Soft nitrile zinc oxide free medical gloves
AssigneeMicroflex Corporation
InventorJian Tao
Life of this patent
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Abstract
A new formulation for producing nitrile gloves has been developed. The resulting glove shows following outstanding characteristics: stress at six minutes greater than 50% of its initial value; ultimate tensile strength and elongation well above ASTM requirements; and much lower modulus than almost all the nitrile gloves currently commercially available. The unique formulation is zinc oxide free and is vulcanized from 5 to 60 minutes at temperatures ranging from 300° F to 400° F.
Claims26
A zinc oxide free elastomer formulation for a glove comprising:
- a nitrile butadiene rubber latex;
- sulfur;
- zinc di-n-butylthiocarbamate;
- 2,2′-methylene-bis-(4-methyl-6-t-butylphenol);
- and
- zinc 2-mercaptobenzothiazole, wherein the sulfur is present in an amount of approximately 3.0 parts per 100 parts of the nitrile butadiene rubber.
A zinc oxide free elastomer formulation for a glove comprising:
- approximately 100 parts of nitrile butadiene rubber;
- approximately 1.0 parts zinc di-n-butylthiocarbamate;
- approximately 3.0 parts sulfur;
- approximately 1.0 parts titanium dioxide;
- approximately 1.0 parts 2,2′-methylene-bis-(4-methyl-6-t-butylphenol);
- approximately 1.0 parts potassium hydroxide;
- and
- approximately 1.0 parts zinc 2-mercaptobenzo-thiazole.
A zinc oxide free nitrile butadiene rubber for a glove which exhibits a relaxation property above 50%, wherein the glove is produced by a vulcanization process of heating the glove at a temperature ranging from 300-400° F for from 5 to 60 minutes.
Dependencies are inferred from the claim text.