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coating composition

A composition and coating technology, applied in polycarbonate coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as the inability to obtain coating films, and achieve the effects of excellent acid resistance and excellent initial scratch resistance

Active Publication Date: 2020-10-16
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is impossible to obtain a coating film that completely satisfies these requirements by simply making the coating film soft or hard, and automotive paint manufacturers are struggling to develop a well-balanced automotive clear coating composition that satisfies multiple performances at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] As a hydroxyl-containing acrylic resin, Setalux 1152 (xylene / methoxypropyl acetate mixed solution, solid content 61% by mass, solid content-equivalent hydroxyl value 139 mgKOH / g, hydroxyl-containing acrylic resin) was added as a hydroxyl-containing acrylic resin. Number average molecular weight (3000) 295 g, polycarbonate polyol PC1 20 g, leveling agent BYK-331 (manufactured by BYK Chemical Co., Ltd.) 2.06 g, dibutyltin dilaurate (manufactured by Air Products Industry Co., Ltd.) 1.2 g, and the mixed solvent of xylene / butyl acetate (70 / 30) as diluent, and after stirring, obtain the coating main agent (the polycarbonate polyol in the main agent except solvent) of 50 mass % of solid content ratio is 10%). Duranate TKA-100 (manufactured by Asahi Kasei Co., Ltd.: hexamethylene diisocyanate-based isocyanurate type curing agent, NCO content = 21.8 wt%, isocyanate group in 1 molecule: 3) was added thereto as a curing agent. It mixed so that NCO / OH molar ratio=1.0 / 1.0, and prod...

Embodiment 2

[0137] A coating composition was produced by the method similar to Example 1 except having used polycarbonate polyol PC2 instead of polycarbonate polyol PC1 of Example 1. The coating film performance was evaluated, and the results are shown in Table 1.

Embodiment 3、4

[0139] A coating composition was obtained in the same manner as in Examples 1 and 2 except that the amount of Setalux 1152 added in Example 1 was 230 g and the amount of polycarbonate polyol added was 60 g.

[0140] The coating film performance was evaluated, and the results are shown in Table 1.

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Abstract

The present invention relates to coating compositions. [Problem] To provide a coating composition that has excellent initial scratch resistance (abrasion resistance), wear recovery after abrasion damage, and is excellent in weather resistance and acid resistance. [Solution] A coating composition comprising: (a) a hydroxyl-containing acrylic resin, (b) polycarbonate polyol, and (c) a curing agent, wherein one molecule of the aforementioned (b) polycarbonate polyol The average hydroxyl value of the polyol is 2.2 to 3.5, and the number average molecular weight of the aforementioned (b) polycarbonate polyol is 500 to 5000.

Description

technical field [0001] The present invention relates to coating compositions. Background technique [0002] Conventionally, measures to prevent abrasion caused by car washing machines and scratches around the key hole have been desired, but recently, demands for improvement of these scratches have increased from car users who value appearance. Therefore, it is an important issue for automobile manufacturers to develop a paint that can form a coating film excellent in "car wash abrasion resistance" and "scratch resistance" in order to improve the product competitiveness of automobiles. [0003] However, automotive coatings are not limited to car wash abrasion resistance and scratch resistance around the keyhole, but also have many coating properties such as impact resistance, weather resistance, processability, and adhesion. It is impossible to obtain a coating film that completely satisfies these requirements by simply making the coating film soft or hard, and automotive pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C08G18/40C08G18/62C08G18/44
CPCC08G18/4063C08G18/44C08G18/6229C09D175/04C08G18/6216C08G18/792C09D133/066C09D133/08C09D133/14C08G18/24C09D169/00C09D175/14C08L33/08C08L69/00
Inventor 增渕彻夫川合康文
Owner ASAHI KASEI KK
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