Dipping latex composition and rubber articles made therefrom by dipping
AssigneeNippon Zeon Co., Ltd.
InventorsYutaka Ozawa, Hisanori Ohta
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Abstract
A vulcanizable dip-forming rubber latex composition comprising an unsaturated nitrile-conjugated diene copolymer rubber latex, a sulfur-containing vulcanizer, and a vulcanization accelerator comprising at least one compound selected from (i) dithiocarbamic acid compounds of the formula: and (ii) zinc dithiocarbamate compounds of the formula: wherein R1 and R2 are hydrocarbon groups having at least 6 carbon atoms which may be the same or different, and an optional thiazole compound. A rubber article dip-formed from the rubber latex composition has no crack occurrence, good surface luster and good vulcanization properties, and does not contain a nitrosamine, and therefore, is suitable for medical use.
Claims14
A vulcanizable dip-forming rubber latex composition characterized as comprising an unsaturated nitrile-conjugated diene copolymer rubber latex, a sulfur-containing vulcanizer, at least one vulcanization accelerator selected from (i) dithiocarbamic acid compounds represented by the formula (1):
- wherein R1 and R2 are hydrocarbon groups having at least 6 carbon atoms which may be the same as or different from each other, and (ii) zinc dithiocarbamate compounds represented by the formula (2)
- wherein R1 and R2 are hydrocarbon groups having at least 6 carbon atoms which may be the same as or different from each other, wherein a rubber article dip-formed from said rubber latex composition has an extracted nitrosamine content of not larger than 1 ppm.
Dependencies are inferred from the claim text.