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Epdm sealing compound and cap with the same applied thereto

A sealant and shape technology, applied in sealing devices, engine sealing, coating, etc., can solve problems such as failure to show sealing and durability, dioxin production, rust, etc., and achieve excellent hemming processing. Excellent properties, excellent aging resistance, and excellent dissolution resistance

Inactive Publication Date: 2010-02-10
TOYO SEIKAN KAISHA LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, chloroprene rubber contains chlorine, so there are problems such as rusting and generation of dioxins when incinerated
In addition, acrylonitrile butadiene rubber (hereinafter referred to as "NBR") is usually used in combination with a softener because the film formed by it is hard. In this case, when a good solvent such as toluene is used as the content, although it has Excellent airtightness and durability, but cannot show sufficient airtightness and durability when the contents are poor solvents such as alcohols and engine oils

Method used

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  • Epdm sealing compound and cap with the same applied thereto
  • Epdm sealing compound and cap with the same applied thereto
  • Epdm sealing compound and cap with the same applied thereto

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] (Preparation of sealant)

[0067] The sealant of the present invention is prepared as follows: using a latex of a rubber component mainly composed of EPDM, diluting or concentrating the latex to prepare the above-mentioned predetermined average particle diameter, viscosity, and solid content concentration, and passing the latex in the latex Add fillers, vulcanizing agents and vulcanization accelerators, as well as additives such as thickeners, dispersion stabilizers, anti-aging agents, pigments, etc., as needed, and stir and mix to prepare an aqueous dispersion sealant.

[0068] The sealant can be directly applied to a container lid material or the like in the form of such an aqueous dispersion, and can be heated at a temperature of 50 to 150°C for 3 to 60 minutes to form a sealing material.

[0069] (cover)

[0070] The sealant of the present invention can be preferably used for metal container lids, caps, sealing cups used in aerosol containers, or container bodies such as th...

Embodiment 1

[0078] (Preparation of sealant)

[0079] In an appropriate amount of ion-exchanged water, weigh and add 0.5 parts of dispersion stabilizer (sodium salt of naphthalenesulfonic acid·formalin condensate), 0.5 parts of anti-aging agent (2,2-methylene-bis-[6- (1-methylcyclohexyl-p-cresol)]), 12 parts of titanium oxide and 20 parts of aluminum hydroxide as fillers, 20 parts of zinc oxide, 0.5 parts of sulfur and 0.1 parts of vulcanizing agent and vulcanization accelerator Zinc butyl dithiocarbamate was dispersed using a ball mill to obtain an aqueous dispersion of inorganic filler. In this filler dispersion, ion-exchanged water, 1.5 parts of sodium dodecylbenzene sulfonate as a dispersion stabilizer, and 100 parts of EPDM latex as an elastomer in terms of solid content were added as a 3 parts of methyl cellulose of the thickener are mixed and stirred to adjust a sealant with a solid content of 35%.

[0080] (Production of can lid and can body)

[0081] On the inner and outer surfaces of...

Embodiment 2～9

[0084] (Examples 2-9, Comparative Examples 1-8)

[0085] According to the formulas shown in Tables 1 and 2, the same mixing as in Example 1 was used to prepare.

[0086] Regarding the sealants prepared in the Examples and Comparative Examples, the swelling test, the aging resistance test, the liner coating suitability, the curling suitability, and the sealing performance evaluation were determined according to the following methods.

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Abstract

A sealing compound characterized by consisting of an aqueous dispersion containing a rubber component composed mainly of an ethylene propylene nonconjugated diene copolymer rubber, a vulcanizing agent, a vulcanization accelerator and a filler. Accordingly, excellent resistance is realized to contents which a sealant composition for metal container consisting of an aqueous dispersion of NBR and SBRhas been unable to cope with, and even in the application to such contents, excellent sealing performance and durability can be exhibited. Therefore, the sealing compound can be suitably applied especially to a turn fastening sealing usage in which for sealing of contents by turn fastening of a container to a cap, the compound is applied to the cap side so as to interpose the same between the capand the container.

Description

Technical field [0001] The present invention relates to a sealant mainly composed of ethylene propylene non-conjugated diene copolymer rubber. More specifically, it relates to an ethylene propylene resin having excellent content resistance, coating properties, curling properties, and sealing properties. A water-based sealant containing a non-conjugated diene copolymer rubber as a main component and a cap formed by applying the sealant. Background technique [0002] Conventionally, in order to seal the contents of the container and the lid by crimping, a sealant for crimp sealing, which is applied on the side of the lid and between the lid and the container, is used, especially for storing engine oil, industrial lubricating oil, or chemicals. As the sealant that can be used in the container of the contents, a sealant mainly composed of chloroprene rubber and acrylonitrile butadiene rubber having oil resistance is used. [0003] However, chloroprene rubber contains chlorine, so ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10F16J15/10
CPCC09K2200/0642C08L23/16C08K5/0025C09K3/10C08L2205/03C09D123/16C08L2205/02F16J15/10
Inventor 弘津宗光岛田宜治
Owner TOYO SEIKAN KAISHA LTD
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