Breach or contamination indicating article, optionally with pre-warning indicator

Patent metadata

Field	Value
Publication number	US-10065210-B2
Application number	US-201514736830-A
Country	US
Kind code	B2
Filing date	Jun 11, 2015
Priority date	Jun 12, 2014
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

Provided, among other things, is a breach or contamination indicating elastomeric article for indicating a breach or contamination by a selected chemical or group of chemicals, the article having an exterior and interior and comprising: (1) an interior elastomeric layer selected to resist permeation by the selected chemical(s); and (2) exterior thereto, a contiguous or dis-contiguous first indicating layer comprising a dye or pigment and an opacifying agent, the dye or pigment providing the layer with color, the first indicating layer changing color and/or opacity when contacted with a selected chemical such regions of the article where the layer is so contacted contrast with non-contacted regions. A subsequent, interior layer can provide a safety buffer allowing for removal or disposal prior to any potential for harm. A second, interior indicating layer can be used to make the warning louder when a serious breach is occurring.

First claim

What is claimed is:

1. A breach or contamination indicating elastomeric article for indicating a breach or contamination by one or more organic solvents, the article having an exterior and interior and comprising:
an interior elastomeric layer configured to resist permeation by the one or more organic solvents; and
exterior thereto, a contiguous or dis-contiguous polymeric first indicating layer comprising layer-forming polymer(s), a first dye or pigment and one or more opacifying agents, the dye or pigment and opacifying agents dispersed in the first indicating layer, the dye or pigment providing the first indicating layer with color, the first indicating layer changing color tone when contacted with the one or more organic solvents such that regions of the article where the first indicating layer is so contacted contrast with non-contacted regions, wherein the first indicating layer is formed of the layer-forming polymer(s), which polymers are configured to be swellable when contacted with xylene, butyl acetate, Methyl Isobutyl Ketone (MIBK), acetone and toluene, wherein the one or more opacifying agents comprise a wax with a melting point of about 75° C. or higher and an opacifying pigment.

2. The breach or contamination indicating elastomeric article of claim 1 , further comprising a contiguous or dis-contiguous interior polymeric indicating layer, situated interior to the interior elastomeric layer, which interior indicating layer comprises particles of a lysochrome dye directly embedded in the polymer of the interior indicating layer, the particles configured to provide separate points of coloration to provide a visual warning to a user as the one or more organic solvents penetrates to contact lysochrome dye particles.

3. The breach or contamination indicating elastomeric article of claim 2 , wherein the interior indicating layer anchors fibers for an interior liner, the fibers configured to improve comfort for a user and/or moisture dispersion from a user.

4. The breach or contamination indicating elastomeric article of claim 3 , wherein the fibers comprise about 55-80% wt. hydrophobic flock, and about 20-45% hydrophilic flock.

5. The breach or contamination indicating elastomeric article of claim 3 , further comprising an exterior elastomeric layer, situated exterior to the polymeric first indicating layer, the exterior elastomeric layer configured to resist penetration by the one or more organic solvent(s).

6. The breach or contamination indicating elastomeric article of claim 5 , wherein the one or more opacifying agents comprise a wax with a melting point of about 75° C. or higher and an opacifying pigment.

7. The breach or contamination indicating elastomeric article of claim 2 , further comprising an exterior elastomeric layer, situated exterior to the polymeric first indicating layer, the exterior elastomeric layer configured to resist penetration by the one or more organic solvents.

8. The breach or contamination indicating elastomeric article of claim 7 , wherein the one or more opacifying agents comprise a wax with a melting point of about 75° C. or higher and an opacifying pigment.

9. The breach or contamination indicating elastomeric article of claim 1 , wherein polymeric first indicator layer polymers include 25% or more by weight of thermoplastic acrylic polymer.

10. The breach or contamination indicating elastomeric article of claim 1 , wherein the opacifying pigment comprises a white inorganic pigment.

11. The breach or contamination indicating elastomeric article of claim 1 , wherein the interior elastomeric layer comprises a second dye or pigment that enhances visual impact when color tone from the polymeric first indicating layer is changed by interaction of the first indicating layer with solvent.

12. The breach or contamination indicating elastomeric article of claim 1 , further comprising an exterior elastomeric layer, situated exterior to the first indicating layer, the exterior elastomeric layer configured to resist penetration by the one or more organic solvent(s).

13. The breach or contamination indicating elastomeric article of claim 1 , which article is a contamination indicating article and is a patch or band.

14. A method of making an article of claim 1 , comprising:
dipping a former into a polymer dispersion for forming an elastomeric layer;
thereafter dipping the former into a polymer dispersion comprising the dye and the one or more opacifying agents for forming the first indicating layer;
between the elastomeric layer dip and the first indicating layer dip, dipping the former into primer comprising wax and diluted acid; and
vulcanizing the formed indicating layer and elastomeric layer to form the breach or contamination indicating elastomeric article.

15. A breach or contamination indicating elastomeric article for indicating a breach or contamination by one or more organic solvents, the article having an exterior and interior and comprising:
a first elastomeric layer configured to resist permeation by the one or more organic solvents;
interior thereto, a contiguous or dis-contiguous interior polymeric indicating layer, which interior indicating layer comprises particles of a lysochrome dye directly embedded in the polymer of the interior indicating layer, the particles configured to provide separate points of coloration to provide a visual warning to a user as the one or more organic solvents penetrate to contact lysochrome dye particles;
wherein the interior indicating layer anchors fibers for an interior liner, the fibers configured to improve comfort for a user and/or moisture dispersion from a user; and
wherein the interior polymeric indicating layer is the most interior polymeric layer.

16. A method of making an article of claim 15 , comprising:
dipping a former into a polymer dispersion for forming the elastomeric layer;
thereafter dipping the former into a polymer dispersion comprising the lysochrome dye particles to form the interior polymeric indicating layer, wherein, the fibers are applied as part of a composite dispersion of fibers and polymers along with the lysochrome dye particles; and
vulcanizing the formed indicating layer and elastomeric layer to form the breach or contamination indicating elastomeric article.

17. The method of claim 16 , further comprising, between forming the elastomeric layer by dipping and forming the interior polymeric indicating layer by dipping, dipping the former into primer comprising wax and diluted acid.

18. A method of forming an indicating layer for a breach or contamination indicating elastomeric article comprising:
dipping a former into a polymer dispersion for forming an elastomeric layer;
thereafter dipping the former into a primer comprising wax and diluted acid;
thereafter dipping the former into a polymer dispersion comprising lysochrome dye for forming the indicating layer; and
vulcanizing the formed indicating layer and elastomeric layer to form the breach or contamination indicating elastomeric article.

Assignees

• Ansell Ltd

Inventors

• Hassan Noorman Abu
• Shani Fazli Bin
• Nazareth Darryl

Classifications

• A41D19/0058

  Three-dimensional gloves · CPC title

• G01N31/22

  using chemical indicators (G01N31/02 takes precedence) · CPC title

• G01M3/12 Primary

  by observing elastic covers or coatings, e.g. soapy water · CPC title

• B05D1/18 Primary

  performed by dipping · CPC title