Preparation method for butylated melamine-formaldehyde resin

A technology of butylated melamine and formaldehyde resin, which is applied in the field of resin synthesis, can solve the problems of environmental pollution, large amount of by-products, and low recycling rate, and achieve the effects of protecting the environment, simplifying the reaction process, and reducing production costs

Inactive Publication Date: 2016-09-21
安徽省海徽集团日用品有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the reported preparation method of butylated melamine formaldehyde resin has the disadvantages of large amo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Reaction stage:

[0019] Put formaldehyde and butanol into the reaction kettle, add magnesium carbonate and melamine under stirring, control the pH of the reactant at 7-7.5, raise the temperature to 90-92°C and keep it warm for 2.5 hours, after the reaction, cool down to 80°C, then add phthalic anhydride, Adjust the pH to 4.5-5.0, then raise the temperature again to 90-92°C for 2 hours;

[0020] (2) Dehydration stage:

[0021] Put the reactant in the previous step into the extraction kettle through a gear pump, cool down to 80°C, add xylene under stirring, stir for 0.5h, let stand to separate the water layer, the water layer is a by-product, and the by-product includes water, formaldehyde and some raw materials With its own impurities, the organic layer is taken for distillation and dehydration treatment, and the residue is butylated melamine formaldehyde resin solution;

[0022] (3) Viscosity test:

[0023] The above-mentioned obtained butylated melamine formald...

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PUM

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Abstract

The invention discloses a preparation method for butylated melamine-formaldehyde resin and relates to the technical field of resin synthesis. The preparation method comprises the first step of a reaction stage, the second step of a water removing stage, the third step of viscosity checking and the fourth step of a filtering stage. A one-step method is adopted, that is, at the synthesis stage, methanol, melamine, butyl alcohol and other raw materials are mixed and then put into a reaction kettle, reaction conditions are adjusted through magnesium carbonate and phthalic anhydride, hydroxymethylation reaction, condensation polymerization and etherification reaction are carried out at the same time, and the reaction technology is simplified; by carrying out water removing and distilling on reactants, side products and the raw materials are recycled, the side products can be used for methanol items of the same factory, and therefore the environment is protected, and the production cost is reduced.

Description

Technical field: [0001] The invention relates to the technical field of resin synthesis, in particular to a preparation method of butylated melamine formaldehyde resin. Background technique: [0002] Butylated melamine-formaldehyde resin is obtained by dissolving the condensate of melamine and formaldehyde in butanol medium after etherification and polycondensation reaction, and then dissolved in excess butanol. It can be divided into low etherification degree and high etherification degree. Low etherification resin has the characteristics of high hardness, used for nitro, amino and epoxy baking paint, high etherification resin is used for amino, epoxy, acrylic and hammer paint. At present, the reported preparation method of butylated melamine formaldehyde resin has the disadvantages of large amount of by-products and low recycling rate, which not only increases the production cost, but also pollutes the environment. Invention content: [0003] The technical problem to be...

Claims

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Application Information

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IPC IPC(8): C08G12/42C08G12/32
CPCC08G12/427C08G12/32
Inventor 陆国灵
Owner 安徽省海徽集团日用品有限公司
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