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Modified raw lacquer and preparation thereof

A kind of non-toxic raw lacquer and raw lacquer technology, applied in the direction of natural resin chemical modification, coating, natural resin coating, etc., can solve problems that have not yet been discovered, and achieve simple and easy operation, low production cost, impact resistance and adhesion enhanced effect

Inactive Publication Date: 2011-01-12
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, no literature or patent application has been found to modify raw lacquer by using rosin to improve the performance of raw lacquer film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Add solid rosin powder to a 500mL three-neck flask equipped with raw lacquer, control the ratio of the weight of rosin added to the weight of raw lacquer to be 5:100, and stir evenly;

[0035] 2) Connect one interface in the three-necked flask to the vacuum distillation device, and connect the other two interfaces to a thermometer and a stirrer respectively, then heat, stir and vacuumize under reduced pressure, and control the vacuum degree in the three-necked flask to be -0.09Mpa (ie With one atmospheric pressure being 0 and the relative vacuum relative to one atmospheric pressure being -0.09Mpa), the mixture of rosin and raw lacquer was heated to 50°C and reacted for 3 hours under this condition to obtain the modified raw lacquer.

Embodiment 2

[0037] 1) Add solid rosin powder to a 500mL three-neck flask equipped with raw lacquer, control the weight ratio of the added solid rosin to the weight of raw lacquer to be 10:100, and stir evenly;

[0038] 2) Connect one interface in the three-necked flask to the vacuum distillation device, and connect the other two interfaces to a thermometer and a stirrer respectively, then heat, stir and vacuumize under reduced pressure, and control the vacuum degree in the three-necked flask to be -0.07Mpa (ie With one atmospheric pressure being 0 and the relative vacuum relative to one atmospheric pressure being -0.07Mpa), the mixture of rosin and raw lacquer was heated to 45°C and reacted for 4 hours under these conditions to obtain the modified raw lacquer.

Embodiment 3

[0040] 1) In a 500mL three-neck flask equipped with raw lacquer, add a mass percentage concentration of 20% rosin ethanol solution, control the ratio of the weight of the added rosin to the weight of raw lacquer to be 5: 100, and stir evenly;

[0041] 2) Connect one interface in the three-necked flask to the vacuum distillation device, and connect the other two interfaces to a thermometer and a stirrer respectively, then heat, stir and vacuumize under reduced pressure, and control the vacuum degree in the three-necked flask to be -0.08Mpa (ie With one atmospheric pressure being 0 and the relative vacuum relative to one atmospheric pressure being -0.08Mpa), the mixture of rosin and raw lacquer was heated to 70°C and reacted for 3 hours under this condition to obtain the modified raw lacquer.

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PUM

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Abstract

The invention discloses a modified raw lacquer and a method for preparing the same; and the method for preparing the modified raw lacquer adopts raw lacquer and rosin to perform esterification reaction. A lacquer film of the raw lacquer prepared by the method remarkably improves the performance, obviously shortens the drying time and remarkably improves the adhesive force, impact resistance and scratch hardness.

Description

technical field [0001] The invention relates to a natural resin coating composition and a preparation method thereof, in particular to a raw lacquer and a preparation method thereof. Background technique [0002] The economic value of raw lacquer is very high. It has corrosion resistance, wear resistance, acid resistance, solvent resistance, heat resistance, good water insulation and insulation, and is rich in luster. High-quality coatings are also one of the important materials traditionally exported by my country, and are famous for their high quality and quantity. Raw lacquer liquid film is hard and lustrous. It is a natural coating with excellent aging resistance, acid resistance, alkali resistance, water resistance, high temperature resistance, organic solvent resistance, abrasion resistance and insulation performance. It is commonly known as "the king of coatings". [0003] However, raw lacquer has serious allergic toxicity to the human body, and it must be dried under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D193/00C09F1/04
Inventor 宋先亮蒋建新
Owner BEIJING FORESTRY UNIVERSITY
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