Protective garments

Patent metadata

Field	Value
Publication number	US-11180643-B2
Application number	US-201816476130-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Feb 20, 2017
Publication date	Nov 23, 2021
Grant date	Nov 23, 2021

Abstract

Provided among other things is an polymeric protective garment comprising a layer of carboxylated polymer that incorporates an alumina-silica composition, thus forming a silica alumina polymer composite.

First claim

The invention claimed is:

1. A polymeric protective garment comprising a layer of carboxylated polymer that incorporates an alumina-silica composition such that the polymer is crosslinked with an alumina-silica network, such that the layer is a silica alumina polymer composite, wherein the layer has a breakthrough time greater than that of a comparable layer without the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured with respect to one or more of n-hexane, methanol, or sulfuric acid.

2. The polymeric protective garment of claim 1 , wherein the carboxylated polymer layer has a breakthrough time about equal to or greater than that of a comparable layer which comparable layer has about 1.5 times the thickness of the carboxylated polymer layer and lacks the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured with respect to one or more of n-hexane, methanol, or sulfuric acid.

3. The polymeric protective garment of claim 1 , wherein the layer has a breakthrough time about twice or greater than that of a comparable layer without the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured with respect to one or more of n-hexane, methanol, or sulfuric acid.

4. The polymeric protective garment of claim 1 , wherein the layer has an abrasion resistance greater than that of a comparable layer without the composite silica alumina, as measured by EN388:16 2016.

5. The polymeric protective garment of claim 1 , wherein the layer has an abrasion resistance about twice or greater than that of a comparable layer without the composite silica alumina, as measured by EN388:16 2016.

6. The polymeric protective garment of claim 1 , wherein the carboxylated polymer comprises more than 50% by weight of carboxylated acrylonitrile butadiene.

7. The polymeric protective garment of claim 1 , wherein the garment is unsupported.

8. The polymeric protective garment of claim 7 , wherein the garment is a glove.

9. The polymeric protective garment of claim 1 , wherein the layer of carboxylated polymer is dip-formed.

10. The polymeric protective garment of claim 9 , wherein the garment is unsupported.

11. The polymeric protective garment of claim 10 , wherein the garment is a glove.

12. A method of forming the polymeric protective garment of claim 1 by forming the carboxylated polymer layer comprising:
A. forming a silica-alumina carboxylated polymer;
B. forming silica-alumina crosslinks in the carboxylated polymer; and
C. forming the polymer layer with the silica-alumina crosslinked polymer.

13. The method of forming the polymeric protective garment of claim 12 by forming the carboxylated polymer layer comprising:
wherein step A comprises adding (a) a water-based crosslinker comprising a mixture of aluminum oxide, base and a polyhydric alcohol to (b) a water-based silica dispersion and mixing for a period of time to form a first resultant mixture; and
wherein steps A and B comprise:
adding the first resultant mixture to a composition comprising a carboxylated polymer latex to form a third mixture; and
forming the polymer layer from the third mixture.

14. The method of forming the polymeric protective garment of claim 13 , further comprising:
forming the carboxylated polymer latex composition by adding to a carboxylated polymer latex a separate portion of the water-based crosslinker, and mixing for a period of time.

15. The polymeric protective garment of claim 6 , wherein the carboxylated polymer layer has a breakthrough time about equal to or greater than that of a comparable layer which comparable layer has about 1.5 times the thickness of the carboxylated polymer layer and lacks the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured with respect to one or more of n-hexane, methanol, or sulfuric acid.

16. The polymeric protective garment of claim 6 , wherein the layer has a breakthrough time about twice or greater than that of a comparable layer without the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured with respect to one or more of n-hexane, methanol, or sulfuric acid.

17. The polymeric protective garment of claim 6 , wherein the layer has an abrasion resistance greater than that of a comparable layer without the composite silica alumina, as measured by EN388:16 2016.

18. The polymeric protective garment of claim 6 , wherein the layer has an abrasion resistance about twice or greater than that of a comparable layer without the composite silica alumina, as measured by EN388:16 2016.

19. The polymeric protective garment of claim 6 , wherein the layer has a breakthrough time greater than that of a comparable layer without the composite silica alumina, as measured by EN374-3 2003, wherein breakthrough time measured separately with respect to n-hexane, methanol, and sulfuric acid.

Assignees

• Ansell Ltd

Inventors

• Hassan Noorman Abu
• Ujar Ahmad Helmi
• Mustaffa Zam Rizal
• Shani Fazli Bin
• Wan Ahmad Wan Ashruzi Bin

Classifications

• B29C41/003

  characterised by the choice of material · CPC title

• B29K2509/08

  Glass · CPC title

• A41D19/01505

  resistant to mechanical aggressions, e.g. cutting. piercing · CPC title

• B29K2035/00

  Use of polymers of unsaturated polycarboxylic acids {or derivatives thereof} as moulding material · CPC title

• B29L2031/4864

  Gloves · CPC title