Shellac varnish containing biological insect-resist agent azadirachtin and preparation method of shellac varnish

A technology of azadirachtin and insect repellent, applied in the field of shellac varnish and its preparation, can solve the problem that the shellac varnish is difficult to exert the insect control effect and the like, and achieve the effects of outstanding insect control effect, high safety and perfect function

Inactive Publication Date: 2015-09-09
THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems that the existing shellac varnishes are difficult to play the insect-proof effect, the object of the present invention is to provide a ki

Method used

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  • Shellac varnish containing biological insect-resist agent azadirachtin and preparation method of shellac varnish

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] A. Prepare materials according to the following mass percentages:

[0030] Azadirachtin 0.01%

[0031] Granular shellac 5%

[0032] Methanol 94.99%;

[0033] Among them, azadirachtin is a commercially available product or prepared through the following steps:

[0034] (1) The neem seeds are dehulled with a dehulling machine, and then pressed to remove oil to obtain neem oil cake;

[0035] (2) After crushing the neem oil cake obtained in step (1), add methanol to it for extraction, the mass ratio of oil cake to methanol is oil cake: methanol = 1:5, extract 3 times, and collect the extract;

[0036] (3) The extract obtained in step (2) is concentrated under reduced pressure to recover methanol. The concentration conditions are 35°C and 80hPa. When the volume of the extract is left 1 / 4, add an equal volume of water and mix evenly. Then add the same volume of dichloromethane as the mixed liquid for extraction, collect the dichloromethane layer, concentrate under redu...

Example Embodiment

[0038] Example 2

[0039] A. Prepare materials according to the following mass percentages:

[0040] Azadirachtin 0.4%

[0041] Flake shellac 20%

[0042] Absolute ethanol 79.6%;

[0043] Among them, azadirachtin is a commercially available product or prepared through the following steps:

[0044] (1) The neem seeds are dehulled with a dehulling machine, and then pressed to remove oil to obtain neem oil cake;

[0045] (2) After crushing the neem oil cake obtained in step (1), add methanol to it for extraction, the mass ratio of oil cake to methanol is oil cake: methanol = 1:8, extract twice, and collect the extract;

[0046] (3) The extract obtained in step (2) is concentrated under reduced pressure to recover methanol. The concentration conditions are temperature 40℃ and pressure 100hPa. When the volume of the extract is left 1 / 4, add an equal volume of water and mix evenly. Then add the same volume of dichloromethane as the mixed liquid for extraction, collect the dichloromethane layer,...

Example Embodiment

[0048] Example 3

[0049] A. Prepare materials according to the following mass percentages:

[0050] Azadirachtin 2%

[0051] Bleached shellac 20%

[0052] Ethyl acetate 78%%;

[0053] Among them, azadirachtin is a commercially available product or prepared through the following steps:

[0054] (1) The neem seeds are dehulled with a dehulling machine, and then pressed to remove oil to obtain neem oil cake;

[0055] (2) After crushing the neem oil cake obtained in step (1), add methanol to it for extraction, the mass ratio of oil cake to methanol is oil cake: methanol = 1:10, extract 3 times, and collect the extract;

[0056] (3) The extract obtained in step (2) is concentrated under reduced pressure to recover methanol. The concentration conditions are temperature 30℃, pressure 160hPa, and when concentrated until the volume of the extract remains 1 / 3, add an equal volume of water and mix evenly to obtain a mixture Then add the same volume of dichloromethane as the mixed liquid for extract...

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Abstract

The invention provides shellac varnish containing a biological insect-resist agent azadirachtin and a preparation method of the shellac varnish. The shellac varnish comprises the following components by mass: 0.01 to 2 percent of azadirachtin, 0.1 to 20 percent of shellac, and 78 to 99.89 percent of a solvent. The preparation method comprises the following steps: adding the shellac into the solvent, carrying out stirring till the shellac is dissolved completely, adding the azadirachtin, and carrying out stirring till the azadirachtin is dissolved completely, so as to obtain the shellac varnish. The shellac varnish has the advantages that the insect prevention effect is obvious; the safety and the compatibility are high; the insect prevention and painting functions can be well played; the film-forming property is good; the effects of water resistance, insect prevention, solvent resistance, salt prevention and the like are realized.

Description

technical field [0001] The invention relates to a shellac varnish containing a biological insecticide azadirachtin and a preparation method thereof, belonging to the technical field of biological coatings. Background technique [0002] Lac is a purple-red natural resin secreted by lac insects living on host plants. Sex, and widely used in military industry, electronics and coatings and other industries. [0003] Lac varnishes generally use ethanol as a solvent. Lac varnishes are simple to prepare, easy to use, and dry quickly. The resulting paint film has good adhesion, hard and smooth, transparent and elastic; Pigments do not undergo chemical action, so shellac varnish has been widely used for a long time to remove burrs from the bottom of wood, seal wood exudate, fill wood pores and fix and seal coloring pigments. In addition, it is also used as a surface finishing agent for precious wooden furniture, gun stocks, musical instruments and high-grade wooden handicrafts. ...

Claims

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Application Information

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IPC IPC(8): C09D193/02C09D5/14
CPCC09D193/02C09D5/14
Inventor 段琼芬王有琼马李一张重权
Owner THE RES INST OF RESOURCES INSECTS RIRI OF THE CHINESE ACADEMY OF FORESTRY
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