Vulcanization composition having reduced allergenic potential, and elastomeric articles formed therewith

Patent metadata

Field	Value
Publication number	US-2017145185-A1
Application number	US-201615375351-A
Country	US
Kind code	A1
Filing date	Dec 12, 2016
Priority date	Jun 25, 2010
Publication date	May 25, 2017
Grant date	—

Abstract

The present invention generally relates to vulcanization compositions used to vulcanize elastomeric articles, where the vulcanization compositions have reduced allergenic potential as compared to elastomeric articles formed using vulcanization compositions having non-fugitive accelerators. The present invention also relates to elastomeric articles formed using the vulcanization compositions. The invention further relates to methods for making a reduced-allergenicity vulcanization composition, and to methods for using the vulcanization compositions to vulcanize elastomeric articles.

First claim

We claim:

1 . A vulcanization composition comprising:
a source of sulfur, a single fugitive xanthate accelerator, and a metal oxide, where the composition does not include any additional compounds that function as accelerators for vulcanizing elastomers.

2 . A vulcanization composition comprising:
elemental sulfur, diisopropyl xanthogen polysulfide as the sole fugitive accelerator, and a metal oxide, where the composition does not include any additional compounds that function as accelerators for vulcanizing elastomers.

3 . A vulcanization composition consisting of:
elemental sulfur, diisopropyl xanthogen polysulfide, and a metal oxide.

4 . The vulcanization composition of one of claims 1 - 3 , wherein the vulcanization composition exhibits reduced allergenicity as compared to conventional vulcanization compositions.

5 . The vulcanization composition of one of claims 1 - 3 , wherein the metal oxide is selected from the group consisting of zinc oxide, magnesium oxide, lead oxide, and combinations thereof.

6 . The vulcanization composition of claim 1 , wherein the source of sulfur is selected from the group consisting of elemental sulfur and sulfur donors that have a low allergenic potential, and combinations thereof.

7 . The vulcanization composition of claim 1 , wherein the single fugitive xanthate accelerator is selected from the group consisting of diisopropyl xanthogen polysulfide, dibutyl xanthogen disulfide, and diisopropyl xanthogen disulfide.

8 . A method for forming the vulcanization composition of one of claims 1 - 3 , comprising:
providing a source of sulfur, providing a single fugitive xanthate, providing a metal oxide, and mixing the source of sulfur, single fugitive xanthate, and metal oxide, where the method for forming the vulcanization composition does not include any additional compounds that function as accelerators for vulcanizing elastomers.

9 . A latex dispersion comprising:
polychloroprene, and a vulcanization composition consisting of:
elemental sulfur,
diisopropyl xanthogen polysulfide, and
a metal oxide,
where the latex dispersion does not include any additional compounds that function as accelerators for vulcanizing elastomers.

10 . A method for preparing a reduced-allergenicity polychloroprene elastomeric article, comprising:
providing the latex dispersion of claim 9 , coating a former with the latex dispersion by coagulant dipping to form a first elastomeric layer, and drying and vulcanizing the first elastomeric layer.

11 . The method of claim 10 , further comprising:
coating the former coated with the first elastomeric layer with a second latex dispersion to form a second elastomeric layer, wherein the second elastomeric layer is applied prior to drying and vulcanizing the first elastomeric layer.

12 . The method of claim 11 , wherein the second elastomeric layer has the same composition as the first elastomeric layer.

13 . The method of claim 11 , wherein the second elastomeric layer has a different composition from the first elastomeric layer.

14 . The method of claim 13 , wherein the second elastomeric layer is formed from a latex dispersion further comprising a second polymer latex selected from the group consisting of natural rubber, polyurethane, polybutadiene, polychloroprene, nitrile rubber, block copolymers of styrene and butadiene, block copolymers of styrene and isoprene, and synthetic polyisoprene.

15 . A coating composition for an elastomeric article, comprising:
the polychloroprene latex dispersion of claim 9 ; a second polymer latex selected from the group consisting of natural rubber, polyurethane, polybutadiene, polychloroprene, nitrile rubber, block copolymers of styrene and butadiene, block copolymers of styrene and isoprene, and synthetic polyisoprene; and water, wherein the total solids content of the coating composition is from about 3% to about 15%.

16 . The coating composition of claim 15 , wherein the second polymer latex is selected from the group consisting of nitrile and synthetic polyisoprene.

17 . An elastomeric article formed using the vulcanization composition of one of claims 1 - 3 , where the elastomeric article does not include any additional compounds that function as accelerators for vulcanizing elastomers.

18 . An elastomeric article formed using the latex dispersion of claim 9 , where the elastomeric article does not include any additional compounds that function as accelerators for vulcanizing elastomers.

19 . An elastomeric article formed using the coating composition of claim 15 , where the elastomeric article does not include any additional compounds that function as accelerators for vulcanizing elastomers.

20 . The elastomeric article of claim 17 , wherein the elastomeric article exhibits reduced allergenicity as compared to elastomeric articles formed using conventional accelerators.

21 . The elastomeric article of claim 17 , wherein the elastomeric article is selected from the group consisting of gloves, probe covers, finger cots, catheters, dental dams, and condoms.

22 . The elastomeric article of claim 17 , wherein the elastomeric articles are powder free.

23 . A vulcanization composition comprising:
a source of sulfur, one or more fugitive xanthate accelerators, and a metal oxide, where the composition does not include any non-fugitive accelerators.

24 . A vulcanization composition comprising:
elemental sulfur, diisopropyl xanthogen polysulfide as a fugitive accelerator, and a metal oxide, where the composition does not include any non-fugitive accelerators.

25 . The vulcanization composition claim 23 or 24 , wherein the vulcanization composition exhibits reduced allergenicity as compared to conventional vulcanization compositions.

26 . The vulcanization composition of claim 23 or 24 , wherein the metal oxide is selected from the group consisting of zinc oxide, magnesium oxide, lead oxide, and combinations thereof.

27 . The vulcanization composition of claim 23 or 24 , wherein the source of sulfur is selected from the group consisting of elemental sulfur and sulfur donors that have a low allergenic potential, and combinations thereof.

28 . The vulcanization composition of claim 23 , wherein the fugitive xanthate accelerator is selected from the group consisting of diisopropyl xanthogen polysulfide, dibutyl xanthogen disulfide, and diisopropyl xanthogen disulfide.

29 . A method for forming the vulcanization composition claim 23 or 24 , comprising:
providing a source of sulfur,
providing one or more fugitive xanthate,
providing a metal oxide, and
mixing the source of sulfur, one or more fugitive xanthate, and metal oxide, where the method for forming the vulcanization composition does not include any non-fugitive accelerators.

30 . A latex dispersion comprising:
polychloroprene, and a vulcanization composition consisting of:
elemental sulfur,
diisopropyl xanthogen polysulfide, and
a metal oxide,
where the latex dispersion does not include any non-fugitive accelerators.

31 . A method for preparing a reduced-allergenicity polychloroprene elastomeric article, comprising:
providing the latex dispersion of claim 30 , coating a former with the latex dispersion by coagulant

Assignees

• Allegiance Corp

Inventors

• Chen Seong Fong
• Wong Wei Cheong
• Low Chi Yih

Classifications

• C08K5/0025 Primary

  Crosslinking or vulcanising agents; including accelerators · CPC title

• C08K2003/2296

  of zinc · CPC title

• B29K2011/00

  Use of rubber derived from chloroprene as moulding material · CPC title

• Y10T428/3183

  Next to second layer of natural rubber · CPC title

• B29C41/14

  Dipping a core {(B29C41/10 takes precedence)} · CPC title