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Redox polymerization method, water-absorbent resin composite, and absorbent article

A compound, water-absorbing technology, applied in the direction of absorbent pads, layered products, textiles and papermaking, etc., can solve the problems of no suggestion, reducing the amount of residual monomers, and no record of redox system manufacturing examples or examples, etc.

Inactive Publication Date: 2007-01-10
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the publication does not describe the production examples or examples of the redox system.
Therefore, there is no indication of a polymerization activator or anti-polymerization inhibitor directly involved in redox polymerization, or a residual monomer amount reducing agent for reducing the amount of residual monomer.

Method used

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  • Redox polymerization method, water-absorbent resin composite, and absorbent article
  • Redox polymerization method, water-absorbent resin composite, and absorbent article
  • Redox polymerization method, water-absorbent resin composite, and absorbent article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0485] In 100 parts by weight of high-purity acrylic acid containing 500 parts by weight of acetic acid, 400 parts by weight of propionic acid and 100 parts by weight of dimer acid, add 133.3 parts by weight of 25 parts by weight of sodium hydroxide aqueous solution, 3.3 parts by weight of distilled water, A partially neutralized acrylic acid aqueous solution having a monomer concentration of 50% by weight and a degree of neutralization of 60 mol% was prepared.

[0486] With respect to 100 parts by weight of the partially neutralized acrylic acid aqueous solution, 0.14 parts by weight of N,N'-methylenebisacrylamide as a crosslinking agent and 4.55 parts by weight of a 31% by weight aqueous hydrogen peroxide solution as an oxidizing agent were added to prepare Solution X. Iron (III) chloride hexahydrate was added to this solution X as a polymerization activator so that it was 5 weight ppm in terms of iron relative to the monomer, to prepare a solution A.

[0487] In addition, ...

Embodiment 2

[0490] Except adding iron(III) chloride hexahydrate as a polymerization activator to both solutions X and Y, and replacing 5 wtppm with respect to monomer conversion of iron, it was the same as in Example 1. to operate. The results are shown in Table 1.

Embodiment 3

[0492] Except adding iron (III) chloride hexahydrate as a polymerization activator to both solutions X and Y, and replacing 5 weight ppm with respect to monomer conversion iron, it was the same as in Example 1. to operate. The results are shown in Table 1.

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Abstract

PROBLEM TO BE SOLVED: To provide a method for easily producing an absorptive material capable of quickly absorbing and diffusing / holding a sufficient amount of a liquid. ŽSOLUTION: The method for producing a water-absorbing material comprising a water-absorbing resin and fibers comprises (A) the compounding step of mutually contacting previously opened fibers and droplets containing a polymerizable monomer and / or a polymerization-advancing material thereof giving the water-absorbing resin to further advance the polymerization of the monomer to obtain a composite of the water-absorbing resin and the fibers having such a structure that the water-absorbing resin adheres to the fibers, (B) the step of collecting the assembly of the composite, (C) the step of drying the assembly and (D) the step of forming the assembly thus dried. Ž

Description

technical field [0001] The present invention relates to a technology capable of dramatically increasing the polymerization rate of redox polymerization, thereby improving productivity. In particular, it provides a rapid polymerization method of (meth)acrylic acid suitable for producing hydrophilic resins such as water-absorbing resins, water-soluble resins, coagulants, and dispersants. In addition, the present invention relates to a water-absorbent resin composite and a method for producing the same, a water-absorbent resin composite composition containing the water-absorbent resin composite, and an absorbent article formed using the water-absorbent resin composite composition. The water-absorbent resin composite and its composition of the present invention have a low residual monomer concentration, are thin and flexible, and can be opened, and are suitable for absorbent articles such as sanitary materials such as disposable diapers and sanitary napkins, and industrial materia...

Claims

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Application Information

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IPC IPC(8): C08F4/40C08F2/44B32B5/30A61F13/53A61F5/44A61F13/15A61F13/472A61F13/49B32B5/16D04H1/407
Inventor 桧森俊一伊藤喜一须尧保成森义昭石井泰助
Owner MITSUBISHI CHEM CORP