Modified redispersible emulsion powder
A redispersed latex powder and modification technology, applied in the field of additives in the construction field, can solve the problems of low water resistance strength, influence of water resistance bonding performance, etc., and achieve the effect of good water resistance strength, good bonding strength, and increased water resistance strength.
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[0017] Example 1
[0018] 1. Formula of modified redispersible latex powder (weight ratio):
[0019] EVA latex powder 50%
[0020] Tributyl citrate 20%
[0021] Silane coupling agent 0.5%
[0022] Titanate coupling agent 1.0%
[0023] Diatomite (720 mesh) 28%
[0024] Sodium hexametaphosphate 0.5%
[0025] 2. Preparation
[0026] (1) According to the above formula, pour the silane coupling agent and titanate coupling agent into the tributyl citrate solution, stir at 100 revolutions / min for 5 minutes, and then add sodium hexametaphosphate to the above solution. Continue to stir for 5 minutes;
[0027] (2) Add EVA latex powder to the mixed solution of step (1), and stir at 650 rpm for 10 minutes;
[0028] (3) Add diatomaceous earth to a horizontal mixer, stir slowly at 45 rpm, and use a high-pressure spray device (pressure 0.3MPa) to uniformly spray the mixture of step (2) into the mixer, and stir for 15 minutes to obtain Modified redispersible latex powder.
[0029] 3. Application and perform...
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[0040] Example 2
[0041] 1. Formula of modified redispersible latex powder (weight ratio):
[0042] Acrylic rubber powder 40%
[0043] Epoxidized soybean oil 30%
[0044] Silane coupling agent 0.6%
[0045] Titanate coupling agent 1.2%
[0046] Fumed silica (220 mesh) 12.6%
[0047] Diatomite (750 mesh) 15%
[0048] Polyacrylate sodium salt 0.6%
[0049] 2. Preparation
[0050] (1) According to the above formula, pour the silane coupling agent and titanate coupling agent into the epoxy soybean oil solution, stir at 200 rpm for 5 minutes, and then add glyceryl tristearate to the above solution , Continue to stir for 5 min;
[0051] (2) Add acrylic rubber powder to the mixed solution of step (1), and stir at 850 revolutions / min for 10 minutes;
[0052] (3) Add fumed silica and metakaolin to a horizontal mixer, stir slowly at 60 rpm, and use high-pressure spray equipment (pressure 0.4MPa) to evenly spray the mixture of step (2) into the mixer, Stir for 15 minutes to obtain modified redispersib...
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