JP2006137671A - Method for preserving aminocarboxylic acid ester - Google Patents

Method for preserving aminocarboxylic acid ester Download PDF

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JP2006137671A
JP2006137671A JP2004325937A JP2004325937A JP2006137671A JP 2006137671 A JP2006137671 A JP 2006137671A JP 2004325937 A JP2004325937 A JP 2004325937A JP 2004325937 A JP2004325937 A JP 2004325937A JP 2006137671 A JP2006137671 A JP 2006137671A
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acid ester
reducing agent
aminocarboxylic acid
based reducing
linear
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JP4531528B2 (en
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Tomoshi Goto
智志 後藤
Katsuhisa Inoue
勝久 井上
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Kao Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preserving an aminocarboxylic acid ester to be a raw material for surfactants. <P>SOLUTION: The method for preserving the aminocarboxylic acid ester is carried out as follows. The aminocarboxylic acid ester represented by general formula (1) [wherein, R<SP>1</SP>and R<SP>2</SP>denote each a 1-5C straight-chain or branched chain alkyl group or the like; R<SP>1</SP>and R<SP>2</SP>may be bound to form a ring; R<SP>3</SP>denotes a hydrogen or a 1-5C straight-chain or branched alkyl group or the like; and R<SP>4</SP>denotes a 1-10C straight-chain or branched chain alkyl group or the like] is made to exist with a phosphorus reducing agent or a sulfur reducing agent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、界面活性剤の原料として有用なアミノカルボン酸エステルの保存方法、アミノカルボン酸エステル含有物品、及びアミノカルボン酸エステルの色相劣化を抑制する方法に関する。   The present invention relates to a method for preserving an aminocarboxylic acid ester useful as a raw material for a surfactant, an aminocarboxylic acid ester-containing article, and a method for suppressing hue deterioration of the aminocarboxylic acid ester.

繊維用柔軟剤や毛髪コンディショニング剤等に使用される界面活性剤は、繊維や毛髪への柔軟化等の基本性能付与の他に、身体に対する安全性、生分解性や魚毒性、藻類毒性等の環境安全性等の諸特性に優れたものが要望されており、これらの要件を満たす界面活性剤としてアミノカルボン酸アミド又はその塩がある。   Surfactants used for fabric softeners and hair conditioning agents are not only for providing basic performance such as softening to fibers and hair, but also for safety to the body, biodegradability, fish toxicity, algae toxicity, etc. The thing excellent in various characteristics, such as environmental safety, is requested | required, and there exists aminocarboxylic acid amide or its salt as surfactant which satisfy | fills these requirements.

アミノカルボン酸アミドの合成例としては、特許文献1にアミノカルボン酸エステルとアミンを反応させる方法が記載されている。しかし、アミノカルボン酸エステルを用いる方法は、原料中に存在する僅かな不純物が熱的に或いは微量の空気の存在下に着色物質へ転化し、著しい着色が起こる等の課題があり、容易に製造することが困難であった。   As a synthesis example of an aminocarboxylic acid amide, Patent Document 1 describes a method of reacting an aminocarboxylic acid ester with an amine. However, the method using an aminocarboxylic acid ester has a problem that a slight impurity present in the raw material is converted into a colored substance thermally or in the presence of a small amount of air, and there is a problem that significant coloring occurs. It was difficult to do.

そして上記の界面活性剤に要求される品質の一つに色相が良いことが挙げられることから、アミノカルボン酸エステルの色相を良好な状態で維持する方法の開発が求められている。
特開昭55−143944号公報 特開平10−236988号公報 特開昭48−61435号公報 特開2002−332219号公報
One of the qualities required for the above-mentioned surfactants is that the hue is good. Therefore, development of a method for maintaining the hue of the aminocarboxylic acid ester in a good state has been demanded.
JP 55-143944 A Japanese Patent Laid-Open No. 10-236988 JP-A-48-61435 JP 2002-332219 A

熱或いは空気等による酸化に対する一般的な有機化合物の安定化法としては、特許文献2にベンゾフラノ−2−オン型化合物、有機ホスファイト又はホスホナイト型化合物、フェノール酸化防止剤型の化合物及び立体障害アミン型化合物を含む組成物が記載されているが、組成物の構成が複雑であり、より簡便な安定化法が求められる。   As a method for stabilizing a general organic compound against oxidation by heat or air, Patent Document 2 discloses a benzofurano-2-one type compound, an organic phosphite or phosphonite type compound, a phenol antioxidant type compound, and a sterically hindered amine. Although the composition containing the type compound is described, the composition of the composition is complicated, and a simpler stabilization method is required.

一般に使用されるような還元剤(例えば、SBH)では、空気とも反応してしまい、必ずしも添加した還元剤がアミン化合物の色相劣化防止に有効に作用せず、保存品の色相改善に最適でない場合がある。更に、SBHのような還元剤では、共存する空気等の夾雑物とも反応してしまうこともあり、還元力の強い剤を用いることは必ずしも有効ではない。   When a reducing agent (for example, SBH) generally used reacts with air, the added reducing agent does not necessarily work effectively to prevent hue deterioration of the amine compound, and is not optimal for improving the hue of stored products. There is. Furthermore, in the case of a reducing agent such as SBH, it may react with impurities such as coexisting air, so it is not always effective to use an agent having a strong reducing power.

また、特許文献3では芳香族アミンの安定化に有機リン化合物を用いた方法が記載されているが、本発明が対象とするアミノカルボン酸エステルは、当該発明が対象とする芳香族アミンよりもきわめて不安定であり、当該発明の安定化方法は本発明が対象とするアミノカルボン酸エステルに対して顕著な効果を与えるものではない。   Patent Document 3 describes a method using an organophosphorus compound for stabilizing an aromatic amine, but the aminocarboxylic acid ester targeted by the present invention is more than the aromatic amine targeted by the present invention. It is extremely unstable, and the stabilization method of the present invention does not give a remarkable effect to the aminocarboxylic acid ester targeted by the present invention.

従って、本発明の課題は、長期保存しても着色を最小限に抑えることのできるアミノカルボン酸エステルの保存方法、アミノカルボン酸エステル含有物品、及びアミノカルボン酸エステルの色相劣化を抑制する方法を提供することである。   Accordingly, an object of the present invention is to provide an aminocarboxylic acid ester storage method, an aminocarboxylic acid ester-containing article, and a method for suppressing hue deterioration of an aminocarboxylic acid ester that can minimize coloring even after long-term storage. Is to provide.

本発明は、課題の解決手段として、下記一般式(1):   As a means for solving the problems, the present invention provides the following general formula (1):

Figure 2006137671
Figure 2006137671

〔式中、
、Rは、無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基、炭素数1〜5の直鎖もしくは分岐鎖のアルケニル基、又は炭素数1〜5の直鎖もしくは分岐鎖のヒドロキシアルキル基を示し、RとRは結合して環を形成してもよい;
は、水素又は無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基、炭素数1〜5の直鎖もしくは分岐鎖のアルケニル基、又は炭素数1〜5の直鎖もしくは分岐鎖のヒドロキシアルキル基を示す;
4は、無置換もしくは置換されていてもよい炭素数1〜10の直鎖もしくは分岐鎖のアルキル基、又は無置換もしくは置換されていてもよい炭素数1〜10の直鎖もしくは分岐鎖のアルケニル基で表される基を示す。〕
で表されるアミノカルボン酸エステルとリン系の還元剤又は硫黄系の還元剤を、密閉系内で共存させるアミノカルボン酸エステルの保存方法を提供する。
[Where,
R 1 and R 2 are each an unsubstituted or optionally substituted linear or branched alkyl group having 1 to 5 carbon atoms, a linear or branched alkenyl group having 1 to 5 carbon atoms, or a carbon number of 1 Represents a linear or branched hydroxyalkyl group of ˜5, R 1 and R 2 may combine to form a ring;
R 3 is hydrogen, an unsubstituted or optionally substituted linear or branched alkyl group having 1 to 5 carbon atoms, a linear or branched alkenyl group having 1 to 5 carbon atoms, or a carbon number of 1 to 5 represents a linear or branched hydroxyalkyl group;
R 4 is a linear or branched alkyl group having 1 to 10 carbon atoms which may be unsubstituted or substituted, or a linear or branched chain having 1 to 10 carbon atoms which may be unsubstituted or substituted. A group represented by an alkenyl group is shown. ]
A method for preserving an aminocarboxylic acid ester is provided in which a phosphorus-based reducing agent or a sulfur-based reducing agent is allowed to coexist in a closed system.

本発明は、他の課題の解決手段として、請求項1記載の一般式(1)で表されるアミノカルボン酸エステルを100質量部と、請求項1〜6に記載のリン系の還元剤又は硫黄系の還元剤を0.1質量部以上共存させることにより、一般式(1)で表されるアミノカルボン酸エステルの色相劣化を抑制する方法を提供する。   As a means for solving other problems, the present invention provides 100 parts by mass of the aminocarboxylic acid ester represented by the general formula (1) according to claim 1 and the phosphorus-based reducing agent according to claims 1 to 6 or Provided is a method for suppressing the hue deterioration of the aminocarboxylic acid ester represented by the general formula (1) by coexisting 0.1 part by mass or more of a sulfur-based reducing agent.

本発明は、更に他の課題の解決手段として、請求項1記載の一般式(1)で表されるアミノカルボン酸エステルを100質量部と、請求項1〜6に記載のリン系の還元剤又は硫黄系の還元剤を0.1質量部以上含有する、色相劣化が抑制された一般式(1)で表されるアミノカルボン酸エステル含有物品を提供する。   As a means for solving another problem, the present invention provides 100 parts by mass of the aminocarboxylic acid ester represented by the general formula (1) according to claim 1 and the phosphorus-based reducing agent according to claims 1 to 6. Alternatively, the present invention provides an aminocarboxylic acid ester-containing article represented by the general formula (1), which contains 0.1 part by mass or more of a sulfur-based reducing agent and in which hue deterioration is suppressed.

本発明の保存方法等を適用することにより、一般式(1)のアミノカルボン酸エステルの色相変化を抑制することができる。   By applying the storage method of the present invention, the hue change of the aminocarboxylic acid ester of the general formula (1) can be suppressed.

本発明の保存方法では、密閉系内にて、一般式(1)で表されるアミノカルボン酸エステルとリン系の還元剤又は硫黄系の還元剤を共存させる。   In the preservation method of the present invention, the aminocarboxylic acid ester represented by the general formula (1) and a phosphorus-based reducing agent or a sulfur-based reducing agent coexist in a closed system.

<アミノカルボン酸エステル>
一般式(1)で表されるアミノカルボン酸エステルとしては、N,N−ジメチルグリシンメチル、N,N−ジメチルグリシンエチル、N,N−ジメチルグリシンイソプロピル、N,N−ジエチルグリシンメチル、N,N−ジエチルグリシンエチル、N,N−ジメチルアラニンメチル、N,N−ジメチルアラニンエチル、N,N−ジメチルセリンメチル、N,N−ジメチルバリンメチル、N,N−ジメチルスレオニンメチル、N−エチル−N−メチルグリシンメチル、N−(2−ヒドロキシエチル)−N−メチルグリシンエチル、3−(N−(2−ヒドロキシエチル)−N−メチルアミノ)アラニンイソプロピル、N,N−ビス(2−ヒドロキシエチル)グリシンメチル等が挙げられる。
<Aminocarboxylic acid ester>
Examples of the aminocarboxylic acid ester represented by the general formula (1) include N, N-dimethylglycine methyl, N, N-dimethylglycine ethyl, N, N-dimethylglycine isopropyl, N, N-diethylglycine methyl, N, N-diethylglycine ethyl, N, N-dimethylalanine methyl, N, N-dimethylalanine ethyl, N, N-dimethylserine methyl, N, N-dimethylvaline methyl, N, N-dimethylthreonine methyl, N-ethyl- N-methylglycine methyl, N- (2-hydroxyethyl) -N-methylglycine ethyl, 3- (N- (2-hydroxyethyl) -N-methylamino) alanine isopropyl, N, N-bis (2-hydroxy) And ethyl) glycine methyl.

これらの中では、R1、R2は、無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基が好ましく、無置換の炭素数1〜5の直鎖もしくは分岐鎖のアルキル基がより好ましく、メチル基もしくはエチル基が特に好ましい。 Among these, R 1 and R 2 are preferably unsubstituted or substituted linear or branched alkyl groups having 1 to 5 carbon atoms, and are unsubstituted or straight chain having 1 to 5 carbon atoms. A branched alkyl group is more preferable, and a methyl group or an ethyl group is particularly preferable.

は、水素、炭素数1〜5の直鎖もしくは分岐鎖のアルキル基、又は炭素数1〜5の直鎖もしくは分岐鎖のアルケニル基が好ましく、水素又は炭素数1〜3の直鎖もしくは分岐鎖のアルキル基がより好ましく、水素又はメチル基が特に好ましい。 R 3 is preferably hydrogen, a linear or branched alkyl group having 1 to 5 carbon atoms, or a linear or branched alkenyl group having 1 to 5 carbon atoms. A branched alkyl group is more preferred, and hydrogen or a methyl group is particularly preferred.

4は、無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基が好ましく、無置換の炭素数1〜5の直鎖もしくは分岐鎖のアルキル基がより好ましく、メチル基もしくはエチル基が特に好ましい。 R 4 is preferably an unsubstituted or optionally substituted linear or branched alkyl group having 1 to 5 carbon atoms, more preferably an unsubstituted linear or branched alkyl group having 1 to 5 carbon atoms. A methyl group or an ethyl group is particularly preferable.

一般式(1)で表されるアミノカルボン酸エステルは、公知のどのような方法で製造しても良い。例えば、ハロゲン置換されたカルボン酸エステルとアミンとの置換反応、アミノ基を有するカルボン酸のエステルか反応等が挙げられる。   The aminocarboxylic acid ester represented by the general formula (1) may be produced by any known method. Examples thereof include a substitution reaction between a halogen-substituted carboxylic acid ester and an amine, an ester of a carboxylic acid having an amino group, or a reaction.

<還元剤>
リン系の還元剤としては、亜リン酸、次亜リン酸、亜リン酸又は次亜リン酸の塩、亜リン酸又は次亜リン酸のエステル類が挙げられる。
<Reducing agent>
Examples of the phosphorus reducing agent include phosphorous acid, hypophosphorous acid, phosphorous acid or hypophosphorous acid salts, phosphorous acid or hypophosphorous acid esters.

塩としては、ナトリウムやカリウムのモノ塩、ジ塩、トリ塩等が挙げられる。エステル類としては、亜リン酸や次亜リン酸のモノ置換、ジ置換もしくはトリ置換の炭素数1〜5の直鎖又は分岐鎖のアルキルエステルや、ジフェニルハイドロゲンホスファイト、ビス(t−ブチルフェニル)ペンタエリスリトールジホスファイト、ビス(2,4−ジ−t−ブチルフェニル)ペンタエリスリトールジホスファイト、ビス(4−メチル−2,6−ジ−t−ブチルフェニル)ペンタエリスリトールジホスファイト、ビス(ノニルフェニル)ペンタエリスリトールジホスファイト、ジステアリルペンタエリスリトールジホスファイト、9,10−ジヒドロ−9−オキサ−10−ホスファフェナントレン−10−オキサイド等が挙げられる。   Examples of the salt include sodium and potassium mono-salts, di-salts, and tri-salts. Esters include monosubstituted, disubstituted or trisubstituted linear or branched alkyl esters of phosphorous acid and hypophosphorous acid, diphenyl hydrogen phosphite, bis (t-butylphenyl). ) Pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (4-methyl-2,6-di-t-butylphenyl) pentaerythritol diphosphite, bis (Nonylphenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and the like can be mentioned.

特に、亜リン酸、次亜リン酸、及びこれらのナトリウムやカリウムの塩、及び炭素数1〜3の直鎖又は分岐鎖のモノアルキルエステル、ジアルキルエステル又はトリアルキルエステルが好ましい。   In particular, phosphorous acid, hypophosphorous acid, and salts thereof such as sodium and potassium, and linear or branched monoalkyl esters, dialkyl esters, or trialkyl esters having 1 to 3 carbon atoms are preferable.

硫黄系の還元剤としては、亜硫酸、次亜硫酸、亜硫酸又は次亜硫酸の塩、亜硫酸又は次亜硫酸のエステル類が挙げられる。   Examples of sulfur-based reducing agents include sulfurous acid, hyposulfite, sulfurous acid or hyposulfite salts, sulfurous acid or hyposulfite esters.

塩としては、ナトリウムやカリウムのモノ塩、ジ塩等が挙げられ、エステル類としては、亜硫酸や次亜硫酸のモノ置換もしくはジ置換の炭素数1〜5の直鎖又は分岐鎖のアルキルエステル等があげられる。特に、亜硫酸、次亜硫酸、及びこれらのナトリウムやカリウムの塩、及び炭素数1〜3の直鎖又は分岐鎖のモノアルキルエステルもしくはジアルキルエステルが好ましい。   Examples of the salt include mono- and di-salts of sodium and potassium, and examples of esters include mono- or di-substituted C1-C5 linear or branched alkyl esters of sulfurous acid and hyposulfite. can give. In particular, sulfurous acid, hyposulfite, and salts thereof such as sodium and potassium, and linear or branched monoalkyl esters or dialkyl esters having 1 to 3 carbon atoms are preferable.

リン系の還元剤と硫黄系の還元剤は、単独で使用することもできるし、リン系の還元剤と硫黄系の還元剤を併用することもできる。   The phosphorus-based reducing agent and the sulfur-based reducing agent can be used alone, or a phosphorus-based reducing agent and a sulfur-based reducing agent can be used in combination.

<その他の成分>
一般式(1)のアミノカルボン酸エステルと還元剤と共に色相安定化剤を添加することができる。色相安定化剤としては、トコフェロール、水素化ホウ素ナトリウム等が挙げられる。
<Other ingredients>
A hue stabilizer can be added together with the aminocarboxylic acid ester of the general formula (1) and the reducing agent. Examples of the hue stabilizer include tocopherol and sodium borohydride.

<密閉系>
密閉系は、大気雰囲気と通じていない閉鎖系であればよく、製造工程途中の密閉タンク内に一般式(I)のアミノカルボン酸エステルが存在しているような場合のほか、ガラス、プラスチック、金属製等の蓋付きの容器のような、大気を遮断できる容器の中で一般式(I)のアミノカルボン酸エステルを保存するような場合でもよい。
<Sealed system>
The closed system may be a closed system that does not communicate with the air atmosphere. In addition to the case where the aminocarboxylic acid ester of the general formula (I) is present in the closed tank in the middle of the manufacturing process, glass, plastic, It may be a case where the aminocarboxylic acid ester of the general formula (I) is stored in a container capable of blocking the atmosphere, such as a container with a lid made of metal or the like.

<保存方法及び色相劣化の抑制方法>
好ましくは密閉系において、一般式(I)のアミノカルボン酸エステル、還元剤、必要に応じて色相安定化剤等のその他の成分を添加し、攪拌混合する。
<Preservation method and suppression method of hue deterioration>
Preferably, in the closed system, other components such as an aminocarboxylic acid ester of the general formula (I), a reducing agent, and a hue stabilizer as necessary are added and mixed with stirring.

一般式(I)のアミノカルボン酸エステルと還元剤の添加量は、一般式(1)で表されるエステル基を有するアミノ化合物100質量部に対し、還元剤を0.1質量部以上が好ましく、より好ましくは0.1〜5質量部、更に好ましくは0.2〜2質量部である
密閉系内は、窒素ガス、二酸化炭素ガス、不活性ガス(ヘリウム、ネオン、アルゴン等)で置換して、非酸素雰囲気に保持することが好ましい。なお、酸素ガスは含まれていない方が望ましいが、一部残存していても良い。
The addition amount of the aminocarboxylic acid ester of the general formula (I) and the reducing agent is preferably 0.1 parts by mass or more of the reducing agent with respect to 100 parts by mass of the amino compound having an ester group represented by the general formula (1). More preferably, it is 0.1 to 5 parts by mass, and further preferably 0.2 to 2 parts by mass. The inside of the closed system is replaced with nitrogen gas, carbon dioxide gas, or inert gas (helium, neon, argon, etc.). Therefore, it is preferable to maintain the atmosphere in a non-oxygen atmosphere. In addition, although it is desirable that oxygen gas is not contained, a part may remain | survive.

密閉系内を不活性ガス等で置換する方法としては、不活性ガスを密閉系内に流通させる方法、密閉系内を脱気した後、不活性ガスを入れる等を適用できる。なお、保存時において、密閉系内に不活性ガスが常に満たされるように、常時微量の不活性ガス等を流したり、系内を加圧雰囲気にして外気の侵入を防止することが好ましい。   As a method of replacing the inside of the closed system with an inert gas or the like, a method of circulating an inert gas in the closed system, or a method of putting an inert gas after degassing the inside of the closed system can be applied. During storage, it is preferable to always flow a small amount of inert gas or the like so that the closed system is always filled with the inert gas, or to prevent the entry of outside air by making the system a pressurized atmosphere.

保存時の温度は特に限定されるものではないが、0〜100℃の範囲が好ましく、より好ましくは5〜80℃の範囲がより好ましい。   Although the temperature at the time of a preservation | save is not specifically limited, The range of 0-100 degreeC is preferable, More preferably, the range of 5-80 degreeC is more preferable.

<一般式(1)で表されるアミノカルボン酸エステル含有物品>
一般式(1)で表されるアミノカルボン酸エステル含有物品は、一般式(1)で表されるアミノカルボン酸エステルを100質量部と、上記したリン系の還元剤又は硫黄系の還元剤を0.1質量部以上が容器内に共存しているものである。
<Aminocarboxylic acid ester-containing article represented by the general formula (1)>
The aminocarboxylic acid ester-containing article represented by the general formula (1) includes 100 parts by mass of the aminocarboxylic acid ester represented by the general formula (1) and the above-described phosphorus-based reducing agent or sulfur-based reducing agent. 0.1 parts by mass or more coexist in the container.

還元剤の量は、一般式(1)で表されるアミのカルボン酸エステル100質量部に対して、好ましくは0.1〜5質量部、より好ましくは0.2〜2質量部である。   The amount of the reducing agent is preferably 0.1 to 5 parts by mass, more preferably 0.2 to 2 parts by mass with respect to 100 parts by mass of the carboxylic acid ester of amino represented by the general formula (1).

各発明を適用する一般式(1)のアミノカルボン酸エステルは、界面活性剤の原料(製造中間体)等として用いることができる。   The aminocarboxylic acid ester of the general formula (1) to which each invention is applied can be used as a raw material (production intermediate) of a surfactant or the like.

例えば、一般式(1)で示されるN,N-ジ置換アミノ酸エステルを場合によっては触媒を利用して1級アミンと反応させる手法等を用いることにより、特許文献4に記載されるアミン等を色相良好な状態で得ることができる。   For example, by using a method in which the N, N-disubstituted amino acid ester represented by the general formula (1) is reacted with a primary amine using a catalyst in some cases, the amine described in Patent Document 4 can be obtained. It can be obtained with a good hue.

更に、一般式(1)で表されるN,N-ジ置換アミノ酸エステルに対して加水分解等を行うことにより、色相の良好なN,N-ジ置換アミノ酸を得ることもできる。N,N-ジ置換アミノ酸を1級アミンと反応させる手法等を用いることにより、色相良好なアミン等を得ることができる。   Furthermore, by performing hydrolysis or the like on the N, N-disubstituted amino acid ester represented by the general formula (1), an N, N-disubstituted amino acid having a good hue can be obtained. By using a method of reacting an N, N-disubstituted amino acid with a primary amine, an amine having a good hue can be obtained.

(色相評価法)
ガードナー比色法(Gの後に数字を添えて示す)及びAPHA比色法(APHAの後に数字を添えて示す)を用いた。色相は、それぞれ数字の小さい方が良好(着色の程度が小さいことを示す。)である。G1とAPHA200がほぼ同等である。
(Hue evaluation method)
The Gardner colorimetric method (G followed by a number) and the APHA colorimetric method (APHA followed by a number) were used. The smaller the number, the better the hue (indicating that the degree of coloring is small). G1 and APHA200 are almost equivalent.

実施例1
保存する基剤として、N,N−ジエチルグリシンエチル(以下「化合物1」と略記)10gをガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として亜リン酸を0.1g入れ、攪拌混合した後、蓋をして密閉した状態で40℃で保存した。色相評価結果を表1に示す。
Example 1
As a base to be preserved, 10 g of N, N-diethylglycine ethyl (hereinafter abbreviated as “Compound 1”) is placed in a glass lidded bottle (capacity 20 ml), 0.1 g of phosphorous acid is added as a reducing agent, and stirred. After mixing, it was stored at 40 ° C. in a sealed state with a lid. The hue evaluation results are shown in Table 1.

実施例2〜5
保存する基剤として、化合物1(10g)をガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として表1に示すような化合物を0.1g入れ、攪拌混合した後、蓋をして密閉した状態で40℃で保存した。色相評価結果を表1に示す。
Examples 2-5
As a base to be preserved, compound 1 (10 g) is placed in a glass lidded bottle (capacity 20 ml), 0.1 g of a compound as shown in Table 1 is added as a reducing agent, stirred and mixed, and then capped. Stored at 40 ° C. in a sealed state. The hue evaluation results are shown in Table 1.

実施例6
保存する基剤として、化合物1(10g)をガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として亜リン酸ジエチルを0.1g入れ、窒素をガラス製の瓶内に流通させて置換したうえ密栓し、攪拌混合して40℃で保存した。色相評価結果を表1に示す。
Example 6
As a base to be preserved, compound 1 (10 g) is placed in a glass lidded bottle (capacity 20 ml), 0.1 g of diethyl phosphite is added as a reducing agent, and nitrogen is passed through the glass bottle for replacement. After sealing, the mixture was stirred and mixed and stored at 40 ° C. The hue evaluation results are shown in Table 1.

実施例7
保存する基剤として、N,N−ジエチルグリシンメチル(以下「化合物2」と略記)10gをガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として亜硫酸ナトリウムを0.1g入れ、攪拌混合した後、蓋をして密閉した状態で40℃で保存した。色相評価結果を表1に示す。
Example 7
As a base to be preserved, 10 g of N, N-diethylglycine methyl (hereinafter abbreviated as “Compound 2”) is placed in a glass lidded bottle (capacity 20 ml), 0.1 g of sodium sulfite is added as a reducing agent, and stirred and mixed. Then, it was stored at 40 ° C. in a sealed state with a lid. The hue evaluation results are shown in Table 1.

実施例8
保存する基剤として、化合物2(10g)をガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として亜リン酸ジエチルを0.1g入れ、攪拌混合した後、蓋を開けて空気を流通させながら30℃で保存した。色相評価結果を表1に示す。
Example 8
Compound 2 (10 g) as a base to be stored is placed in a glass lidded bottle (capacity 20 ml), 0.1 g of diethyl phosphite is added as a reducing agent, and after stirring and mixing, the lid is opened and air is circulated. And stored at 30 ° C. The hue evaluation results are shown in Table 1.

比較例1〜2
保存する基剤として、化合物1〜2の各10gをそれぞれガラス製の蓋付き瓶(容量20ml)に入れ、還元剤を添加しないで蓋をして密閉した状態で40℃で保存した。色相評価結果を表1に示す。
Comparative Examples 1-2
As a base to be preserved, 10 g of each of the compounds 1 and 2 was placed in a glass lidded bottle (capacity 20 ml) and stored at 40 ° C. in a sealed state without adding a reducing agent. The hue evaluation results are shown in Table 1.

比較例3
保存する基剤として、化合物2(10g)をそれぞれガラス製の蓋付き瓶(容量20ml)に入れ、還元剤を添加せず、蓋を開けて空気を流通させながら30℃で保存した。色相評価結果を表1に示す。
Comparative Example 3
As a base to be preserved, each compound 2 (10 g) was placed in a glass lidded bottle (capacity 20 ml) and stored at 30 ° C. without adding a reducing agent, with the lid open and air flowing. The hue evaluation results are shown in Table 1.

比較例4
保存する基剤として、アニリン(以下「化合物3」と略記)10gをガラス製の蓋付き瓶(容量20ml)に入れ、還元剤を添加せずに蓋をして40℃で保存した。色相評価結果を表1に示す。
Comparative Example 4
As a base to be preserved, 10 g of aniline (hereinafter abbreviated as “compound 3”) was placed in a glass lidded bottle (capacity 20 ml), capped without adding a reducing agent, and stored at 40 ° C. The hue evaluation results are shown in Table 1.

比較例5
保存する基剤として、化合物3(10g)をガラス製の蓋付き瓶(容量20ml)に入れ、還元剤として亜リン酸ジエチルを0.1g添加し、攪拌混合した後、蓋をして40℃で保存した。色相評価結果を表1に示す。
Comparative Example 5
As a base to be preserved, compound 3 (10 g) was placed in a glass lidded bottle (capacity 20 ml), 0.1 g of diethyl phosphite was added as a reducing agent, stirred and mixed, then capped and sealed at 40 ° C. Saved with. The hue evaluation results are shown in Table 1.

Figure 2006137671
Figure 2006137671

実施例1〜6と比較例1は、初期色相は同等であったが、7日後には顕著な差が生じており、実施例7と比較例2との対比からも同じ結果が得られた。また、窒素置換した実施例6は、色相の低下が無かった。更に実施例8と比較例3との対比から、空気流通下においても還元剤の有無により色相に有意な差が生じた。

Examples 1 to 6 and Comparative Example 1 had the same initial hue, but a significant difference occurred after 7 days. The same result was obtained from the comparison between Example 7 and Comparative Example 2. . Further, in Example 6 in which nitrogen substitution was performed, there was no decrease in hue. Further, from the comparison between Example 8 and Comparative Example 3, there was a significant difference in hue depending on the presence or absence of a reducing agent even under air circulation.

Claims (8)

下記一般式(1):
Figure 2006137671
〔式中、
、Rは、無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基、炭素数1〜5の直鎖もしくは分岐鎖のアルケニル基、又は炭素数1〜5の直鎖もしくは分岐鎖のヒドロキシアルキル基を示し、RとRは結合して環を形成してもよい;
は、水素又は無置換もしくは置換されていてもよい炭素数1〜5の直鎖もしくは分岐鎖のアルキル基、炭素数1〜5の直鎖もしくは分岐鎖のアルケニル基、又は炭素数1〜5の直鎖もしくは分岐鎖のヒドロキシアルキル基を示す;
4は、無置換もしくは置換されていてもよい炭素数1〜10の直鎖もしくは分岐鎖のアルキル基、又は無置換もしくは置換されていてもよい炭素数1〜10の直鎖もしくは分岐鎖のアルケニル基で表される基を示す。〕
で表されるアミノカルボン酸エステルとリン系の還元剤又は硫黄系の還元剤を共存させるアミノカルボン酸エステルの保存方法。
The following general formula (1):
Figure 2006137671
[Where,
R 1 and R 2 are each an unsubstituted or optionally substituted linear or branched alkyl group having 1 to 5 carbon atoms, a linear or branched alkenyl group having 1 to 5 carbon atoms, or a carbon number of 1 Represents a linear or branched hydroxyalkyl group of ˜5, R 1 and R 2 may combine to form a ring;
R 3 is hydrogen, an unsubstituted or optionally substituted linear or branched alkyl group having 1 to 5 carbon atoms, a linear or branched alkenyl group having 1 to 5 carbon atoms, or a carbon number of 1 to 5 5 represents a linear or branched hydroxyalkyl group;
R 4 is a linear or branched alkyl group having 1 to 10 carbon atoms which may be unsubstituted or substituted, or a linear or branched chain having 1 to 10 carbon atoms which may be unsubstituted or substituted. A group represented by an alkenyl group is shown. ]
A method for preserving an aminocarboxylic acid ester in which an aminocarboxylic acid ester represented by the formula (1) is combined with a phosphorus-based reducing agent or a sulfur-based reducing agent.
アミノカルボン酸エステルとリン系の還元剤又は硫黄系の還元剤を密閉系内で共存させる請求項1記載のアミノカルボン酸エステルの保存方法。   The method for preserving an aminocarboxylic acid ester according to claim 1, wherein the aminocarboxylic acid ester and a phosphorus-based reducing agent or a sulfur-based reducing agent are allowed to coexist in a closed system. 密閉系内を非酸素雰囲気に維持する、請求項2記載のアミノカルボン酸エステルの保存方法。   The method for preserving an aminocarboxylic acid ester according to claim 2, wherein the inside of the closed system is maintained in a non-oxygen atmosphere. リン系の還元剤が、亜リン酸、次亜リン酸、亜リン酸塩、次亜リン酸塩、亜リン酸エステル、次亜リン酸エステルから選ばれる少なくとも1種である請求項1〜3のいずれかに記載のアミノカルボン酸エステルの保存方法。   The phosphorus-based reducing agent is at least one selected from phosphorous acid, hypophosphorous acid, phosphite, hypophosphite, phosphite, and hypophosphite. The storage method of the aminocarboxylic acid ester in any one of. リン系の還元剤が、亜リン酸エステルである請求項1〜3のいずれかに記載のアミノカルボン酸エステルの保存方法。   The method for preserving an aminocarboxylic acid ester according to any one of claims 1 to 3, wherein the phosphorus-based reducing agent is a phosphite. 硫黄系の還元剤が、亜硫酸、次亜硫酸、亜硫酸塩、次亜硫酸塩、亜硫酸エステル、次亜硫酸エステルから選ばれる少なくとも1種である請求項1〜5のいずれかに記載のアミノカルボン酸エステルの保存方法。   The storage of an aminocarboxylic acid ester according to any one of claims 1 to 5, wherein the sulfur-based reducing agent is at least one selected from sulfurous acid, hyposulfite, sulfite, hyposulfite, sulfite, and hyposulfite. Method. 請求項1記載の一般式(1)で表されるアミノカルボン酸エステルを100質量部と、請求項1〜6に記載のリン系の還元剤又は硫黄系の還元剤を0.1質量部以上共存させることにより、一般式(1)で表されるアミノカルボン酸エステルの色相劣化を抑制する方法。   100 parts by mass of the aminocarboxylic acid ester represented by the general formula (1) according to claim 1, and 0.1 parts by mass or more of the phosphorus-based reducing agent or the sulfur-based reducing agent according to claim 1-6. A method of suppressing hue deterioration of the aminocarboxylic acid ester represented by the general formula (1) by coexisting. 請求項1記載の一般式(1)で表されるアミノカルボン酸エステルを100質量部と、請求項1〜6に記載のリン系の還元剤又は硫黄系の還元剤を0.1質量部以上含有する、色相劣化が抑制された一般式(1)で表されるアミノカルボン酸エステル含有物品。   100 parts by mass of the aminocarboxylic acid ester represented by the general formula (1) according to claim 1, and 0.1 parts by mass or more of the phosphorus-based reducing agent or the sulfur-based reducing agent according to claim 1-6. An aminocarboxylic acid ester-containing article represented by the general formula (1) containing hue deterioration that is contained.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49102831A (en) * 1973-02-12 1974-09-28
JPS63170341A (en) * 1986-12-24 1988-07-14 チバーガイギー アクチエンゲゼルシヤフト N, n-bis(hydroxyethyl) hydroxylamine ester and stabilizing composition containing the same
JPH02306946A (en) * 1989-05-22 1990-12-20 Mitsui Toatsu Chem Inc Method for preventing discoloration of glycine
JPH05246962A (en) * 1992-03-02 1993-09-24 Ajinomoto Co Inc Deodorization of aqueous solution containing basic amino acid or its salt
JPH11500451A (en) * 1995-11-02 1999-01-12 ザ、プロクター、エンド、ギャンブル、カンパニー Β-amino ester compound of perfume alcohol
JP2000072730A (en) * 1998-08-31 2000-03-07 Lion Corp Surfactant composition containing n-substituted-beta- alanine or its salt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49102831A (en) * 1973-02-12 1974-09-28
JPS63170341A (en) * 1986-12-24 1988-07-14 チバーガイギー アクチエンゲゼルシヤフト N, n-bis(hydroxyethyl) hydroxylamine ester and stabilizing composition containing the same
JPH02306946A (en) * 1989-05-22 1990-12-20 Mitsui Toatsu Chem Inc Method for preventing discoloration of glycine
JPH05246962A (en) * 1992-03-02 1993-09-24 Ajinomoto Co Inc Deodorization of aqueous solution containing basic amino acid or its salt
JPH11500451A (en) * 1995-11-02 1999-01-12 ザ、プロクター、エンド、ギャンブル、カンパニー Β-amino ester compound of perfume alcohol
JP2000072730A (en) * 1998-08-31 2000-03-07 Lion Corp Surfactant composition containing n-substituted-beta- alanine or its salt

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