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Method for preparing transparent raw lacquer coating

A technology of raw lacquer coating and preparation method, applied in rosin coatings, natural resin coatings, coatings and other directions, can solve the problems of environmental protection performance to be improved, poor paint transparency, poor heat resistance, etc.

Inactive Publication Date: 2015-03-04
ZHANGJIAJIE LOUJIANG ECOLOGICAL AGRI DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the existing raw lacquer preparation methods all add too many auxiliary materials such as diluents and fillers, and most of them contain organic solvents and metal ion driers such as manganese, lead, mercury, zirconium, etc., and the environmental protection performance needs to be improved. Moreover, most of the produced paints have poor transparency

Method used

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  • Method for preparing transparent raw lacquer coating
  • Method for preparing transparent raw lacquer coating
  • Method for preparing transparent raw lacquer coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of a transparent raw lacquer coating, the specific method and steps are:

[0015] (1) Pretreatment of raw lacquer: Filter and remove impurities from lacquer produced in Sangzhi County, Hunan Province with a water content of 25%, put it into an oxidation polymerizer, and stir at room temperature at a speed of 13-15 rpm until the moisture content of the raw lacquer is 6-6. 8%, until the raw lacquer solution becomes 5-8cm Newton body that can be drawn;

[0016] (2) Pretreatment of linseed oil: Put 50 parts by weight of double-bleached linseed oil into the polymerization pot and heat to 250°C, put in 6 parts by weight of rosin powder and stir and cook together, and turn on the exhaust fan to exhaust the smoke. When the rosin is completely melted, raise the temperature to 270°C, keep it for 10-15 minutes, and check the viscosity. When the linseed oil becomes a 6-10cm Newton body that can be drawn, it can be taken out of the pot, and it is cooled to room ...

Embodiment 2

[0018] Embodiment 2, A preparation method of a transparent raw lacquer coating, the specific method and steps are:

[0019] (1) Pretreatment of raw lacquer: Mix lacquer produced in Sangzhi County, Hunan Province with a water content of 25% and Shaanxi raw lacquer with a water content of 30% in a weight ratio of 1:1 (average water content 27.5%), filter to remove impurities, and put into oxidation polymerization In the machine, stir at room temperature at a speed of 13-15 rpm until the moisture content of the raw lacquer is 6-8%, and the raw lacquer liquid becomes a 5-8cm Newton body that can be drawn;

[0020] (2) Pretreatment of linseed oil: Put 50 parts of double-bleached linseed oil into the polymerization pot and heat to 250°C, put in 5 parts of rosin powder and stir and cook together, and turn on the exhaust fan to exhaust the smoke. When the rosin is completely melted, raise the temperature to 270°C, keep it for 10-15 minutes, and check the viscosity. When the linseed ...

Embodiment 3

[0022] Example 3: A preparation method of a transparent raw lacquer coating, the specific method and steps are:

[0023] (1) Pretreatment of raw lacquer: Mix Maoba lacquer with a water content of 25% in Hunan Sangzhi County and Guizhou raw lacquer with a water content of 32% in a weight ratio of 1:1 (average water content 28.5%), filter to remove impurities, and put in In the oxidation polymerization machine, stir at room temperature at a speed of 13-15 rpm until the moisture content of the raw lacquer is 6-8%, and the raw lacquer liquid becomes a 5-8cm Newton body that can be drawn;

[0024] (2) Pretreatment of linseed oil: put 50 parts of double-bleached linseed oil into the polymerization pot and heat to 250°C, put in 7 parts of rosin powder and stir and cook together, and turn on the exhaust fan to exhaust the smoke. When the rosin is completely melted, raise the temperature to 270°C, keep it for 10-15 minutes, and check the viscosity. When the linseed oil becomes a 6-10...

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Abstract

The invention provides a method for preparing a transparent raw lacquer coating. The method comprises the following steps: (1) filtering and removing impurities in raw lacquer, adding the raw lacquer into an oxidation polymerization machine, stirring at normal temperature till the moisture content of the raw lacquer is 6-8 percent, and allowing the raw lacquer liquid to become drawing Newtonian fluid; (2) adding linseed oil subjected to double drift into a polymerization pot, heating to the temperature of 250 DEG C, adding rosin powder, stirring and boiling together, heating to the temperature of 270 DEG C when the rosin is completely fused, preserving the temperature for 10-15 minutes, discharging from the pot when the linseed oil becomes drawing Newtonian fluid, stirring, exhausting, discharging the smoke, and cooling to normal temperature; and (3) kneading the raw lacquer obtained in the step (1) and the linseed oil obtained in the step (2) in a vacuum kneader for 4-5 hours according to a weight ratio of 50:(45-55), thereby obtaining the transparent raw lacquer coating. According to the method disclosed by the invention, filling agents, diluents and driers of metal ions such as manganese, lead, mercury and zirconium are not added, and the method for preparing the transparent raw lacquer coating is green, environmentally friendly and high in quality.

Description

technical field [0001] The invention belongs to the field of chemical modification treatment of raw lacquer, in particular to a preparation method of transparent raw lacquer coating. technical background [0002] Raw lacquer is a natural paint cut from the lacquer tree (Rhus verniciflua stokes), which needs to be modified and prepared according to the technical requirements before it can be used. Due to the influence of tree species, origin, production methods, storage time and other factors, the quality difference is very obvious. Urushiol, the main film-forming substance in raw lacquer, is a mixture of catechol groups and aliphatic chains, including saturated urushiol, monoene urushiol, diene urushiol, triene urushiol, etc., and these urushiols will Due to the difference in tree species and production areas, the proportion and chemical structure of urushiol in the total amount of urushiol are also different, and the complex composition brings certain difficulties to the m...

Claims

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Application Information

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IPC IPC(8): C09D193/00C09D191/00C09D193/04
CPCC09D193/00C08L2205/035C08L91/00C08L93/04
Inventor 洪克俭高彪
Owner ZHANGJIAJIE LOUJIANG ECOLOGICAL AGRI DEV CO LTD
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