Material for curable aqueous overcoating material and coating material using same

A top coating, water-based technology, applied in the direction of surface coating liquid devices, cyclodextrin coatings, chemical instruments and methods, etc.

Inactive Publication Date: 2008-10-01
NISSAN MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention has been made to solve

Method used

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  • Material for curable aqueous overcoating material and coating material using same
  • Material for curable aqueous overcoating material and coating material using same
  • Material for curable aqueous overcoating material and coating material using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] (1) Preparation of PEG-carboxylic acid by TEMPO oxidation of PEG

[0071] First, dissolve 10 g of polyethylene glycol (PEG) (molecular weight: 1000), 100 mg of TEMPO (2,2,6,6-tetramethyl-1-piperidinyl-oxyl radical) and 1 g of sodium bromide in 100 ml of water , and then 5 ml of a commercially available sodium hypochlorite aqueous solution (available chlorine concentration: 5%) was added thereto, and the resulting solution was stirred at room temperature for 10 minutes. To decompose residual sodium hypochlorite, add up to 5 ml of ethanol to this solution. Thus, the reaction is completed. Using 50 ml of dichloromethane to extract any components except inorganic salts from the solution was repeated three times. The dichloromethane extract was removed by distillation using an evaporator. Then, the distillation residue was dissolved in 250 ml of hot ethanol and placed in a refrigerator (-4°C) overnight to extract only PEG-carboxylic acid. The extracted PEG-carboxylic aci...

Embodiment 2-8

[0083] A curable aqueous clear coating composition was prepared in the same manner as in Example 1 except that the composition description was as shown in Table 1. In addition, a laminated coating film was formed using the prepared clear coating composition.

Embodiment 9

[0085] (1) Preparation of PEG-carboxylic acid by TEMPOP oxidation of PEG

[0086]First, dissolve 10 g of polyethylene glycol (PEG) (molecular weight: 35,000), 100 mg of TEMPO (2,2,6,6-tetramethyl-1-piperidinyl-oxyl radical) and 1 g of sodium bromide in 100 ml of water , and then 5 ml of a commercially available sodium hypochlorite aqueous solution (available chlorine concentration: 5%) was added thereto, and the resulting solution was stirred at room temperature for 10 minutes. To decompose residual sodium hypochlorite, add up to 5 ml of ethanol to this solution. Thus, the reaction is completed. Using 50 ml of dichloromethane to extract any components except inorganic salts from the solution was repeated three times. The dichloromethane extract was removed by distillation using an evaporator. Then, the distillation residue was dissolved in 250 ml of hot ethanol and placed in a refrigerator (-4°C) overnight to extract only PEG-carboxylic acid. The extracted PEG-carboxylic a...

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Abstract

A curable aqueous overcoating material is obtained by blending 1-90% by mass of a hydrophilic polyrotaxane relative to the coating film-forming component. The hydrophilic polyrotaxane has a cyclic molecule, a linear molecule passing through the cyclic molecule and enclosed thereby, and blocking groups arranged on both ends of the linear molecule for preventing elimination of the cyclic molecule, and at least one of the linear molecule and the cyclic molecule has a hydrophilic modification group.

Description

technical field [0001] The present invention relates to motor vehicle parts such as aluminum wheels and door mirrors etc., indoor or outdoor resin molded parts, surfaces of wooden products such as stairs, beds, furniture, etc. Coating compositions, more particularly, relate to hydrophilic polyrotaxanes useful as materials for highly abrasion resistant curable aqueous topcoats. Background technique [0002] Molded parts of polycarbonate resins, acrylic resins, etc. can be coated with curable coatings such as room temperature Drying type coatings and two-component polyurethane coatings are surface treated to improve properties. In addition, in order to improve product design, various parts can be treated with metal mirror finish such as plating, deposition and sputtering. These metal mirror finishes are easily damaged significantly, and thus are usually surface treated with curable paints such as normal temperature drying type paints and two-component polyurethane paints. ...

Claims

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Application Information

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IPC IPC(8): C09D201/02B05D7/14B05D7/24B32B27/00C09D105/16
Inventor 伊藤耕三荒木润铃木达也山中雅彦渡边健太郎
Owner NISSAN MOTOR CO LTD
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