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Preparation method of high-strength anti-aging sodium polyacrylate water-absorbing resin

A technology of sodium polyacrylate and water-absorbent resin, which is applied in the field of preparation of high-strength and aging-resistant sodium polyacrylate water-absorbent resin, can solve the problems that the strength of water-absorbent resin is not ideal, affect product efficacy, molecular chain breakage, etc., and achieve excellent water retention, improve Strength and aging resistance, the effect of not easy to agglomerate

Active Publication Date: 2018-12-18
深圳市新拓普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although ultra-high molecular weight sodium polyacrylate is extremely water-absorbent, when it is used as a water-absorbent resin, there are also some shortcomings: for example, the strength of sodium polyacrylate water-absorbent resin itself is not ideal, and when it is exposed to high temperature, strong light, and high salt content for a long time In harsh environments, its molecular chains are prone to breakage, and its molecular weight is reduced, resulting in a further decrease in its strength, which ultimately affects the efficacy of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of high-strength aging-resistant sodium polyacrylate water-absorbing resin, the steps are as follows:

[0040] A) Preparation of organically modified vermiculite powder:

[0041] Add 10 parts of lactose and 10 parts of dodecyldimethylbenzyl ammonium chloride to 100 parts of water, heat to 65°C for 5 hours, wash the product with ethanol after vacuum distillation, and dry to obtain modified lactose ,spare.

[0042] Calcinate the vermiculite at 550°C for 3 hours, then grind it into vermiculite powder; prepare 100 parts of vermiculite powder with water into a 4wt% suspension, heat it to 60°C, add 50 parts of modified lactose to the suspension, stir and keep it warm for 14 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0043] B) Neutralization: 90 parts of acrylic acid and 10 parts of acrylamide were added to 200 parts of water, and then neutralized with 8 wt% sodium hydroxide aqueous solution unt...

Embodiment 2

[0047] A preparation method of high-strength aging-resistant sodium polyacrylate water-absorbing resin, the steps are as follows:

[0048] A) Preparation of organically modified vermiculite powder:

[0049] Add 10 parts of lactose and 10 parts of dodecyldimethylbenzyl ammonium chloride to 100 parts of water, heat to 65°C for 5 hours, wash the product with ethanol after vacuum distillation, and dry to obtain modified lactose ,spare.

[0050] Calcinate the vermiculite at 550°C for 3 hours, then grind it into vermiculite powder; prepare 100 parts of vermiculite powder with water into a 4wt% suspension, heat it to 60°C, add 50 parts of modified lactose to the suspension, stir and keep it warm for 14 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0051] B) Neutralization: 90 parts of acrylic acid and 10 parts of acrylamide were added to 200 parts of water, and then neutralized with 8 wt% sodium hydroxide aqueous solution unt...

Embodiment 3

[0058] A preparation method of high-strength aging-resistant sodium polyacrylate water-absorbing resin, the steps are as follows:

[0059] A) Preparation of organically modified vermiculite powder: Add 8-parts of lactose and 8 parts of dodecyldimethylbenzyl ammonium chloride to 90 parts of water, heat to 60°C for 6 hours, and distill the product under reduced pressure Wash with ethanol, dry to obtain modified lactose, and set aside.

[0060] Calcinate the vermiculite at 500°C for 4 hours, and then grind it into vermiculite powder; prepare 90 parts of vermiculite powder with water to form a 3wt% suspension, heat it to 55°C, add 40 parts of modified lactose to the suspension, stir and keep it warm for 10 hours , and then centrifuged, filtered, and dried to obtain organically modified vermiculite powder.

[0061] B) Neutralization: 85 parts of acrylic acid and 15 parts of acrylamide were added to 150 parts of water, and then neutralized with 5 wt% sodium hydroxide aqueous soluti...

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Abstract

The invention relates to the field of synthesis of polymer materials and discloses a preparation method of high-strength anti-aging sodium polyacrylate water-absorbing resin. The preparation method comprises: A) preparation of organically modified vermiculite powder: adding lactose and dodecyl dimethyl benzyl ammonium chloride into water, carrying out heating for a reaction, carrying out reduced pressure distillation, cleaning the product, drying the product to obtain modified lactose, calcining and grinding vermiculite, preparing a suspension liquid, heating the suspension liquid, adding themodified lactose into the suspension liquid, carrying out stirring for a heat preservation reaction, and carrying out centrifugation, filtration and drying, B) neutralization: adding acrylic acid andacrylamide into water and then neutralizing the solution with sodium hydroxide until the pH is 5-5.5, C) polymerization: adding organically modified vermiculite and bacterial cellulose, adding triallyl ammonium chloride and an initiator and carrying out a reaction process to obtain a viscous liquid, and D) drying and pulverization for forming a sodium polyacrylate water-absorbent resin. The sodiumpolyacrylate resin contains organically modified vermiculite powder so that the strength and aging resistance of the resin are effectively improved.

Description

technical field [0001] The invention relates to the field of polymer material synthesis, in particular to a preparation method of high-strength anti-aging sodium polyacrylate water-absorbing resin. Background technique [0002] Sodium polyacrylate is a kind of hydrophilic polymer material. The solid product is white (or light yellow) block or powder, and the liquid product is colorless (or light yellow) viscous liquid. Soluble in cold water, warm water, glycerin, propylene glycol and other media. [0003] According to the size of sodium polyacrylate, it can be used in different fields. For low molecular weight sodium polyacrylate with molecular weight in the range of 1000-5000, it is mainly used as a dispersant. For medium molecular weight sodium polyacrylate with molecular weight in the range of 1W-100W Sodium acrylate, which is mainly used as a thickener, for high-molecular-weight sodium polyacrylate with a molecular weight above 100W, it is almost insoluble in water and ...

Claims

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Application Information

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IPC IPC(8): C08L33/02C08L1/02C08K9/00C08K9/04C08K3/34C08F220/06C08F4/02C08G69/10
CPCC08F4/027C08F220/06C08G69/10C08K3/346C08K9/00C08K9/04C08L39/00C08L2205/04C08L1/02C08F220/56C08F226/02
Inventor 吴晓薇
Owner 深圳市新拓普新材料有限公司
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