High-flame-retardant hydrophobic oleophobic melamine foam and preparation method and application thereof
A technology of oleophobic melamine and melamine, which is applied in the field of high flame retardancy, hydrophobic and oleophobic melamine foam and its preparation, can solve the problems of low flame retardancy and unstable components of melamine foam, and achieve good water and oil repellency and Flame retardant performance, low cost and simple operation
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Embodiment 1
[0044] A kind of preparation method of highly flame-retardant, hydrophobic and oleophobic melamine foam:
[0045] (1) Synthesis of melamine resin liquid: add 150g of water, 2g of 30% sodium hydroxide solution, 0.05g of magnesium hydroxide, 180g of paraformaldehyde and stir in the reaction kettle;
[0046] When the temperature reaches 60°C, add 250g melamine and 10g modifier sodium metabisulfite to continue the heating reaction;
[0047] When the temperature reaches 85°C, keep it warm for 40 minutes and then cool down;
[0048]When the temperature drops to 60°C, adjust the pH value between 8-9 with sodium hydroxide solution, add 30g of flame retardant modifier PEG-8 dimethicone (water-soluble siloxane), keep it warm for 20min and then cool to room temperature. Obtain melamine resin liquid;
[0049] (2) Preparation of highly flame-retardant melamine foam foaming liquid: First add 150 g of the melamine resin liquid prepared in step (1) to the stirring tank, then add 5 g of emul...
Embodiment 2
[0054] A kind of preparation method of highly flame-retardant, hydrophobic and oleophobic melamine foam:
[0055] (1) Synthesis of melamine resin liquid: add 200g of water, 3.2g of 30% sodium hydroxide solution, 0.05g of magnesium hydroxide, 240g of paraformaldehyde and stir in the reaction kettle;
[0056] When the temperature reaches 60°C, add 400g melamine and 10g modifier sodium bisulfite to continue the heating reaction;
[0057] When the temperature reaches 90°C, keep it warm for 60 minutes and then cool down;
[0058] When the temperature drops to 60°C, adjust the pH value between 8-9 with sodium hydroxide solution, add 50g of flame retardant modifier (α, ω-dihydroxypolydimethylsiloxane) and keep it warm for 20min, then cool to Room temperature, obtains melamine resin liquid;
[0059] (2) Preparation of highly flame-retardant melamine foam foaming liquid: first add 150 g of the melamine resin liquid prepared in step (1) to the stirring tank, and then add the compound ...
Embodiment 3
[0064] Example 3 prepares a kind of highly flame-retardant, hydrophobic and oleophobic melamine foam. The difference from Example 1 is that the raw materials therein consist of: melamine 300g, paraformaldehyde 225g, water 150g, sodium metabisulfite 10g, 30% 2 g of sodium hydroxide solution, 0.05 g of magnesium hydroxide, and 30 g of α, ω-dihydroxy polydimethylsiloxane. The preparation steps are the same as step 1 in Example 1.
[0065] When preparing the foaming liquid, take 150g of the resin, add 5g of sodium dodecylbenzenesulfonate, 4g of composite curing agent (formic acid: hexamethylenetetramine: γ-butyrolactone = 6:2.5:1.5), Pentane 21g, add nanometer melamine phosphate 8g, stir evenly under 1000rpm, pour in the mold that can prepare.
[0066] When foaming, foam the above-mentioned foaming solution in a 2kw microwave for 2 minutes, dry at a temperature of 200°C, and dry for 30 minutes to obtain a flame-retardant melamine foam.
[0067] When impregnating, add 1.5kg of flu...
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