Polymer modified bentonite and preparation process thereof

[0023] The polymer modified bentonite preparation process of the present embodiment is specifically as follows:

[0024] Step 1. Weigh 40 parts of bentonite and 4 parts of magnesia for mixing. The mixing ratio of bentonite and magnesia is 10:1. After mixing evenly, grind the mixture until the particle size is 200-250 mesh ;

[0025] Step 2. Put 2 parts of acrylic acid, 15 parts of N,N-dimethylbisacrylamide, and 2 parts of lye in a nitrogen atmosphere to react for 5 to 7 hours until the flocculation state is formed, and then dry , dried and prepared into flake resin for later use;

[0026] Step 3, preparing polyurethane polymer: 27 parts of water-based polyurethane emulsion, 9 parts of isocyanate, and 9 parts of polyol are mixed, mixed into a high-temperature emulsion, and subjected to vacuum distillation to obtain polyurethane polymer;

[0027] Step 4: Stir 7 parts of the lubricant, the flake resin in step 2, and the polyurethane polymer in step 3, heat up to 70±5°C, treat a...

[0029] The polymer modified bentonite preparation process of the present embodiment is specifically as follows:

[0030] Step 1. Weigh 40 parts of bentonite and 4 parts of magnesia for mixing. The mixing ratio of bentonite and magnesia is 10:1. After mixing evenly, grind the mixture until the particle size is 200-250 mesh ;

[0031] Step 2. Put 1 part of acrylic acid, 10 parts of N,N-dimethylbisacrylamide, and 1 part of lye in a nitrogen atmosphere to react for 5-7 hours until the flocculation state is formed, and then dry , dried and prepared into flake resin for later use;

[0032] Step 3, preparing polyurethane polymer: mixing 20 parts of water-based polyurethane emulsion, 5 parts of isocyanate, and 5 parts of polyol, mixing into a high-temperature emulsion, and distilling under reduced pressure to obtain polyurethane polymer;

[0033] Step 4: Stir 5 parts of the lubricant, the flake resin in step 2, and the polyurethane polymer in step 3, heat up to 70±5°C, treat at a co...

[0035] The polymer modified bentonite preparation process of the present embodiment is specifically as follows:

[0036] Step 1. Weigh 60 parts of bentonite and 6 parts of magnesia for mixing. The mixing ratio of bentonite and magnesia is 10:1. After mixing evenly, grind the mixture until the particle size is 200-250 mesh ;

[0037] Step 2. Put 3 parts of acrylic acid, 16 parts of N,N-dimethylbisacrylamide, and 2 parts of lye in a nitrogen atmosphere to react for 5 to 7 hours until the flocculation state is formed, and then dry , dried and prepared into flake resin for later use;

[0038] Step 3, preparing polyurethane polymer: mixing 30 parts of water-based polyurethane emulsion, 10 parts of isocyanate, and 10 parts of polyol, mixing into a high-temperature emulsion, and distilling under reduced pressure to obtain polyurethane polymer;

[0039] Step 4: Stir 9 parts of the lubricant, the flake resin in step 2, and the polyurethane polymer in step 3, heat up to 70±5°C, treat ...