A kind of benzomelamine modified amino resin and preparation method thereof

A technology of benzomelamine and amino resin, which is applied in the field of benzomelamine modified amino resin and its preparation, can solve the problems of heat resistance to be improved, poor miscibility, etc., and achieve suitable industrial production promotion, mild control conditions, The effect of easy access to raw materials

Active Publication Date: 2021-04-13
ZHEJIANG XINHUA NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this resin has the following disadvantages: poor compatibility with the matrix resin, gloss, alkali resistance, water resistance, heat resistance and other properties need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, add 105g of liquid formaldehyde with a mass concentration of 37%, add 30g of recovered light methanol water with a mass concentration of 20%, start stirring, add 2-9g of liquid caustic soda with a mass concentration of 30%, adjust the pH=8.5-9, and then add mass 22.5g of melamine with a concentration of 99.8%, and 3g of phenylenediamine;

[0021] In the second step, stir evenly, raise the temperature to 40°C, turn off the steam for exothermic reaction, slowly raise the temperature to 50°C, completely dissolve, the reaction solution is clear, when the temperature rises to 60°C, the reaction solution is turbid, start recording the time, and maintain the methylolation reaction 3h, the end point temperature is controlled at 75-80°C;

[0022] In the third step, after the completion of the first hydroxylation reaction, add 110 g of methanol with a mass concentration of 90%, and when the temperature is 48°C, add 1-9 g of hydrochloric acid with a mass concentration of 36...

Embodiment 2

[0035] First, add 52.5g of liquid formaldehyde with a mass concentration of 37%, add 15g of recovered light methanol water with a mass concentration of 20%, start stirring, add 1-4.5g of liquid caustic soda with a mass concentration of 30%, adjust the pH=8.5-9, and then Add 11.25 g of melamine with a mass concentration of 99.8%, and 1.5 g of phenylenediamine;

[0036] In the second step, stir evenly, raise the temperature to 40°C, turn off the steam for exothermic reaction, slowly raise the temperature to 50°C, completely dissolve, the reaction solution is clear, when the temperature rises to 60°C, the reaction solution is turbid, start recording the time, and maintain the methylolation reaction 3h, the end point temperature is controlled at 75-80°C;

[0037] The third step, after the first hydroxylation reaction is completed, add 55g of methanol with a mass concentration of 90%, when the temperature is 48°C, add 0.5-4.5g of hydrochloric acid with a mass concentration of 36%, ...

Embodiment 3

[0050]First, add 157.5g of liquid formaldehyde with a mass concentration of 37%, add 45g of recovered light methanol water with a mass concentration of 20%, start stirring, add 3-13.5g of liquid caustic soda with a mass concentration of 30%, adjust the pH=8.5-9, and then Add 33.75 g of melamine with a mass concentration of 99.8%, and 1.5 g of phenylenediamine;

[0051] In the second step, stir evenly, raise the temperature to 40°C, turn off the steam for exothermic reaction, slowly raise the temperature to 50°C, completely dissolve, the reaction solution is clear, when the temperature rises to 60°C, the reaction solution is turbid, start recording the time, and maintain the methylolation reaction 3h, the end point temperature is controlled at 75-80°C;

[0052] The third step, after the first hydroxylation reaction is completed, add 165g of methanol with a mass concentration of 90%, when the temperature is 48°C, add 1.5-13.5g of hydrochloric acid with a mass concentration of 36...

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Abstract

The invention discloses a benzomelamine-modified amino resin, which comprises the following components: 105 parts of liquid formaldehyde with a mass concentration of 37%, 22.5 parts of melamine with a mass concentration of 99.8%, and 3 parts of benzotriamine , 110 parts of methanol with a mass concentration of 90%-92%, 64 parts of methanol with a mass concentration of 98%, and 30 parts of reclaimed light methanol water with a mass concentration of 20%. This reclaimed light methanol water contains formaldehyde with a mass fraction of 10%. 2-13 parts of 36% hydrochloric acid, 3-18 parts of liquid caustic soda with a mass concentration of 30%; the benzomelamine modified amino resin of the present invention introduces benzotriamine, which reduces the overall molecular polarity and the solubility with organic solvents Increased, the miscibility with the matrix resin has been greatly improved, and the gloss, alkali resistance, water resistance, and heat resistance are all more advantageous than those of the prior art. It also has excellent electrophoretic advancement and excellent coating film Chemical resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical coatings, in particular to a benzomelamine-modified amino resin and a preparation method thereof. Background technique [0002] Generally speaking, coatings can be divided into two parts: architectural coatings and industrial coatings. Industrial coatings can be used in automobiles, ships, railways, bridges, electronic engineering, biological engineering, industrial and agricultural machinery, home decoration, pipeline transportation and other fields. The application of industrial coatings is very extensive, and its usage accounts for 60-70% of the total coatings, which is an important part of the coatings industry. [0003] In traditional industrial coatings, such as 5747 high-hydroxy methyl etherified melamine resin, it is a resin obtained by condensing 1 mol melamine and 3-6 mol formaldehyde, and then etherifying it with methanol. However, the resin has the following disadvantages: poor misci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/34
CPCC08G12/34
Inventor 王正强周毛荣谌兴旺
Owner ZHEJIANG XINHUA NEW MATERIAL TECH CO LTD
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