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Glove having butyl rubber layer to provide resistance to ketone family chemicals

a butyl rubber and solvent technology, applied in gloves, coatings, garments, etc., can solve the problems of not using different materials to enhance, and using butyl layers to provide solvent resistance to ketone family chemicals, and achieve superior or much improved solvent resistance. , good resistance

Inactive Publication Date: 2007-07-12
TAO JIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a three-layer laminate glove that has good resistance to chemicals like acetone and MEK. It also has better resistance to solvents like DMSO and chloroform compared to existing thin wall gloves. The thickness of the butyl layer affects the time it takes for the material to break through after exposure to a ketone family solvent.

Problems solved by technology

None of these published patent applications discloses the use of different materials to enhance resistance to chemical solvents and none uses a butyl layer to provide resistance to ketone family solvents.

Method used

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  • Glove having butyl rubber layer to provide resistance to ketone family chemicals
  • Glove having butyl rubber layer to provide resistance to ketone family chemicals

Examples

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Embodiment Construction

[0011] A three-layered sandwich structure shown in FIG. 1 contains an outer layer of nitrile rubber 10, a middle layer of butyl rubber 20 and an inner layer of nitrile rubber 30. This structure provides a resistance to ketone family member solvents. It is possible that other layers of other materials may be added or the three-layered sandwich structure may be repeated.

[0012] The formulation of each layer is as follows:

Nitrile LayersButyl LayerBase100parts100partsZinc Oxide1part5parts(Primary activator)Sulfur (crosslinker)1part3partsZDBC (accelerator)1part2partsTitanium Dioxide1part0parts(optional)BHT (antioxidant)1part1partColor pigment0parts0parts(optional)

The base of the nitrile layer may be natural rubber latex or nitrile. Throughout the specification, the term ‘nitrile’ is used to encompass these two materials. The base for the butyl layer is butyl latex.

[0013] Laminates made in accordance with the invention have demonstrated the following resistance:

AcetoneButyl layerTot...

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Abstract

A laminate of three layers includes a middle butyl rubber layer, whereas the inner layer and outer layer materials could be chosen from natural rubber latex, carboxylated acrylonitrile butadiene rubber latex, polychloroprene, polyisoprene, carboxylated styrene butadiene, and other synthetic elastomers. Even with one material used for both inner layer and outer layer, different formulations could be used. The resultant multilayer structure provides good resistance to ketone family chemicals such as acetone and MEK. The glove also exhibits superior or much improved resistance to solvent such as DMSO, chloroform, methanol, et al as compared to currently commercially available thin wall gloves made from natural rubber latex and carboxylated acrylonitrile butadiene synthetic rubber latex. The time elapsed before the material experiences breakthrough after exposure to a ketone family solvent is directly related to the thickness of the butyl layer.

Description

BACKGROUND OF THE INVENTION [0001] Gloves are used for their barrier characteristics to protect the wearer from chemicals and contamination. The structure and composition of the glove must be resistant to contamination to prevent contact with the wearer's skin. The structure and material of the glove can be tailored to provide protection from anticipated contaminants. [0002] Published patent applications disclose the structure of gloves resistant to solvents. One such published patent application is 2003 / 0075828 to Thomas et al disclosing a solid resistant glove formed from multilayers having an elastomeric substrate comprising nitrile rubber. Other published patent applications, 2004 / 0036196 to Conley and 2004 / 0107477 to Janssen, disclose surgical or medical gloves made from nitrile rubber and impermeable to many solvents. None of these published patent applications discloses the use of different materials to enhance resistance to chemical solvents and none uses a butyl layer to pr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A41D19/00
CPCA41D19/0055C08L9/02C09D123/22
Inventor TAO, JIAN
Owner TAO JIAN
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