Defoaming agent applied to thin-layer self-leveling mortar and preparation method of defoaming agent

Abstract

The invention provides a defoaming agent applied to thin-layer self-leveling mortar and a preparation method of the defoaming agent. The defoaming agent comprises the components: white carbon black, polyether, fatty alcohol and alkynol silicon polyether. The preparation method comprises the steps: (1) firstly, mixing and stirring fatty alcohol and part of white carbon black to form a dispersoid M1; (2) preparing alkynol silicon polyether, then adding the dispersoid M1 and polyether, and mixing to obtain a dispersoid M2; and (3) slowly spraying the dispersoid M2 onto A2 through a metering pumpunder certain temperature and rotating speed conditions, and mixing to obtain M3; and finally, screening the M3 to obtain the solid defoaming agent. The solid defoamer prepared by the method is specially used for solving the problems of surface cracking and hollowing of thin-layer self-leveling mortar, and compared with a traditional defoaming agent, the defoaming agent disclosed by the inventionhas the advantages of simple preparation method, good defoaming and foam inhibition performances, no influence on the stability of a self-leveling mortar system and capability of remarkably improvingthe surface performance of the self-leveling mortar.

Description

Technical field

[0001] The present invention relates to a defoamer in the field of mortar and a preparation method thereof. The defoamer belongs to fine chemical preparations, so the present invention belongs to the technical field of fine chemical preparations. Background technique

[0002] Self-leveling mortar is mainly divided into thick layer and thin layer. The construction thickness of thick layer self-leveling cement mortar is between 5mm-50mm. It is composed of cementing materials such as ordinary silica cement, aluminate cement, sulfoaluminate cement or gypsum, fine aggregates, fillers and additives. After mixing with water, it has fluidity, and can be leveled automatically or with a little paving. High efficiency, good strength and good flatness. The construction thickness of thin self-leveling cement mortar is less than 5mm, which requires higher surface flatness than thick layers, does not rely on manual scraping, and is relatively small in thickness. Due to the hea...

Examples

Embodiment 1

[0023] Take 25g 2-octyldodecanol and 4g vapor phase hydrophilic silica (specific surface area 50 m 2 / g), stirring at 120°C for 3 hours, it is dispersion M1-1.

[0024] Take 15.625g hydrogen-terminated silicone oil (0.1% hydrogen content), 9.375g acetylene alcohol ether (molecular weight 600), mix and heat, add 50ppm catalyst chloroplatinic acid isopropanol solution at a temperature of 50℃, and the reaction time is at 100℃ After 3 hours, the acetylene alcohol silicon polyether D-1 is obtained, and the dispersion M1-1 is added, 30 g of nonylphenol polyoxyethylene ether, the temperature is lowered at 80° C., and the temperature is kept for 1 hour, which is M2-1.

[0025] At a temperature of 60℃, a rotating speed of 1000rpm, and a time of 30s, spray M2-1 through a metering pump onto 16g of vapor-phase hydrophilic silica (specific surface area 50 m 2 / g), it becomes M3-1 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-1.

Embodiment 2

[0027] Take 10g tetradecyl alcohol and 16g precipitation method hydrophilic silica (specific surface area 500m 2 / g), stirring for 2 hours at a temperature of 180°C, it is dispersion M1-2.

[0028] Take 4.68g side hydrogen silicone oil (hydrogen content 0.3%, molecular weight), 25.32g D2 molecular weight 1500 mixed and heated, add 15ppm catalyst platinum-alcohol complex at a temperature of 80℃, and a reaction time of 0.5 hours at a temperature of 160℃ to obtain Add the dispersion M1-2, 20g lauric acid polyoxyethylene ether, and keep the temperature at 100°C for 0.5 hours to obtain M2-2.

[0029] At a temperature of 100°C, a rotation speed of 500rpm, and a time of 10s, spray M2-2 through a metering pump onto 24g of precipitation hydrophilic silica (specific surface area of ​​500m 2 / g), it becomes M3-2 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-2.

Embodiment 3

[0031] Take 25g cetyl alcohol and 16g vapor phase hydrophilic silica (specific surface area 200m 2 / g), stirring for 2.5 hours at a temperature of 160°C, it is dispersion M1-3.

[0032] Take 6.25g end-side hydrogen silicone oil (0.2% hydrogen content), 13.75g butynol ether (molecular weight 1000), mix and heat, add 3ppm catalyst platinum-olefin complex at 70℃, and react at 140℃. It is 2 hours to obtain acetylenic silicon polyether D-3, adding dispersion M1-3, 15g sorbitan monostearate, cooling at 90°C and keeping it for 1 hour, it is M2-3.

[0033] At a temperature of 80℃, a rotation speed of 800rpm, and a time of 20s, spray M2-3 through a metering pump onto 24g of vapor-phase hydrophilic silica (specific surface area 200m 2 / g), it becomes M3-3 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-3.

Technical field

[0001] The present invention relates to a defoamer in the field of mortar and a preparation method thereof. The defoamer belongs to fine chemical preparations, so the present invention belongs to the technical field of fine chemical preparations. Background technique

[0002] Self-leveling mortar is mainly divided into thick layer and thin layer. The construction thickness of thick layer self-leveling cement mortar is between 5mm-50mm. It is composed of cementing materials such as ordinary silica cement, aluminate cement, sulfoaluminate cement or gypsum, fine aggregates, fillers and additives. After mixing with water, it has fluidity, and can be leveled automatically or with a little paving. High efficiency, good strength and good flatness. The construction thickness of thin self-leveling cement mortar is less than 5mm, which requires higher surface flatness than thick layers, does not rely on manual scraping, and is relatively small in thickness. Due to the hea...

Examples

Embodiment 1

[0023] Take 25g 2-octyldodecanol and 4g vapor phase hydrophilic silica (specific surface area 50 m 2 / g), stirring at 120°C for 3 hours, it is dispersion M1-1.

[0024] Take 15.625g hydrogen-terminated silicone oil (0.1% hydrogen content), 9.375g acetylene alcohol ether (molecular weight 600), mix and heat, add 50ppm catalyst chloroplatinic acid isopropanol solution at a temperature of 50℃, and the reaction time is at 100℃ After 3 hours, the acetylene alcohol silicon polyether D-1 is obtained, and the dispersion M1-1 is added, 30 g of nonylphenol polyoxyethylene ether, the temperature is lowered at 80° C., and the temperature is kept for 1 hour, which is M2-1.

[0025] At a temperature of 60℃, a rotating speed of 1000rpm, and a time of 30s, spray M2-1 through a metering pump onto 16g of vapor-phase hydrophilic silica (specific surface area 50 m 2 / g), it becomes M3-1 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-1.

Embodiment 2

[0027] Take 10g tetradecyl alcohol and 16g precipitation method hydrophilic silica (specific surface area 500m 2 / g), stirring for 2 hours at a temperature of 180°C, it is dispersion M1-2.

[0028] Take 4.68g side hydrogen silicone oil (hydrogen content 0.3%, molecular weight), 25.32g D2 molecular weight 1500 mixed and heated, add 15ppm catalyst platinum-alcohol complex at a temperature of 80℃, and a reaction time of 0.5 hours at a temperature of 160℃ to obtain Add the dispersion M1-2, 20g lauric acid polyoxyethylene ether, and keep the temperature at 100°C for 0.5 hours to obtain M2-2.

[0029] At a temperature of 100°C, a rotation speed of 500rpm, and a time of 10s, spray M2-2 through a metering pump onto 24g of precipitation hydrophilic silica (specific surface area of ​​500m 2 / g), it becomes M3-2 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-2.

Embodiment 3

[0031] Take 25g cetyl alcohol and 16g vapor phase hydrophilic silica (specific surface area 200m 2 / g), stirring for 2.5 hours at a temperature of 160°C, it is dispersion M1-3.

[0032] Take 6.25g end-side hydrogen silicone oil (0.2% hydrogen content), 13.75g butynol ether (molecular weight 1000), mix and heat, add 3ppm catalyst platinum-olefin complex at 70℃, and react at 140℃. It is 2 hours to obtain acetylenic silicon polyether D-3, adding dispersion M1-3, 15g sorbitan monostearate, cooling at 90°C and keeping it for 1 hour, it is M2-3.

[0033] At a temperature of 80℃, a rotation speed of 800rpm, and a time of 20s, spray M2-3 through a metering pump onto 24g of vapor-phase hydrophilic silica (specific surface area 200m 2 / g), it becomes M3-3 after mixing. The prepared solid defoamer can be obtained by sieving the mixture M3-3.

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