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Novel sulfonation melamino-formaldehyde resin and preparation method thereof

A technology for sulfonated melamine and formaldehyde resin, applied in the field of resin materials, can solve the problems of high price of sulfonated melamine formaldehyde resin, inability to use in large quantities, widely used, expensive melamine, etc., and achieves improved reduction effect, high production efficiency, and high production efficiency. simple method effect

Inactive Publication Date: 2016-07-06
SHENZHEN AIYIRUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But, the price of melamine is very expensive, causes the price of sulfonated melamine formaldehyde resin to be higher, cannot be used in a large amount and widely in my country, and the output is extremely small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A kind of preparation method of novel sulfonated melamine formaldehyde resin of the present invention, carry out successively according to the following steps:

[0058] 1) Add 5 parts, 15 parts, 30 parts, and 10 parts of melamine, lauryl alcohol, potassium hydroxide, and activated carbon into the autoclave in sequence, heat up and stir for 9 hours, and stop heating after reaching 170°C Stir and cool to room temperature to obtain crude modified melamine;

[0059] 2) Purifying the obtained crude product modified melamine to obtain high-purity modified melamine;

[0060] 3) Dissolve 20 parts by mass of modified melamine in 15 parts by mass of water and add it to the mixing tank, then add 30 parts by mass of formaldehyde, and stir;

[0061] 4) Add 1 part by mass of sodium hydroxide to the stirred solution, adjust the pH value to 9.0, heat up to 70°C, and keep warm for 45 minutes;

[0062]5) Dissolve 10 parts by mass of sodium metabisulfite in water and add it into the sti...

Embodiment 2

[0067] Compared with Example 1, the mass fraction of melamine is 7 parts, the mass fraction of lauryl alcohol is 17 parts, the mass fraction of potassium hydroxide is 35 parts, the mass fraction of activated carbon is 15 parts, the temperature is raised and stirred for 10 h, Rise to 180 DEG C; The mass fraction of modified melamine is 25 parts, the mass fraction of water is 20 parts, and the mass fraction of formaldehyde is 35 parts; The mass fraction of sodium hydroxide is 3 parts, and the pH value reaches 9.5, The temperature is raised to 75°C; the mass fraction of sodium metabisulfite is 15 parts, the pH value is 11.5, and the temperature is raised to 75°C; the temperature is lowered to 55°C, the mass fraction of sulfuric acid is 5 parts, and the pH value is 3; the mass of saturated calcium hydroxide The number of servings is 3. Other process flow is identical with embodiment one.

Embodiment 3

[0069] Compared with Example 1, the mass fraction of melamine is 10 parts, the mass fraction of lauryl alcohol is 20 parts, the mass fraction of potassium hydroxide is 40 parts, the mass fraction of activated carbon is 20 parts, the temperature is raised and stirred for 11 hours, Rise to 190 DEG C; The mass fraction of modified melamine is 30 parts, the mass fraction of water is 25 parts, and the mass fraction of formaldehyde is 40 parts; The mass fraction of sodium hydroxide is 5 parts, and the pH value reaches 10.0, The temperature is raised to 80°C; the mass fraction of sodium metabisulfite is 20 parts, the pH value is 12.0, and the temperature is raised to 80°C; the temperature is lowered to 60°C, the mass fraction of sulfuric acid is 10 parts, and the pH value is 3.5; the mass of saturated calcium hydroxide The number of servings is 5. Other process flow is identical with embodiment one.

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Abstract

The invention relates to the technical field of resin materials, in particular to a novel sulfonated melamine-formaldehyde resin and a preparation method thereof. The raw materials of the sulfonated melamine-formaldehyde resin include modified melamine, formaldehyde, sodium metabisulfite, sulfuric acid, saturated calcium hydroxide, sodium hydroxide and water. Melamine can be replaced by modified melamine. When melamine is modified with lauryl alcohol Jinxin, its molecular weight can be increased, its production cost can be reduced, and thus it can be mass-produced.

Description

technical field [0001] The invention relates to the technical field of resin materials, in particular to a novel sulfonated melamine-formaldehyde resin and a preparation method thereof. Background technique [0002] Concrete water reducer refers to the ability to reduce the water consumption of concrete while maintaining the same fluidity after being added, thereby improving the strength and durability of concrete, or increasing the amount of concrete when the amount of cement and the water-cement ratio remain unchanged. Fluidity, admixture to improve concrete workability. Water reducing agent can be used alone or compounded with other functional components to form a composite admixture to improve many properties of freshly mixed and hardened concrete. Nowadays, water reducing agent has become the most widely researched and used concrete admixture. It is the fifth component of concrete except cement, sand and stone. Although its dosage is small, its effect is extremely sign...

Claims

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Application Information

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IPC IPC(8): C04B24/22C08G12/32C08G12/40C04B103/30
CPCC04B24/223C04B2103/302C08G12/32C08G12/40
Inventor 苏俊武
Owner SHENZHEN AIYIRUI TECH CO LTD
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