Method for manufacturing gloves

Patent metadata

Field	Value
Publication number	US-11065788-B2
Application number	US-201716079225-A
Country	US
Kind code	B2
Filing date	Feb 24, 2017
Priority date	Feb 25, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A method for producing a glove includes a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal, and a step of irradiating the dip-molded layer with radiation.

First claim

The invention claimed is:

1. A method for producing a glove, comprising:
a step of forming a dip-molded layer by dip-molding a latex composition containing a latex of a carboxyl group-containing conjugated diene rubber (A) that does not have an isoprene-derived monomer unit, and a metal compound (B) including a divalent or higher metal; and
a step of irradiating the dip-molded layer with γ-rays so as to cross-link a carbon-carbon double bond moiety of a conjugated diene monomer unit of the carboxyl group-containing conjugated diene rubber (A),
wherein the carboxyl group-containing conjugated diene rubber (A) is at least one selected from the group consisting of a carboxyl group-containing nitrile rubber (a1), a carboxyl group-containing styrene-butadiene rubber (a2), and a carboxyl group-containing butadiene rubber (a3),
wherein the carboxyl group-containing nitrile rubber (a1) is obtained by copolymerizing a monomer mixture containing a conjugated diene monomer, an ethylenically unsaturated carboxylic acid monomer, and an ethylenically unsaturated nitrile monomer, and is substantially free from an isoprene-derived monomer unit,
wherein the carboxyl group-containing styrene-butadiene rubber (a2) is obtained by copolymerizing a monomer mixture containing 1,3-butadiene, an ethylenically unsaturated carboxylic acid monomer and styrene, and is substantially free from an isoprene-derived monomer unit, and
wherein the carboxyl group-containing butadiene rubber (a3) is obtained by copolymerizing a monomer mixture containing a conjugated diene monomer and an ethylenically unsaturated carboxylic acid monomer, and is substantially free from an isoprene-derived monomer unit.

2. The method for producing a glove according to claim 1 , wherein the metal compound (B) including a divalent or higher metal comprises a metal compound including a trivalent or higher metal.

3. The method for producing a glove according to claim 1 , wherein the metal compound (B) including a divalent or higher metal comprises both of a metal compound including a trivalent or higher metal and a metal compound including a divalent metal.

4. The method for producing a glove according to claim 2 , wherein the metal compound including a trivalent or higher metal is an aluminum compound.

5. The method for producing a glove according to claim 2 , wherein the latex composition further contains at least one alcoholic hydroxyl group-containing compound (D) selected from a saccharide (d1), a sugar alcohol (d2), a hydroxy acid (d3), and a hydroxy acid salt (d4).

6. The method for producing a glove according to claim 1 , wherein the metal compound (B) including a divalent or higher metal has a content in the latex composition of 0.1 to 5 parts by weight, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber (A) included in the latex.

7. The method for producing a glove according to claim 1 , wherein the latex composition contains sulfur and/or a sulfur-containing compound (C) as a cross-linking agent in an amount of more than 0 parts by weight and 4 parts by weight or less in terms of the total of the sulfur and the sulfur-containing compound, based on 100 parts by weight of the carboxyl group-containing conjugated diene rubber (A) included in the latex.

8. The method for producing a glove according to claim 1 , wherein the irradiating is performed so that the absorption dose of radiation for irradiation is in a range of 1 to 500 kGy.

9. The method for producing a glove according to claim 1 , wherein the irradiating is performed so that the absorption dose of radiation for irradiation is in a range of 5 to 300 kGy.

10. The method for producing a glove according to claim 1 , wherein the irradiating is performed so that the absorption dose of radiation for irradiation is in a range of 10 to 100 kGy.

11. The method for producing a glove according to claim 1 , wherein the latex composition further contains a sugar alcohol (d2) and a hydroxy acid salt (d4).

Assignees

• Zeon Corp

Inventors

• Yamamoto Misa
• Kitagawa Masaru

Classifications

• C08K3/24 Primary

  Acids; Salts thereof {(C08K3/16 takes precedence)} · CPC title

• C08J2313/02

  Latex · CPC title

• A41D19/0055

  Plastic or rubber gloves · CPC title

• C08J7/123

  Treatment by wave energy or particle radiation (C08J7/18 takes precedence) · CPC title

• C08J5/02 Primary

  Direct processing of dispersions, e.g. latex, to articles · CPC title