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Organic solvent base coating composition

A pigment composition and a technology for the composition, which are applied in the field of repair coating, can solve the problems of poor appearance and poor durability of the undercoating film, and achieve the effects of excellent adhesion and sufficient durability.

Inactive Publication Date: 2020-11-06
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the undercoating materials described in Patent Documents 1 and 2 are used in such a repair coating process, there are cases where poor appearance is caused due to poor durability of the undercoating film.

Method used

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  • Organic solvent base coating composition
  • Organic solvent base coating composition
  • Organic solvent base coating composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0110] Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to these examples. In addition, "part" and "%" in the following example represent "part by mass" and "% by mass", respectively.

[0111]

manufacture example 1

[0113] Add 52 parts of butyl acetate to the reaction vessel, raise the temperature to 110°C while stirring, and add 15 parts of styrene and 10 parts of methyl methacrylate dropwise at a constant speed for 3 hours at a temperature below 110°C using a dropping pump. , 10 parts of n-butyl methacrylate, 20 parts of tert-butyl methacrylate, 19 parts of 2-ethylhexyl methacrylate, 15 parts of 2-hydroxyethyl methacrylate, Placcel FA-2D (trade name, Daicel Chemical Co., Ltd., a monomer mixture containing 10 parts of a reaction product of caprolactone and hydroxyethyl acrylate), 1 part of acrylic acid, and 2.0 parts of azobisisobutyronitrile, and a polymerization initiator. After completion of the dropwise addition, the temperature was kept at 110° C. for 60 minutes, and stirring was continued. Thereafter, a solution obtained by dissolving 0.5 parts of azobisisobutyronitrile as an additional catalyst in 7 parts of butyl acetate was added dropwise at a constant rate over 60 minutes. The...

manufacture example 2

[0115] In the said manufacture example 1, except having made the monomer composition into the following, it carried out similarly, and obtained the lactone-modified acrylic resin solution (A-2). The weight average molecular weight of the resin is 14000, the hydroxyl value of the solid is 80mgKOH / g, the acid value of the solid is 8mgKOH / g, and the glass transition temperature is 35°C.

[0116]

[0117]

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Abstract

The invention provides a primer coating compound and a repair coating method using same; the primer coating compound can obtain a natural and smooth appearance even under the wet-on-wet coating and / or film thickness conditions, is suitable to form the coating with excellent duration; the primer coating compound is formed by mixing more than two ingredients before coating, and modulated by multi-ingredient system; the primer coating compound comprises lactone-modified acrylic polyol (A), lactone-unmodified acrylic polyol (B) and a pigment composition (C); the lactone-unmodified acrylic polyol (B) contains acid group and is high in acid value when compared with A; the coating compound is prepared by reacting the main component (I) in the range of 50 to 500 parts by mass based on 100 parts by mass of the total (100) parts of the solid (A) and (B) in the range of (C) and the polyisocyanate compound The curing agent component (II) is combined, wherein either I or II or both contain alkoxysilane compound (D).

Description

technical field [0001] In particular, the present invention relates to an organic solvent-based undercoating composition usable for refinishing of automobiles and the like, and a refinishing method using the same. Background technique [0002] In general, the repair of automobile exterior panels, etc. is broadly divided into partial repair painting in the case of minor damage, and replacement of new parts in the case of major damage. [0003] In the case of partial repair painting, many steps are involved, such as peeling off and / or sanding the old paint film on the damaged part, and then applying putty (sheet metal パテ) to a thickness of Apply it thickly to the part, dry and grind the putty surface, then apply the resin putty on it with a spatula or the like until it covers the old coating film around the part, after drying, grind the putty surface, and then Primer surfacer application, top coat application, etc. are sequentially performed thereon. [0004] In addition, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04
CPCC09D175/04
Inventor 藤田裕介
Owner KANSAI PAINT CO LTD