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Method to improve visibility of contents, vinyl chloride-based resin composition, stabilizer, vinyl chloride-based resin molded body, medical material, and sterilization processing method

A technology for vinyl chloride resins and medical materials, applied in the field of medical materials for the visibility of contents, can solve problems such as decline, inability to obtain results, and difficulty in suppressing transparency.

Inactive Publication Date: 2020-07-03
NEW JAPAN CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, as stabilizers for electron beam irradiation sterilization, β-diketones, hydrotalcites, alkyl or aryl aminocrotonates, zinc acetylacetonate, zinc dehydroacetate, thiol compounds, etc. have been introduced (Patent Document 6 to 9), but neither of them can be considered to have sufficient effect, especially in the case of electron beam irradiation sterilization that causes serious deterioration, it is difficult to suppress the decrease in transparency and coloring
In addition, in recent studies, it has also been introduced that coloring can be suppressed by adding a silane compound as a radiation resistant agent, and that 3-mercaptopropionate also exhibits an effect in electron beam irradiation sterilization (Patent Documents 10 and 11), but , the status quo is still not very satisfactory results can be obtained even so

Method used

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  • Method to improve visibility of contents, vinyl chloride-based resin composition, stabilizer, vinyl chloride-based resin molded body, medical material, and sterilization processing method
  • Method to improve visibility of contents, vinyl chloride-based resin composition, stabilizer, vinyl chloride-based resin molded body, medical material, and sterilization processing method
  • Method to improve visibility of contents, vinyl chloride-based resin composition, stabilizer, vinyl chloride-based resin molded body, medical material, and sterilization processing method

Examples

Experimental program
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Embodiment

[0198] Examples are given below to illustrate the present invention in more detail, but the present invention is not limited by these examples. In addition, the abbreviated symbols and the measurement of each characteristic of the compound in an Example and an application example are as follows.

[0199] 〔Measurement and evaluation method〕

[0200] (1) The carbon number of saturated fatty alcohol and the ratio of linear saturated fatty alcohol

[0201] Among the 4-cyclohexene-1,2-dicarboxylic acid diesters or 4,5-epoxy-1,2-cyclohexanedicarboxylic acid diesters used in Examples and Comparative Examples of the present invention, for The carbon number of the saturated fatty alcohol that determines the residue in the general formula (1) or (2) and the ratio of the straight-chain saturated fatty alcohol are measured by gas chromatography (hereinafter abbreviated as GC) to the raw material alcohol used for its production. As a result of the composition in these compounds, the rati...

manufacture example 1

[0230] In a 1L four-neck flask equipped with a thermometer, a decanter, a stirring blade, and a reflux cooling pipe, 182.6 g (1.2 moles, manufactured by Shin Nippon Chemical Co., Ltd.) of 4-cyclohexene-1,2-dicarboxylic anhydride was added. Rikacid TH), 374 g (2.9 mol) of 2-ethylhexyl alcohol, and 0.24 g of tetraisopropyl titanate as an esterification catalyst were used, and the reaction temperature was set at 200° C. to carry out the esterification reaction. The reaction was performed until the acid value of the reaction solution reached 0.5 mgKOH / g while refluxing the alcohol under reduced pressure and removing generated water to the outside of the system. After the reaction, the unreacted alcohol was distilled out of the system under reduced pressure, and then neutralized, washed with water, and dehydrated according to a common method to obtain the target stabilizer compound of the present invention, 4-cyclohexene- 369 g of 1, 2- dicarboxylic-acid diester (henceforth "compou...

manufacture example 2

[0233] As a substitute for 374 g (2.9 mol) of 2-ethylhexyl alcohol, an aliphatic saturated alcohol containing 88.5 mol% of a straight-chain saturated fatty alcohol with 9 carbon atoms and 11.1 mol% of a branched-chain saturated fatty alcohol with 9 carbon atoms was added. Alcohol (manufactured by Shell Chemicals, product name: Linevol 9) 416g (2.9 moles), except that, it was carried out in the same manner as in Production Example 1, and 4-cyclohexene-1, which was the stabilizer compound of the present invention, was obtained. 449 g of 2-dicarboxylic acid diester (henceforth "compound 2").

[0234] The obtained compound 2 had an ester value: 260 mgKOH / g, an acid value: 0.04 mgKOH / g, and a chroma: 10.

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Abstract

A purpose of the present invention is to provide a method to improve the visibility of the contents of a material comprising a vinyl chloride-based resin molded body that has been subjected to electron beam irradiation sterilization, as well as to provide a medical material that has improved visibility of the contents thereof after electron beam irradiation sterilization. By including a stabilizerthat comprises 4-cyclohexene-1,2-dicarboxylic acid diester and / or 4,5-epoxycyclohexane-1,2-dicarboxylic acid diester, loss of transparency and staining that occur over time during and after electronbeam irradiation sterilization can be reduced, and a medical material that comprises a vinyl chloride-based resin molded body and has improved visibility of the contents thereof after electron beam irradiation sterilization can be obtained.

Description

technical field [0001] The present invention relates to a method for improving the visibility of the contents of a material sterilized by electron beam irradiation, which is composed of a vinyl chloride-based resin molded body. Specifically, it relates to the above-mentioned vinyl chloride-based resin molded article containing 4-cyclohexene-1,2-dicarboxylic acid dicarboxylate for improving the visibility of the content of medical materials after electron beam irradiation sterilization. The improvement method is made of a stabilizer composed of ester and / or 4,5-epoxycyclohexane-1,2-dicarboxylic acid diester. In addition, the present invention also relates to a medical material in which the visibility of the contents after electron beam irradiation sterilization is improved by using the stabilizer. In addition, the present invention relates to a vinyl chloride-based resin molded article for medical materials sterilized by radiation irradiation, and a method of sterilizing the v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/12
CPCC08K5/12A61L2/087C08L27/06
Inventor 吉近匠生宫崎谦一辻泰树
Owner NEW JAPAN CHEM CO
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