Supercharge Your Innovation With Domain-Expert AI Agents!

Amino polycarboxylic acids as processing aids in the production of superabsorbents

A technology of amino polycarboxylic acid and chelating agent, applied in the direction of absorbent pads, medical science, bandages, etc., can solve the problems of increased residual monomer fraction, incorrect temperature management, insufficient conversion, etc., and achieve improved gel processability Effect

Active Publication Date: 2016-03-23
EVONIK SUPERABSORBER GMBH
View PDF45 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if the reaction proceeds too slowly (e.g. as a result of defective initiation or incorrect temperature management), there can be, for example, a significant increase in the so-called residual monomer fraction due to insufficient conversion

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
  • Amino polycarboxylic acids as processing aids in the production of superabsorbents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Embodiment 1: (use DTPA pentasodium salt as the batch of processing aid)

[0137] The chelating agent was added to an aqueous solution of 40.2% by weight diethylenetriaminetetraacetic acid sodium salt using 1.19 g ( 80EexDow) form monomer solution.

Embodiment 2a

[0138] Embodiment 2a (using EDTA tetrasodium salt = Bliquidex BASF as a processing aid)

[0139] The chelating agent was added to an aqueous solution of 42.5% by weight ethylenediaminetetraacetic acid sodium salt using 0.85 g ( in monomer solution in the form of BliquidexBASF).

Embodiment 2b

[0140] Embodiment 2b (using EDTA tetrasodium salt = Bliquidex BASF as a processing aid)

[0141] The chelating agent was added to 42.5% by weight ethylenediaminetetraacetic acid sodium salt aqueous solution ( in monomer solution in the form of BliquidexBASF).

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

Described is the production of water-absorbing polymeric particles by polymerizing a monomer solution or suspension comprising a) at least one ethylenically unsaturated acid-functional monomer which is optionally at least partly present as salt, b) at least one crosslinker and c) at least one initiator, wherein the process further comprises drying the resulting polymer and also optionally grinding the dried polymer and sieving the ground polymer and also optionally surface-postcrosslinking the dried and possibly ground and sieved polymer, and wherein the polymerization is carried out in the presence of aminopolycarboxylic acids and / or salts thereof, in particular in the presence of ethylenediaminedisuccinic acid and / or a salt thereof.

Description

technical field [0001] The present invention is in the field of superabsorbents and water-absorbing polymer particles. The present invention specifically relates to a method for producing water-absorbent polymer particles by using specified aminopolycarboxylic acids and / or salts thereof. The present invention relates to water-absorbing polymer particles, hygiene articles comprising water-absorbing polymer particles, and the use of specified aminopolycarboxylic acids and / or salts thereof as processing aids in the production of water-absorbing polymer particles. Background technique [0002] Superabsorbents are known, a term referring to crosslinked hydrophilic polymers capable of absorbing large quantities of aqueous fluids. This ability is based on the strong interaction of water with hydrophilic groups (in particular ionic groups or groups capable of forming hydrogen bonds) on the superabsorbent. Other customary names for superabsorbents include: "superabsorbent polymers"...

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): C08F290/06C08F222/14C08J3/24A61L15/24A61L15/60
CPCC08F2/04C08F2/18C08G63/83C08J2300/14B01J20/261B01J20/267B01J20/3014B01J20/3085C08F2/44C08F6/008C08L101/14C08L33/02A61L15/24A61L15/60
Inventor C·鲁瓦克I·罗伊D·加尔茨
Owner EVONIK SUPERABSORBER GMBH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com