A kind of defoamer applied to thin-layer self-leveling mortar and preparation method thereof
A defoaming agent and self-leveling technology, applied in the field of fine chemical preparations, can solve the problems of hollowing and surface cracking of thin-layer self-leveling mortar, and achieve the effect of simple preparation method, reducing the risk of oil drift, and improving foam problems.
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Embodiment 1
[0023] Get 25g 2-octyldodecanol and 4g gas-phase method hydrophilic silica (specific surface area 50 m 2 / g), stirred at 120°C for 3 hours to obtain the dispersion M1-1.
[0024] Take 15.625g terminal hydrogen silicone oil (hydrogen content 0.1%), 9.375g acetylene alcohol ether (molecular weight 600) and mix and heat, add 50ppm catalyst chloroplatinic acid isopropanol solution at a temperature of 50°C, and at a temperature of 100°C, the reaction time is After 3 hours, alkynol silicon polyether D-1 was obtained, and dispersion M1-1 and 30 g of nonylphenol polyoxyethylene ether were added, and the temperature was lowered at 80°C and kept for 1 hour to obtain M2-1.
[0025] At a temperature of 60°C, a rotational speed of 1000rpm, and a time of 30s, spray M2-1 onto 16g of fumed hydrophilic silica (specific surface area 50 m 2 / g), after mixing it is M3-1. The prepared solid defoamer can be obtained by sieving the mixture M3-1.
Embodiment 2
[0027] Get 10g myristyl alcohol and 16g precipitation method hydrophilic white carbon black (specific surface area 500m 2 / g), at a temperature of 180°C, stirred for 2 hours, which is the dispersion M1-2.
[0028] Take 4.68g side hydrogen silicone oil (hydrogen content 0.3%, molecular weight), 25.32g D2 molecular weight 1500, mix and heat, add 15ppm catalyst platinum-alcohol complex at a temperature of 80°C, and react at a temperature of 160°C for 0.5 hours to obtain For alkynol silicon polyether D-2, add dispersion M1-2, 20g polyoxyethylene laurate, lower the temperature at 100°C, and keep it warm for 0.5 hours to obtain M2-2.
[0029] At a temperature of 100°C, a rotational speed of 500rpm, and a time of 10s, spray M2-2 onto 24g of precipitated hydrophilic silica (specific surface area 500m 2 / g), after mixing it is M3-2. The prepared solid defoamer can be obtained by sieving the mixture M3-2.
Embodiment 3
[0031] Get 25g cetyl alcohol and 16g gas-phase process hydrophilic silica by mass parts (specific surface area 200m 2 / g), stirred at 160°C for 2.5 hours to obtain the dispersion M1-3.
[0032] Take 6.25g end-side hydrogen silicone oil (hydrogen content 0.2%) and 13.75g butynol ether (molecular weight 1000) and mix and heat, add 3ppm catalyst platinum-olefin complex at a temperature of 70°C, and at a temperature of 140°C, the reaction time After 2 hours, alkynyl alcohol silicon polyether D-3 was obtained, and dispersion M1-3 and 15 g of sorbitan monostearate were added, the temperature was lowered at 90° C., and the temperature was kept for 1 hour to obtain M2-3.
[0033] At a temperature of 80°C, a rotational speed of 800rpm, and a time of 20s, spray M2-3 onto 24g of fumed hydrophilic silica (specific surface area 200m 2 / g), after mixing it is M3-3. The prepared solid defoamer can be obtained by sieving the mixture M3-3.
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