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Two-component air-dry water-based finishing varnish

A glossy varnish, two-component technology, applied in the direction of coating, can solve the problem of not meeting the performance of water-based coatings, and achieve the effects of excellent water resistance, no pollution to the environment, and strong decoration

Inactive Publication Date: 2010-05-05
CHANGCHUN HUARI PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At this time, countries around the world began to vigorously develop water-based coatings with low VOC content, but single-component water-based coatings cannot meet people’s performance requirements for water-based coatings. Two-component water-based coatings have become the focus of human development of water-based coatings. One-component water-based coatings make the performance of water-based coatings approach or reach the level of solvent-based two-component coatings

Method used

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  • Two-component air-dry water-based finishing varnish
  • Two-component air-dry water-based finishing varnish
  • Two-component air-dry water-based finishing varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 15kg of deionized water as raw material, 0.05kg of organosilicon defoamer, 45kg of hydroxyl group-containing polyacrylate emulsion, 0.05kg of polyether modified polydimethylsiloxane leveling agent, 1kg Modified urea thickener.

[0023] Stir deionized water, polyacrylate emulsion containing hydroxyl groups, silicone defoamer, and polyether-modified polydimethylsiloxane in a dispersion tank, and feed in the above order at intervals of 5 minutes each time. After all the feeding was completed and stirred for another 16 minutes, the stirring was stopped.

[0024] Add the modified urea thickener to the dispersion tank and stir for 10 minutes to stop stirring. Visually check whether the varnish is fully mixed. If not, continue stirring until it is fully mixed.

[0025] Inspection, check whether the appearance, viscosity, and pH value meet the central control index, and filter with 180 mesh silk cloth. 61.1 kg of product was produced.

Embodiment 2

[0030] Weigh the deionized water of 20kg of raw materials, the organosilicon defoamer of 0.1kg, the polyacrylate emulsion containing hydroxyl group of 55kg, the polyether modified polydimethylsiloxane leveling agent of 0.3kg, 1.5 kg of modified urea thickener.

[0031] Stir deionized water, polyacrylate emulsion containing hydroxyl groups, silicone defoamer, and polyether-modified polydimethylsiloxane in a dispersion tank, and feed in the above order at intervals of 5 minutes each time. After all the feeding was completed and stirred for another 16 minutes, the stirring was stopped.

[0032] Add the modified urea thickener to the dispersion tank and stir for 10 minutes to stop stirring. Visually check whether the varnish is fully mixed. If not, continue stirring until it is fully mixed.

[0033] Inspection, check whether the appearance, viscosity, and pH value meet the central control index, and filter with 180 mesh silk cloth. 76.9 kg of product was produced.

[0034] Appl...

Embodiment 3

[0038] Weigh the deionized water of 18kg of raw materials, the organosilicon defoamer of 0.08kg, the polyacrylate emulsion containing hydroxyl group of 50kg, the polyether modified polydimethylsiloxane leveling agent of 0.2kg, 1.12 kg of modified urea thickener.

[0039] Stir deionized water, polyacrylate emulsion containing hydroxyl groups, silicone defoamer, and polyether-modified polydimethylsiloxane in a dispersion tank, and feed in the above order at intervals of 5 minutes each time. After all the feeding is completed and stirred for another 18 minutes, the stirring is stopped.

[0040] Add the modified urea thickener to the dispersion tank and stir for 10 minutes to stop stirring. Visually check whether the varnish is fully mixed. If not, continue stirring until it is fully mixed.

[0041] Inspection, check whether the appearance, viscosity, and pH value meet the central control index, and filter with 180 mesh silk cloth. 69.4 kg of product was produced.

[0042] Appl...

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Abstract

A two-component air-dry water-based finishing varnish relates to the chemical technology field. The finishing varnish comprises the following raw materials by weight percent: 45-55 of polyacrylate emulsion containing hydroxyl groups, 30-35 of hydrophilic aliphatic polyisocyanate curing agents, 15-20 of deionized water and 1.1-1.9 of auxiliaries. The finishing varnish has the following beneficial effects: (1) the product is characterized by being non-combustible, non-toxic and environmentally friendly and saving energy, etc, thus being best suitable for coating on the inner and outer surfaces of the transportation such as various trains, cars, aircrafts and the like; (2) the films formed by the paint have high mechanical properties, and each property approaches or reaches the level of that of the solvent-based two-component paint; (3) the product can be cured under normal temperature and has excellent water resistance, solvent resistance and chemical reagent resistance; and (4) the product has strong decorative effect and simple and convenient construction.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to the improvement of a paint production technology. Background technique [0002] At present, solvent-based coatings for industrial vehicle body coating use raw materials that are harmful to the human body and the environment during the production process, and most of them will volatilize into the atmosphere during the construction process or within a certain period of time after construction. Therefore, solvent-based coatings have important adverse effects on the environment, which has attracted widespread attention. [0003] At this time, countries around the world began to vigorously develop water-based coatings with low VOC content, but single-component water-based coatings cannot meet people’s performance requirements for water-based coatings. Two-component water-based coatings have become the focus of human development of water-based coatings. One-component water-base...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D7/12C09D5/00
Inventor 陈冬冬贺浩然张大鹏
Owner CHANGCHUN HUARI PAINT
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