Water-based cable fireproof coating and preparation method thereof
A fireproof coating and cable technology, applied in the field of coatings, can solve the problems of hard and brittle carbonized layer, and achieve the effects of strong adhesion, prolonging the fireproof time, and convenient construction
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Embodiment 1
[0050] This example provides a method for preparing a water-based cable fire retardant coating, including the following steps:
[0051] S1: Pour the emulsion, additives and water into the reaction kettle, and stir for the first time at the first stirring speed after heating up;
[0052] S2: Add the flame retardant system and the filler into the reactor, and perform the second stirring at the second stirring speed;
[0053] S3: Grinding the product of step S2 to obtain the water-based fireproof coating for cables.
[0054] Wherein, the temperature for heating is 60-80°C. The first stirring speed is 100-200 rpm. The time for the first stirring is 60-80 minutes. The second stirring speed is 400-500 rpm. The time for the second stirring is 40-60 minutes. Grinding treatment can be performed by a three-roll machine.
Embodiment 2
[0056] In this example, the preparation method of Example 1 was used to prepare a water-based cable fireproof coating and a comparative coating, and the formulations are shown in Table 1.
[0057] Table 1
[0058]
[0059]
[0060] The water-based cable fireproof coating of formula 1 and the coating of the comparative formula were tested, and the results are shown in Table 2.
[0061] Table 2
[0062]
[0063] As can be seen from Table 2, the influence of the emulsion on the film-forming continuity, when the content of the emulsion is lower than the ratio defined in the present invention, the film-forming is discontinuous and the bending resistance is poor.
[0064] Example 2
[0065] In this example, the preparation method of Example 1 was used to prepare a water-based cable fireproof coating and a comparative coating, and the formulations are shown in Table 3.
[0066] table 3
[0067]
[0068] The water-based cable fire retardant coating of formula 2 and the c...
Embodiment 3
[0073] In this example, the preparation method of Example 1 was used to prepare a water-based cable fireproof coating and a comparative coating, and the formulations are shown in Table 5.
[0074] table 5
[0075]
[0076] The water-based cable fire retardant coating of formula 3 and the coating of the comparative formula were tested, and the results are shown in Table 6.
[0077] Table 6
[0078]
[0079] It can be seen from Table 6 that the adjustment of the proportions of the three components of the flame retardant system has an effect on the carbonized layer. The amount of ammonium polyphosphate (n>1000) and melamine affects the expansion ratio, and the carbonization agent pentaerythritol finally forms a carbonized layer. When there is too little pentaerythritol, too much ammonium polyphosphate and melamine, the carbonized layer composed of activated carbon is too little, and the foaming and expansion are serious, resulting in the carbonized layer being not continu...
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