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Polyester resin for metal coating and method for producing the same

A polyester resin, metal plate technology, applied in polyester coatings, metal layered products, chemical instruments and methods, etc., can solve the problem of not improving the yield of products, and achieve excellent corrosion resistance and dissolution resistance, excellent The effect of impact resistance

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

AI Technical Summary

Problems solved by technology

However, new technical problems arise by blending ionomer resins with polyester resins: According to conditions, the yield of products cannot be improved due to the generation of lumps due to the aggregation of ionomer resins

Method used

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  • Polyester resin for metal coating and method for producing the same
  • Polyester resin for metal coating and method for producing the same
  • Polyester resin for metal coating and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0053] (Preparation of polyester resin)

[0054] In the present invention, the polyester resin is composed of an acid component mainly composed of terephthalic acid and containing 1 to 15 mol% of isophthalic acid and 2 to 10 mol% of dimer acid, and an alcohol component mainly of ethylene glycol. Except for specific dimer acids, these can be produced by conventionally known methods.

[0055] For example, polyester resins containing terephthalic acid and dimer acid (hereinafter sometimes referred to as "PET / DA") and polyester resins containing terephthalic acid and isophthalic acid (hereinafter sometimes referred to as "PET / DA") can be used. / IA") are prepared separately, and then they are blended, or can be prepared by containing all of isophthalic acid, dimer acid, and terephthalic acid as copolymerization components, and performing copolymerization, etc. In the present invention, it is particularly preferable to combine the polyester (hereinafter sometimes referred to as "PE...

Embodiment 1

[0126] Using two extruders and a double-layer T-die, supply a blend of resin B and resin M in Table 1 at a ratio of B: M = 66.7%: 33.3% to the extruder on the lower layer side, and melt After kneading, the resin L shown in Table 1 was supplied to the extruder on the surface layer side, melted and kneaded, and extruded from a T-die so that the lower layer had a thickness of 24 μm and the surface layer had a thickness of 4 μm. This was cooled with a cooling roll to form a film, which was taken up and used as a cast film.

[0127] Next, heat-laminate the cast film to a TFS steel plate (thickness: 0.18 mm, amount of metal chromium: 120 mg / m 2 , chromium oxide hydrate amount: 15mg / m 2 ) on one side of the TF S steel plate, a cast film made of a polyester resin containing 20% ​​by weight of titanium dioxide as a pigment is thermally laminated simultaneously on the other side of the TF S steel plate, and immediately water-cooled to obtain a resin-coated metal plate. At this time, ...

Embodiment 2

[0135] Except that the cast film obtained by blending resin D and resin M in Table 1 at a ratio of D:M=71.0%:29.0% was used on the inner side and supplied to the extruder on the lower layer side, the same method as in Example 1 was used. A resin-coated metal plate and a seamless tank were similarly obtained.

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Abstract

Disclosed is a polyester resin for metal plate coating, which is composed of an acid component mainly composed of terephthalic acid while containing 1-15% by mole of isophthalic acid and 2-10% by moleof a dimer acid, and an alcohol component mainly composed of ethylene glycol. In this polyester resin, the dimer acid contains not less than 20% by mole of aliphatic dimer acid(s) and the molar ratiobetween the aliphatic dimer acid(s) and alicyclic dimer acid(s) is within the range of from 1:1 to 1:5. Consequently, the polyester resin for metal plate coating is excellent not only in film-formingperformance and coating adhesion, but also in dissolution resistance.

Description

technical field [0001] The present invention relates to a polyester resin for metal plate coating and a preparation method thereof, and more particularly to a manufacturable resin-coated metal plate, metal can, and lid having very excellent impact resistance, processing adhesion and dissolution resistance Polyester resins for metal sheet cladding and methods for their preparation. Background technique [0002] At present, as a means of imparting corrosion resistance to metal materials, it is common to coat the metal surface with a resin layer. As a coating method used in this technology, it is known to use thermosetting resins such as epoxy resins and phenolic resins dispersed in solvents. The method of resin coating the metal surface is the method of laminating pre-formed films such as polyester, olefin, polyamide films and metal substrates through isocyanate, epoxy, phenolic and other primers. However, in these methods, the thermosetting resin or primer used contains bisp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183B32B15/09B65D8/16B65D65/40C08L67/02
CPCC08G63/18C09D167/06C09D167/02C08G63/183C08G63/54Y10T428/31681C08L67/03C09D167/03B32B15/09
Inventor 船城裕二大桥和彰佐藤一弘
Owner TOYO SEIKAN KAISHA LTD
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