Chemical resistant article

Claim 2

A multi-layered article of clothing comprising, in combination, an inner layer of a resilient elastomer selected from the group consisting of natural rubber, polyacrylate, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene and polychloroprene and an outer layer of a butyl rubber completely covering and integral with the inner layer, said inner layer having a high affinity for a toxic chemical vapor and being impermeable to said toxic chemical vapor, and said outer butyl rubber layer being substantially impermeable to a toxic chemical liquid and having a low toxic chemical vapor permeability, thereby providing high resistance to toxic chemical in liquid and vapor form.

Claim 3

A article as defined in claim 1, wherein said inner layer is deposited from a latex.

Claim 4

An article as defined in claim 2, wherein the rubber latex is selected from the group consisting of natural and polychloroprene rubber latex.

Claim 5

An article as defined in claim 1, wherein the outer layer is deposited from a butyl rubber latex.

Claim 6

An article as defined in claim 4, wherein the butyl rubber latex is a dispersion in water of a butyl rubber composition consisting of: ______________________________________ PARTS BY DRY WEIGHT ______________________________________ butyl rubber latex 100 sulphur 0.5 to 5.0 zinc dibutyldithiocarbamate 0.1 to 5.0 zinc oxide 3 to 8 dithiocarbamate rubber accelerator 0.1 to 5.0 ______________________________________

Claim 7

An article as defined in claim 4 or 5, wherein the butyl rubber is selected from the group consisting of bromo-butyl rubber and chloro-butyl rubber.

Claim 8

An article as defined in claim 1, wherein the outer layer is deposited from a solution of said butyl rubber in a suitable volatile organic solvent.

Claim 9

An article as defined in claim 7, wherein said solution is a solution in xylene of a butyl rubber composition consisting of ______________________________________ PARTS BY DRY WEIGHT ______________________________________ butyl rubber 100 zinc oxide 3 to 8 stearic acid 0.1 to 2.0 antioxidant 0.3 to 3.0 coumarone-indene resin 0 to 15.0 magnesium silicate filler 0 to 100 zinc diethyl dithiocarbamate 0.1 to 3.0 ______________________________________

Claim 10

An article as defined in claim 8, wherein said butyl rubber is selected from bromo-butyl rubber and chloro-butyl rubber.

Claim 11

A multi-layered article of clothing comprising, in combination, a moisture absorptive reinforcing substrate, an inner layer of a resilient elastomer selected from the group consisting of natural rubber, polyacrylate, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene and polychloroprene, which elastomer adheres to but does not penetrate said substrate while substantially completely covering said substrate, and an outer layer of a butyl rubber substantially completely covering and integral with said inner layer, said inner layer having a high affinity for a toxic chemical vapor and being impermeable to said toxic chemical vapor, and said outer butyl rubber layer being substantially impermeable to a toxic chemical liquid and having a low toxic chemical vapor permeability, thereby providing high resistance to toxic chemicals in liquid and vapor form.

Claim 12

A multi-layered article of clothing comprising, in combination, a moisture absorptive reinforcing substrate, an inner layer of a resilient elastomer selected from the group consisting of natural rubber, polyacrylate, polybutadiene, styrene-butadiene copolymer, acrylonitrile-butadiene and polychloroprene, which elastomer adheres to but does not penetrate said substrate while substantially completely covering said substrate, and an outer layer of a butyl rubber substantially completely covering and integral with said inner layer, said inner layer having a high affinity for a toxic chemical vapor and being impermeable to said toxic chemical vapor, and said outer butyl rubber layer being substantially impermeable to a toxic chemical liquid and having a low toxic chemical vapor permeability, thereby providing high resistance to toxic chemicals in liquid and vapor form.

Claim 13

An article as defined in claim 10, wherein the substrate comprises a resilient fabric having stretch in two directions, precut and formed in the shape of a glove.

Claim 14

An article as defined in claim 11, wherein said fabric is a knitted cotton fabric having an interlocked structure.

Claim 15

An article as defined in claim 10, wherein said inner layer is deposited from a latex.

Claim 16

An article as defined in claim 13, wherein the latex is selected from the group consisting of natural and polychloroprene rubber latex.

Claim 17

An article as defined in claim 10, wherein the outer layer is deposited from a butyl rubber latex.

Claim 18

An article as defined in claim 15, wherein the butyl rubber latex is a dispersion in water of a butyl rubber composition consisting of ______________________________________ PARTS BY DRY WEIGHT ______________________________________ a butyl rubber 100 sulphur 0.5 to 5.0 zinc dibutyldithiocarbamate 0.1 to 5.0 zinc oxide 3 to 8 dithiocarbamate rubber accelerator 0.1 to 5.0 ______________________________________

Claim 19

An article as defined in claim 10, wherein the outer layer is deposited from a solution of said butyl rubber in a suitable volatile organic solvent, said butyl rubber having the composition ______________________________________ PARTS BY DRY WEIGHT ______________________________________ butyl rubber 100 zinc oxide 3 to 8 stearic acid 0.1 to 2.0 antioxidant 0.1 to 3.0 coumarone-indene resin 0 to 15.0 magnesium silicate filler 0 to 100 zinc diethyl dithiocarbamate 0.1 to 3.0 ______________________________________

Claim 20

An article as defined in claim 17, wherein said butyl rubber is selected from the group consisting of bromo-butyl rubber and chloro-butyl rubber.

Claim 21

An article as defined in claim 1, 16 or 17, wherein the thickness of said butyl rubber layer is about 0.03 inches.