Urush modulating method

Abstract

The invention belongs to the filed of chemical modification processing of paint, in particular relates to a urush modulating method, and provides a high-quality raw lacquer modulating method. The modulating process comprises the following steps: filtering raw lacquer by 300-mesh grass cloth to remove impurities; pouring settled tung oil into a polyreaction pot, and adding bismuth nitrate into the polyreaction pot; regulating the acid value of the tung oil to make the acid value reach between 6.7 and 6.9; keeping the temperature of the tung oil after acid value regulation between 35 and 45 DEG C and adding the raw lacquer and a coloring material for mixing; and grinding the mixture of the raw lacquer, the tung oil and the coloring material, and packaging the mixture to obtain a finished product. The urush modulating method improves the labor production efficiency by adopting a novel process to shorten the drying time, improves the coating performance and physicochemical performance of urush, and makes products have high purity and good quality.

Description

technical field

[0001] The invention belongs to the field of chemical modification treatment of paint, and in particular relates to a preparation method of wide paint. Background technique

[0002] Chinese raw lacquer is an excellent natural lacquer produced in my country. my country's raw lacquer production ranks first in the world. It has always been a traditional export product, and currently it is mainly exported to Japan and Southeast Asian countries. The paint film obtained from Chinese raw lacquer is black, and it can also be made into brownish red. Due to the depth of color, its application range is greatly limited. For a long time, people have tried to make raw lacquer white or light-colored, so as to avoid the needs of different surface coatings and expand the scope of application. So far, although a lot of research work has been done on the structure and properties of raw lacquer at home and abroad, the light-color modification of raw lacquer has not been able t...

Examples

Embodiment Construction

[0019] Below by embodiment the present invention is further illustrated.

[0020] The preparation method of the lacquer of the present invention has been prepared as follows: a. filter 65-70% of the raw lacquer with 300 mesh linen to remove impurities; b. pour the heavy tung oil into the polymerization reaction pot, start the heating device, When it reaches 150°C-160°C, keep it for 20-30 minutes, start the decompression and exhaust device and stirring device, and then continue to heat up. When the temperature reaches 262°C-275°C, turn off the heating device, stop heating, and add tung oil. 0.4%-0.5% bismuth nitrate, gradually lower the temperature to 35°C-45°C, make the viscosity reach 300 seconds / 25°C, apply 4 cups-400 seconds / 25°C, apply 4 cups, close the stirring exhaust device; c. Adjust the tung oil Acid value, adjust the acid value with ammonium oxalate or copper sulfate, so that the acid value reaches ph=6.7-6.9; d. Keep the tung oil with adjusted acid value at a temper...

technical field

[0001] The invention belongs to the field of chemical modification treatment of paint, and in particular relates to a preparation method of wide paint. Background technique

[0002] Chinese raw lacquer is an excellent natural lacquer produced in my country. my country's raw lacquer production ranks first in the world. It has always been a traditional export product, and currently it is mainly exported to Japan and Southeast Asian countries. The paint film obtained from Chinese raw lacquer is black, and it can also be made into brownish red. Due to the depth of color, its application range is greatly limited. For a long time, people have tried to make raw lacquer white or light-colored, so as to avoid the needs of different surface coatings and expand the scope of application. So far, although a lot of research work has been done on the structure and properties of raw lacquer at home and abroad, the light-color modification of raw lacquer has not been able t...

Examples

Embodiment Construction

[0019] Below by embodiment the present invention is further illustrated.

[0020] The preparation method of the lacquer of the present invention has been prepared as follows: a. filter 65-70% of the raw lacquer with 300 mesh linen to remove impurities; b. pour the heavy tung oil into the polymerization reaction pot, start the heating device, When it reaches 150°C-160°C, keep it for 20-30 minutes, start the decompression and exhaust device and stirring device, and then continue to heat up. When the temperature reaches 262°C-275°C, turn off the heating device, stop heating, and add tung oil. 0.4%-0.5% bismuth nitrate, gradually lower the temperature to 35°C-45°C, make the viscosity reach 300 seconds / 25°C, apply 4 cups-400 seconds / 25°C, apply 4 cups, close the stirring exhaust device; c. Adjust the tung oil Acid value, adjust the acid value with ammonium oxalate or copper sulfate, so that the acid value reaches ph=6.7-6.9; d. Keep the tung oil with adjusted acid value at a temper...