Latex gloves with improved donnability

• US 5,084,514 A
• Filed: 11/14/1990
• Issued: 01/28/1992
• Est. Priority Date: 11/14/1990
• Status: Expired due to Term

• Current Assignee: Bangkok Synthetics Co., Ltd.
• Original Assignee: Reichhold Chemicals Incorporated (Reichhold Liquidation, Inc.)
• Inventors: Szczechura, Bernard J., Durney Cronin, Rebecca L.
• Primary Examiner(s): Schofer, Joseph L.
• Assistant Examiner(s): NAGUMO, MARK
• Application Number:
  US07/613,313
• Time in Patent Office: 440 Days
• Field of Search: 526/329.1, 525/329.3, 525/123, 525/192, 525/221, 524/559, 524/560
• US Class Current: 525/123
• CPC Class Codes: A41D 19/0055 Plastic or rubber gloves
• CPC Class Codes: A41D 2400/44 Donning facilities
• CPC Class Codes: C08F 236/12 with nitriles
• CPC Class Codes: C08J 2313/00 Characterised by the use of rubbers containing carboxyl groups
• CPC Class Codes: C08J 5/02 Direct processing of dispersions, e.g. latex, to articles
• CPC Class Codes: C08L 13/02 Latex

Abstract

A polymer latex for making gloves having excellent donning and doffing characteristics comprises a carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate terpolymer. A process for making latex gloves using the polymer latex prepared in accordance with the invention is also disclosed.

Claims

1. A latex glove with improved doffing and donning characteristics, wherein said glove is formed from a carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate latex polymer comprising about 40 to 80 weight % butadiene, about 15 to 45 weight % acrylonitrile, about 2 to 12 weight (meth)acrylate, and about 2 to 10 weight % of a carboxylic acid or a half ester of a dicarboxylic acid.

2. The glove of claim 1, wherein the open chain aliphatic diene is butadiene.

3. The glove of claim 2, wherein the dryness coefficient of the neat glove varies from about 8 to 10.

4. The glove of claim 2 wherein the (meth)acrylate component is a monomer selected from the group consisting of methyl acrylate, methyl methacrylate, butyl acrylate, ethyl acrylate, 2-ethyl hexyl acrylate and mixtures thereof.

5. The glove of claim 1, wherein at least one other latex polymer component selected from the group consisting of acrylics, butyl latex, ethylene-vinyl acetate, carboxylated butadiene styrene, polyurethane, neoprene, and natural rubber is blended with the carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate latex polymer, and wherein the other latex components comprise up to about 25% by weight of the total composition.

6. In a method for preparing a latex glove comprising:

(a) contacting a mold resembling a hand with a coagulant;

(b) removing the mold from the coagulant;

(c) contacting the coagulant coated mold with a latex for a sufficient period of time to form a gelled latex coating of a desired thickness on the mold;

(d) drying the latex coated old;

(e) curing the dried latex coated mold;

(f) removing the finished cured glove from the mold;

the improvement which comprises using a latex comprising a carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate polymer comprising about 40 to 80 weight % butadiene, about 15 to 45 weight % acrylonitrile, about 2 to 12 weight % (meth)acrylate, and about 2 to 10 weight % of a carboxylic acid.

7. The method of claim 6, wherein the open chain aliphatic diene is butadiene.

8. The method of claim 7, wherein the dryness coefficient of the neat glove varies from about 8 to 10.

9. The method of claim 7, wherein the (meth)acrylate component is a monomer selected from the group consisting of methyl acrylate, methyl methacrylate, butyl acrylate, ethyl acrylate, 2-ethyl hexyl acrylate and mixtures thereof.

10. The method of claim 6, wherein at least one other latex polymer component selected from the group consisting of acrylics, butyl latex, ethylene-vinyl acetate, carboxylated butadiene styrene, polyurethane, neoprene, and natural rubber is blended with the carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate latex polymer, and wherein the other latex components comprise up to about 25% by weight of the total composition.

11. A method for imparting improved donning and doffing characteristics to a latex glove, comprising forming the glove from a latex composition comprising a carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate polymer comprising about 40 to 80 weight % butadiene, about 15 to 45 weight % acrylonitrile, about 2 to 12 weight % (meth)acrylate, and about 2 to 10 weight % of a carboxylic acid or a half ester of a dicarboxylic acid.

12. The method of claim 11, wherein the open chain aliphatic diene is butadiene.

13. The method of claim 11, wherein the (meth)acrylate component is a monomer selected from the group consisting of methyl acrylate, methyl methacrylate, butyl acrylate, ethyl acrylate, 2-ethyl hexyl acrylate and mixtures thereof.

14. The method of claim 11, wherein the dryness coefficient of the neat glove varies from about 8 to 10.

15. The method of claim 11, wherein at least one other latex polymer component selected from the group consisting of acrylics, butyl latex, ethylene-vinyl acetate, carboxylated butadiene styrene, polyurethane, neoprene, and natural rubber is blended with the carboxylated open chain aliphatic diene/acrylonitrile/(meth)acrylate latex polymer, wherein the other latex components comprise up to about 25% by weight of the total composition.