One-component, high solid content, low volatile organic compound, environment-friendly varnish composition, preparation method and use thereof

An organic compound, environment-friendly technology, applied in the direction of coating, etc., can solve the problem of high VOC emissions

Active Publication Date: 2019-06-28
LANGFANG NIPPON PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] At present, my country's industrial coatings are usually traditional solvent-based coatings with high VOC emissions;

Method used

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  • One-component, high solid content, low volatile organic compound, environment-friendly varnish composition, preparation method and use thereof
  • One-component, high solid content, low volatile organic compound, environment-friendly varnish composition, preparation method and use thereof
  • One-component, high solid content, low volatile organic compound, environment-friendly varnish composition, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] Example 1 Preparation of polymers with hyperbranched or dendritic structures (molar ratio H40: HHPA: E-10P=1:9.6:9.6)

[0120]Add 354.8g of H40 and 74g of HHPA 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 E-10P 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 adj...

Embodiment 2

[0121] Example 2 Preparation of polymers with hyperbranched or dendritic structures (molar ratio H40: HHPA: E-10P=1:12.8:12.8)

[0122] Add 354.8g of H40 and 98.6g of HHPA into a 1L reaction kettle equipped with a stirrer, thermometer, nitrogen conduit and 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 E-10P 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 vi...

Embodiment 3

[0123] Example 3 Preparation of polymers with hyperbranched or dendritic structures (molar ratio H40: HHPA: E-10P=1:19.2:19.2)

[0124] The quality of HHPA and E-10P in Example 1 is increased to 148g and 230.4g by 74g and 115.2g respectively, other preparation steps and conditions are as described in Example 1, obtain different from Example 1 with hyperbranched or Polymers with dendritic structure.

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Abstract

The invention discloses a single-component, high solid content, low VOC, environment-friendly varnish composition, comprising at least one polymer with hyperbranched or dendritic structure; at least one hydroxyl acrylic resin or hydroxyl methacrylic resin; at least one cross-linking curing agent; at least one acid catalyst; at least one rheology control agent; The varnish composition provided by the invention and its application can not only effectively reduce the viscosity of the varnish coating system, help to increase the construction solid content to more than 58%, reduce the construction VOC emission to less than or equal to 420g / L; and can effectively reduce the curing The shrinkage of the paint film caused by the process makes the cured multi-coat paint film have a better appearance, especially in the wet-on-wet process of the primer, base paint and varnish, and the three coats are cured together. In baking or IPP system, the effect is obvious.

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 single-component solvent-based solvent-based varnish whose content of volatile organic compounds (volatile organic compounds, VOC) is less than or equal to 420g / L in the construction state One-component, high solid content, low VOC, environment-friendly varnish composition and preparation method thereof, and the one-component, high solid content, low VOC, environment-friendly varnish composition according to The application method of different construction techniques to form a cured coating on the substrate or to prepare a multi-coat finishing system. Background technique [0002] The varnish applied on top of the topcoat to form the outermost protective decorative coating is collectively referred to as finish varnish, which is characterized by high lightness, high gloss, good adhesion, hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/08C09D133/14C09D7/20
CPCC08L2205/02C08L2205/03C09D7/20C09D133/08C09D133/14C08L61/32C08L61/20
Inventor 张景斌张萌孙达
Owner LANGFANG NIPPON PAINT
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