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Mono-component varnish composition, preparation method and purpose thereof

A one-component, one-component technology that can be used in coatings, pre-treating surfaces, and devices for coating liquids on surfaces, and can solve problems such as negative effects on paint films, poor weatherability and stability

Active Publication Date: 2017-07-04
LANGFANG NIPPON PAINT +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of silanes to improve rub resistance has associated negative effects on the paint film
The Si-O-R group can also be hydrolyzed to react with the hydroxyl groups in the resin, which is beneficial to increase the crosslink density and improve the friction resistance, but the newly formed Si-O-C group is easy to hydrolyze, so it has relatively poor performance under hot and humid conditions. Weather stability

Method used

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  • Mono-component varnish composition, preparation method and purpose thereof
  • Mono-component varnish composition, preparation method and purpose thereof
  • Mono-component varnish composition, preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] Preparation of polymers with hyperbranched or dendritic structures

[0159] Add 354.8g of Boltorn H40 and 74g of hexahydrophthalic anhydride into a 1L reaction kettle equipped with a stirrer, a thermometer, a nitrogen conduit and a reflux condenser, and then raise the temperature of the reaction system to 130°C. After the reaction temperature is constant, continue to insulate at this temperature for 4 to 5 hours, during which the acid value is measured by sampling every 1 hour. When the acid value (63mgKOH / g) reaches the theoretical value (62.8mgKOH / g), add 115.2g ring Glycidyl tert-carbonate with an oxygen equivalent of 240 and 0.5 g of N,N-dimethylbenzylamine, and keep warm at this temperature for 4 to 5 hours. During the heat preservation process, continuously monitor the change of the acid value, and stop the reaction when the acid value is less than 2mgKOH / g. When the reaction temperature dropped to 110° C., butyl acetate was added to reduce the viscosity and adju...

Embodiment 2

[0161] Preparation of polymers with hyperbranched or dendritic structures

[0162] Add 354.8g of Boltorn H40 and 98.6g of hexahydrophthalic anhydride into a 1L reaction kettle equipped with a stirrer, a thermometer, a nitrogen conduit and a reflux condenser, and then raise the temperature of the reaction system to 130°C. After the reaction temperature is constant, continue to keep warm at this temperature for 4 to 5 hours, during which the acid value is measured by sampling every 1 hour. When the acid value measured value (79mgKOH / g) reaches the theoretical value (79.2mgKOH / g), add 153.6g ring Glycidyl tert-carbonate with an oxygen equivalent of 240 and 0.5 g of N,N-dimethylbenzylamine, and keep warm at this temperature for 4 to 5 hours. During the heat preservation process, continuously monitor the change of the acid value, and stop the reaction when the acid value is less than 2mgKOH / g. When the reaction temperature dropped to 110° C., butyl acetate was added to reduce the ...

Embodiment 3

[0164] Preparation of Epoxy Modified Hyperbranched Polyester Resin

[0165] Prepare with reference to the synthesis method described in Example 1 of patent CN104628995, the specific synthesis steps are as follows: add 354.8g Boltorn H40 and 74g hexahydrophthalic anhydride to a 1L reactor equipped with a stirrer, a thermometer, a nitrogen conduit and a reflux condenser, Then the temperature of the reaction system was raised to 130°C. After the reaction temperature is constant, continue to keep warm at this temperature for 4 to 5 hours, during which the acid value is measured by sampling every 1 hour. When the acid value measured value (63mgKOH / g) reaches the theoretical value (62.8mgKOH / g), add 134.4g ring 1,4-butanediol diglycidyl ether with an oxygen equivalent of 140 and 0.6 g of triphenylphosphine, and continue to keep warm at this temperature for 4 to 5 hours. During the heat preservation process, continuously monitor the change of acid value and epoxy equivalent, and sto...

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Abstract

The invention discloses a mono-component varnish composition, which comprises at least a polymer having a hyper branched or dendritical structure; at least one type of hydroxyl acrylic resin or hydroxyl methacrylate resin; at least one type of organosilicon-modified acrylic resins; at least a crosslinking curing agent; at least an acid catalyst; at least a rheological control agent; at least an auxiliary agent and at least a solvent; and the mono-component varnish composition has the advantages of high scratch resistance and high weather resistance. The provided mono-component varnish composition can effectively increase the smoothness of the surface of a varnish composition film, and increases the rub resistance of the film; in addition, the introduction of the organosilicon-modified acrylic resin can further increase the weatherability of the varnish composition film.

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 one-component varnish composition with high scratch resistance and high weather resistance and a preparation method thereof, and the high scratch resistance and high weather resistance The high weather resistance one-component varnish composition is coated on a 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, automobiles 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 excell...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D133/14C09D175/06B05D3/02B05D7/00C08F220/18C08F220/28C08F220/06C08F212/08C08F230/08
CPCB05D3/0254B05D7/58B05D7/582C08F220/18C08F220/1804C09D133/08C09D133/14C09D143/04C08L75/06C08L43/04C08L33/08C08L33/14C08F220/281C08F220/06C08F212/08C08F220/14C08F230/08
Inventor 张萌夏天渊果建军梅鹏张景斌
Owner LANGFANG NIPPON PAINT
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