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Preparation method of high-absorbability resin for sanitary towels

A high-absorbency, sanitary napkin technology, applied in the field of fine chemicals, can solve the problems of poor blood absorption effect of resin, hinder blood diffusion and absorption, etc., and achieve the effects of improving curing rate, improving affinity, and improving absorption speed.

Active Publication Date: 2021-03-30
浙江卫星新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, in the process of blood absorption by the resin in the prior art, after the two are in contact, the solid components in the blood cannot enter the interior of the superabsorbent resin, and are likely to cover the surface of the resin particles, hindering the subsequent diffusion of blood to the interface and Absorption, resulting in poor absorption of resin for blood

Method used

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  • Preparation method of high-absorbability resin for sanitary towels
  • Preparation method of high-absorbability resin for sanitary towels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Add 100.00 parts of refined acrylic acid and 125.00 parts of water to the reactor, then add 86.8 parts of 48% NaOH for neutralization, then add 1.025 parts of crosslinking agent polyethylene glycol 400 diacrylate, foam stabilizer carboxymethyl fiber 1.25 parts of plain sodium, 0.2 parts of anticoagulant sodium oxalate, compressed air is introduced from the bottom of the reactor, the inner diameter of the ventilation outlet is 5mm, and the flow rate is 2.0L / min. After 10min, the temperature of the reaction solution is lowered to 80°C and the initiator: 50wt% 0.8 parts of sodium persulfate. After the polymerization reaction was completed, crushing and granulation were carried out, and 15 parts of SAP fine powder were added during granulation. After granulation, it is dried, and the dried material is crushed and screened to control the particle size of 45-300 μm, and the mass ratio is 80%. After that, the surface treatment is carried out. The surface treatment liquid is c...

Embodiment 2

[0058] Add 100.00 parts of refined acrylic acid and 103.00 parts of water to the reactor, then add 90.0 parts of 48% NaOH for neutralization, then add 0.815 parts of crosslinking agent polyethylene glycol 400 diacrylate, polyethylene glycol 1000 diacrylate 0.320 part, 0.5 part of foam stabilizer SAP fine powder, 0.32 part of anticoagulant disodium ethylenediamine tetraacetate, feed nitrogen from the bottom of the reactor, the inner diameter of the ventilation outlet is 2mm, and the flow rate is 2.0L / min. After 15min, the reaction liquid Lower the temperature and raise the temperature to 80° C. Add an initiator: 0.4 parts of 50 wt % sodium persulfate. After the polymerization reaction was completed, crushing and granulation were carried out, and 20 parts of SAP fine powder were added during granulation. Drying after granulation, the dried material is crushed and sieved to control the particle size of 45-300μm, and the mass proportion is 83%. After that, the surface treatment i...

Embodiment 3

[0060] Add 100.00 parts and 90.00 parts of refined acrylic acid to the reactor, then add 86.8 parts of 48% concentration NaOH for neutralization, then add 1.025 parts of crosslinking agent polyethylene glycol 400 diacrylate, 1.1 parts of foam stabilizer SAP fine powder, 0.31 parts of anticoagulant sodium oxalate, compressed air is introduced from the bottom of the reactor, the inner diameter of the ventilation outlet is 2 mm, and the flow rate is 2.0 L / min. After 10 minutes, the temperature of the reaction solution is lowered to 80 ° C. share. After the polymerization reaction was completed, crushing and granulation were carried out, and 15 parts of SAP fine powder were added during granulation. Drying after granulation, the dried material is crushed and sieved to control the particle size of 45-300μm, and the mass ratio is 90%. Afterwards, surface treatment is carried out. The surface treatment liquid is composed of ethylene glycol diglycidyl ether, blood affinity agent ethy...

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Abstract

The invention discloses a preparation method of high-absorbability resin for sanitary towels, belonging to the technical field of fine chemical engineering. The preparation method comprises the following steps: (1) neutralizing acrylic acid to a certain extent, and polymerizing the neutralized acrylic acid, a crosslinking agent, an initiator, a foam stabilizer and a blood anticoagulant under ventilation conditions to form a colloid; (2) adding fine powder during granulation of the polymerized colloid, and conducting drying, crushing and screening to control the particle size distribution of particles; and (3) adding assistants such as a blood anticoagulant and a blood affinity agent during surface treatment of the semi-finished product to obtain a finished product SAP. The high-absorbability resin prepared by the preparation method in the invention has the characteristics of good blood absorption performance and high absorption speed.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation method of a high-absorbency resin for sanitary napkins. Background technique [0002] Superabsorbent resin (SAP) has strong water absorption and water retention capacity, and it can absorb a hundred times or even thousands of times its own mass of water, so it is widely used in the field of sanitary products such as diapers and sanitary napkins. [0003] High-absorbent resin is comparatively general to the research of the absorbability aspect of pure water, salt water, as patent CN105061961A and CN104356281A have all introduced a kind of preparation method of salt-tolerant high-absorbent resin; Process for the preparation of absorbent superabsorbent resins. Blood is special compared to these fluids. Blood components include solids such as plasma, red blood cells, white blood cells, and platelets, which are viscous to a certain extent. When the superabsorbe...

Claims

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Application Information

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IPC IPC(8): C08J7/00C08J3/12C08F220/06C08F222/20C08F2/44
CPCC08J7/00C08J3/12C08F220/06C08F2/44C08J2333/02C08J2400/00C08F222/1063
Inventor 杨卫东刘新卢卫伟吕志平阮玉林刘健朱雅亮
Owner 浙江卫星新材料科技有限公司
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