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US 2023/0399495 A1Published application
Dip Molding Emulsion and Glove
AssigneeMidori Anzen Co., Ltd.
InventorsNorihide Enomoto, Taichi Ogawa
Life of this patent
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Abstract
Provided is, a glove production method including: (1) the step of immersing a glove forming mold in a liquid coagulant containing calcium ions so as to allow the coagulant to adhere to the glove forming mold; (2) the dispersion step of leaving a dip molding composition to stand with stirring; (3) the dipping step; (4) the gelling step; (5) the leaching step; (6) the beading step; (7) the precuring step; and (8) the curing step, in which method the steps (3) to (8) are performed in the order mentioned, and the dip molding composition has a specific formulation.
Claims6
A dip molding emulsion comprising, at least:
- an elastomer that contains a (meth)acrylonitrile-derived structural unit, an unsaturated carboxylic acid-derived structural unit, and a butadiene-derived structural unit in a polymer main chain;
- a polycarbodiimide crosslinker molecules;
- a pH adjuster for the polycarbodiimide crosslinker molecules comprising an alkali metal hydroxide;
- and
- water, wherein
- the elastomer contains the (meth)acrylonitrile-derived structural unit in an amount of 20% by weight to 40% by weight, the unsaturated carboxylic acid-derived structural unit in an amount of 1% by weight to 10% by weight, and the butadiene-derived structural unit in an amount of 50% by weight to 75% by weight,
- the polycarbodiimide crosslinker molecules comprise at least one polycarbodiimide containing a hydrophilic segment in its molecular structure, and is added in an amount of larger than 0.2% by weight but 4.0% by weight or less with respect to a total solid content of the dip molding emulsion,
- a number-average molecular weight of the polycarbodiimide is from 500 to 5000, and
- the dip molding emulsion has a pH of 9.5 to 10.5.
6 more elements
Dependencies are inferred from the claim text.