JP4234862B2 - Resin composition, molded resin and tableware for infants - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、環境対策の分野で有用な樹脂組成物、樹脂成形体及び乳幼児用食器に関する。
【０００２】
【従来の技術】
最近、環境中に広く拡散した低濃度の各種化学物質が大きな問題となっている。このような物質としては、例えば、ＤＤＴ、ダイオキシン類、ＰＣＢ類、ビスフェノールＡ、フタル酸エステル類、ノニルフェノール等の非常に多様なものが知られている。これらの物質の中には、誘奇形性、変異原性等の顕著な毒性を示すものが含まれる他、一般に環境ホルモンと呼ばれるような微量で生体内の内分泌を撹乱する作用が疑われているものが多量に報告されている。従って、これらの物質の一部は、環境への放出量について各種の規制が検討されている。
例えば、ダイオキシン類は、有機塩素系樹脂の焼却処理に伴って放出されるため、各種の新たな焼却処理技術によってその放出量を削減することが試みられている。また、一部樹脂に含まれ、樹脂の経時変化に伴い微量が徐々に放出されることが分かっている、ビスフェノールＡやフタル酸エステル類等は、無害と思われるがその内分泌撹乱作用の有無について一部の学者から懸念が表明されている。
【０００３】
上述のような環境に放出された化学物質の濃度を、近い将来において劇的に低下させることは極めて困難である。すでに放出されたこれら化学物質が大量に環境中に存在し、また今後放出量が徐々に低下させられるとしても、劇的に減少させることは難しい。更に、これらの化学物質が有害であるか否かを確認する作業も一般に難しく、しかも、このような確認作業が必要な化合物は膨大であり確認に長い年月を要する。当面は、環境中にこれら微量化学物質が一定量放出され、これを人体に摂取されないように捕捉する技術の開発が望まれている。
例えば、食品や飲料水に含まれるこれら有害な微量化学物質を捕捉することが望まれる。特に妊婦や乳幼児への摂取量を下げることが望まれる。またこれら化学物質を効率よく分析することも各種の対策上必要とされるが、その場合においても、これら化学物質を効率よく集める技術が必要である。
【０００４】
ところで、ディオキシリボ核酸は、各種の微量化学物質、特に変異原性を有する物質を吸着することが知られている。このような性質は、微量化学物質を捕捉するのに好適であるが、ディオキシリボ核酸は水溶性であるため、水や、水を含む食品から微量化学物質を除去する目的にはその使用が難しい。
従って、成形性、加工性、他の材料への混合等が容易であり、微量化学物質を有効に捕捉し、かつ水に不溶の材料の開発が望まれている。
【０００５】
【発明が解決しようとする課題】
本発明の目的は、微量な化学物質を含む樹脂材料から、該有害な物質が環境中に放出されることを抑制又は阻止した、樹脂成形体、乳幼児用食器及びこれらの原材料となる樹脂組成物を提供することにある。
【０００６】
【課題を解決するための手段】
本発明者らは、上記の課題を解決するために鋭意検討した結果、ディオキシリボ核酸(以下、ＤＮＡと略記する)とアンモニウム化合物とからなるポリイオン複合体に、目的とする性質があり、このポリイオン複合体が、樹脂への混合やその加工も容易であることを見出し、本発明を完成した。
すなわち、本発明によれば、式(１)で表される構造のアンモニウム化合物とＤＮＡとのポリイオン複合体、及びポリカーボネート樹脂を含む樹脂組成物が提供される。
【化２】
また本発明によれば、前記樹脂組成物を成形した樹脂成形体が提供される。
更に本発明によれば、前記樹脂成形体を使用したことを特徴とする乳幼児用食器が提供される。
【０００７】
【発明の実施の形態】
以下、本発明について詳細に説明する。
本発明の組成物は、ＤＮＡとアンモニウム化合物とのポリイオン複合体を含む。このポリイオン複合体は、ＤＮＡとアンモニウム化合物とが塩を形成しているものである。
【０００８】
ポリイオン複合体を形成するＤＮＡは、各種の生物等から得られ特に限定されないが、容易に大量のＤＮＡが得られる点から、例えば、鮭や鰊等の魚類の白子から得られるＤＮＡ等が好適である。ポリイオン複合体を形成するアンモニウム化合物としては、得られるポリイオン複合体が水に不溶となるために、炭化水素基又はその誘導体からなる基を有しているアンモニウム化合物が好ましい。このようなアンモニウム化合物としては、上記式(１)で示される化合物が挙げられる。
【０００９】
式( １ )中、Ｘ1〜Ｘ4は、それぞれ独立に炭素数１〜３０のアルキル基等の炭化水素基を示し、Ｘ 1 〜Ｘ 4 のうち少なくとも１つの基の炭素数は１２〜３０を示す。ここで該炭化水素基中の窒素原子と結合していないメチレン基は、二価の炭化水素基又は酸素原子で置換されていてもよい。ただし、これらの構造の中で酸素原子が連続して２個以上結合した構造は含まれない。二価の炭化水素基としては、好ましくは炭素数３〜２０、特に好ましくは炭素数５〜１５のものが使用できる。具体的には、特に限定されないが、パラフェニレン基、１，４−シクロヘキシレン基等が挙げられる。アルキル基中の二価の炭化水素基の数は、１〜５個が好ましく、１〜３個が特に好ましい。
【００１０】
上記アンモニウム化合物の分子構造は、捕捉したい化学物質の種類、使用環境に応じて適宜選択することができる。即ち、Ｘ1〜Ｘ4を適宜選択することができる。例えば、水に不溶とするためには、Ｘ1〜Ｘ4のうち少なくとも１つの基の炭素数が１２以上、３０以下が特に好ましい。上記酸素原子を含むアンモニウム化合物の酸素原子周辺の分子構造は適宜選択できるが、一般には酸素原子の一方にメチル基、他方にメチレン基、若しくは両側にメチレン基が結合している構造が好ましく、酸素原子の両側にメチレン基が結合している構造がさらに好ましく、酸素原子の両側にエチレン基が結合している構造が特に好ましい。このような好ましいアンモニウム化合物としては、例えば、下記構造式(1)〜(3) 及び (5)で示される化合物等が挙げられる。
【００１１】
【化３】
ポリイオン複合体を製造するには、各種公知の方法を組合せて製造することができる。一般的には、ＤＮＡ又はその無機塩、例えば、ＤＮＡのナトリウム塩、ＤＮＡのカリウム塩等と、アンモニウム化合物の塩、例えば、アンモニウム化合物の塩化物、アンモニウム化合物の臭化物等とを、水又は水系溶媒中において混合反応させることにより得ることができる。混合反応させる際の温度、濃度等の反応条件は、用いるアンモニウム化合物の種類、ＤＮＡの分子量等によって適宜選択することができる。該アンモニウム化合物の水への溶解度が低い場合、一般に温度を高くすることが好ましい。生成したポリイオン複合体は、沈殿するので濾過、遠心分離等の方法により分離することができる。
【００１３】
本発明において、上記ポリイオン複合体は単独でも、また他の化学物質捕捉剤等の材料と混合して使用することができる。
本発明の組成物の形態は、特に限定されず、目的に応じて適宜選択できる。例えば、フィルム、途膜、成形体、粉末、ゲル、多孔体等の形態が挙げられる。
本発明において、除去したい化学物質を捕捉させるには、除去したい化学物質を含む溶液、コロイド溶液、気体等を十分な時間接触させることにより行なうことができる。捕捉させる化学物質としては、例えば、ＤＤＴ、ダイオキシン類、ＰＣＢ類、ビスフェノールＡ、フタル酸エステル類、ノニルフェノール、重金属化合物等が挙げられる。
【００１４】
本発明の樹脂組成物は、ポリイオン複合体と、該ポリイオン複合体の物性を変えるような反応が生じない等の樹脂材料とを含む。
本発明の樹脂組成物において、ポリイオン複合体の含有割合は、目的に応じて適宜選択できるが、上記ポリイオン複合体の割合があまり多量に含有させる場合、樹脂組成物を成形した際に形態が保持できない恐れがある。また少なすぎるとポリイオン複合体の能力が低下する恐れがある。従って、樹脂組成物全量に対して、通常、前記ポリイオン複合体が、０．１〜５０重量％の割合が好ましく、１〜１０重量％の割合が特に好ましい。
本発明の樹脂組成物において、ポリイオン複合体を含有させる方法としては特に限定されないが、樹脂材料に、ポリイオン複合体を、溶融混合、混練、溶液混合等の方法により含有させることができる。
【００１５】
本発明の樹脂組成物に用いる樹脂材料は、前記ポリイオン複合体と反応せずに所望作用を保持できるものであれば特に限定されない。例えば、ポリエチレン樹脂、ポリプロピレン樹脂、ポリスチレン樹脂等の汎用樹脂；ポリカーボネート樹脂、ポリエステル樹脂、ポリアミド樹脂、ポリイミド樹脂等のエンジニアリング樹脂等が挙げられる。
これらの樹脂材料中に、可塑剤や残留モノマーが含まれる場合、前記ポリイオン複合体により、樹脂組成物を成形した際に、これらの可塑剤や残留モノマーが得られる成形物から放出され難くなる。
また、樹脂材料として、ポリカーボネート樹脂を用いる場合には、通常、その成形物から放出される、残留モノマーとしての微量のビスフェノールＡの放出が著しく抑制される。
【００１６】
本発明の樹脂成形体及び乳幼児用食器は、樹脂材料としてポリカーボネート樹脂を含む前記樹脂組成物を成形することにより得られる。成形方法は、一般にポリカーボネート樹脂の成形に用いられる方法等が使用でき、様々な形態及び用途の成形体とすることができる。得られる成形体は、樹脂材料としてポリカーボネート樹脂を含むために、通常、その成形体から残留モノマーとしてのビスフェノールＡが放出される恐れがある。
しかし、成形体中に含有される前記ポリイオン複合体が、このビスフェノールＡを捕捉し、その放出を抑制する。とりわけ乳幼児用食器にこの樹脂成形体を使用すれば、乳幼児のビスフェノールＡ摂取量が従来よりも抑制される。乳幼児用食器としては、例えば、ほ乳瓶、皿等が挙げられ、特に、哺乳瓶への使用が有用である。
【００１７】
【実施例】
以下、本発明の実施例を示すが、本発明はこれらによって限定されるものではない。
実施例
＜ポリイオン複合体の作製＞
ジャーナル・オブ・アメリカン・ケミカル・ソサイエティ(Journal of American Chemical Society)、第１１８巻、４４号、１０６７９頁〜１０６７９頁(１９９６年)記載の材料、方法に従い、ＤＮＡと、Ｎ，Ｎ，Ｎ−トリメチル−Ｎ−(３，６，９，１２−テトラオキサドコシル)アンモニウムイオンとのポリイオン複合体を作製した。即ち、鮭の精子由来ＤＮＡ Ｎａ塩(シグマ社製)５０．０ｍｇを２０ｍｌの水に溶解し、氷冷撹拌下、Ｎ，Ｎ，Ｎ−トリメチル−Ｎ−(３，６，９，１２−テトラオキサドコシル)アンモニウムブロマイド１ｇを水２００ｍｌに溶解させた溶液を加え、白色繊維状のポリイオン複合体の沈澱を得た。濾過により沈澱１．４ｇを回収し、乾燥した。
＜フィルムの作製＞
得られたポリイオン複合体２５０ｍｇをクロロホルム／エタノール(４：１)１０ｇに溶解し、１重量％の溶液を調製した。一方、ポリカーボネート樹脂(帝人(株)製、商品名「パンライト Ｃ−１４００」)をクロロホルムに溶解し、１０重量％の溶液を調製した。次いで、調製した、ポリカーボネート樹脂溶液６ｇに、上記ポリイオン複合体溶液０．３ｇを加えて混合した。得られた混合溶液０．２ｇを型に注入し、風乾してフィルムを作製した。
＜ビスフェノールＡの溶出量の評価＞
得られたフィルムを細かく切断して３０ｇの水に投入した後、１００℃に加温して３時間撹拌した。次いで、得られた水の紫外可視の吸収スペクトルを測定した。紫外部の吸収強度を図１に示す。この吸収はビスフェノールＡを主体とする芳香族化合物に由来する。
【００１８】
比較例１
＜フィルムの作製＞
ポリカーボネート樹脂(帝人(株)製、商品名「パンライト Ｃ−１４００」)をクロロホルムに溶解し、１０重量％の溶液を調製した。このポリカーボネート樹脂溶液０．２ｇをキャストし風乾してフィルムを作製した。
＜ビスフェノールＡの溶出量の評価＞
得られたフィルムを細かく切断して３０ｇの水に投入した後、１００℃に加温して３時間撹拌した。次いで、得られた水の紫外可視の吸収スペクトルを測定した。紫外部の吸収強度を図１に示す。
図１の結果より、本発明の化学物質捕捉剤を含む実施例１のフィルムは、化学物質捕捉剤を含まない比較例１のフィルムに比してビスフェノールＡの放出量が１／２に半減することが判る。
【００１９】
【発明の効果】
本発明の樹脂組成物、成形体からは一般に溶出物が少なく、特に、ポリカーボネート樹脂を用いた成形体や乳幼児用食器の場合、ビスフェノールＡの溶出が特に少なく、環境的にも、工業的にも価値が高い。
【図面の簡単な説明】
【図１】実施例１及び比較例１で調製した水の紫外吸収スペクトルを示すチャートである。
【符号の説明】
１：実施例１で調製した水の紫外吸収スペクトル
２：比較例１で調製した水の紫外吸収スペクトル[0001]
BACKGROUND OF THE INVENTION
The present invention is useful tree fat composition in the field of environmental protection, the resin molded body and a infant tableware.
[0002]
[Prior art]
Recently, low concentrations of various chemical substances that have diffused widely in the environment have become a major problem. As such substances, for example, a wide variety of substances such as DDT, dioxins, PCBs, bisphenol A, phthalates, and nonylphenol are known. Some of these substances show remarkable toxicity such as teratogenicity, mutagenicity, etc., and they are suspected of disrupting in vivo endocrine secretion in a small amount, generally called environmental hormones. A lot of things have been reported. Therefore, various regulations on the amount of these substances released into the environment are being studied.
For example, since dioxins are released along with the incineration treatment of organochlorine resin, attempts have been made to reduce the emission amount by various new incineration treatment techniques. In addition, bisphenol A and phthalates, which are partly contained in resins and are known to be gradually released as the resin changes over time, are considered harmless, but their endocrine disrupting activity Concerns have been expressed by some scholars.
[0003]
It is extremely difficult to dramatically reduce the concentration of chemicals released into the environment as described above in the near future. Even if these released chemicals are present in the environment in large quantities and the release amount is gradually reduced in the future, it is difficult to reduce them dramatically. Furthermore, it is generally difficult to confirm whether or not these chemical substances are harmful. Moreover, the number of compounds that require such confirmation work is enormous, and it takes a long time for confirmation. For the time being, it is desired to develop a technique for capturing a certain amount of these trace chemical substances in the environment so that they are not ingested by the human body.
For example, it is desired to capture these harmful trace chemical substances contained in food and drinking water. In particular, it is desirable to reduce the intake to pregnant women and infants. In addition, efficient analysis of these chemical substances is required for various countermeasures, and even in that case, a technique for efficiently collecting these chemical substances is required.
[0004]
By the way, it is known that dioxyribonucleic acid adsorbs various trace chemical substances, particularly substances having mutagenic properties. Such properties are suitable for capturing trace chemical substances, but since dioxyribonucleic acid is water-soluble, its use is difficult for the purpose of removing trace chemical substances from water or foods containing water.
Therefore, it is desired to develop a material that is easily moldable, workable, mixed with other materials, effectively captures trace chemical substances, and is insoluble in water.
[0005]
[Problems to be solved by the invention]
An object of the present invention, a resin material containing a fine amount of chemicals, the harmful substances is inhibited or prevented from being released into the environment, the resin molded body, the resin composition comprising an infant tableware and these raw materials To provide things.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have found that a polyion complex composed of dioxyribonucleic acid (hereinafter abbreviated as DNA) and an ammonium compound has the desired properties. The present invention was completed by finding that the body can be easily mixed into a resin and processed.
That is, according to the present invention, there is provided a resin composition comprising a polyion complex of an ammonium compound having a structure represented by the formula (1) and DNA, and a polycarbonate resin.
[Chemical formula 2]
Moreover, according to this invention, the resin molding which shape | molded the said resin composition is provided.
Furthermore, according to this invention, the tableware for infants characterized by using the said resin molding is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The composition of the present invention comprises a polyion complex of DNA and an ammonium compound. In this polyion complex, DNA and an ammonium compound form a salt.
[0008]
The DNA that forms the polyion complex is not particularly limited and can be obtained from various organisms. However, from the viewpoint that a large amount of DNA can be easily obtained, for example, DNA obtained from a fish larvae such as salmon and carp is suitable. is there. As the ammonium compound forming the polyion complex, an ammonium compound having a group consisting of a hydrocarbon group or a derivative thereof is preferable because the resulting polyion complex is insoluble in water. Such ammonium compounds, compounds represented by the above formula (1).
[0009]
In the formula ( 1 ) , X 1 to X 4 each independently represent a hydrocarbon group such as an alkyl group having 1 to 30 carbon atoms , and at least one group of X 1 to X 4 has 12 to 30 carbon atoms. Indicates. Here, the methylene group not bonded to the nitrogen atom in the hydrocarbon group may be substituted with a divalent hydrocarbon group or an oxygen atom. However, a structure in which two or more oxygen atoms are continuously bonded is not included in these structures. As the divalent hydrocarbon group, those having 3 to 20 carbon atoms, particularly preferably those having 5 to 15 carbon atoms can be used. Specific examples include, but are not limited to, a paraphenylene group and a 1,4-cyclohexylene group. The number of divalent hydrocarbon groups in the alkyl group is preferably 1 to 5, particularly preferably 1 to 3.
[0010]
The molecular structure of the ammonium compound can be appropriately selected according to the type of chemical substance to be captured and the usage environment. That is, X 1 to X 4 can be appropriately selected. For example, in order to make it insoluble in water, the number of carbon atoms of at least one group among X 1 to X 4 is particularly preferably 12 or more and 30 or less. The molecular structure around the oxygen atom of the ammonium compound containing the oxygen atom can be selected as appropriate, but in general, a structure in which a methyl group is bonded to one oxygen atom, a methylene group to the other, or a methylene group bonded to both sides is preferable. A structure in which methylene groups are bonded to both sides of the atom is more preferable, and a structure in which ethylene groups are bonded to both sides of the oxygen atom is particularly preferable. Examples of such preferred ammonium compounds include compounds represented by the following structural formulas (1) to (3) and (5) .
[0011]
[Chemical 3]
In order to produce the polyion complex, various known methods can be combined. In general, DNA or an inorganic salt thereof, such as a sodium salt of DNA or a potassium salt of DNA, and a salt of an ammonium compound, such as a chloride of an ammonium compound or a bromide of an ammonium compound, are mixed with water or an aqueous solvent. It can be obtained by mixing reaction in the inside. Reaction conditions such as temperature and concentration for the mixing reaction can be appropriately selected depending on the type of ammonium compound used, the molecular weight of DNA, and the like. When the solubility of the ammonium compound in water is low, it is generally preferable to increase the temperature. Since the produced polyion complex precipitates, it can be separated by a method such as filtration or centrifugation.
[0013]
In the present invention , the above polyion complex can be used alone or in combination with other materials such as chemical scavengers.
The form of the composition of this invention is not specifically limited, According to the objective, it can select suitably. For example, forms, such as a film, a film, a molded object, a powder, a gel, a porous body, are mentioned.
In the present invention, in order to capture the chemicals to be removed, the solution containing the chemical substance to be divided, colloidal solution, a gas or the like can be carried out by contacting a sufficient time. Examples of the chemical substance to be captured include DDT, dioxins, PCBs, bisphenol A, phthalates, nonylphenol, heavy metal compounds, and the like.
[0014]
The resin composition of the present invention includes a polyion complex and a resin material that does not cause a reaction that changes the physical properties of the polyion complex .
In the resin composition of the present invention, the content of the polyion complex can be appropriately selected depending on the purpose, if the ratio of the upper Symbol polyion complex causes too large amount is contained, it forms upon molding the resin composition There is a risk that it cannot be retained. Moreover, when there is too little, there exists a possibility that the capability of a polyion complex may fall. Therefore, the resin composition the total amount, usually before Kipo Riion complex, the proportion of 0.1 to 50 wt% is preferred, proportions of 1 to 10% by weight is particularly preferred.
In the resin composition of the present invention, the method for containing the polyion complex is not particularly limited, but the polyion complex can be contained in the resin material by a method such as melt mixing, kneading, or solution mixing.
[0015]
The resin material used for the resin composition of the present invention is not particularly limited as long as it can maintain a desired action without reacting with the polyion complex . Examples include general-purpose resins such as polyethylene resin, polypropylene resin, and polystyrene resin; engineering resins such as polycarbonate resin, polyester resin, polyamide resin, and polyimide resin.
When these resin materials contain a plasticizer or a residual monomer, when the resin composition is molded by the polyion complex , it becomes difficult to release the plasticizer and the residual monomer from the molded product obtained.
Further, when a polycarbonate resin is used as the resin material, the release of a trace amount of bisphenol A as a residual monomer that is usually released from the molded product is remarkably suppressed.
[0016]
The resin molded body and the tableware for infants of this invention are obtained by shape | molding the said resin composition containing polycarbonate resin as a resin material. As a molding method, a method generally used for molding a polycarbonate resin can be used, and molded bodies having various forms and applications can be obtained. Since the obtained molded body contains a polycarbonate resin as a resin material, there is a possibility that bisphenol A as a residual monomer is usually released from the molded body.
However, the polyion complex contained in the molded body captures the bisphenol A and suppresses its release. In particular, if this resin molded body is used for tableware for infants, the amount of bisphenol A intake by infants can be suppressed more than before. Examples of the tableware for infants include baby bottles and dishes, and the use for baby bottles is particularly useful.
[0017]
【Example】
Examples of the present invention will be described below, but the present invention is not limited thereto.
Example <Preparation of polyion complex>
According to the materials and methods described in Journal of American Chemical Society, Vol. 118, No. 44, pp. 10679-10679 (1996), DNA and N, N, N-trimethyl A polyion complex with -N- (3,6,9,12-tetraoxadocosyl) ammonium ion was prepared. That is, 50.0 mg of DNA Na salt derived from strawberry sperm (manufactured by Sigma) was dissolved in 20 ml of water, and N, N, N-trimethyl-N- (3,6,9,12-tetra) was stirred under ice cooling. A solution prepared by dissolving 1 g of oxadocosyl) ammonium bromide in 200 ml of water was added to obtain a precipitate of white fibrous polyion complex. 1.4g of precipitate was collected by filtration and dried.
<Production of film>
250 mg of the obtained polyion complex was dissolved in 10 g of chloroform / ethanol (4: 1) to prepare a 1% by weight solution. Meanwhile, a polycarbonate resin (manufactured by Teijin Ltd., trade name “Panlite C-1400”) was dissolved in chloroform to prepare a 10% by weight solution. Next, 0.3 g of the polyion complex solution was added to and mixed with 6 g of the prepared polycarbonate resin solution. 0.2 g of the obtained mixed solution was poured into a mold and air-dried to produce a film.
<Evaluation of elution amount of bisphenol A>
The obtained film was finely cut and poured into 30 g of water, heated to 100 ° C. and stirred for 3 hours. Subsequently, the ultraviolet-visible absorption spectrum of the obtained water was measured. The absorption intensity in the ultraviolet region is shown in FIG. This absorption is derived from an aromatic compound mainly composed of bisphenol A.
[0018]
Comparative Example 1
<Production of film>
A polycarbonate resin (manufactured by Teijin Limited, trade name “Panlite C-1400”) was dissolved in chloroform to prepare a 10 wt% solution. 0.2 g of this polycarbonate resin solution was cast and air-dried to produce a film.
<Evaluation of elution amount of bisphenol A>
The obtained film was finely cut and poured into 30 g of water, heated to 100 ° C. and stirred for 3 hours. Subsequently, the ultraviolet-visible absorption spectrum of the obtained water was measured. The absorption intensity in the ultraviolet region is shown in FIG.
From the results of FIG. 1, the film of Example 1 containing the chemical substance scavenger of the present invention halves the amount of bisphenol A released compared to the film of Comparative Example 1 containing no chemical substance scavenger. I understand that.
[0019]
【The invention's effect】
Tree fat compositions of the present invention, generally the eluate from the molded body is small, especially in the case of the molded body and infant tableware with polycarbonate resin, eluting in particular less of bisphenol A, also environmentally, industrially Is also very valuable.
[Brief description of the drawings]
1 is a chart showing ultraviolet absorption spectra of water prepared in Example 1 and Comparative Example 1. FIG.
[Explanation of symbols]
1: UV absorption spectrum of water prepared in Example 1 2: UV absorption spectrum of water prepared in Comparative Example 1
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP27676199A JP4234862B2 (en) | 1999-09-29 | 1999-09-29 | Resin composition, molded resin and tableware for infants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27676199A JP4234862B2 (en) | 1999-09-29 | 1999-09-29 | Resin composition, molded resin and tableware for infants |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2008196529A Division JP2009000683A (en) | 2008-07-30 | 2008-07-30 | Chemical-substance scavenger and resin composition |
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| JP2001096150A JP2001096150A (en) | 2001-04-10 |
| JP2001096150A5 JP2001096150A5 (en) | 2006-08-31 |
| JP4234862B2 true JP4234862B2 (en) | 2009-03-04 |
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| JP2007091647A (en) * | 2005-09-29 | 2007-04-12 | Trekion Co Ltd | Antimicrobial dna salt composition |
| JP2007277447A (en) * | 2006-04-10 | 2007-10-25 | Inoac Corp | Nucleotide chain carrier and application thereof |
| EP2742997B1 (en) * | 2011-08-09 | 2018-09-19 | Toray Industries, Inc. | Carrier for adsorption and method for producing same |
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