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Agglomerated superabsorbent polymer particles comprising clay platelets with edge modification and/or surface modification

A technology of superabsorbent polymers and particles, applied in the direction of absorbent pads, silicon compounds, alkali metal compounds, etc., can solve the problem of incomplete control of particle size

Pending Publication Date: 2019-11-26
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the particles obtained by such grinding or chopping cannot be fully controlled

Method used

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  • Agglomerated superabsorbent polymer particles comprising clay platelets with edge modification and/or surface modification
  • Agglomerated superabsorbent polymer particles comprising clay platelets with edge modification and/or surface modification
  • Agglomerated superabsorbent polymer particles comprising clay platelets with edge modification and/or surface modification

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preparation example Construction

[0114]The preparation of useful polymerizable monomers and / or oligomers is described in DE-A 199 41 423, EP-A 686 650, WO 01 / 45758 and WO 03 / 14300.

[0115] The polymerizable monomers and / or oligomers may be used in the solution in amounts of at least 1% to 90% by weight, preferably 10% to 60% by weight.

[0116] In addition to the polymerizable monomers and / or oligomers, the solution may contain one or more polymerizable ethylenically and / or allylic unsaturated monomers copolymerizable with the polymerizable monomers and / or oligomers. monomers, ready to polymerize ethylenically unsaturated acid-functional monomers. Examples of copolymerizable ethylenically unsaturated monomers are acrylamide, methacrylamide, crotonamide, dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminopropyl acrylate, diethyl acrylate Aminopropyl, Dimethylaminobutyl Acrylate, Dimethylaminoethyl Methacrylate, Diethylaminoethyl Methacrylate, Dimethylamino Neopentyl Acrylate, and Dime...

Embodiment

[0353] The following are non-limiting examples of agglomerated superabsorbent polymer particles of the present invention. The examples are given for the purpose of illustration only and are not to be construed as limitations of the invention, since many variations thereof are possible without departing from the spirit and scope of the invention, which will be described herein. recognized by those of ordinary skill in the art.

[0354] Preparation of deionized water (>5 MΩcm at 25 °C) and ice made from deionized water

[0355] Quality check: Melt a sample of about 100 g of ice in a beaker (eg, 250 ml glass beaker from VWR, LENZ07001049) and measure conductivity (eg, via: COND 70 instrument without battery, #50010522, Equipped with Cell VPT51-01 C=0.1 from xs instruments; or LF 320 / Set, #300243 equipped with TetraCon 325 from WTW). Conductivity must be less than 1.6 μS / cm at 0°C.

[0356] Preparation of a suspension of clay platelets (montmorillonite) in deionized water (...

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Abstract

Agglomerated superabsorbent polymer particles is provided and obtained by a method comprising the steps of: a) providing precursor superabsorbent polymer particles having a first mass average particlesize 1mAvPS, and b) mixing the precursor superabsorbent polymer particles with a solution comprising i) homogeneously dispersed therein, clay platelets with opposing basal platelet surfaces and platelet edges; ii) one or more surface modification compound(s) and / or edge modification compound(s); and, iii) polymerizable monomers and / or oligomers, or iv) crosslinkable polymers, c) polymerizing themixed solution if the solution comprises polymerizable monomers and / or oligomers or crosslinking the mixed solution if the solution comprises crosslinkable polymers. The agglomerated superabsorbent polymer particles have a second mass average particle size 2mAvPS which is at least 25% greater than the first mass average particle size 1mAvPS.

Description

technical field [0001] The present invention relates to agglomerated superabsorbent polymer particles formed by using clay platelets with edge and / or surface modifications, and to absorbent articles comprising agglomerated superabsorbent polymer particles obtained via the process herein. Background technique [0002] The use of superabsorbent polymer particles, especially in absorbent articles, is well known in the art. Superabsorbent polymer particles are generally prepared by grinding or otherwise shredding relatively large pieces of superabsorbent polymer. However, the size of the particles obtained by such grinding or chopping cannot be fully controlled. Consequently, the obtained superabsorbent polymer particles usually have a specific particle size distribution such that there are particles of relatively large size (e.g. 1000 μm or even larger) and other particles are rather small, such as less than 100 μm or even significantly smaller, with the majority of particle s...

Claims

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Application Information

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IPC IPC(8): B01J20/26A61L15/60B01J20/16B01J20/12B01J20/28B01J20/30
CPCA61L15/60B01J20/12B01J20/26B01J20/264B01J20/267B01J20/2803B01J20/3028
Inventor J.坎波斯A.西蒙扬
Owner THE PROCTER & GAMBLE COMPANY
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