Vulcanization composition for reducing allergenic potential and elastomeric articles formed therewith

Patent metadata

Field	Value
Publication number	US-2023416471-A1
Application number	US-202318461248-A
Country	US
Kind code	A1
Filing date	Sep 5, 2023
Priority date	Dec 13, 2017
Publication date	Dec 28, 2023
Grant date	—

Abstract

An elastomeric article having a rubber component comprising polyisoprene and an aldehyde aniline condensate, the elastomeric article having less than 1 ppm diisopropyl xanthogen polysulfide residue.

First claim

1 . A method of making a latex dispersion comprising:
providing a rubber component comprising polyisoprene, and combining the rubber component with a vulcanization composition comprising at least one fugitive dihydrocarbyl xanthogen polysulfide accelerator.

2 . The method according to claim 1 , wherein the vulcanization composition is free of non-fugitive accelerators.

3 . The method according to claim 1 , wherein the vulcanization composition is free of dithiocarbamates, thiurams, thiazoles, guanidines, or thioureas as accelerators.

4 . The method according to claim 1 , wherein the vulcanization composition comprises only one fugitive dihdrocarbyl xanthogen polysulfide accelerator and further comprises only one aldehyde-aniline condensate, and
wherein the composition is free of additional compounds that function as accelerators for vulcanizing elastomers.

5 . The method according to claim 1 , wherein:
the vulcanization composition further comprises a source of sulfur, wherein the source of sulfur comprises elemental sulfur, the at least one fugitive dihydrocarbyl xanthogen polysulfide accelerator comprises diisopropyl xanthogen polysulfide, the vulcanization composition further comprises at least one aldehyde-aniline condensate, wherein the aldehyde-aniline condensate comprises heptaldehyde-aniline, and the vulcanization composition further comprises a metal oxide selected from the group consisting of zinc oxide, magnesium oxide, lead oxide, and combinations thereof.

6 . The method according to claim 1 , wherein:
the vulcanization composition further comprises a source of sulfur selected from the group consisting of elemental sulfur, sulfur donors that have a low allergenic potential, and combinations thereof, and the at least one fugitive dihydrocarbyl xanthogen polysulfide accelerator is selected from the group consisting of diisopropyl xanthogen polysulfide, diisopropyl xanthogen disulfide, diisopropyl xanthogen trisulfide, diisopropyl xanthogen tetrasulfide, diisopropyl xanthogen pentasulfide, diisoamyl xanthogen trisulfide, diisoamyl xanthogen tetrasulfide, diisoamyl xanthogen pentasulfide, diethyl xanthogen tetrasulfide, dibutyl xanthogen tetrasulfide, dibutyl xanthogen disulfide, and combinations thereof.

7 . The method according to claim 1 , wherein the vulcanization composition is free of additional xanthate compounds.

8 . A coating composition for an elastomeric article, comprising:
a latex dispersion comprising:
polyisoprene, and
a vulcanization composition comprising a source of sulfur, diisopropyl xanthogen polysulfide, heptaldehyde-aniline, and a metal oxide;
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.

9 . The coating composition of claim 8 , wherein a total solids content of the coating composition is from about 3% to about 15%.

10 . The coating composition of claim 8 , wherein the second polymer latex is nitrile rubber or synthetic polyisoprene.

11 . The coating composition of claim 8 , wherein the vulcanization composition is free of non-fugitive accelerators.

12 . The coating composition of claim 8 , wherein the vulcanization composition is free of dithiocarbamates, thiurams, thiazoles, guanidines, or thioureas as accelerators.

13 . The coating composition of claim 8 , wherein the source of sulfur is selected from the group consisting of elemental sulfur, sulfur donors that have a low allergenic potential, and combinations thereof.

14 . The coating composition of claim 8 , wherein the metal oxide is selected from the group consisting of zinc oxide, magnesium oxide, lead oxide, and combinations thereof.

15 . A coated elastomeric article comprising:
an elastomeric article comprising a first polymer latex; and a coating formed from a coating composition comprising:
a latex dispersion comprising:
polyisoprene, and
a vulcanization composition comprising a source of sulfur, diisopropyl xanthogen polysulfide, heptaldehyde-aniline, and a metal oxide;

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.

16 . The coated elastomeric article of claim 15 , wherein the first polymer latex comprises polychloroprene.

17 . The coated elastomeric article of claim 15 , wherein the first polymer latex comprises a polyisoprene.

18 . The coated elastomeric article of claim 15 , wherein the vulcanization composition is free of non-fugitive accelerators.

19 . The coated elastomeric article of claim 15 , wherein the vulcanization composition is free of dithiocarbamates, thiurams, thiazoles, guanidines, or thioureas as accelerators.

20 . The coated elastomeric article of claim 15 , wherein a total solids content of the coating composition is from about 3% to about 15%.

Assignees

• Allegiance Corp

Inventors

• Chen Seong Fong
• Wong Wei Cheong

Classifications

• C08K2201/019

  the composition being defined by the absence of a certain additive · CPC title

• A41D19/0055

  Plastic or rubber gloves · CPC title

• C08L15/02

  Rubber derivatives containing halogen · CPC title

• C08J7/126

  Halogenation · CPC title

• C08K5/18

  with aromatically bound amino groups · CPC title