Solvent type double-component, high-smoothness vanish composition as well as preparation method and application

A two-component, solvent-based technology, used in devices, coatings, polyurea/polyurethane coatings, etc. to apply liquid to the surface, which can solve the problem of poor impact resistance and cupping performance of the paint film, Scratches, affecting the gloss and smoothness of the varnish film surface

Active Publication Date: 2018-06-22
NIPPON PAINT GUANGZHOU +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the scrubbing process, hard brushes and cleaning agents of different materials will act on the surface of the varnish film, which will more or less affect the appearance of the varnish film. Scratches on the surface of the varnish coating film, thus affecting the surface gloss and flatness of the varnish coating film
In order to improve the friction resistance of the varnish coating film, the amount of curing agent used in the varnish composition is usually adjusted to increase the crosslinking density and hardness of the coating film, thereby improving the friction resistance of the coating film; The

Method used

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  • Solvent type double-component, high-smoothness vanish composition as well as preparation method and application
  • Solvent type double-component, high-smoothness vanish composition as well as preparation method and application
  • Solvent type double-component, high-smoothness vanish composition as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0211] Hydroxy(meth)acrylic resin

[0212] First, the mixed solvent of 3000g xylene and propylene glycol methyl ether acetate (mass ratio is 1:1) is joined in the 10L reactor that agitator, thermometer, nitrogen conduit and reflux condenser are equipped with, and reaction system is heated up to 130-140°C. After the reaction temperature is stabilized, the reaction composed of 500g styrene, 2250g n-butyl acrylate, 1750g hydroxyethyl methacrylate, 50g acrylic acid, 450g methyl methacrylate and 310g tert-butyl peroxide 2-ethylhexanoate The mixture is added dropwise into the reaction kettle through a peristaltic pump. During the dropwise addition, the reaction temperature is maintained between 130-140° C., and the dropping rate is controlled to ensure that the dropwise addition of the reaction mixture is completed within 2-4 hours. After the dropwise addition, continue to keep warm at 130-140°C for 2-4h, and terminate the reaction to obtain a solid content of 62.5%, a hydroxyl val...

Embodiment 2

[0214] Hydroxy(meth)acrylic resin

[0215]First, a mixed solvent of 3000g xylene and propylene glycol methyl ether acetate (mass ratio of 1:1) is added to a 10L reactor equipped with a stirrer, a thermometer, a nitrogen conduit and a reflux condenser, and the reaction system is heated to 130-140°C. After the reaction temperature is stabilized, the reaction composed of 500g styrene, 1750g n-butyl acrylate, 1750g hydroxyethyl methacrylate, 50g acrylic acid, 950g methyl methacrylate and 432g tert-butyl peroxide 2-ethylhexanoate The mixture is added dropwise into the reaction kettle through a peristaltic pump. During the dropwise addition, the reaction temperature is maintained between 130-140° C., and the dropping rate is controlled to ensure that the dropwise addition of the reaction mixture is completed within 2-4 hours. After the dropwise addition, continue to keep warm at 130-140°C for 2-4h, and terminate the reaction to obtain a solid content of 62.5%, a hydroxyl value of 1...

Embodiment 3

[0217] Hydroxy Polyester Resin

[0218] In a 5L reactor, add 708g 1,6-hexanediol (M=118), 312g neopentyl glycol (M=104), 804g trimethylolpropane (M=134), 216g 1,4 - Cyclohexanedimethanol (M=144), 1752 g adipic acid (M=146), 516 g 1,6-cyclohexanedioic acid (M=172) and 2.5 g dibutyltin oxide. Turn on the stirring and slowly raise the temperature of the reactor to 120°C, and keep it at this temperature for 15-30min. After all the materials are dissolved, raise the temperature of the reactor to 150°C and keep it at this temperature for 2-2.5 hours, then raise the temperature of the reactor to 180°C and continue to keep it at this temperature for 2-2.5 hours, and finally raise the temperature of the reactor to 220°C. The reaction kettle was kept warm at 220°C. When the temperature of the fractionating column dropped to 80°C, xylene was added to reflux with water, and samples were taken every 3 hours to measure the acid value. When the acid value is less than 3, stop heating and ...

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Abstract

The invention discloses a solvent type double-component and high-smoothness vanish composition which comprises a component A and a component B, wherein the component A comprises hydroxy-acrylic resinor hydroxy-methyl acrylic resin, and hydroxyl polyester resin, amino resin, a rhelogy controller, polycaprolactone modified polysiloxane, aids and a first solvent; the component B comprises multifunctional aliphatic isocyanate, and/or polyfunctionality cycloaliphatic isocyanate and/or polyfunctionality cycloaliphatic isocyanate and/or cycloaliphatic isocyanate of which a part of isocyanate groupsare sealed and free isocyanate groups are still available; a sealing agent for sealing the isocyanate groups joins in a curing reaction in the baking process, or isocyanate groups which are released continuously and a second solvent are removed by the sealing agent for sealing the isocyanate groups in the baking process. By adopting the solvent type double-component and high-smoothness vanish composition disclosed by the invention, the smoothness of the surface of a vanish composition coated surface can be effectively improved, therefore, the friction resistance of the coated surface can be improved.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and relates to a varnish composition, a preparation method and its application, in particular to a solvent-based two-component, high-slip varnish composition and a preparation method thereof, and the solvent-based two-component 1. The varnish composition with high slipperiness is coated on the substrate according to different construction techniques to form a cured coating or an application method for preparing a multi-coat finishing system. Background technique [0002] At present, as the most common means of transportation in people's daily life, cars have gradually penetrated into thousands of households. With the continuous increase of people's demand for automobiles, the subsequent requirements for the appearance and performance of automobiles are also constantly improving. The car body can be given an excellent appearance by spraying the car paint, and can also improve the perfor...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D7/65C08G18/42C08G18/62B05D7/00
CPCB05D7/00C08G18/4063C08G18/4241C08G18/6229C09D175/06C08L83/10
Inventor 张萌夏天渊郭峻峰赵励倪健
Owner NIPPON PAINT GUANGZHOU
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