Method for preparing water-absorbing acrylic resin

An acrylic resin and water-absorbent technology, which is applied in the preparation of water-absorbent acrylic resin and the field of water-absorbent resin preparation, can solve the problems of high equipment requirements, high reaction temperature, and long drying time, and achieve good appearance, simple operation process, The effect of lowering the reaction temperature

Active Publication Date: 2009-09-16
浙江卫星新材料科技有限公司
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are many deficiencies in the preparation of acrylic resin by the above method, which are manifested in: discontinuous polymerization, high reaction temperature, poor whiteness and long drying time, etc.
However, foreign production methods have high requirements for equipment and high investment.

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
  • Method for preparing water-absorbing acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0080] a) Add 500g of high-purity acrylic acid (in line with GBT17529.1-2008) and 180g of deionized water into a 2L kneader (Hangzhou Fuxiangtai Machinery Manufacturing Co., Ltd.), and then add 32wt% ionic membrane sodium hydroxide (Jiaxing Chemical Plant ) 650g, slowly added in the above-mentioned acrylic acid solution.

[0081] b) Add 2 g of sodium lauryl sulfate and 1 g of N, N'-methylenebisacrylamide into the above solution, and then pass nitrogen gas for 30 minutes, and the temperature of the aqueous monomer solution is 40° C. at this time.

[0082] c) adding a polymerization initiator, that is, 15 g each of a 10 wt % ammonium persulfate solution and a 10 wt % sodium bisulfite solution.

[0083] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0084] e) Cut it into small particles with scissors, then put it into a meat grinder, add 10g fine powder of 100-150 mesh and 20g 10% sodium lauryl sulfate solution. Made into particles of about 6mm.

[008...

example 2

[0089] a) Add 500g of high-purity acrylic acid (according to GBT17529.1-2008) and 180g of deionized water into the kneader, and then slowly add 660g of 32wt% ionic membrane caustic soda into the above-mentioned acrylic acid solution.

[0090] b) 2 g of sodium lauryl sulfate and 1 g of N, N'-methylenebisacrylamide were added to the above solution, and then nitrogen gas was passed for 30 minutes. At this time, the temperature of the aqueous monomer solution was 40°C.

[0091] c) adding a polymerization initiator, that is, 15 g each of a 10 wt % ammonium persulfate solution and a 10 wt % sodium bisulfite solution.

[0092] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0093] e) cut into small particles with scissors, then put into a meat grinder, add 10g of fine powder and 20g of 10wt% sodium lauryl sulfate solution. Made into particles of about 6mm.

[0094] f) The above granules are baked in an oven at 130°C for 2 hours to obtain dry granules with a...

example 3

[0098] a) Add 500g of high-purity acrylic acid (according to GBT17529.1-2008) and 180g of deionized water into the kneader, and then slowly add 650g of 32wt% ionic membrane caustic soda to the above-mentioned acrylic acid solution.

[0099] b) Add 2 g of sodium lauryl sulfate and 1 g of ethylene glycol dimethacrylate into the above solution, and then pass nitrogen gas for 30 minutes. At this time, the temperature of the aqueous monomer solution is 70°C

[0100] c) Adding a polymerization initiator, that is, 15 g of a 10 wt % ammonium persulfate solution.

[0101] d) After reacting for 1 hour, the polymerized hydrogel was taken out.

[0102] e) cut into small particles with scissors, then put into a meat grinder, add 10g of fine powder and 20g of 10wt% sodium lauryl sulfate solution. Made into particles of about 6mm.

[0103] f) The above granules are baked in an oven at 130°C for 2 hours to obtain dry granules with a water content of 5-7 wt%.

[0104] g) After the above pa...

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 invention discloses a method for preparing water-absorbing acrylic resin, comprising the following steps: firstly, polymerizing acrylic acid monomer water solution with 60-90 mol percent of neutralization degree and polymerization reaction initiator; then adding whitening agent, cross linker and polymerization initiator into the polymerized product; drying the mixture by hot wind at the temperature between 110 and 200 DEG C, and crushing and screening the dried mixture; and after the mixture is packed and treated by the surface cross linker, heating the mixture to the temperature between 90 and 200 DEG C to carry out surface treatment, and adding inorganic salt into the mixture to form the water-absorbing acrylic resin. The water-absorbing acrylic resin has high and quick physiological-salt-absorbing ratio and good white content, and is suitable for sanitary product. The process can be continuously produced; and the product has little waste gas, powder layer and waste water.

Description

technical field [0001] The present invention relates to a preparation method of resin, in particular to a preparation method of water-absorbent resin, more specifically to a preparation method of water-absorbent acrylic resin. Background technique [0002] The superabsorbent resin has a strong water absorption capacity, which can absorb water of a hundred times or even a thousand times its own weight, and can maintain a non-flowing state after absorbing water, and will not leak under pressure. In recent years, due to the improvement of production technology and the reduction of production cost of superabsorbent resin, it has been widely used in agricultural and forestry soil water retention agents and sanitary products such as diapers, adult incontinence products and women's hygiene products. With the rapid development of China's economy, the demand for superabsorbent resin is increasing, especially the demand for high-quality superabsorbent resin for sanitary products. [...

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 Applications(China)
IPC IPC(8): C08F20/06C08J3/12C08J3/00
Inventor 杨玉英金丰富阮玉林王成
Owner 浙江卫星新材料科技有限公司
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