, the glove substrate having a thickness in a palm region of from about 0.05 to about 0.12 mm, and exhibiting a force-strain profile of from about 0.8 N to about 2.0 N, over an extension range of about 100-400%, an elastic modulus in a range of from about 3 MPa to about 6 MPa at about 300% stretch elongation, and a force to break of between about 8-14 Newtons (N) when tested in accordance with ASTM D412-98a, and the glove further comprising an inner, donning surface and an exterior, gripping surface, and a release coating on the exterior, gripping surface, wherein the release coating is selected from a silicone emulsion, silicone oil, a glycerin solution, a mixture of silicone and glycerin/glycerol, a fluorocarbon release agent, a natural or synthetic hydrocarbon-based oil, and combinations thereof.

An elastomeric glove comprising:

• a glove substrate with a palm region having a thickness in the range from about 0.05 mm to about 0.12 mm;
• the glove substrate being formed from a formulation containing a carboxylated nitrile-butadiene random terpolymer composition having an acrylonitrile content of between about 17 wt. % to 45 wt. %, a carboxylic acid content of up to about 15 wt. %, and the remaining balance of the terpolymer being butadiene, and a glass transition temperature (Tg) in a range of about −15° C. to about −30° C., and between 0-1.5 parts of an alkali monovalent salt and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali monovalent salt and metallic oxide is greater than 1.0 part per 100 dry parts of rubber consisting of the carboxylated nitrile-butadiene random terpolymer, in which the metallic oxide provides ionic cross linking and the alkali monovalent salt can provide associative bonding;
• the glove substrate requiring a force of less than or equal to about 2.5 N to cause a 400 percent elongation (F-400) from initial dimensions and in which the glove substrate exhibits a force-to-break of between about 8-14 N and a substantially linear force-to-strain response up to about 300 percent elongation from initial dimensions which occurs at a up to about 1.5 N when tested in accordance with ASTM D412-98a, and the glove further comprising an inner, donning surface and an exterior, gripping surface, and a release coating on the exterior, gripping surface, wherein the release coating is selected from a silicone emulsion, silicone oil, a glycerin solution, a mixture of silicone and glycerin/glycerol, a fluorocarbon release agent, a natural or synthetic hydrocarbon-based oil, and combinations thereof.

An elastomeric nitrile-rubber glove comprising:

• a glove substrate formed from formulation containing a carboxylated nitrile-butadiene random terpolymer composition having a glass transition temperature (Tg) in a range of about −15° C. to about −30° C., and in terms of parts per 100 dry parts of rubber consisting of carboxylated nitrile-butadiene random terpolymer, 0-1.5 parts of an alkali monovalent salt and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali monovalent salt and metallic oxide is greater than 1.0 part per 100 dry parts of rubber consisting of the carboxylated nitrile-butadiene random terpolymer, the glove substrate having a thickness, as measured in a palm region of said nitrile-rubber glove, that is from about 0.05 to about 0.12 mm;
• and which exhibits a force-to-strain profile of from about 0.8 N to about 2.0 N, over an extension range of about 100-400%, an elastic modulus in a range of from about 3 MPa to about 6 MPa at about 300% stretch elongation, and the glove substrate exhibits a force to break from about 6.5 N to about 15 N when tested in accordance with ASTM D412-98a, and the glove further comprising an inner, donning surface and an exterior, gripping surface, and a release coating on the exterior, gripping surface, wherein the release coating is selected from a silicone emulsion, silicone oil, a glycerin solution, a mixture of silicone and glycerin/glycerol, a fluorocarbon release agent, a natural or synthetic hydrocarbon-based oil, and combinations thereof.