A kind of water-absorbent resin used in wet method for manufacturing absorbent paper and its preparation method

A technology of water-absorbent resin and water-absorbent paper, which is applied in papermaking, paper machines, textiles, and papermaking, etc., and can solve the problems of performance degradation of polymer water-absorbent resin, water retention rate of polymer water-absorbent resin, and reduction of liquid-permeable absorption performance.

Active Publication Date: 2020-10-30
诺宸股份有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong hydrophilicity of ordinary superabsorbent resin, it will absorb a large amount of liquid in the process of mixing with pulp when it is applied to wet papermaking. After drying, the performance of polymer water absorbent resin (SAP) will decline seriously. When the superabsorbent resin is used in the preparation process of wet-process absorbent paper, there will be serious problems such as the water retention rate and liquid-through capacity of the polymer water-absorbent resin after wet processing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of water-absorbent resin used in wet method for manufacturing absorbent paper and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] In a first aspect, the present invention provides a method for preparing a water-absorbent resin for wet-process manufacturing of water-absorbent paper, the method comprising the following steps: (1) mixing acrylic acid, water, a cross-linking agent and hydrophobic silica Nitrogen deoxygenation (such as nitrogen deoxygenation so that the oxygen content is within 1ppm), then add an initiator to initiate the polymerization reaction, and then heat preservation treatment to obtain the polymer colloid; (2) Granulate the polymer colloid obtained in step (1), Obtain resin particles; (3) Neutralize the resin particles obtained in step (2) with an alkaline solution, then spray the first surface treatment liquid (surface treatment liquid ①) for the first surface treatment, and then dry and crush in sequence to obtain water-absorbent resin particles; (4) spraying a second surface treatment liquid (surface treatment liquid ②) on the surface of the water-absorbent resin particles obt...

Embodiment 1

[0052] Example 1: The raw materials for preparing the superabsorbent resin for wet papermaking according to the present invention are: in parts by weight, 100 parts by weight of acrylic acid, 700 parts of deionized water, 2 parts of hydrophobic silica, and 3 parts of trimethylolpropane Acrylic ester 3, tetraallyloxyethane 2.5, potassium persulfate 0.4, sodium bisulfite 0.6, 48wt% sodium hydroxide solution 104, 70wt% glycerol solution 29, polyglycerol polyglycidyl ether 5, 40wt % (total mass fraction of aluminum sulfate and sodium sulfate) aluminum sulfate sodium sulfate solution 5.5 (aluminum sulfate: sodium sulfate = 2:1), coating agent 5, liquid silicon dioxide 1.2; the coating agent is self-made by the present invention The amphiphilic oligomer coating agent, its preparation process is: 10 weight parts of acrylic acid and 20 weight parts of ethylene are put into the reaction kettle under the pressurized condition that pressure is 3MPa, add 0.5 weight part of azobisisobutyron...

Embodiment 2

[0054] Example 2: The raw materials for preparing the superabsorbent resin for wet papermaking according to the present invention are: in parts by weight, 200 parts by weight of acrylic acid, 600 parts of deionized water, 4 parts of hydrophobic silica, and three parts of trimethylolpropane Acrylic ester 5.5, potassium persulfate 0.7, ascorbic acid 1.3, 48wt% sodium hydroxide solution 196, 70wt% glycerin solution 48, polyglycerol polyglycidyl ether 10, 30wt% (total mass fraction of aluminum sulfate and sodium sulfate) Aluminum sulfate sodium sulfate solution 15 (aluminum sulfate: sodium sulfate=3:1), coating agent 7.5, liquid silicon dioxide 1.5; the coating agent is an amphiphilic oligomer coating agent obtained by the present invention, and its preparation process It is: put 15 parts by weight of acrylic acid and 15 parts by weight of ethylene into the reaction kettle under the pressure of 3MPa, add 0.3 parts of azobisisobutyronitrile, and heat it to 60°C under the pressure of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a water-absorbent resin for wet-processed water-absorbent paper and a preparation method thereof. The method is as follows: after mixing acrylic acid, water, cross-linking agent and hydrophobic silica, nitrogen and oxygen removal are added, an initiator is added to initiate polymerization, and then heat preservation treatment is performed to obtain a polymerized colloid; the polymerized colloid is granulated to obtain resin particles; Neutralize the resin particles, spray the first surface treatment liquid for surface treatment, and then dry and crush to obtain water-absorbent resin particles; spray the second surface treatment liquid on the surface of the water-absorbent resin particles for surface treatment to obtain polymer water-absorbent resin particles ; After heating the polymer water-absorbent resin particles to 100-160° C., adding a coating agent, adding liquid silica and stirring evenly, and cooling to obtain the water-absorbent resin. The water-absorbent resin of the present invention can delay the absorption of water at the initial stage during the compounding process with the pulp, thereby ensuring the sufficient mixing of the water-absorbent resin and the pulp, and is very suitable for wet-process manufacturing of water-absorbent paper.

Description

technical field [0001] The invention relates to the field of polymerized functional polymer chemical additives, in particular to a water-absorbing resin used for wet-process production of water-absorbing paper and a preparation method thereof. Background technique [0002] Superabsorbent resin is widely used in the preparation of absorbent paper because of its good water absorption and water retention capacity. At present, the production method of absorbent paper on the market is the dry composite method, that is, spray glue on the surface of the wood pulp layer and then disperse the superabsorbent resin. To the surface of the wood pulp paper layer, the production method of absorbent paper has lower requirements on the performance of superabsorbent resin, but there are many hidden dangers, such as uneven distribution of polymer absorbent resin, and high shedding of diapers or sanitary napkins is often found. Molecular water-absorbing resin affects water absorption, etc. For ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L33/02C08K3/36C08F220/06C08F222/14C08F216/20
CPCC08F220/06C08F210/02D21H21/14D21H27/002D21H19/20C08J3/128C08J3/126D21F11/00D21H11/12D21H11/00C08J2333/02C08K3/36C08F222/103C08F216/20
Inventor 荣敏杰许永升王小红于庆华荣帅帅
Owner 诺宸股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap