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Manganese dioxide and curable composition containing same

A manganese dioxide and composition technology, which is applied in the field of hardeners for liquid polysulfide polymers, can solve the problems of reduced performance of hardened products, and achieve the effects of reducing swelling and strength.

Inactive Publication Date: 2015-01-14
TOKAN MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the proper compound ratio is not maintained, the hardened product significantly reduces its performance

Method used

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  • Manganese dioxide and curable composition containing same
  • Manganese dioxide and curable composition containing same
  • Manganese dioxide and curable composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0082] The present invention will be explained in detail with reference to the following examples. Unless otherwise stated, "parts" given hereinafter are "parts by weight" of the weight standard.

[0083] In order to identify the crystal structure and calculate the interlayer distance of manganese dioxide, powder X-ray diffraction (X'Pert PRO MRD produced by Spectris Co., Ltd.) was performed, thereby obtaining an X-ray diffraction chart. The crystal structure was identified by comparison with a standard diffraction peak chart, and the interlayer spacing was calculated based on the assumption that the interplanar spacing of the peak reflected at index 001 corresponds to that of the birnessite structure.

[0084] To calculate the chemical composition ratio, quantitative determination was performed by the Na atomic absorption method, the oxidation-reduction titration method for Mn, and the ICP emission spectrochemical analysis (ICP-AES) method for other metals. The chemical anal...

Synthetic example 2

[0091]400 parts of the filtered product (1) similar to that obtained in Synthesis Example 1 was added to a previously prepared aqueous solution of 441 parts of calcium chloride dihydrate and 3000 parts of distilled water, and stirred for 24 hours. Next, the obtained suspension was filtered and washed with water until the conductivity of the filtrate became 100 microSiemens (μS / cm). Then, the filtered product was collected, dried at 80° C. for 10.5 hours, and then ground in a mortar to obtain a sample of Synthesis Example 2.

[0092] figure 2 The X-ray diffraction pattern of the sample obtained in Synthesis Example 2 is shown in (a). For comparison, figure 2 (b) shows the standard monoclinic sodium birnessite Na 0.55 mn 2 o 4 ?1.5H 2 X-ray diffraction pattern of O, and figure 2 (c) shows orthorhombic sodium birnessite Na 4 mn 14 o 27 ?9H 2 Standard X-ray diffraction pattern of O. figure 2 (a) Analysis with figure 1 (a) Similar. Analysis showed that the sample ...

Synthetic example 14

[0116] 400 parts of the filtered product (1) similar to that obtained in Synthesis Example 1 was added to a previously prepared aqueous solution consisting of 799.9 parts of strontium chloride hexahydrate and 3000 parts of distilled water, and stirred for 24 hours. Next, the obtained suspension was filtered and washed with water until the conductivity of the filtrate became 100 microSiemens (μS / cm). The filtered product was then collected, dried at 80° C. for 10.5 hours, and then ground in a mortar to obtain a sample. This sample was evaluated similarly to Synthesis Example 1. The interlayer spacing and chemical composition ratio are shown in Table 1. From these findings, Synthesis Example 14 is monoclinic birnessite containing 0.01% by weight of sodium with interlayer-introduced strontium ions.

[0117] [Synthesis Example 15]

[0118] 400 parts of the filtered product (1) similar to that obtained in Synthesis Example 1 was added to a previously prepared aqueous solution c...

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Abstract

Provided are: manganese dioxide which can cure a liquid polysulfide polymer and enables the production of a cured article that is rarely swollen or rarely undergoes the deterioration in strength even when immersed in warm water for a long period; and a curable composition containing the manganese dioxide. The manganese dioxide can be used as a curing agent for a liquid polysulfide polymer, and is characterized by comprising monoclinic cation-substituted birnessite-type manganese dioxide produced by substituting each of sodium ions existing between layers of monoclinic sodium birnessite represented by the formula: Na0.55Mn2O4·1.5H2O by a monovalent to trivalent cation.

Description

technical field [0001] The present invention relates to manganese dioxide and hardenable compositions thereof, preferably for use as hardeners for liquid polysulfide polymers. Background technique [0002] Manganese dioxide activated by alkali treatment is used as an oxidizing agent for liquid polysulfide polymers. For example, natural manganese dioxide ore treated with alkali and manganese dioxide having a birnessite structure as described in Patent Document 1 and the like are used for manganese dioxide, and they are generally processed into a paste dispersed in a plasticizer hardener. [0003] A rubbery hardened product obtained by hardening a liquid polysulfide polymer with a hardener containing manganese dioxide contains sulfur in the molecular main chain. The product does not contain any double bonds and therefore has excellent oil resistance, weather resistance, water tightness, and air tightness, and also has good adhesiveness. For this reason, hardened products ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/00C09D181/04C09J181/04C09K3/10
CPCC09J181/04C09K3/1012C01P2002/72C01G45/1242C01P2002/76C09K2200/0239C09D181/04C01G49/0072C01G53/54C01P2002/78
Inventor 滨田幸人松本一宪越后屋好奇元田达朗下村弘柴田弘毅
Owner TOKAN MATERIAL TECH
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