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Process for preparing butanol etherification benzene substituted melamine formaldehyde resin

A technology of benzoic melamine and a production method, which is applied in the production field of butanol-etherified benzoic melamine formaldehyde resin, can solve problems such as harming operator health, affecting coating film quality, affecting product quality, etc., and achieving high production cost and reduced production costs. The effect of free formaldehyde content and stable product quality

Inactive Publication Date: 2010-07-14
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of product performance requirements, the free formaldehyde content in the product is required to be ≤1%, because free formaldehyde causes environmental pollution, is harmful to the health of operators, and will affect the quality of the coating film when the product is continued to be processed into coatings
Foreign production plants usually use thin film evaporation to remove free formaldehyde, but the investment cost of thin film evaporation is large and the production cost is high
The butanol-etherified benzomelamine formaldehyde resin products of domestic manufacturers have been high in free formaldehyde for many years, seriously affecting product quality. Therefore, we are looking for a treatment method that requires less investment, is effective, and is easy to operate to remove free formaldehyde. , is a practical problem that people have long expected to solve

Method used

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  • Process for preparing butanol etherification benzene substituted melamine formaldehyde resin
  • Process for preparing butanol etherification benzene substituted melamine formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take benzomelamine: formaldehyde: butanol gram ratio is: 1: 3.12: 4.02. Put 259Kg of liquid formaldehyde (concentration 37%) and solid formaldehyde (concentration 93%) 72Kg in the 2T glass-lined reactor to form a transparent formaldehyde solution with a concentration of 50%. Add 325Kg of benzomelamine, 510Kg of butanol and 100Kg of xylene as a dehydrating agent in sequence, and adjust the pH to 7.5 with 20% sodium hydroxide lye. Heating, reacting at reflux temperature of 92°C for 0.5 hours, dehydration, gradually rising with the temperature of moisture removal, when reaching 95°C, the water output is about 120Kg. Then add 1.14Kg of phthalic anhydride to adjust the pH to 4.6-4.8, react and dehydrate at the reflux temperature until the temperature of the reaction system rises to 108°C, and then distill out about 250Kg of butanol (butanol can be recycled and applied mechanically). Then add 15Kg of urea, 200Kg of butanol, and 30Kg of xylene, react at a temperature of 100°C...

Embodiment 2

[0024] The ratio of benzomelamine: formaldehyde: butanol in grams is 1: 2.95: 4.20. Put 236Kg of liquid formaldehyde (concentration 37%) and solid formaldehyde (concentration 93%) 71.5Kg in the 2T glass-lined reactor to form a transparent formaldehyde solution with a concentration of 50%. Add 325Kg of benzomelamine, 540Kg of butanol, and 100Kg of xylene as a dehydrating agent in sequence, and adjust the pH to 8.0 with 20% potassium hydroxide lye. Heating, reacting at reflux temperature of 92°C for 1 hour, dehydration, the temperature gradually rises with the release of water, and the water output is about 120Kg when it reaches 99°C. Then add 1.20Kg of phthalic anhydride to adjust the pH to 4.6-4.8, react and dehydrate at reflux temperature until the temperature of the reaction system rises to 108°C, then distill out about 250Kg of butanol (butanol can be recycled and used mechanically). Then add 15Kg of urea, 200Kg of butanol, and 30Kg of xylene, react at a temperature of 105...

Embodiment 3

[0026] The ratio of benzomelamine: formaldehyde: butanol in grams is 1: 3.30: 3.80. Put 257.5Kg of liquid formaldehyde (concentration 37%) and solid formaldehyde (concentration 93%) 82.5Kg in the 2T glass-lined reactor to form a transparent formaldehyde solution with a concentration of 50%. Add 325Kg of benzomelamine, 488Kg of butanol, and 100Kg of xylene as a dehydrating agent in sequence, and adjust the pH to 7.8 with 20% sodium hydroxide lye. Heating, reacting at the reflux temperature of 92°C for 45 minutes, dehydration, the temperature gradually rises with the release of water, and the water output is about 120Kg when it reaches 97°C. Then add 1.15Kg of phthalic anhydride to adjust the pH to 4.6-4.8, react and dehydrate at the reflux temperature until the temperature of the reaction system rises to 108°C, and then distill out about 250Kg of butanol (butanol can be recycled and applied mechanically). Then add 15Kg of urea, 200Kg of butanol, and 30Kg of xylene, react at a ...

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Abstract

The invention discloses a production method of butanol etherified benzoguanamine formaldehyde resin. The butanol etherified benzoguanamine formaldehyde resin is synthesized through using melamine, formaldehyde and butanol as source raw materials. The production method comprises the steps of benzoguanamine and formaldehyde carrying out hydroxymethylation to benzoguanamine and formaldehyde in alkaline conditions, and then carrying outhaving etherification with the butanol in sub-acid conditions, the etherified product and further carrying out dimolecular condensation polymerization to the etherified product, treating the product through simple chemical method and reducing the free formaldehyde in the resin product to make the resin product reach the technical index of industrial products which is smaller than or equal to 1 percent. The method is characterized in by simple operation, little investment, good effect and stable product quality, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a production method of benzomelamine resin, in particular to a production method of butanol etherified benzomelamine formaldehyde resin. Background technique [0002] Butanol-etherified benzomelamine-formaldehyde resin is suitable for high-quality and high-performance industrial topcoat, and is also widely used as a coating for light industrial products such as refrigerators, bicycles, sewing machines, home appliances, cans, and automobiles, sheets, coils, etc. Products. [0003] Benzomelamine-based resins are developing rapidly abroad, and the manufacturers include American Cytec, Nippon Shokubai, Italy Galstaef and other companies, and there are many types of resins. About the production of butanol etherified benzomelamine formaldehyde resin, basically all are to take benzomelamine, formaldehyde and butanol as raw materials. In terms of product performance requirements, the free formaldehyde content in the product is require...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/42
Inventor 雍武刚马翠萍江华
Owner SHANGHAI HUAYI FINE CHEM CO LTD