Wood modifier and preparation method thereof

[0040] Example 1

[0041] 1. Prepare raw materials according to the following weight ratio:

[0042]

[0043] The catalyst is a yellowish green powder prepared by the Environmental Flame Retardant Technology Center of the School of Materials Science and Technology, Beijing Forestry University: 40g tin chloride, 80g copper sulfate, 35g sodium chloride, 40g ferric chloride, 40g aluminum sulfate, 45g boric acid and chlorine 70g zinc (grind according to the proportion and pulverize evenly).

[0044] 2. Preparation method:

[0045] 1) In a reactor equipped with a stirrer, a temperature and pressure display, and a condenser, add phosphoric acid in the reaction raw materials, stir while heating, and raise the temperature to 60°C;

[0046] 2) Add all the urea into the reactor, and continue to stir the mixture of phosphoric acid and urea at the same time, so that the materials are distributed and heated evenly;

[0047] 3) When heating is continued to increase the temperature to 120°C, the catalyst is slowly and uniformly added to the reaction kettle to make the mixture react, and the reaction material turns light green;

[0048] 4) Continue heating to make the temperature reach 135℃, and observe the reaction phenomenon while heating. As the temperature rises, the light green liquid gradually turns into a milky white viscous substance, the foam increases sharply, the temperature rise speed is significantly faster, and the volume of the material expands rapidly , A large amount of gas is discharged from the condenser tube. When the volume of the reactants in the reactor increases to twice the original volume, stop heating and continue stirring. The materials in the reactor react violently by their own exothermic heat, and the temperature continues to rise. When it is stable and the temperature starts to drop, it indicates that the reaction is complete;

[0049] 5) Cool down to 70°C, add butanetetracarboxylic acid and demineralized water at 50°C to the reaction kettle, and stir for 30 minutes;

[0050] 6) Cool down to 30°C, and pour the resulting product into a container for storage.

[0051] 3. Product technical indicators:

[0052]

[0053] Example 2

[0054] 1. Prepare raw materials according to the following weight ratio:

[0055]

[0056] The catalysts are: tin chloride 40g, copper sulfate 135g, sodium chloride 45g, ferric chloride 45g, aluminum sulfate 65g, boric acid 65g and zinc chloride 85g (grind according to the proportion and pulverize uniformly).

[0057] 2. Preparation method:

[0058] 1) In a reactor equipped with a stirrer, a temperature and pressure display, and a condenser, add phosphoric acid in the reaction raw materials, stir while heating, and raise the temperature to 50°C;

[0059] 2) Add urea to the reaction kettle, and continue to stir the mixture of phosphoric acid and urea at the same time, so that the materials are distributed and heated evenly;

[0060] 3) When heating continues to increase the temperature to 115°C, slowly and uniformly add catalyst to the reaction kettle to make the mixture react;

[0061] 4) Continue heating to make the temperature reach 140℃, and observe the reaction phenomenon while heating. As the temperature rises, the light green liquid gradually turns into a milky white viscous substance, the foam increases sharply, the temperature rise speed is significantly faster, and the volume of the material expands rapidly , A large amount of gas is discharged from the condenser tube. When the volume of the reactants in the reactor increases to twice the original volume, stop heating and continue stirring. The materials in the reactor react violently by their own exothermic heat, and the temperature continues to rise. When it is stable, the temperature does not rise any more, and when the temperature starts to drop, the reaction is complete;

[0062] 5) Cool down to 80°C, add butanetetracarboxylic acid and demineralized water at 50°C to the reactor, and stir for 35min;

[0063] 6) Cool down to 30°C, and pour the resulting product into a container for storage.

[0064] 3. Product technical indicators:

[0065]

[0066] Example 3

[0067] 1. Prepare raw materials according to the following weight ratio:

[0068]

[0069]

[0070] The catalyst is: 35g tin chloride, 45g copper sulfate, 35g sodium chloride, 35g iron chloride, 25g aluminum sulfate, 25g boric acid and 80g zinc chloride (grind according to the proportion and pulverize uniformly).

[0071] 1) In a reactor equipped with a stirrer, a temperature and pressure display, and a condenser, add phosphoric acid in the reaction raw materials, stir while heating, and raise the temperature to 60°C;

[0072] 2) Add urea to the reaction kettle, continue to stir the mixture of phosphoric acid and urea, so that the materials are distributed and heated evenly;

[0073] 3) When heating is continued to increase the temperature to 110°C, the catalyst is slowly and uniformly added to the reaction kettle to make the mixture react, and the reaction material turns light green;

[0074] 4) Continue heating to make the temperature reach 130℃, and observe the reaction phenomenon while continuing heating. As the temperature rises, the light green liquid gradually turns into a milky white viscous substance, the foam increases sharply, the temperature rise speed is significantly faster, and the volume of the material is rapid Expansion, the condenser tube has a large amount of gas discharged, mainly ammonia and water vapor, which are absorbed by water. When the volume of the reactants in the reactor increases to twice the original volume, stop heating and continue stirring. The materials in the reactor depend on their own release. The heat is reacting violently, and the temperature continues to rise. When the reaction stabilizes, the temperature no longer rises. When the temperature starts to drop, the reaction is complete;

[0075] 5) Cool down to 60°C, add butanetetracarboxylic acid and demineralized water at 50°C to the reactor, and stir for 25min;

[0076] 6) Cool down to 40°C, and pour the obtained product into a container for storage.

[0077] 3. Product technical indicators:

[0078]