Nitrile rubber article having natural rubber characteristics
AssigneeKimberly-Clark Worldwide, Inc.
InventorTimothy M. Lipnski
Life of this patent
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Abstract
An carboxylated nitrile-butadiene rubber latex formulation composed of a blend of a first acrylonitrile terpolymer and a second acrylonitrile terpolymer, wherein: the acrylonitrile content of the blended terpolymers is between 17 and 45% by weight, the methacrylic acid content of the blended termpolymers is less than 15% by weight, and the remaining balance of the terpolymers being butadiene. The invention also includes an elastomeric nitrile rubber article made from the formulation.
Claims23
A carboxylated nitrile-butadiene rubber latex formulation comprising a blend of a first acrylonitrile terpolymer and a second acrylonitrile terpolymer, wherein:
- the acrylonitrile content of the blended terpolymers is between 17 and 45% by weight,
- the methacrylic acid content of the blended termpolymers is less than 15% by weight, and
- the remaining balance of the terpolymers being butadiene.
An elastomeric glove formed from a carboxylated nitrile-butadiene rubber latex formulation comprising an acrylonitrile terpolymer, wherein:
- the acrylonitrile content is between 17 and 45% by weight,
- the methacrylic acid content is less than 15% by weight, and
- butadiene makes up the remainder of the formulation and the formulation further includes, in terms of parts per 100 dry parts of rubber consisting of the random terpolymer:
- 0-1.5 parts alkali hydroxide,
- 0.5-1.5 parts zinc oxide or other metal oxide,
- 0.5-1.5 parts sulfur, and
- 0.5-1.5 parts rubber accelerator,
- wherein the glove has a palm thickness in the range of between 0.05 and 0.10 mm, a tensile strength at break in the range of 30 MPa to 55 MPa, and an elongation at break in a range of about 550-750%.
An elastomeric glove comprising a carboxylated nitrile-butadiene rubber formed from formulation containing an acrylonitrile terpolymer comprising a random terpolymer of acrylonitrile, butadiene and carboxylic acid, the terpolymer having an acrylonitrile content between 17 and 45% by weight, a carboxylic acid content up to about 15% by weight, and remaining balance of the terpolymer being butadiene, and the formulation further includes, in terms of parts per 100 dry parts of rubber consisting of the random terpolymer, 0-1.5 parts of an alkali agent that provides monovalent ions and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali agent and metallic oxide is greater than 1.0 part per 100 dry parts of the rubber, 0.5-1.5 parts sulfur per 100 dry parts of the rubber, and 0.5-1.5 parts rubber accelerator per 100 dry parts of the rubber, wherein the glove has a palm thickness in the range of between 0.05 and 0.10 mm, a tensile strength at break in the range of 30 MPa to 55 MPa, and an elongation at break in a range of about 550-750%.
An elastomeric glove comprising a carboxylated nitrile-butadiene rubber formed from formulation containing an acrylonitrile terpolymer comprising a random terpolymer of acrylonitrile, butadiene and carboxylic acid, the terpolymer having an acrylonitrile content between 17 and 45% by weight, a carboxylic acid content up to about 15% by weight, and remaining balance of the terpolymer being butadiene, and the formulation further includes, in terms of parts per 100 dry parts of rubber consisting of the random terpolymer, 0-1.5 parts of an alkali agent that provides monovalent ions and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali agent and metallic oxide is greater than 1.0 part per 100 dry parts of the rubber, wherein the glove has a palm thickness in the range of between 0.05 and 0.10 mm, an elongation at break in a range of about 550-750%, and wherein the thickness for the glove to have a force at break of 10.1 N would be from 0.067 to 0.097 mm.
Dependencies are inferred from the claim text.