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Latex composition for dip molding, and shaped articles prepared therefrom

A technology of dip molding and composition, applied to the latex composition used for dip molding, which can solve the physical properties of gloves (low tensile strength, elongation and modulus, long cross-linking aging of sulfur, glove denaturation, etc. problems, to achieve the effect of improving durability, improving syneresis, and good user experience

Active Publication Date: 2020-10-02
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, the problem is that the smaller the modulus, the higher the wearing experience, but the lower the physical properties (tensile strength, elongation and modulus) of the glove itself
In addition, there is a problem that denaturation or tearing of the glove due to sweat occurs when the glove is worn for a long time
Also, crosslinking using sulfur requires longer aging

Method used

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  • Latex composition for dip molding, and shaped articles prepared therefrom
  • Latex composition for dip molding, and shaped articles prepared therefrom
  • Latex composition for dip molding, and shaped articles prepared therefrom

Examples

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preparation example Construction

[0035] In the present invention, the preparation of the aqueous solution of sodium polysulfide is not particularly limited, and can be prepared by methods known in the art. For example, the aqueous solution is prepared by dissolving sodium sulfide in distilled water to prepare a strongly alkaline aqueous solution, and then adding sulfur (S 8 ) powder [Macromol.Rapid Commun.2015,36,1103-1107] to prepare. At this time, considering the precipitation of sulfur in the aqueous solution, it is preferable that the concentration of the sodium polysulfide solution is 5% by weight to 20% by weight.

[0036] Such sodium polysulfide is used in an amount of 0.1 to 5 parts by weight, preferably 0.5 to 1 part by weight, relative to 100 parts by weight of the carboxylic acid-modified nitrile copolymer latex in terms of solid content. If the content of sodium polysulfide is less than the above range, the above effects cannot be ensured. On the contrary, if it exceeds the above range, syneresi...

Embodiment 1

[0091] Embodiment 1: The latex composition that is used for dip molding and the preparation of dip molding article

[0092] (Preparation of Carboxylic Acid Modified Nitrile Copolymer Latex)

[0093] A 10 L high pressure reactor equipped with a stirrer, thermometer, condenser and nitrogen inlet and configured for continuous addition of monomer, emulsifier and polymerization initiator was replaced with nitrogen. Thereafter, 2.5 parts by weight of alkane was added to the high-pressure reactor with respect to 100 parts by weight of a monomer mixture of 25% by weight of acrylonitrile, 70% by weight of 1,4-butadiene and 5% by weight of methacrylic acid. Sodium phenyl sulfonate, 0.5 parts by weight of tert-dodecyl mercaptan and 140 parts by weight of ion-exchanged water were added, and the temperature was raised to 48°C.

[0094] After raising the temperature, 0.25 parts by weight of potassium persulfate as a polymerization initiator was added. When the conversion reached 95%, the ...

Embodiment 2

[0103] Embodiment 2: The latex composition that is used for dip molding and the preparation of dip molding article

[0104] A latex composition for dip molding was prepared in the same manner as in Example 1 except that hydrophilic sodium polysulfide was used in a proportion of 0.7 parts by weight, and a glove-shaped dip molding article was prepared using it.

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Abstract

The present invention relates to a latex composition for dip molding and a molded article prepared therefrom, more specifically, the composition uses sodium polysulfide having hydrophilicity, thereby being able to prepare slow syneresis, excellent Tensile strength, elongation, and stress properties, as well as excellent perspiration resistance, and a dipped molded product with excellent feel when worn.

Description

technical field [0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2016-0116102 filed on September 9, 2016, the entire contents of which are incorporated herein by reference. [0002] The present invention relates to a latex composition for dip molding, and a shaped article prepared therefrom. The latex composition for dip molding can be used to prepare Dip molded articles with mild syneresis, excellent tensile strength, elongation and modulus properties, and excellent durability to perspiration. Background technique [0003] Disposable rubber gloves used in various daily life, such as housework, food industry, electronics industry, and medical fields, are made by dipping and molding natural rubber or nitrile copolymer latex. In recent years, nitrile gloves have attracted attention in the disposable gloves market due to the problem of natural rubber allergies and its unstable supply and demand. [0004] In the market of nitrile...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/04C08K3/30C08J5/02C08J3/26C08F10/08C08F20/44C08F2/24B29C41/14A41D19/00
CPCB29C41/14C08K3/30A41D19/0062C08F236/06C08F2800/20C08F222/40C08F220/06C08F2/22C08F2/26C08F2/24C08L9/04C08J5/02C08J3/26C08F10/08C08F20/44A41D19/00C08L33/20C08L9/02C08L13/02C08F236/12B29C41/003B29K2033/20B29L2031/4864C08J2309/04C08K2003/3009
Inventor 赵源泰余承旭梁承勋韩政洙金智贤
Owner LG CHEM LTD
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