Preparation method of water-resistant gypsum emulsion

[0021] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0022] 80 parts of gypsum;

[0023] 20 parts of silica fume;

[0024] 16 parts of borax

[0025] 5 parts of aluminum oxide;

[0026] 4 parts activated carbon;

[0027] 20 parts of cement;

[0028] 28 parts of stearic acid emulsion;

[0029] 3 parts of hydroxypropyl methylcellulose;

[0030] 5 parts polyacrylamide.

[0031] The solid content of the stearic acid emulsion is 25%.

[0032] The molecular weight of the polyacrylamide is 8 million.

[0033] The method comprises the steps of:

[0034] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix at a speed of 300r / min for 2 hours to obtain emulsion system A;

[0035] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of stirr

[0039] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0040] 70 parts of gypsum;

[0041] 15 parts of silica fume;

[0042] 12 parts borax

[0043] 4 parts of aluminum oxide;

[0044] 3 parts activated carbon;

[0045] 12 parts of cement;

[0046] 22 parts of stearic acid emulsion;

[0047] 2 parts of hydroxypropyl methylcellulose;

[0048] 3 parts polyacrylamide.

[0049] The solid content of the stearic acid emulsion is 20%.

[0050] The molecular weight of the polyacrylamide is 7 million.

[0051] The method comprises the steps of:

[0052] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix for 3 hours at a speed of 200r / min to obtain emulsion system A;

[0053] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of stirring

[0057] A kind of preparation method of water-resistant gypsum emulsion of the present embodiment, raw material comprises the component of following parts by weight:

[0058] 90 parts of gypsum;

[0059] 25 parts of silica fume;

[0060] Borax 18 parts

[0061] 6 parts of aluminum oxide;

[0062] 5 parts of activated carbon;

[0063] 24 parts of cement;

[0064] 32 parts of stearic acid emulsion;

[0065] 4 parts of hydroxypropyl methylcellulose;

[0066] 8 parts of polyacrylamide.

[0067] The solid content of the stearic acid emulsion is 30%.

[0068] The molecular weight of the polyacrylamide is 10 million.

[0069] The method comprises the steps of:

[0070] Step 1. Mix gypsum, silica fume, borax, activated carbon, cement and stearic acid emulsion, and stir and mix at a speed of 400r / min for 1 hour to obtain emulsion system A;

[0071] Step 2. Add aluminum oxide and hydroxypropyl methylcellulose to the emulsion system A described in step 1 under the condition of st