Thermosetting resin composition, coating material for precoated metal, cured product, and laminated body

A resin composition, thermosetting technology, applied in synthetic resin layered products, coatings, devices for coating liquids on the surface, etc., can solve problems such as insufficient performance, and achieve excellent storage stability and short heating time. Effect

Active Publication Date: 2022-05-10
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In Patent Document 4, unlike Patent Document 3, it is not shown that ethylated melamine is preferable to methylated melamine and butylated melamine. The physical properties of the coating film did not see a difference
In addition, Patent Document 4 shows that if an acrylic polyol having a hydroxyl value of 60 mgKOH / g is used, sufficient performance cannot be exhibited.

Method used

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  • Thermosetting resin composition, coating material for precoated metal, cured product, and laminated body
  • Thermosetting resin composition, coating material for precoated metal, cured product, and laminated body
  • Thermosetting resin composition, coating material for precoated metal, cured product, and laminated body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0135] Hereinafter, the present invention will be more specifically described based on examples, but the present invention is not limited by these examples.

[0136] [Material]

[0137] In the following examples and comparative examples, the compositions (coating materials) and raw materials used for the preparation of the coating materials, and the covered bodies (substrates) used for coating the compositions are as follows.

[0138]

[0139] "Polyester Resin with Hydroxyl Group"

[0140] ・(A-1) "Almatex P646" manufactured by Mitsui Chemicals Co., Ltd.

[0141] Solvent: mixed solvent of SOLVESSO #100 (manufactured by ExxonMobil Chemical Co., SP value=18.0) / methyl isobutyl ketone (SP value=17.2)=9 / 1

[0142] Solid content: 60%

[0143] Weight average molecular weight: 51,000

[0144] Hydroxyl value: 52mgKOH / g

[0145] ・(A-2) "Almatex P646SB" manufactured by Mitsui Chemicals Co., Ltd.

[0146] Solvent: sec-butanol (SP value = 22.1)

[0147] Solid content: 60%

[0148]...

Embodiment A1～29

[0253] [Examples A1-29, Comparative Examples A1-20]

[0254] By mixing resin (A) or (a) having a hydroxyl group, melamine resin (B), Lewis acid catalyst (C) or other catalyst (c') and solvent (D) in the ratio shown in Tables 2-4, Thus, a composition (coating material) was prepared and evaluated.

[0255] After the obtained composition was coated on a steel plate (150 mm x 70 mm x thickness 0.8 mm) using a bar coater so that the cured film thickness became 15 μm, the composition was cured by heating at 80° C. for 30 minutes, Thus, a test panel with a coated film was prepared and evaluated.

[0256] The evaluation results are shown in Tables 2-4.

[0257] [Table 2]

[0258]

[0259] [table 3]

[0260]

[0261] [Table 4-1]

[0262] Table 4-1

[0263]

[0264] 1) SOLVESSO 100 / methyl isobutyl ketone = 9 / 1 (weight) 5) Mixed solvent of n-butyl acetate and methyl isobutyl ketone

[0265] 2) sec-butanol 6) isobutanol

[0266] 3) mixed solvent of toluene and n-butyl ace...

Embodiment A30～45 and comparative example A21～39

[0276] The composition is prepared by mixing titanium oxide dispersed polyol solution A1, melamine resin (B), Lewis acid catalyst (C) or other catalyst (c'), and solvent (D) at the ratios shown in Tables 5 to 7 (white coating material) and evaluated.

[0277] After the obtained composition was coated on a steel plate (150 mm x 70 mm x thickness 0.8 mm) using a bar coater so that the cured film thickness became 15 μm, the composition was cured by heating at 80° C. for 30 minutes, Thus, a test panel with a coated film was prepared and evaluated.

[0278] The evaluation results are shown in Tables 5-7.

[0279] [table 5]

[0280]

[0281] [Table 6-1]

[0282]

[0283] [Table 6-2]

[0284] Table 6-2

[0285]

[0286] 1) SOLVESSO 100 / methyl isobutyl ketone=9 / 1 (weight)

[0287] 2) Isobutanol

[0288] [Table 7]

[0289] Table 7

[0290]

[0291] 1) SOLVESSO 100 / methyl isobutyl ketone=9 / 1 (weight)

[0292] 2) Isobutanol

[0293] 3) mixed xylene / n-butanol=4 / 6 (w...

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Abstract

An object of the present invention is to provide a thermosetting resin composition capable of obtaining a cured film excellent in durability and appearance at low temperature and having excellent storage stability. The thermosetting resin composition of the present invention comprises: (A) a resin having a specific hydroxyl group, (B) an alkyl etherified melamine resin, (C) a Lewis acid catalyst comprising a metal having a Pauling electronegativity of 1.31 to 2.02. A cation and a counter anion which is a deprotonated form of a protonic acid whose acid dissociation constant pKa is 1.0 or less, and (D) a solvent, the solvent (D) includes a solvent (D) having a Hildebrand solubility parameter value (SP value) of 18.6 to 47.9 -1), the content of the solvent (D-1) is 21% by mass or more relative to the total amount of the solvent (D), and the solvent (D-1) has a solubility of the Lewis acid catalyst (C) of 0.01% by mass or more The content of (D-S) is 4% by mass or more relative to the total amount of the solvent (D).

Description

technical field [0001] The present invention relates to a thermosetting resin composition, a cured product containing the composition, and a laminate containing a cured film containing the composition. [0002] Furthermore, the present invention relates to a coating material for precoated metal, a cured product including the coating material, and a laminate including a cured film including the coating material. Background technique [0003] Conventionally, thermosetting resin compositions containing polyols and alkyl-etherified melamines have been used in various fields such as automotive coatings and home appliance coatings, and the compositions are required to have good storage stability and the durability and durability of the resulting cured film. Excellent appearance. In addition, the curing of the above-mentioned thermosetting resin composition requires a heating time at a temperature of approximately 110 to 160° C. for 10 to 60 minutes. However, from the viewpoint of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L101/06B05D7/24B32B27/26C08L33/14C08L61/30C08L67/00C08L75/04
CPCB05D7/24B32B27/26C08L33/14C08L61/30C08L67/00C08L75/04C08L101/06
Inventor 市原有人浅野阳介小菅宏
Owner MITSUI CHEM INC
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