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Polymer modified bentonite and preparation process thereof

A bentonite and polymer technology, applied in the field of polymer modified bentonite and its preparation, can solve problems such as poor hydration performance, limited water absorption capacity of bentonite, poor chemical compatibility, etc., to achieve increased viscosity, improved chemical compatibility, improved The effect of layer spacing

Pending Publication Date: 2021-09-24
句容康泰膨润土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of limited water absorption capacity, poor hydration performance and poor chemical compatibility of bentonite in the prior art, the invention discloses a polymer modified bentonite and a preparation process thereof. The modified bentonite can be used in polymers and modified resins Under the cross-mixing, the water absorption performance of bentonite is qualitatively improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[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...

Embodiment 2

[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...

Embodiment 3

[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 ...

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Abstract

The invention discloses polymer modified bentonite and a preparation process thereof, and belongs to the field of bentonite preparation. The polymer modified bentonite provided by the invention is prepared from the following components in parts by mass: 40 to 60 parts of bentonite; 4 to 6 parts of magnesium oxide; 20 to 30 parts of a waterborne polyurethane emulsion; 5 to 10 parts of isocyanate; 5 to 10 parts of polyol; 1 to 3 parts of acrylic acid; 10 to 16 parts of N, N-dimethyl bisacrylamide; 1 to 2 parts of alkali liquor; and 5 to 9 parts of a lubricant. After the prepared polyurethane material and the high-water-absorption material are mixed, the viscosity of bentonite can be improved, a linear flocculation mixture is formed by the polymer and the bentonite, the interlayer spacing of the bentonite is increased, and thereby the water absorption performance and the lubricating performance of the prepared modified bentonite are both qualitatively improved.

Description

technical field [0001] The invention belongs to the field of bentonite preparation, in particular to a polymer modified bentonite and a preparation process thereof. Background technique [0002] The alias of bentonite is also called bentonite, bentonite or bentonite. my country's research on bentonite has been beaten for many years. Bentonite was used as a detergent in the early days, and its wide industrial use in the later period originated from the United States. Researchers in the United States found that bentonite can swell into a paste after adding water. It is named bentonite. [0003] The main mineral component of bentonite is montmorillonite, with a content of 85-90%, so the properties of bentonite are determined by montmorillonite. Montmorillonite can be in various colors, and bentonite can be in dense block or loose soil, with a certain lubricating feeling, in the form of suspension in water, and in the form of paste when there is little water. [0004] In indus...

Claims

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Application Information

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IPC IPC(8): C08K3/34C08K3/22C08L75/04C08L35/00C08K9/04
CPCC08K3/346C08K3/22C08L75/04C08L35/00C08K9/08C08K2003/222
Inventor 王为奎张学钢潘玉谈龙玉
Owner 句容康泰膨润土有限公司
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