Dual-cured coating composition and method for preparation thereof

A dual curing and composition technology, applied in the direction of coating, etc., can solve the problems of poor flexibility and scratch resistance of the paint film, and achieve the effect of good adhesion, good scratch resistance and smooth paint film

Inactive Publication Date: 2008-10-15
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of poor flexibility and poor scratch resistance of existing polyurethane coatings after curing, and to provide a dual-purpose polyurethane coating with high flexibility and good scratch resistance. Cured coating composition and method for its preparation

Method used

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  • Dual-cured coating composition and method for preparation thereof
  • Dual-cured coating composition and method for preparation thereof

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Effect test

preparation example Construction

[0022] According to the preparation method of the composition provided by the present invention, it can be prepared by directly mixing the components forming the composition of the present invention evenly.

[0023] The use method of the composition provided by the invention is simple. The above mixture is directly dissolved in a solvent to form a uniform solution and then coated on a release film to obtain the desired polyurethane film. Described solvent can be acetone, toluene, ethyl acetate, butyl acetate, isopropanol, n-butanol, cyclohexanone, xylene, methyl isobutyl ketone, ethylene glycol butyl ether, ethylene glycol ethyl ether acetate one or more of them. There is no particular limitation on the amount of the solvent, as long as it can effectively dissolve the components of the above composition, obtain a uniform solution and facilitate coating. For example, the amount of the solvent is generally 60-80 parts by weight relative to 100 parts by weight of the above compo...

Embodiment 1

[0028] This embodiment is used to illustrate the dual-cure coating composition provided by the present invention and its preparation method.

[0029] Get 60.0 grams of hydroxyl polyester resin (DSM company in the Netherlands, Uralac AN822) and 40 milliliters of butyl acetate and stir in the first mixing bucket to obtain a uniformly dispersed mixed solution, then 5.0 grams of ultraviolet photoinitiator Irgacure184, 20.0 Add the solution of 1 gram diluent (domestic HDDA), 0.8 gram leveling agent (Germany Cognis, F41), 1.0 gram wetting and dispersing agent (Dispers 710) and 10 milliliters of butyl acetate in the above-mentioned first stirring barrel, and rotate at 1200 rpm Minute speed stirring for 90 minutes, to obtain the uniformly dispersed first slurry. The slurry does not delaminate or agglomerate within 72 hours at room temperature.

[0030] 20 grams of isocyanate acrylate (Germany BASF company, Laromer LR9000), 0.2 gram of leveling agent (Germany Cognis, F41) and 10 milli...

Embodiment 2

[0033] This embodiment is used to illustrate the dual-cure coating composition provided by the present invention and its preparation method.

[0034] Get 60.0 grams of hydroxyl polyester resin (Netherlands DSM company, Uralac AN822), 5.0 grams of UV photoinitiator Irgacure184, 20.0 grams of diluent (domestic HDDA), 1.0 grams of leveling agent (Germany Cognis, F41), 1.0 grams of wetting and dispersing Agent (Dispers 710), 20 grams of isocyanate acrylate (German BASF company, Laromer LR9000) and 0.2 grams of leveling agent (German Cognis, F41) were mixed evenly to obtain the dual curing coating composition S2 provided by the present invention.

[0035] Mix the above composition with 30 ml of toluene, 10 ml of ethyl acetate, 15 ml of butyl acetate, 10 ml of n-butanol and 5 ml of cyclohexanone to obtain the slurry of dual curing coating composition S2 provided by the present invention. The slurry was fully caked and cured within 12 hours at room temperature.

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Abstract

The invention relates to a dual-curing coating compound, which comprises containing hydroxyl macromolecular compounds provided with a hydroxyl value not lower than 50 milligram KOH per gram, compounds capable of generating cross linking reaction with the containing hydroxyl macromolecular compounds, and thinner, wherein, the compounds capable of generating the cross linking reaction with the containing hydroxyl macromolecular compounds are the compounds the molecules of which simultaneously contain isocyanate radical and polyradical. The dual-curing coating compound provided by the invention can obtain a paint film with good adhesive force, high flexibility and good scratch resistant performance after solidification and meet the requirements of a purse test and a vibration and wear resistant test when applied on the metal surface on one hand, and can effectively solve the problem in the prior art that the compatibility between thermocuring isocyanate and photo-curing polyurethane acrylic ester is poor so as to make the paint film smooth and neat on the other hand.

Description

technical field [0001] The invention relates to a dual curing coating composition and a preparation method thereof. Background technique [0002] With the official implementation of the EU ROHS Directive (Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment) standards, higher requirements have been put forward for the mobile phone manufacturing industry. At this time, the environmentally friendly vacuum coating method developed rapidly, replacing the previous electroplating method and becoming the main method of mobile phone coating technology. Since the coating metal in the vacuum coating method is generally tin or aluminum, the surface is very smooth, and the requirements for coating adhesion are very high. After the current conventional UV-curable coating is directly sprayed on the vacuum-coated metal layer, the adhesion of the coating cannot meet the requirements. For this reason, research on coatings suitable for vacuum coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/04
Inventor 邓国栋刘萌
Owner BYD CO LTD
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