JP2752610B2 - Modified iota carrageenan and method for producing the same - Google Patents

Modified iota carrageenan and method for producing the same

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Publication number
JP2752610B2
JP2752610B2 JP8514997A JP8514997A JP2752610B2 JP 2752610 B2 JP2752610 B2 JP 2752610B2 JP 8514997 A JP8514997 A JP 8514997A JP 8514997 A JP8514997 A JP 8514997A JP 2752610 B2 JP2752610 B2 JP 2752610B2
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Japan
Prior art keywords
toothpaste
carrageenan
viscosity
iota
modified
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JP8514997A
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Japanese (ja)
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JPH1025302A (en
Inventor
弘文 二宮
和美 杉林
晶二 鈴木
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Mitsubishi Rayon Co Ltd
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Mitsubishi Rayon Co Ltd
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Description

【発明の詳細な説明】 【0001】 【発明の属する技術分野】本発明は、練歯磨用安定化剤
として好適に用いられる変性イオタカラギーナン、およ
びその製造方法に関する。 【0002】 【従来の技術】カラギーナンは紅藻類から抽出し精製し
たガラクトース硫酸エステルを主成分とする水溶性天然
多糖類であり、その分子構造の違いからカッパ、ラムダ
およびイオタの3種に大別され、イオタカラギーナンは
主にユーキューマスピノサム(Eucheuma Sp
inosum)から抽出し、精製される。 【0003】一般にイオタカラギーナンの抽出に用いる
ユーキューマスピノサムはその海藻の処理方法により3
種に大別される。すなわち、海から採取した海藻を天日
で乾燥しただけのロースピノサム(Raw Spino
sum)、海藻を70〜95℃で30〜120分間3〜
10%水酸化カリウム水溶液で処理し、固形分を回収し
て水洗後乾燥したプリトリーテッドスピノサム(Pre
treated Spinosum)、および海藻を4
0〜60℃で0.5〜2.0%水酸化カリウム水溶液で
処理し固形分を回収して水洗後乾燥したセミトリーテッ
ドスピノサム(Semitreated Spinos
um)の3種である。 【0004】従来、いずれのユーキューマスピノサムを
用いても公知の精製方法、すなわち「海藻を水洗した
後、加熱溶解し、次いで未溶解物を除去した後、水混和
性有機溶剤との混合によりカラギーナンを析出させ、析
出物質を回収し、乾燥、粉砕する。」で得られる純粋な
イオタカラギーナンは1.5%水溶液の75℃粘度が5
0乃至300cpsである。 【0005】イオタカラギーナンの変性についてはこれ
までにいくつかの報告がされている。USP3,34
2,612にはユーキューマスピノサムの加熱溶解時に
水酸化カルシウムを乾燥原藻に対し3.7%−7%添加
してpHを10.2−11.2とし、90℃−100℃
で45分乃至4時間、好ましくは1乃至2時間反応させ
た後、公知の方法で変性イオタカラギーナンを製造する
方法が記載されている。この方法はガラクトースに対す
るアンヒドロガラクトースの割合を向上させ、カルシウ
ム反応性を増大し、ゲル強度の向上を目的としたもので
あり、当然のことながら分子量低下は好ましくなく、で
きるだけ分子切断が起こらないアルカリ処理条件を採用
している。この方法によるユーキューマスピノサムの変
性抽出物の1.5%水溶液の75℃粘度も40cpsよ
り高いものである。 【0006】USP3,849,395には、冷ミルク
への溶解性の向上を目的にUSP3,342,612と
同等なアルカリ処理を行い、次いで酸加水分解により分
子切断を実施した後、公知の方法で変性イオタカラギー
ナンを製造する方法が記載されており、1.5%水溶液
の75℃粘度が0.4乃至4.0cpsと規定されてい
る。 【0007】ところで、練歯磨の品質安定化剤は、その
粘度と特異な流動性の為に、練歯磨のレオロジカルな性
質の決定に大きな影響を与えるものであり、強い粘りを
出し、研磨剤と液体成分の分離を防ぎ練歯磨の形・固さ
を保つと共に、口内で滑らかな触感を与えるという役割
を持つ。イオタカラギーナンはカッパカラギーナンやラ
ムダカラギーナンに比べてこれらの役割に優れている。 【0008】 【発明が解決しようとする課題】しかし、公知の方法で
ユーキューマスピノサムより抽出したイオタカラギーナ
ンおよびUSP3,342,612に従ったアルカリ処
理を実施した変性イオタカラギーナンを練歯磨の品質安
定化剤として使用した場合、練歯磨の粘り・固さが当初
は良好なものの、経時的に増大し、練歯磨のある時間経
過後は粘りや固さが高くなりすぎ、実質上使用困難であ
ることが判明した。 【0009】1.5%75℃粘度が0.4〜4.0cp
sのように低い変性イオタカラギーナンは練歯磨の品質
安定化剤として使用した場合、練歯磨の形・固さを保つ
ことができず、実質上練歯磨の品質安定化剤としては用
い得ないものである。 【0010】そこで練歯磨の品質安定化剤としての役割
を維持しつつ、練歯磨の粘り・固さに経時的な安定性を
も付与できるイオタカラギーナンが望まれた。 【0011】 【課題を解決するための手段】本発明者らは鋭意検討の
結果イオタカラギーナンの有している物性の中でその水
溶液粘度が練歯磨の経時安定性に関与していることをつ
きとめ、本発明に至った。 【0012】すなわち、本発明の要旨は1.5%水溶液
の75℃粘度が5乃至40cpsである変性イオタカラ
ギーナンにある。 【0013】1.5%水溶液の75℃粘度が40cps
を超えるイオタカラギーナンあるいは変性イオタカラギ
ーナンはこれを練歯磨の品質安定化剤として用いた場
合、製造当初の練歯磨は適度の粘性を示し、研磨剤と液
体成分の分離もなく、練歯磨の形状が保たれるが、後述
の実施例の加速テストの結果から明らかなように経時的
に練歯磨の粘度が上昇し、37cpsを超えるという好
ましくない程高い粘度となってしまう。 【0014】一方、1.5%水溶液の75℃粘度が5c
ps未満のイオタカラギーナンはこれを練歯磨の品質安
定化剤として用いた場合得られる練歯磨は粘りと固さが
不足して練歯磨の品質安定化剤として不適切である。 【0015】本発明のイオタカラギーナンはその一部を
ラムダカラギーナンにかえてもよいが、その場合はイオ
タカラギーナンとラムダカラギーナンの比を1/4以上
とする必要がある。このような比率であれば本発明のイ
オタカラギーナン単独の場合とほぼ同様の練歯磨の品質
安定化効果を有する。 【0016】本発明の変性イオタカラギーナンはユーキ
ューマスピノサムからのカラギーナンを抽出した抽出液
の状態で加水分解を行えばよい。この加水分解はアルカ
リ加水分解でも酸加水分解でもよく、酸化剤による加水
分解でも酵素あるいは微生物による加水分解でもよい。 【0017】又、加水分解を一定の条件で行っても使用
する原料の種類、その状態によっても得られる変性イオ
タカラギーナンの粘度が異なってくるので加水分解条件
を一概に規定できないが、使用原料採用加水分解条件等
を勘案して加水分解時の液粘度を参考にして所定の粘度
の変性イオタカラギーナンを得ることができる。 【0018】次に本発明の練歯磨について説明する。 【0019】練歯磨には研磨剤成分と湿潤剤と発泡剤と
水及び必要に応じて防腐剤、甘味剤、香料、着色料が含
まれこれに粘結剤(本発明でいう品質安定剤)が加えら
れてなるものであり、本発明の練歯磨においては品質安
定化剤として先に説明した変性イオタカラギーナン又は
この一部をラムダカラギーナンに置換したものを用いれ
ばその他の成分としては通常練歯磨に用いられる成分を
通常用いられる比率で用いればよい。即ち研磨剤成分と
しては第二燐酸カルシウム、炭酸カルシウム、水酸化ア
ルミニウム、酸化アルミニウム、水酸化マグネシウムを
例示でき、これらを混合して用いることもできる。 【0020】湿潤剤としてはグリセリン、プロピレング
リコール、ソルビトール等を、発泡剤としてはラウリル
硫酸ナトリウム、脂肪酸モノグリセライドナトリウム等
を、防腐剤としては安息香酸ナトリウム、パラヒドロキ
シ安息香酸ナトリウム等を例示でき、甘味剤としてはサ
ッカリンナトリウムを例示できる。練歯磨に添加する品
質安定化剤は水も含めた全練歯磨組成の0.5〜2.0
wt%であることが好ましい。 【0021】本発明の練歯磨は25℃における粘度が2
2〜37cpsという好ましい範囲に長期にわたって維
持でき、経時変化が少ないという特徴を有する。 【0022】 【実施例】以下に実施例及び比較例を用いて本発明を説
明する。 【0023】なお実施例、比較例で製造した練歯磨の組
成は全て第1表に示した組成のものとした。 【0024】 【表1】 また、練歯磨の粘り、固さの経時的な変化は下記の様に
加速テストを実施し評価した。 【0025】練歯磨を調整後、アルミチューブ2本に充
填し、1本は25℃恒温槽に24時間放置した後練歯磨
の粘度(25℃)を測定した。また、他の一本は50℃
恒温槽に3週間放置した後、25℃恒温槽に24時間放
置した後の練歯磨の25℃における粘度を測定した。こ
の2点の粘度変化より経時的な安定性の評価を実施し
た。 【0026】尚、25℃での練歯磨粘度およびイオタカ
ラギーナン1.5%水溶液の75℃粘度は共に、BL型
粘度計(東機産業製)で測定した値である。 【0027】又、練歯磨の特性は研磨剤と液体成分との
分離の有無、チューブからの押出し易さ、口腔内での感
触で判断した。 【0028】従って後述の第2表の特性欄の良とは研磨
剤と液体成分との分離がなく、チューブからの押出しも
容易で口内での感触も良好であることを示す。 【0029】[実施例1]ロースピノサム1.5kgを
水洗した後全量が約30kgになるように水を加え、8
0℃で1時間加熱溶解した。この液の10kgをとりこ
れに水酸化ナトリウム100gを添加して(pH12.
1)3時間加水分解処理した後、塩酸で中和し、これに
濾過助剤を添加し、ケーキ濾過にて得られた清澄液に3
倍量のイソプロピルアルコールを加えて、イオタカラギ
ーナンを沈殿させ回収した。この沈殿物を乾燥粉砕して
イオタカラギーナンの粉末を得た。このイオタカラギー
ナンの1.5%水溶液の75℃粘度は17cpsであっ
た。この変性イオタカラギーナンを品質安定化剤として
練歯磨を製造し、経時的な練歯磨粘度の変化と練歯磨の
特性を調べた。その結果を第2表に示す。 【0030】[比較例1]実施例1で得たロースピノサ
ム溶解液の10kgをとり、これを加水分解処理及びそ
の後の中和処理を行わない以外は実施例1と同様にして
イオタカラギーナンの粉末を得た。このイオタカラギー
ナンの1.5%水溶液の75℃における粘度は78cp
sであった。これを品質安定化剤として用いた練歯磨の
経時粘度変化を調べた。その結果を第2表に示す。 【0031】この練歯磨は25℃24時間経過後は実施
例1で得た練歯磨と同様良好なものであったが50℃3
週間、次いで25℃24時間放置後のものは硬すぎて力
を入れてもチューブから押出し難く、無理に押出して使
用したところ口内での感触は滑らかさがなく不良であっ
た。 【0032】[比較例2]溶液の加水分解処理条件とし
て水酸化ナトリウムの添加量を50gとした(pH1
1.0)以外は実施例1と同様にして変性イオタカラギ
ーナン粉末を得た。この変性イオタカラギーナン1.5
%水溶液の75℃における粘度は42cpsであった。 【0033】これを用いた練歯磨の経時安定性と練歯磨
特性の評価結果を第2表に示す。 【0034】[実施例2]ロースピノサムの代りにセミ
トリーテッドスピノサムを用いた以外は実施例1と同様
にして変性イオタカラギーナン粉末を得た。この1.5
%水溶液の75℃における粘度は33cpsであった。
これを用いた練歯磨の経時安定性と特性を第2表に示
す。 【0035】[比較例3]実施例2で用いたと同様のセ
ミトリーテッドスピノサムを用い、加水分解及びその後
の中和を行わない以外は実施例2と同様にしてイオタカ
ラギーナン粉末を得た。 【0036】この1.5%水溶液の75℃における粘度
は280cpsであった。 【0037】[比較例4]実施例2で用いたと同様のセ
ミトリーテッドスピノサムを用い、加水分解処理時間を
1時間にした以外は実施例2と同様にして変性イオタカ
ラギーナン粉末を得た。 【0038】この1.5%水溶液の75℃での粘度は1
20cpsであった。 【0039】[比較例5]実施例2で用いたと同様のセ
ミトリーテッドスピノサムを用い加水分解処理時間を2
時間にした以外は実施例2と同様にして1.5%水溶液
の75℃との粘度が64cpsの変性イオタカラギーナ
ン粉末を得た。 【0040】比較例3〜5のイオタカラギーナンあるい
は変性イオタカラギーナンを用いて各々練歯磨を作成し
粘度の経時変化を調べた。その結果を第2表に示す。 【0041】[実施例3]ロースピノサムの代りにプレ
トリーテッドスピノサムを用い、加水分解処理条件とし
て次亜塩素酸ナトリウム(有効塩素12%)70gを添
加して30分処理を採用し中和を行わない以外は実施例
1と同様にして1.5%水溶液の75℃での粘度が12
cpsの変性イオタカラギーナン粉末を得た。 【0042】これを品質安定化剤に用いて練歯磨を製造
し練歯磨の経時的粘度変化を調べた。その結果を第2表
に示す。 【0043】[比較例6]実施例3で用いたと同様のプ
レトリーテッドスピノサムを用い加水分解を行わない以
外は実施例3と同様にしてイオタカラギーナン粉末を
得、これを用いて練歯磨を得た。その粘度の経時変化の
結果を第2表に示す。 【0044】なおこのイオタカラギーナンの1.5%水
溶液の75℃での粘度は95cpsであった。 【0045】[比較例7]実施例3で用いたと同様のプ
レトリーテッドスピノサムを用い次亜塩素酸ナトリウム
の添加量を100gとした以外は実施例3と同様にして
1.5%水溶液の75℃での粘度3.5cpsの変性イ
オタカラギーナンを得、これを用いて練歯磨を作成し、
その粘度の経時変化の結果を第2表に示す。 【0046】この練歯磨は25℃で24時間保持した後
のものも既に研磨剤と液体成分とが分離した不良品とな
っていた。 【0047】[実施例4,5]比較例1と同様の処理を
した時に得られるイオタカラギーナンの1.5%水溶液
の75℃での粘度が102cpsとなるようなプレトリ
ーテッドスピノサムを用い、加水分解条件として酢酸を
添加してpHを5.0(実施例4)及び4.5(実施例
5)に調節し、その液を90℃で2時間維持し、次いで
水酸化ナトリウムで中和するという条件を採用した以外
は実施例1と同様にして変性イオタカラギーナン(1.
5%水溶液の75℃での粘度 実施例4:10cp
s、実施例5:6.0cps)粉末を得た。 【0048】これらの変性イオタカラギーナンを用いて
練歯磨を作成した。 【0049】その粘度の経時変化及び特性を第2表に示
す。 【0050】[比較例8]加水分解を行わない以外は実
施例4と同様にして得た1.5%水溶液の75℃での粘
度102cpsのイオタカラギーナンを用い練歯磨を作
成し、その特性を調べた。その結果を第2表に示す。 【0051】[実施例6,7、比較例9]実施例4,5
及び比較例8で得た(変性)イオタカラギーナンと、ギ
ガルテーナ・スコツツベルギー(Gigartina
Scottsbergii)を用いた以外は比較例1と
同様にして抽出精製したラムダカラギーナンとを重量比
1:1で用いてこれを品質安定化剤として練歯磨を作成
し、その粘度経時変化と練歯磨特性を調べた。その結果
を第2表に示す。 【0052】[比較例10]USP3,342,612
に従い変性イオタカラギーナンを製造した。即ち、ロー
スピノサム、セミトリーテッドスピノサムおよびプレト
リーテッドスピノサムの原藻を各々1.5kgずつ水洗
した後、各々全量が30kgになるように水を加え、水
酸化ナトリウムを乾燥原藻に対し7.0%添加した。次
に95℃で2時間処理した後、塩酸にて中和し、以下、
比較例1と同等に処理し変性イオタカラギーナンの粉末
を得た。それぞれの原藻より得られた粉末製品の1.5
%水溶液の75℃粘度は45cps、84cpsおよび
60cpsであった。 【0053】それぞれの変性イオタカラギーナンを品質
安定化剤として練歯磨を製造し、経時的な練歯磨の粘度
変化と練歯磨特性を調べた。その結果を第2表に示す。 【0054】[比較例11]USP3,849,395
に従い、変性イオタカラギーナンを製造した。即ちロー
スピノサム、セミトリーテッドスピノサム、プレトリー
テッドスピノサムの原藻を各々比較例10と同様にして
抽出、アルカリ処理を行った後塩酸にて中和した抽出液
に各々酢酸を添加し、pHを4.0に調整し、90℃で
2時間処理した後水酸化ナトリウムで中和し、以下、比
較例10と同様な方法で各々の変性イオタカラギーナン
の粉末を得た。1.5%水溶液の75℃粘度は、1.
5,3.0および2.0cpsであった。 【0055】各々の変性イオタカラギーナンを品質安定
化剤として練歯磨を製造したが、いずれの練歯磨も、粘
りおよび固さがなく、本比較例で製造したいずれの変性
イオタカラギーナンも練歯磨の品質安定化剤として不適
切であった。 【0056】尚、練歯磨の粘度は第2表に示す。 【0057】 【表2】 【0058】 【表3】 *1 粘度:1.5%水溶液の75℃における粘度 *2 粘り、固さが不足し、研磨剤と液体成分の分離
が見られた。 *3 固すぎてチューブから押出せないあるいは押出
すのが困難であり口内での触感が不良であった。 【0059】 【発明の効果】以上の実施例および比較例から明らかな
ように、1.5%水溶液の75℃粘度が5乃至40cp
sである変性イオタカラギーナンは、単独にあるいはラ
ムダカラギーナンとの組合わせで練歯磨の品質安定化剤
として用いることにより、本来イオタカラギーナンが有
している優れた特性(研磨剤と液体成分の分離防止、口
内での滑らかな触感)を維持しながら、従来の問題点で
あった経時的に練歯磨の粘性が増大し、固くなるという
欠点を解消する、優れた効果を有しており、これを品質
安定化剤として用いた練歯磨は長期間にわたってその当
初の優れた特性を維持できるという特徴を有する。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modified iota carrageenan suitably used as a toothpaste stabilizer, and a method for producing the same. [0002] Carrageenan is a water-soluble natural polysaccharide whose main component is galactose sulfate extracted and purified from red algae. Carrageenan is roughly classified into three types, kappa, lambda and iota, depending on the molecular structure. And Iota Carrageenan is mainly based on Eucheuma Spinosum.
inosum) and purified. [0003] In general, eukyuma spinosum used for the extraction of iota carrageenan depends on the method of treating the seaweed.
They are roughly classified into species. That is, raw spinach (raw spinosum) obtained by simply drying seaweed collected from the sea in the sun.
sum), seaweed at 70-95 ° C for 30-120 minutes for 3-
A pretreated spinosum (Pre) treated with a 10% aqueous solution of potassium hydroxide to recover solids, washed with water and dried
treated spinosum) and seaweed in 4
A semi-treated spinosum (Semitreated Spinosum) treated with a 0.5 to 2.0% aqueous potassium hydroxide solution at 0 to 60 ° C to collect solids, washed with water and dried.
um). Conventionally, any of the eukuma spinosams can be purified by a known purification method, that is, washing the seaweed with water, heating and dissolving it, removing the undissolved matter, and then mixing with a water-miscible organic solvent. The carrageenan is precipitated, and the precipitated substance is recovered, dried and pulverized. "
0 to 300 cps. There have been several reports on the modification of iota carrageenan. USP3,34
At 2,612, calcium hydroxide was added at 3.7% to 7% to the dry original alga at the time of heating and dissolving Eucuma spinosam to adjust the pH to 10.2 to 11.2, and 90 ° C to 100 ° C.
For 45 minutes to 4 hours, preferably 1 to 2 hours, and then producing a modified iota carrageenan by a known method. This method aims at increasing the ratio of anhydrogalactose to galactose, increasing calcium reactivity, and improving gel strength. Naturally, reduction in molecular weight is not preferable, and alkali which does not cause molecular cleavage as much as possible Processing conditions are adopted. The 75 ° C. viscosity of a 1.5% aqueous solution of the modified extract of Eucuma spinosam according to this method is also higher than 40 cps. [0006] USP 3,849,395 is subjected to an alkali treatment equivalent to that of USP 3,342,612 for the purpose of improving solubility in cold milk, followed by molecular cleavage by acid hydrolysis, followed by a known method. Describes a method for producing a modified iota carrageenan, wherein the viscosity of a 1.5% aqueous solution at 75 ° C. is specified to be 0.4 to 4.0 cps. [0007] By the way, the quality stabilizer of toothpaste has a great influence on the determination of the rheological properties of toothpaste because of its viscosity and peculiar fluidity. It has the role of preventing the separation of liquid and liquid components, keeping the shape and hardness of the toothpaste and giving a smooth tactile sensation in the mouth. Iota carrageenan excels in these roles compared to kappa carrageenan and lambda carrageenan. [0008] However, iota-carrageenan extracted from Eucuma spinosam by a known method and modified iota-carrageenan subjected to an alkali treatment according to US Pat. When used as an agent, the consistency and hardness of toothpaste are good at first, but increase over time, and after a certain period of time the toothpaste becomes too sticky and hard, making it practically difficult to use. It has been found. [0009] 1.5% 75 ° C viscosity is 0.4-4.0 cp
When a modified iota carrageenan such as s is used as a toothpaste quality stabilizer, it cannot maintain the shape and hardness of the toothpaste and cannot be used as a toothpaste quality stabilizer. It is. [0010] Therefore, there has been a demand for iota-carrageenan, which can impart the stability over time to the stickiness and hardness of the toothpaste while maintaining the role of the toothpaste as a quality stabilizer. Means for Solving the Problems The present inventors have conducted intensive studies and found that among the physical properties possessed by iota-carrageenan, the viscosity of the aqueous solution is related to the temporal stability of toothpaste. This has led to the present invention. That is, the gist of the present invention is a modified iota carrageenan having a 1.5% aqueous solution having a viscosity at 75 ° C. of 5 to 40 cps. A 75% viscosity of a 1.5% aqueous solution is 40 cps.
If iota-carrageenan or modified iota-carrageenan is used as a toothpaste quality stabilizer, the toothpaste at the beginning of production will have an appropriate viscosity, no separation of the abrasive and liquid components, and the shape of the toothpaste will be Although it is maintained, the viscosity of the toothpaste increases with time, as is apparent from the results of the acceleration test in the examples described later, and the viscosity becomes undesirably high, exceeding 37 cps. On the other hand, the viscosity of a 1.5% aqueous solution at 75 ° C. is 5c
When iota-carrageenan of less than ps is used as a quality stabilizer for toothpaste, the resulting toothpaste is insufficient in stickiness and hardness and is unsuitable as a quality stabilizer for toothpaste. The iota carrageenan of the present invention may be partially replaced with lambda carrageenan, in which case the ratio of iota carrageenan to lambda carrageenan must be 1/4 or more. With such a ratio, the toothpaste quality stabilizing effect is almost the same as that of the case of iota carrageenan alone of the present invention. The modified iota carrageenan of the present invention may be hydrolyzed in the state of an extract obtained by extracting carrageenan from Eucuma spinosam. This hydrolysis may be alkali hydrolysis or acid hydrolysis, hydrolysis by an oxidizing agent, or hydrolysis by an enzyme or a microorganism. Further, even if the hydrolysis is carried out under a certain condition, the viscosity of the modified iota carrageenan obtained varies depending on the kind of the raw material used and the state thereof, so that the hydrolysis conditions cannot be specified unconditionally. A modified iota carrageenan having a predetermined viscosity can be obtained by referring to the liquid viscosity at the time of hydrolysis in consideration of hydrolysis conditions and the like. Next, the toothpaste of the present invention will be described. Toothpaste contains an abrasive component, a wetting agent, a foaming agent, water and, if necessary, a preservative, a sweetener, a flavor, and a colorant, and further contains a binder (a quality stabilizer in the present invention). In the toothpaste of the present invention, if the above-mentioned modified iota-carrageenan or a part of the modified iota-carrageenan is replaced by lambda-carrageenan as a quality stabilizer, other toothpaste is usually used. The components used in (1) may be used in a ratio generally used. That is, examples of the abrasive component include dibasic calcium phosphate, calcium carbonate, aluminum hydroxide, aluminum oxide, and magnesium hydroxide, and these can be used in combination. Examples of the humectant include glycerin, propylene glycol, and sorbitol; examples of the foaming agent include sodium lauryl sulfate and sodium fatty acid monoglyceride; examples of the preservative include sodium benzoate and sodium parahydroxybenzoate; Examples include saccharin sodium. The quality stabilizer added to the toothpaste is 0.5 to 2.0 of the total toothpaste composition including water.
It is preferably wt%. The toothpaste of the present invention has a viscosity at 25 ° C. of 2
It has a feature that it can be maintained in a preferable range of 2 to 37 cps for a long period of time and there is little change with time. The present invention will be described below with reference to examples and comparative examples. The compositions of the toothpastes produced in Examples and Comparative Examples were all those shown in Table 1. [Table 1] The change over time in the stickiness and hardness of the toothpaste was evaluated by performing an acceleration test as described below. After adjusting the toothpaste, two aluminum tubes were filled, and one of the tubes was left in a thermostat at 25 ° C. for 24 hours, and then the viscosity (25 ° C.) of the toothpaste was measured. Another one is 50 ℃
After being left in a thermostat for 3 weeks, the viscosity of the toothpaste at 25 ° C after being left in a thermostat at 25 ° C for 24 hours was measured. The evaluation of stability over time was carried out from these two changes in viscosity. Both the toothpaste viscosity at 25 ° C. and the 75 ° C. viscosity of a 1.5% aqueous solution of iota carrageenan are values measured by a BL viscometer (manufactured by Toki Sangyo Co., Ltd.). The characteristics of the toothpaste were determined based on the separation of the abrasive and the liquid component, the ease of extrusion from the tube, and the feeling in the oral cavity. Accordingly, "good" in the property column of Table 2 described below means that there is no separation between the abrasive and the liquid component, the extrusion from the tube is easy, and the feel in the mouth is good. Example 1 After washing 1.5 kg of low spinosum with water, water was added so that the total amount became about 30 kg.
The mixture was dissolved by heating at 0 ° C. for 1 hour. Take 10 kg of this solution and add 100 g of sodium hydroxide (pH 12.
1) After hydrolyzing for 3 hours, neutralize with hydrochloric acid, add a filter aid to this, and add 3% to the clear solution obtained by cake filtration.
Iota carrageenan was precipitated and recovered by adding twice the volume of isopropyl alcohol. The precipitate was dried and pulverized to obtain powder of iota carrageenan. The viscosity at 75 ° C. of this 1.5% aqueous solution of iota carrageenan was 17 cps. A toothpaste was manufactured using this modified iota carrageenan as a quality stabilizer, and the change in the toothpaste viscosity with time and the characteristics of the toothpaste were examined. Table 2 shows the results. Comparative Example 1 10 kg of the solution of low spinosum obtained in Example 1 was taken, and the powder of iota-carrageenan was prepared in the same manner as in Example 1 except that the hydrolysis and the subsequent neutralization were not performed. Obtained. The viscosity of this 1.5% aqueous solution of iota carrageenan at 75 ° C. is 78 cp.
s. The change in viscosity over time of toothpaste using this as a quality stabilizer was examined. Table 2 shows the results. This toothpaste was as good as the toothpaste obtained in Example 1 after 24 hours at 25.degree.
After being left for 24 hours at 25 ° C. for a week, it was too hard to extrude from the tube even if force was applied. When it was forcibly extruded and used, the feel in the mouth was not smooth and poor. Comparative Example 2 The amount of sodium hydroxide added was set to 50 g (pH 1)
A modified iota carrageenan powder was obtained in the same manner as in Example 1 except for 1.0). This modified iota carrageenan 1.5
% Aqueous solution at 75 ° C. was 42 cps. Table 2 shows the evaluation results of the aging stability and the toothpaste characteristics of the toothpaste using the toothpaste. Example 2 A modified iota carrageenan powder was obtained in the same manner as in Example 1 except that a semi-treated spinosum was used instead of the low spinosum. This 1.5
% Aqueous solution at 33 ° C. was 33 cps.
Table 2 shows the aging stability and properties of toothpaste using this. Comparative Example 3 An iota-carrageenan powder was obtained in the same manner as in Example 2 except that the same semi-treated spinosum as used in Example 2 was not used and hydrolysis and subsequent neutralization were not performed. The viscosity of the 1.5% aqueous solution at 75 ° C. was 280 cps. Comparative Example 4 A modified iota carrageenan powder was obtained in the same manner as in Example 2 except that the same semi-treated spinosum as used in Example 2 was used and the hydrolysis treatment time was changed to 1 hour. The viscosity of this 1.5% aqueous solution at 75 ° C. is 1
It was 20 cps. Comparative Example 5 Using the same semi-treated spinosum as used in Example 2, the hydrolysis treatment time was 2
A modified iota carrageenan powder having a viscosity of 64 cps at 75 ° C. of a 1.5% aqueous solution was obtained in the same manner as in Example 2 except for changing the time. Toothpastes were prepared using the iota-carrageenan or the modified iota-carrageenan of Comparative Examples 3 to 5, and the time-dependent change in viscosity was examined. Table 2 shows the results. [Example 3] Pretreated spinosum was used in place of low spinosum, and 70 g of sodium hypochlorite (effective chlorine 12%) was added as a hydrolysis treatment condition, and a 30 minute treatment was employed to neutralize. Except when not performed, the viscosity of the 1.5% aqueous solution at 75 ° C. was 12 in the same manner as in Example 1.
A modified iota carrageenan powder of cps was obtained. Using this as a quality stabilizer, toothpaste was manufactured, and the viscosity change of the toothpaste over time was examined. Table 2 shows the results. Comparative Example 6 Iota-carrageenan powder was obtained in the same manner as in Example 3 except that hydrolysis was not performed using the same pretreated spinosum as used in Example 3, and toothpaste was used with this. Obtained. Table 2 shows the results of the time-dependent changes in the viscosity. The viscosity of this 1.5% aqueous solution of iota carrageenan at 75 ° C. was 95 cps. Comparative Example 7 A 1.5% aqueous solution of a 1.5% aqueous solution was prepared in the same manner as in Example 3 except that the same pretreated spinosum as used in Example 3 was used and the amount of sodium hypochlorite added was changed to 100 g. A modified iota carrageenan having a viscosity of 3.5 cps at 75 ° C. was obtained, and a toothpaste was prepared using the modified iota carrageenan.
Table 2 shows the results of the time-dependent changes in the viscosity. This toothpaste after holding at 25 ° C. for 24 hours was already a defective product in which the abrasive and the liquid component were separated. [Examples 4 and 5] A pretreated spinosum having a viscosity at 75 ° C. of a 1.5% aqueous solution of iota-carrageenan obtained at the same treatment as in Comparative Example 1 was 102 cps. The pH was adjusted to 5.0 (Example 4) and 4.5 (Example 5) by the addition of acetic acid as hydrolysis conditions, the solution was maintained at 90 ° C. for 2 hours and then neutralized with sodium hydroxide. The modified iota-carrageenan (1.
Viscosity of 5% aqueous solution at 75 ° C. Example 4: 10 cp
s, Example 5: 6.0 cps). A toothpaste was prepared using these modified iota carrageenans. Table 2 shows the time-dependent changes and characteristics of the viscosity. Comparative Example 8 A toothpaste was prepared using a 1.5% aqueous solution of iota-carrageenan having a viscosity of 102 cps at 75 ° C. at 102 ° C. except that no hydrolysis was carried out. Examined. Table 2 shows the results. Examples 6 and 7 and Comparative Example 9 Examples 4 and 5
And (modified) iota carrageenan obtained in Comparative Example 8 and Gigartena Scotts Belgium (Gigartina).
Lambda carrageenan extracted and purified in the same manner as in Comparative Example 1 except that Scottsbergii) was used at a weight ratio of 1: 1 to prepare a toothpaste as a quality stabilizer. Was examined. Table 2 shows the results. Comparative Example 10 USP 3,342,612
To produce a modified iota carrageenan. That is, after 1.5 kg each of the raw algae of low spinosum, semi-treated spinosum and pretreated spinosum was washed with water, water was added so that the total amount became 30 kg each, and sodium hydroxide was added to the dried raw algae by 7 kg. 0.0% was added. Next, after treatment at 95 ° C. for 2 hours, the mixture was neutralized with hydrochloric acid.
The same treatment as in Comparative Example 1 was performed to obtain a powder of modified iota carrageenan. 1.5 of the powder product obtained from each original algae
The 75 ° C. viscosities of the% aqueous solutions were 45 cps, 84 cps and 60 cps. Toothpastes were prepared using each of the modified iota carrageenans as a quality stabilizer, and the viscosity change of the toothpaste over time and the toothpaste characteristics were examined. Table 2 shows the results. Comparative Example 11 USP 3,849,395
To produce a modified iota carrageenan. That is, raw algae of low spinosum, semi-treated spinosum, and pretreated spinosum were each extracted and alkali-treated in the same manner as in Comparative Example 10, and then acetic acid was added to the extract neutralized with hydrochloric acid, followed by pH adjustment. Was adjusted to 4.0, treated at 90 ° C. for 2 hours, and then neutralized with sodium hydroxide. Thereafter, powders of each modified iota carrageenan were obtained in the same manner as in Comparative Example 10. The 75 ° C. viscosity of the 1.5% aqueous solution is 1.
5, 3.0 and 2.0 cps. A toothpaste was produced using each of the modified iota-carrageenans as a quality stabilizer. However, none of the toothpastes was sticky or hard, and any of the modified iota-carrageenans produced in this comparative example had the same quality as the toothpaste. Not suitable as stabilizer. The viscosity of toothpaste is shown in Table 2. [Table 2] [Table 3] * 1 Viscosity: viscosity of a 1.5% aqueous solution at 75 ° C. * 2 Viscosity and hardness were insufficient, and separation of the abrasive and the liquid component was observed. * 3 It was too hard to be extruded or difficult to extrude from the tube, and the tactile sensation in the mouth was poor. As is clear from the above Examples and Comparative Examples, the viscosity of a 1.5% aqueous solution at 75 ° C. is 5 to 40 cp.
The modified iota carrageenan, which is s, is used alone or in combination with lambda carrageenan as a toothpaste quality stabilizing agent to provide excellent properties inherent in iota carrageenan (prevention of separation of abrasive and liquid components) , While maintaining the smooth feel in the mouth), it has an excellent effect of eliminating the drawback that the viscosity of the toothpaste increases with time and hardens, which was a conventional problem. The toothpaste used as a quality stabilizer has the characteristic that it can maintain its original excellent properties for a long period of time.

Claims (1)

(57)【特許請求の範囲】 1.1.5%水溶液の75℃粘度が5乃至40cpsで
あることを特徴とする変性イオタカラギーナン。 2.ユーキューマスピノサムからのカラギーナンを抽出
した抽出液の状態で加水分解を行うことを特徴とする変
性イオタカラギーナンの製造方法。 3.前記加水分解がアルカリ加水分解、酸加水分解、酸
化剤による加水分解、酵素または微生物による加水分解
である請求項2記載の変性イオタカラギーナンの製造方
法。
(57) [Claims] 1. A modified iota carrageenan characterized in that a 1.5% aqueous solution has a viscosity at 75 ° C of 5 to 40 cps. 2. A method for producing modified iota carrageenan, wherein hydrolysis is performed in the state of an extract obtained by extracting carrageenan from eukyu spinosum. 3. The method for producing a modified iota carrageenan according to claim 2, wherein the hydrolysis is alkali hydrolysis, acid hydrolysis, hydrolysis with an oxidizing agent, hydrolysis with an enzyme or a microorganism.
JP8514997A 1997-04-03 1997-04-03 Modified iota carrageenan and method for producing the same Expired - Lifetime JP2752610B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102471386A (en) * 2009-08-07 2012-05-23 Fmc有限公司 Carrageenan products and method for their production and use

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1098277C (en) * 2000-04-03 2003-01-08 上海众伟生化有限公司 Process for preparing carragheenin
KR100413083B1 (en) * 2000-12-01 2003-12-31 김하형 Iota carrageenan adjuvant-antigen complex and process for preparing the same
US6479649B1 (en) 2000-12-13 2002-11-12 Fmc Corporation Production of carrageenan and carrageenan products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102471386A (en) * 2009-08-07 2012-05-23 Fmc有限公司 Carrageenan products and method for their production and use
CN102471386B (en) * 2009-08-07 2015-12-16 Fmc有限公司 Carrageenan product and production method thereof and application

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