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Impregnation solution, preparation method and impregnation treatment method of soft melamine foam

A technology of melamine and impregnating liquid, which is applied in the production field of soft melamine foam, can solve the problems of incompleteness, decrease of water-repellent and oil-repellent effect, change of foam structure, etc., and achieve the effect of improving mechanical properties and sound-absorbing and heat-insulating effects

Active Publication Date: 2018-02-23
CHENGDU YULONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the existing technology, there are two processes for obtaining soft melamine foam that is hydrophobic and oil-repellent: one is to modify the water-repellent and oil-repellent foam before foaming, such as the invention patent with the patent number "ZL 200780011962. , all adopt the technical scheme of water-repellent and oil-repellent modification before foaming. However, this method is easy to break the original foaming system, change the original structure of the foam, and even reduce the performance of the foam. Therefore, in actual production, almost Difficult to achieve; the other is to carry out surface dipping coating treatment on the formed foam, such as the invention patent with the patent number "ZL 200680030823.2", to carry out surface dipping coating treatment on the formed foam, but use water and oil repellent alone The impregnation or coating effect of the modifier is not ideal, and it may be incomplete and incompletely water- and oil-repellent, or after long-term use, the water- and oil-repellent effect decreases or disappears, and some water- and oil-repellent agents are still Will change the mechanical properties or flame retardant properties of the original foam
[0004] To sum up, through the above traditional methods, although the hydrophobic and oil-repellent requirements can be met to a certain extent, the effect is not very satisfactory and needs further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare the dipping solution as follows:

[0025] 1. First prepare the low molar ratio melamine-formaldehyde resin: (1) in the reactor, stir and mix 378g melamine, 144g paraformaldehyde, and 783g water; (2) adjust the pH to 9.0-9.5 with triethanolamine; (3) Then heat up to 95°C for constant temperature reaction. When the reaction solution turns from turbid to clear, add 13g of sodium metabisulfite to continue the reaction, and take samples to monitor the cloud point. When the cloud point reaches 60°C, stop the reaction, and quickly cool the resin to room temperature with ice water. , to obtain a transparent low molar ratio melamine-formaldehyde resin with a molar ratio of melamine and formaldehyde of 1:1.6 and a solid content of about 40%.

[0026] 2. Then prepare the impregnation solution: 400g of product number FC-80 and fluorocarbon resin liquid with a solid content of 20%, 200g of the above-mentioned low molar ratio melamine formaldehyde resin, 20g of product number...

Embodiment 2

[0038] Prepare the dipping solution as follows:

[0039] 1, first prepare low molar ratio melamine-formaldehyde resin: (1) in reactor, 378g melamine, 389g formaldehyde solution (37%), 538g water are stirred and mixed; (2) adjust pH with triethanolamine to be 9.0~9.5; (3) Then heat up to 95°C for constant temperature reaction. When the reaction solution turns from turbid to clear, add 13g of sodium pyrosulfite to continue the reaction, and take samples to monitor the cloud point. When the cloud point reaches 68°C, stop the reaction, and the resin will be quickly soaked in ice water. Cool to room temperature to obtain a low molar ratio melamine-formaldehyde resin with a molar ratio of melamine and formaldehyde of 1:1.6 and a solid content of about 40%.

[0040]2. Then prepare the impregnation solution: mix 400g of fluorocarbon resin liquid with product number FC-80 and a solid content of 20%, 200g of the above-mentioned low molar ratio melamine formaldehyde resin, 40g of silicon...

Embodiment 3

[0044] Prepare the dipping solution as follows:

[0045] 1, first prepare low molar ratio melamine-formaldehyde resin: (1) in reactor, 378g melamine, 487g formaldehyde solution (37%), 251g water are stirred and mixed evenly; (2) adjust pH with triethanolamine to be 9.5~10.0; (3) Then heat up to 90°C for constant temperature reaction. When the reaction solution turns from turbid to clear, add 5.5g of sodium metabisulfite to continue the reaction, and take samples to monitor the cloud point. When the cloud point reaches 65°C, stop the reaction, and put the resin in ice water Rapidly cool down to room temperature to obtain a low molar ratio melamine-formaldehyde resin with a molar ratio of melamine and formaldehyde of 1:2 and a solid content of about 50%.

[0046] 2. Then prepare the impregnation solution: mix 300g of the fluorocarbon resin solution with the product number FC-80 and a solid content of 20%, 100g of the above-mentioned low molar ratio melamine formaldehyde resin, 3...

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PUM

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Abstract

The invention discloses a dipping solution for soft melamine foam, which comprises the following raw materials: fluorocarbon resin, melamine-formaldehyde resin with low molar ratio, solvent, pH regulator and organic silicon surfactant. The invention discloses a method for preparing a dipping liquid of soft melamine foam. A low molar ratio melamine-formaldehyde resin is prepared by using formaldehyde, melamine, water and sodium pyrosulfite. The invention discloses an immersion treatment method using an immersion liquid of soft melamine foam. The soft melamine foam is placed in the immersion liquid and then sequentially squeezed, dried, baked and cooled after immersion. The soft melamine foam impregnated with the impregnating solution of the present invention has a durable water-repellent and oil-repellent effect, while maintaining the flame retardancy of the original soft melamine foam, and significantly improving the mechanical properties of the melamine foam, which can be widely used Applied in construction, transportation, and industrial fields, it has the value of popularization and application.

Description

technical field [0001] The invention relates to a soft melamine foam dipping liquid, a preparation method and a dipping treatment method, belonging to the field of soft melamine foam production. Background technique [0002] Soft melamine foam is a network-like, open-cell foam plastic with excellent flame-retardant properties. It can replace polyurethane sponge or other sound-absorbing and heat-insulating materials and is widely used in construction, transportation, and industrial fields. It plays a significant role. Excellent heat insulation and sound absorption effect. Due to the raw material characteristics and open-cell structure of melamine foam, melamine foam has certain water and oil absorption characteristics. When melamine foam is soaked in water and oil, it will affect its heat insulation and sound absorption effect, which limits melamine foam. scope of application. Therefore, it is necessary to modify the flexible melamine foam to be hydrophobic and oil-repellen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08G12/32C08L61/28
Inventor 叶锐苟航张路付豪苏华
Owner CHENGDU YULONG CHEM