High-toughness and water-resistant modified melamine urea-formaldehyde resin
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A melamine urea-formaldehyde resin and melamine technology, applied in the field of modified melamine urea-formaldehyde resin, can solve the problems of low flexibility and poor water resistance of the resin, and achieve the effects of being rich in elasticity, improving water resistance and improving water resistance
Inactive Publication Date: 2015-03-04
CHONGZHOU HERUI TECH
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[0002] Urea-formaldehyde resin has the advantages of convenient source of raw materials, cheap price, and good operability. The traditional process uses alkali, acid, and alkali processes to synthesize urea-formaldehyde resin under high temperature conditions, but the resin synthesized by this method has the characteristics of poor water resistance and low flexibility.
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Embodiment 1
[0024] A total of 100 kilograms of raw materials, which are made from the following raw materials in parts by weight:
[0034] Mix urea, formaldehyde, sodium dihydrogen phosphate and water in turn, heat to 45°C and stir for 2 hours, then add melamine, oleoydiethanolamine, polyethylene glycol, nonylphenol polyoxyethylene ether (n=4), and control the temperature at 50°C, stir for 2 hours, add hydrochloric acid to cool to room temperature after complete dissolution, and obtain modified melamine urea-formaldehyde resin.
Embodiment 2
[0036] A total of 100 kilograms of raw materials, which are made from the following raw materials in parts by weight:
[0046] Mix urea, formaldehyde, sodium dihydrogen phosphate and water in sequence, heat to 50°C and stir for 1.5 hours, then add melamine, linoleoyldiethanolamine, polyethylene glycol, octylphenol polyoxyethylene ether (n=5), Control the temperature at 60°C, stir for 1 hour, add hydrochloric acid to cool to room temperature after complete dissolution, and obtain the modified melamine urea-formaldehyde resin.
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Abstract
The invention provides high-toughness and water-resistant modified melamine urea-formaldehyde resin. The high-toughness and water-resistant modified melamine urea-formaldehyde resin is prepared from the following raw materials in parts by weight: 80 parts of urea, 160-220 parts of formaldehyde, 10-20 parts of melamine, 5-10 parts of fatty acid amide, 5-8 parts of polyethylene glycol, 3-6 parts of alkylphenol ethoxylate, 2-5 parts of sodium dihydrogen phosphate, 1-3 parts of hydrochloric acid and 20-30 parts of water. The high-toughness and water-resistant modified melamine urea-formaldehyde resin provided by the invention can effectively improve the toughness and water resistance of the urea-formaldehyde resin. A resin modifying component contained in the high-toughness and water-resistant modified melamine urea-formaldehyde resin provided by the invention can participate in co-condensation polymerization reaction of the resin to change the resin structure and reduce crosslinking density, thereby increasing foam strength, increasing toughness, reducing brittleness, being rich in elasticity and increasing stability.
Description
technical field [0001] The invention relates to the field of melamine resin production, in particular to a modified melamine urea-formaldehyde resin with high toughness and water resistance. Background technique [0002] Urea-formaldehyde resin has the advantages of convenient source of raw materials, cheap price, and good operability. The traditional process uses alkali, acid, and alkali processes to synthesize urea-formaldehyde resin under high temperature conditions, but the resin synthesized by this method has the characteristics of poor water resistance and low flexibility. [0003] Melamine is a 6-functional compound with a triazine heterocyclic structure, with 3 NH 2 Group, has 6 reactive hydrogen atoms, so if melamine is introduced into urea-formaldehyde resin and modified on it, the water resistance and flexibility of urea-formaldehyde resin will be greatly improved. Contents of the invention [0004] The purpose of the present invention is to provide a modified ...
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