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Coating composition for can to be processed, method for producing can to be processed, and can to be processed

A composition and coating technology, applied in the field of cans with processing, can solve the problems of low durability, high opening torque, easy damage, etc., and achieve the effect of high scratch resistance, low opening torque, and not easy to damage

Inactive Publication Date: 2018-08-07
UNIVERSAL CAN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The soft coating has low durability against high-temperature treatment (retort treatment) after filling beverages and other contents, and is easily damaged during transportation
In addition, the soft coating film also has the problem that when the cap of the bottle is opened, the torque of opening the cap becomes high.

Method used

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  • Coating composition for can to be processed, method for producing can to be processed, and can to be processed

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Experimental program
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Effect test

preparation example Construction

[0099] [Preparation of coating composition]

[0100] As the resin component of the coating composition, polyester resins, amino resins, and epoxy resins having a Tg of 20 to 70°C (20°C, 30°C, 35°C, 40°C, 60°C, or 70°C) are used. In addition, Tg of the polyester resin was measured by the TMA method using a thermomechanical analyzer (TMA4010SE) manufactured by NETZSCH Corporation.

[0101] As the polyester resin, a combination of terephthalic acid and 2,6-naphthalene dicarboxylic acid, which are polyvalent carboxylic acids, and ethylene glycol and propylene glycol, which are polyhydric alcohols, is used. In addition, Melan series (manufactured by Hitachi Chemical Co., Ltd.) was used for the amino resin, and jER (registered trademark) Grade 1001 (manufactured by Mitsubishi Chemical Corporation) was used for the epoxy resin.

[0102] Each polyester resin having a Tg of 20 to 70° C. was mixed with an amino resin and an epoxy resin, respectively, and dissolved in a solvent to prepa...

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Abstract

The invention provides a coating composition for a can to be processed, which can form a coating film with high scratch resistance; a method for producing a can to be processed, using the coating composition; and a can to be processed. A coating composition for a can to be processed has a polyester resin with a glass transition temperature of 35-60 DEG C, amino resin, and epoxy resin.

Description

technical field [0001] The present invention relates to a coating composition for processed cans, a method for producing a processed can, and a processed can. Background technique [0002] In recent years, there has been an increasing demand for screw cans such as bottles and cans for sale of beverages and the like. In the screw can, since the cap is detachably attached, once the cap is opened, the contents in the bottle can be kept in an airtight state by closing the cap. Therefore, bottles and cans are mainly used for beverages and the like for vending machines. [0003] In the manufacturing process of bottles and cans, after a cylindrical can body is formed from a sheet metal material, outer surface coating and inner surface coating of the can body are performed. In exterior coating, base coating with sizing paint (サイズ paint) is usually performed, and after the base coating is baked and dried, printing, exterior finish coating, and edge coating are performed. After the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D161/20C09D163/00C09D7/20C09D7/65B05D7/24B05D3/00B65D1/02B32B1/00
CPCC09D167/00B65D1/0223B05D3/007B05D7/24B05D2508/00B05D2504/00C08L2205/035C08L61/20C08L63/00C08L23/06C08L91/06C08L83/04C09D163/00B65D17/00B65D25/34B05D3/0254
Inventor 渡边幸人
Owner UNIVERSAL CAN CORP
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