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Preparation method of low-reverse-osmosis high-absorptivity resin

A highly absorbent, resin technology, applied in the field of adsorption resin, can solve the problems of decreased liquid absorption rate, increased dosage, and difficulty in meeting requirements, and achieves the effect of reducing reverse osmosis, large absorption, and fast absorption rate

Active Publication Date: 2020-05-01
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] Increasing the cross-linking density can reduce the amount of reverse osmosis to a certain extent. The disadvantage is that the liquid absorption rate decreases, which will reduce the liquid absorption capacity of sanitary products.
Increasing the amount of superabsorbent resin used in hygiene products can also effectively reduce the amount of reverse osmosis, but this method will inevitably increase costs
Moreover, the sanitary products industry is gradually developing towards lighter, thinner and more comfortable directions, and it is difficult to meet the requirements by increasing the dosage

Method used

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  • Preparation method of low-reverse-osmosis high-absorptivity resin

Examples

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Effect test

Embodiment 1

[0060] A method for preparing a low reverse osmosis high-absorbency resin, comprising the following steps:

[0061] a) Using acrylic acid and liquid caustic soda as raw materials to prepare a monomer solution, then respectively adding a hydrophilic cross-linking agent, a hydrophobic cross-linking agent and a phase transfer catalyst to the monomer solution, and mixing uniformly to obtain a reaction solution; the hydrophilic cross-linking agent The dosage ratio of linking agent and hydrophobic crosslinking agent is 1:1~10;

[0062] b) controlling the temperature of the reaction solution obtained in step a), and adding a redox initiator to carry out a polymerization reaction to obtain a superabsorbent resin gel;

[0063] c) granulating the superabsorbent resin gel, and adding a surfactant and caustic soda during the granulation process;

[0064] d) After the high-absorbent resin gel granulation is completed, it is dried, pulverized, screened, and surface treated in sequence to o...

Embodiment 2

[0079] A method for preparing a low reverse osmosis high-absorbency resin, comprising the following steps:

[0080] a) Using acrylic acid and liquid caustic soda as raw materials to prepare a monomer solution, then respectively adding a hydrophilic cross-linking agent, a hydrophobic cross-linking agent and a phase transfer catalyst to the monomer solution, and mixing uniformly to obtain a reaction solution; the hydrophilic cross-linking agent The dosage ratio of linking agent and hydrophobic crosslinking agent is 1:3;

[0081] b) controlling the temperature of the reaction solution obtained in step a), and adding a redox initiator to carry out a polymerization reaction to obtain a superabsorbent resin gel;

[0082] c) granulating the superabsorbent resin gel, and adding a surfactant and caustic soda during the granulation process;

[0083] d) After the high-absorbent resin gel granulation is completed, it is dried, pulverized, screened, and surface treated in sequence to obta...

Embodiment 3

[0098] A method for preparing a low reverse osmosis high-absorbency resin, comprising the following steps:

[0099] a) Using acrylic acid and liquid caustic soda as raw materials to prepare a monomer solution, then respectively adding a hydrophilic cross-linking agent, a hydrophobic cross-linking agent and a phase transfer catalyst to the monomer solution, and mixing uniformly to obtain a reaction solution; the hydrophilic cross-linking agent The dosage ratio of linking agent and hydrophobic crosslinking agent is 1:7;

[0100] b) controlling the temperature of the reaction solution obtained in step a), and adding a redox initiator to carry out a polymerization reaction to obtain a superabsorbent resin gel;

[0101] c) granulating the superabsorbent resin gel, and adding a surfactant and caustic soda during the granulation process;

[0102] d) After the high-absorbent resin gel granulation is completed, it is dried, pulverized, screened, and surface treated in sequence to obta...

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Abstract

The invention discloses a preparation method of low-reverse-osmosis high-absorptivity resin. According to the preparation method, a redox initiator is adopted in polymerization process, and a hydrophilic and hydrophobic composite crosslinking agent and a phase transfer catalyst are added; alkali is added for neutralization in the polymerization process and a granulation process respectively, and asurfactant is added in the granulation process; and a granulated gel is sequentially subjected to drying, crushing, screening and surface treatment to obtain the low-reverse-osmosis high-absorptivityresin. The reverse osmosis resistance of the prepared low-reverse-osmosis high-absorptivity resin is obviously improved, and the effect of improving the dryness and comfort of hygienic products is obvious.

Description

technical field [0001] The invention relates to the field of adsorption resins, in particular to a preparation method of a low reverse osmosis high-absorbency resin. Background technique [0002] Superabsorbent resin is a new type of functional polymer material, which can absorb water equivalent to hundreds of times its own weight. It has the characteristics of non-toxic and harmless, repeatedly absorbs water and releases water, and effectively locks water. It is widely used in hygiene, medicine, etc. , agriculture, forestry, construction, food and other fields. [0003] In recent years, with the enhancement of people's awareness of health and hygiene, the rise of sanitary product industries such as baby diapers (sheets), feminine sanitary napkins, and adult diapers (sheets) has greatly promoted the rapid development of the superabsorbent resin industry. The superabsorbent resin in the sanitary products industry generally needs to meet the following requirements: 1. Safe an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/20C08F222/14C08L33/02C08J3/12
CPCC08F220/06C08J3/12C08J2333/02
Inventor 朱雅亮洪锡全吕志平阮玉林裴小苏刘健邵东
Owner 浙江卫星新材料科技有限公司
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