Polymer blends of nitrile rubber and polychloroprene

Patent metadata

Field	Value
Publication number	US-10626283-B2
Application number	US-201414542700-A
Country	US
Kind code	B2
Filing date	Nov 17, 2014
Priority date	Nov 19, 2013
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

Polymer compositions including blends of approximately 90 to approximately 60 percent by weight acrylonitrile butadiene copolymer and approximately 10 to approximately 40 percent by weight polychloroprene copolymer are disclosed. Methods for manufacturing unsupported gloves and for supported gloves including a knitted liner with the polymer compositions, producing gloves having an ANSI abrasion resistance level 4, are also disclosed.

First claim

What is claimed is:

1. A polymer composition comprising a blend of approximately 80 to approximately 70 parts per hundred rubber (phr) acrylonitrile butadiene copolymer and approximately 20 to approximately 30 phr polychloroprene copolymer, wherein the polymer composition comprises:
anti-flocculant in an amount of 0.2 phr to 1.0 phr;
sulfur in an amount of 0.5 to 3.0 phr;
activator in an amount of 2.0 to 2.7 phr; and
accelerator in an amount of 0.5 to 1.0 phr.

2. The polymer composition of claim 1 , wherein the acrylonitrile butadiene copolymer comprises acrylonitrile in an amount of between 35% to 40% by weight.

3. The polymer composition of claim 1 , wherein the polychloroprene copolymer comprises chloroprene and sulfur.

4. The polymer composition of claim 1 , wherein the amount of acrylonitrile butadiene copolymer is approximately 70 phr, and the amount of chloroprene copolymer is approximately 30 phr.

5. The polymer composition of claim 1 , further comprising at least one of a thixotropic agent, a vulcanizing agent, surfactant, or a pigment.

6. The polymer composition of claim 1 , wherein a pH of the composition ranges from approximately 9.5 to 10.0 before addition of a pH adjustment.

7. The polymer composition of claim 1 , further comprising potassium hydroxide.

8. The polymer composition of claim 1 , further comprising potassium hydroxide in an amount of 0.1 to 1.0 phr.

9. The polymer composition of claim 1 , wherein the anti-flocculant is present in an amount of 0.2 phr.

10. The polymer composition of claim 1 , wherein the accelerator is present in an amount of 0.5 phr.

11. The polymer composition of claim 1 , wherein the activator is zinc oxide (ZnO).

12. A glove, comprising:
a knitted liner; and
a coating disposed on the knitted liner comprising an elastomeric component having 80 to 70 parts per hundred rubber (phr) acrylonitrile butadiene copolymer, and from 20 to 30 phr polychloroprene copolymer, wherein the coating further comprises:
activator in an amount of 2.0 to 2.7 phr;
sulfur in an amount of 0.5 to 3.0 phr; and
accelerator in an amount of 0.5 to 1.0 phr, wherein the coating is substantially-free of anti-flocculant, and wherein the glove has an ANSI abrasion level of 4.

13. The glove of claim 12 , wherein the elastomeric component further comprises potassium hydroxide in an amount of 0.1 to 1.0 phr.

14. The glove of claim 12 , wherein the anti-flocculant is present in an amount of 0.2 phr.

15. The glove of claim 12 , wherein the sulfur is present in an amount of 0.5 phr.

16. The glove of claim 12 , wherein the activator is zinc oxide (ZnO).

17. The glove of claim 12 , wherein the accelerator is ZDBC present in an amount of 0.5 to 1.0 phr.

18. The glove of claim 12 , wherein the coating is cured.

19. A glove, comprising:
a knitted liner; and
a coating disposed on the knitted liner comprising an elastomeric component having 80 to 70 parts per hundred rubber (phr) acrylonitrile butadiene copolymer, and from 20 to 30 phr polychloroprene copolymer, wherein the polychloroprene copolymer comprises chloroprene and sulfur, and wherein the coating further comprises:
0.2 phr to less than 1.0 phr anti-flocculant;
activator in an amount of 2.0 to 2.7 phr;
potassium hydroxide in an amount of 0.1 to 1.0 phr;
between 0.5 to 3.0 phr sulfur; and
between 0.5 to 1.0 phr accelerator, wherein the glove has an ANSI abrasion level of 4.

20. The glove of claim 19 , wherein the coating is cured.

Assignees

• Ansell Ltd

Inventors

• Mercado Agustin Portillo
• Gonzalez Miguel Angel Sanchez
• Dominguez Fernando
• Urenda Marco Antonio Carrillo

Classifications

• C09D109/02 Primary

  Copolymers with acrylonitrile · CPC title

• C08L9/02

  Copolymers with acrylonitrile · CPC title

• A41D19/04

  Appliances for making gloves; Measuring devices for glove-making · CPC title

• C08L9/04 Primary

  Latex · CPC title

• A41D19/001

  Linings · CPC title