JP4170079B2 - Powder cleaning composition - Google Patents
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- JP4170079B2 JP4170079B2 JP2002342480A JP2002342480A JP4170079B2 JP 4170079 B2 JP4170079 B2 JP 4170079B2 JP 2002342480 A JP2002342480 A JP 2002342480A JP 2002342480 A JP2002342480 A JP 2002342480A JP 4170079 B2 JP4170079 B2 JP 4170079B2
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Description
【0001】
【発明の属する技術分野】
本発明は、粉末洗浄剤組成物に関する。特に好ましくは衣料用粉末洗浄剤組成物に関する。
【0002】
【従来の技術】
粉末洗浄剤組成物は、消費者の利便性より、高嵩密度化や低使用量化が強く指向されている。しかし、高嵩密度粉末洗浄剤組成物は、該組成物を構成する粉末洗浄剤粒子の溶解速度が低くなる傾向があることが知られている。また、環境・エネルギー問題や経済性への対応に基づく、洗濯水の低温化、運転時間の短縮化等の近年の洗濯機の傾向は、いずれも粉末洗浄剤粒子の溶解速度の遅延の要因となり、ひいては粉末洗浄剤組成物の洗浄能力が著しく低下することから、粉末洗浄剤粒子の溶解速度の大幅な向上が切望されている。また洗濯終了時に粉末洗剤の溶け残りが衣類に残留する心配が増大することが重大な課題として挙げられる。
【0003】
従来より、炭酸塩等の水溶性アルカリ粒子の表面を被覆した粒子を配合し、水和凝集を防止し分散性を改善することで、溶解性を改善する試みがなされている(例えば、特許文献1、2参照。)。また、各種の溶解補助剤、溶解度改善剤により溶解性を改善する試みがなされている(例えば、特許文献3、4、5、6、7参照。)。また、水不溶性水膨潤性有機物を用いることで、膨潤により洗剤粒子を細かくし溶解性を改善する試みがなされている(例えば、特許文献8、9、10参照。)。しかし、これらは本来の洗浄には寄与しない成分であることが多く、高嵩密度化や低使用量化には不利である。
【0004】
一方、水不溶性キトサンは、スクラブ剤として洗浄剤に配合したり、酵素の固定化に用いて洗浄剤に配合したり、高分子ビルダーの分散性および生分解性の改善のために用いられてきた(例えば、特許文献11、12、13参照。)。
【0005】
【特許文献1】
特開昭62−253699号公報
【特許文献2】
特開2001−81498号公報
【特許文献3】
特表平8−505177号公報
【特許文献4】
特表平10−500166号公報
【特許文献5】
特表平10−501284号公報
【特許文献6】
特表平10−504329号公報
【特許文献7】
特開2001−172691号公報
【特許文献8】
特開平10−176188号公報
【特許文献9】
特表2001−508493号公報
【特許文献10】
特開2002−129195号公報
【特許文献11】
特開昭61−210014号公報
【特許文献12】
特開平1−132513号公報
【特許文献13】
特開平6−122894号公報
【0006】
【発明が解決しようとする課題】
本発明の課題は、溶解性及び保存安定性の優れた粉末洗浄剤組成物を提供することである。更に、濯ぎ性が良好で、汚れ放出効果を有する粉末洗浄剤組成物を提供することである。
【0007】
【課題を解決するための手段】
本発明は、(a)水不溶性キトサン〔以下、(a)成分という〕、(b)界面活性剤〔以下、(b)成分という〕、及び(c)水溶性無機塩〔以下、(c)成分という〕を含有する粉末洗浄剤組成物に関する。
【0008】
【発明の実施の形態】
本発明の粉末洗浄剤組成物は、溶解性の点で、JIS Z 8801の標準篩を用いて5分間振動させた後、篩目のサイズによる質量分率から求める平均粒子径が150〜1000μmであることが好ましく、より好ましくは150〜800μm、更に好ましくは180〜600μmである。
【0009】
本発明の粉末洗浄剤組成物は、溶解性の点で、JIS K 3362:1998により規定された方法で測定する見掛け密度が1600g/L以下であることが好ましく、1300g/L以下がより好ましく、1000g/L以下が更に好ましい。また、利便性や廃棄物(例えば箱等)低減の点で、見掛け密度は300g/L以上であることが好ましく、600g/L以上がより好ましく、700g/L以上が更に好ましい。
【0010】
本発明の粉末洗浄剤組成物は、JIS K 3362:1998記載の方法による0.1質量%の20℃水溶液のpHが7.5〜12であることが好ましい。洗浄力、安全性の点で8〜11が好ましく、8.5〜11がより好ましく、9〜11が更に好ましく、10〜11が特に好ましい。
【0011】
本発明の粉末洗浄剤組成物は、利便性の点で、圧縮して錠剤形態にしても良いし、1回の使用量を水溶性或いは水不溶性の容器に収納することができる。本発明の粉末洗浄剤組成物は、衣料用として好適である。以下、各成分について詳述する。
【0012】
<(a)成分>
本発明の粉末洗浄剤組成物は、(a)水不溶性キトサンを含有する。溶解性、洗浄性能、汚れ放出効果の点で、(a)成分は、組成物中0.1〜30質量%が好ましく、0.5〜25質量%がより好ましく、1〜20質量%が更に好ましい。
【0013】
本発明において、水不溶性とは、25℃、pH7の水に対する溶解度が1質量%未満であることをいう。
【0014】
本発明において、キトサンとは、キチンを60%以上脱アセチル化して得られるものである。洗浄性能、汚れ放出効果の点で、脱アセチル化度は70%以上が好ましく、70〜95%がより好ましい。
【0015】
溶解性、洗浄性能、汚れ放出効果の点で、(a)成分は、平均粒子径0.01〜2μmが好ましく、0.01〜1μmがより好ましい。平均粒子径は、動的光散乱法などの公知の方法で測定できる。又、嵩密度0.05〜0.35g/mLが好ましく、0.15〜0.25g/mLがより好ましい。又、吸油量20〜200mL/gが好ましく、50〜150mL/gがより好ましい。
【0016】
(a)成分は、溶解性、洗浄性能、汚れ放出効果の点で、表面及び表面近傍に(a)が偏在した粒子、特に(a)成分以外の成分を少なくとも1つ含有する粒子中に配合されることが好ましい。このような粒子の構造は、走査型電子顕微鏡による表面被覆状態の観察により確認され、例えば造粒時において化合物の添加順序を調節することで製造できる。
【0017】
<(b)成分>
本発明の粉末洗浄剤組成物は、(b)界面活性剤を含有する。溶解性、洗浄性能の点で、(b)成分は、組成物中10〜60質量%が好ましく、15〜50質量%がより好ましく、20〜45質量%が更に好ましい。
【0018】
界面活性剤として、(b−1)陰イオン界面活性剤、(b−2)非イオン界面活性剤、両性界面活性剤、陽イオン界面活性剤の1種または組み合わせを挙げることが出来るが、好ましくは(b−1)陰イオン界面活性剤、(b−2)非イオン界面活性剤である。特に(b−1)と(b−2)を組み合わせて用いることが好ましく、(b−1)/(b−2)の質量比は99/1〜1/99が好ましく、99/1〜60/40が更に好ましく、95/5〜60/40が特に好ましい。
【0019】
陰イオン界面活性剤としては、炭素数10〜18のアルコールの硫酸エステル塩、炭素数8〜20のアルコールのアルコキシル化物の硫酸エステル塩、アルキルベンゼンスルホン酸塩、アルキル硫酸エステル塩、パラフィンスルホン酸塩、α−オレフィンスルホン酸塩、α−スルホ脂肪酸塩、α−スルホ脂肪酸アルキルエステル塩又は脂肪酸塩が好ましい。本発明では特に、アルキル鎖の炭素数が10〜14の、より好ましくは12〜14の直鎖アルキルベンゼンスルホン酸塩が好ましい。これらの塩の対イオンとしては、アルカリ金属塩やアミン類が好ましく、特にナトリウム及び/又はカリウム、モノエタノールアミン、ジエタノールアミンが好ましい。
【0020】
非イオン界面活性剤としては、ポリオキシアルキレンアルキル(炭素数8〜20)エーテル、アルキルポリグリコシド、ポリオキシアルキレンアルキル(炭素数8〜20)フェニルエーテル、ポリオキシアルキレンソルビタン脂肪酸(炭素数8〜22)エステル、ポリオキシアルキレングリコール脂肪酸(炭素数8〜22)エステル、ポリオキシエチレンポリオキシプロピレンブロックポリマーが好ましい。特に、非イオン界面活性剤としては、炭素数10〜18のアルコールにエチレンオキシドやプロピレンオキシド等のアルキレンオキシドを4〜20モル付加したポリオキシアルキレンアルキルエーテルが好ましい。非イオン界面活性剤は、HLB値(グリフィン法で算出)が10.5〜15.0、更に11.0〜14.5のものが好ましい。
【0021】
<(c)成分>
本発明の粉末洗浄剤組成物は、(c)水溶性無機塩を含有する。溶解性、洗浄性能の点で、(c)成分は、組成物中10〜50質量%が好ましく、15〜45質量%がより好ましく、20〜40質量%が更に好ましい。
【0022】
本発明において、水溶性とは、25℃、pH7の水に対する溶解度が1質量%以上であることをいう。
【0023】
(c)水溶性無機塩としては、(c−1)炭酸塩(炭酸ナトリウム、炭酸カリウム等)、(c−2)硫酸塩(硫酸ナトリウム等)、ケイ酸塩、リン酸塩(トリポリリン酸塩、ピロリン酸塩、メタリン酸塩、リン酸三ナトリウム等)等が挙げられる。対イオンとしては、アルカリ金属塩、アミン類が好ましく、特にナトリウム及び/又はカリウム、が好ましい。
【0024】
特に(c−1)炭酸塩と(c−2)硫酸塩を組み合わせて用いることが好ましく、溶解性、洗浄性能の点で、(c−1)/(c−2)の質量比は99/1〜50/50が好ましく、99/1〜80/20がより好ましく、99/1〜90/10が更に好ましい。
【0025】
<その他成分>
本発明の粉末洗浄剤組成物は、溶解性、洗浄性能の点で、(d)水不溶性無機物〔以下、(d)成分という〕を含有することが好ましく、その配合量は、組成物中、5〜50質量%がより好ましく、10〜45質量%が更に好ましく、15〜40質量%が特に好ましい。(d)成分としては、アルミノケイ酸塩(A型ゼオライト、P型ゼオライト、X型ゼオライト、非晶質アルミノケイ酸塩等)、結晶性ケイ酸塩等が挙げられる。中でも粒子径3μm以下、更に1μm以下のA型ゼオライトが好ましい。
【0026】
粉末洗浄剤組成物には、その他のビルダー、漂白剤(過炭酸塩、過ホウ酸塩、漂白活性化剤等)、再汚染防止剤(カルボキシメチルセルロース等)、柔軟化剤(ジアルキル型第四級アンモニウム塩、粘土鉱物等)、還元剤(亜硫酸塩等)、蛍光増白剤(ビフェニル型、アミノスチルベン型等)、泡コントロール剤(シリコーン等)、香料、酵素(プロテアーゼ、ペクチナーゼ、アミラーゼ、リパーゼ等)等の添加剤を含有させることができる。これらは、別の粒子として粉末洗浄剤組成物に配合しても良い。
【0027】
【実施例】
<粉末洗浄剤組成物の作成>
実施例1
表1に示す粉末洗浄剤組成物1の成分のうち、STPP、炭酸ナトリウム、亜硫酸ナトリウム、蛍光染料を、レディゲミキサーFKM−130D((株)マツボー製)を用いて攪拌羽根を周速3.4m/s、剪断機周速27m/sで1分間混合した。
【0028】
次に同条件でミキサーを作動させながら、直鎖アルキル(炭素数12〜14)ベンゼンスルホン酸(含水率0.5質量%)と硫酸の混合物を4分間で加え、更に5分間作動させて中和反応を行った。中和反応中、ミキサーのジャケットに25℃水を通して冷却した。最後の5分間は、ミキサー内部に空気を流入させた。同条件でミキサーを作動させながら、パーム核油脂肪酸を1分間で加え、更に5分間作動させて中和反応を行った。中和反応中、ミキサーのジャケットに25℃水を通して冷却し、ミキサー内部に空気を流入させた。
【0029】
次に同条件でミキサーを作動させながら、ノニオン、PEG(ポリエチレングリコール、PEG13000)、AA/MAコポリマー40質量%水溶液を1分間で加え、更に2分間作動させて造粒を行った。続いて水不溶性キトサンA及びゼオライトを加え、更に2分間作動させて表面改質処理を行い、2000μmの篩を通過させた後、酵素、香料を加え、混合し粉末洗浄剤組成物を得た。該組成物の嵩密度は820g/Lであった。また、該組成物は、(a)成分が表面及び表面近傍に偏在する粒子からなり、該粒子の平均粒子径は414μmであった。
【0030】
実施例2
粉末洗浄剤組成物ベースで、直鎖アルキルベンゼンスルホン酸カリウム(炭素数10〜14)10質量%、α−オレフィンスルホン酸カリウム(炭素数14〜18)10質量%、ノニオン7質量%、PEG1質量%、ゼオライト15質量%、AA/MAコポリマー0.5質量%、脂肪酸石鹸(パーム核油由来)5.5質量%、1号ケイ酸ナトリウム4質量%、炭酸カリウム8質量%、硫酸ナトリウム2質量%、亜硫酸ナトリウム1質量%、及び蛍光染料0.1質量%からなる、スラリー(固形分50質量%)を調製し、噴霧乾燥して噴霧乾燥組成物を得た。これに粉末洗浄剤組成物ベースで、炭酸ナトリウム12質量%をリボンミキサーに投入して混合を行った。得られた混合物を前押し出し式2軸型押し出し造粒機(ペレッターダブル:不二パウダル(株)製)で直径が10mmの円柱状に押し出し成形して圧密化した。得られたペレット状物を、水不溶性キトサンA及びゼオライト5質量%とともにフラッシュミル(不二パウダル(株)製)で粉砕造粒して表面被覆を行った。2000μmの篩を通過させた後、リボンミキサーに移し、ゼオライト5質量%、酵素、香料を加え、混合して、粉末洗浄剤組成物を得た。該組成物の嵩密度は820g/Lであった。また、該組成物は、(a)成分が表面及び表面近傍に偏在する粒子からなり、該粒子の平均粒子径は390μmであった。
【0031】
実施例3
固形分48質量%のスラリーを、熱風温度250℃で噴霧乾燥し、粉末洗浄剤組成物ベースで、ポリアクリル酸ナトリウム4質量%、炭酸ナトリウム16質量%、硫酸ナトリウム10質量%、蛍光染料0.1質量%、ゼオライト16質量%、水0.5質量%のベース顆粒を得た。
【0032】
次に、レディゲミキサー(松阪技研(株)製、容量20L、ジャケット付き)にベース顆粒を投入し、主軸(150rpm)の攪拌下、非イオン界面活性剤9質量%、直鎖アルキル(炭素数10〜14)ベンゼンスルホン酸ナトリウム10質量%、石鹸2質量%、PEG1質量%、水2質量%の混合液を、3分間で投入し、その後5分間攪拌を行った。更に、このミキサーに水不溶性キトサンA、結晶性シリケート8質量%、ゼオライト10質量%を投入し、表面被覆を行った。2000μmの篩を通過させた後、リボンミキサーに移し、酵素、香料を加え、混合して、粉末洗浄剤組成物を得た。該組成物の嵩密度は820g/Lであった。また、該組成物は、(a)成分が表面及び表面近傍に偏在する粒子からなり、該粒子の平均粒子径は280μmであった。
【0033】
実施例4〜7
実施例3と同様にして、表1に示す、実施例4〜7の粉末洗浄剤組成物を得た。
【0034】
比較例1、2
実施例1、2と同様にして、表1に示す、比較例1、2の粉末洗浄剤組成物をそれぞれ得た。
【0035】
(1)溶解性評価
松下電器産業製洗濯機「愛妻号 NA−F42Y1」のパルセータの6分割された扇状の窪みの1つの外周の近くに粉末洗浄剤組成物25.0gを集合状態で置き、これを崩さずに衣料1.5kg(木綿肌着50質量%、ポリエステル/綿混Yシャツ50質量%)を洗濯槽に投入し、洗剤に直接水が当らないように10L/minの流量で5℃の水道水22Lを注水し、注水終了後に静置した。注水開始から3分間後、弱水流(手洗いモード)で攪拌を開始し、3分間攪拌した後に排水し、衣料及び洗濯槽に残留する粉末洗浄剤組成物の状態を下記の評価基準によって目視判定した。尚、本評価の攪拌力は標準よりも極めて弱く、評価基準の◎、○は分散性に優れることを示す。また、下記記載の「凝集物」とは、洗剤粒子が凝集した直径3mm以上の塊をいう。
【0036】
〔評価基準〕
◎:凝集物がない。
○:凝集物が殆どない。
△:凝集物が少量残留している。
×:凝集物が多量に残留している。
【0037】
(2)保存安定性評価
<保存評価用容器>
透湿度(JIS Z 0208:1976による)35g/m2・24hrである9cm×15cm×13cm(高さ)のカートン容器に、粉末洗浄剤組成物1.2kgを充填し封緘する。
【0038】
<保存条件>
温度30℃一定で、湿度40%に16時間保持、16時間かけて湿度を80%に変更、湿度80%に48時間保持、16時間かけて湿度を40%に変更するというサイクルを繰り返し、180日間保存する。
【0039】
<評価方法>
容器上面を剥がし、容器側面の4つの角を静かに切断する。次に容器側面の4つの面を外側に静かに倒し、内容物の状態を観察する。
【0040】
〔評価基準〕
○:内容物が山状に崩れ、固化物が殆ど認められない。
△:内容物は山状に崩れるが、固形物が認められる。
×:内容物全体が固化し、山状に崩れない。
【0041】
(3)洗浄性能評価
<木綿繊維布の繰り返し洗浄及び汚染布の作成>
表1に記載の配合成分からなる粉末洗浄剤組成物をJIS K3362:1998 記載の使用水に溶解し、0.1質量%水溶液を調製する。10cm×10cmの木綿布5枚を前記洗剤水溶液に添加し、20℃、10分間、100rpmでターゴトメーターにて撹拌洗浄する。流水下で濯いだ後、遠心脱水機にかけ充分水分を除去した後25℃、50%RHの室内で1時間以上乾燥させる。本洗浄処理を3回繰り返し行った後に、洗浄処理後の木綿布に対し、綿実油60%、コレステロール10%、オレイン酸10%、パルミチン酸10%及び固体パラフィン10%からなるモデル皮脂汚れを10cm×10cmあたり2g均一に塗布して皮脂汚れ汚染布を作製した。表1の組成物それぞれについてこの処理を行った汚染布を作製した。
【0042】
<洗浄条件、洗浄方法及び評価方法>
JIS K3362:1998 記載の洗浄力判定用指標洗剤(蛍光増白剤無添加)をJIS K3362:1998 記載の使用水に溶解し、標準濃度となるように調製する。それぞれの組成物に対応する木綿汚染布5枚を洗浄剤組成物水溶液に添加し、20℃、10分間、100rpmでターゴトメーターにて撹拌洗浄する。流水下で濯いだ後、アイロンプレス処理を行った。
【0043】
次いで洗浄前の原布、繰り返し洗浄後に調製した汚染布、最終洗浄後の汚染布の460nmにおける反射率を自記色彩計(島津製作所(株))にて測定し、次式から洗浄率(%)を算出した。
洗浄率(%)=〔(最終洗浄後の反射率−汚染布調製後の反射率)/(原布の反射率−汚染布調製後の反射率〕×100
5枚の汚染布についての平均値から以下の基準で評価した。
【0044】
〔評価基準〕
◎:洗浄率56%以上
○:洗浄率53%以上、56%未満
△:洗浄率50%以上、53%未満
×:洗浄率50%未満
【0045】
【表1】
【0046】
・水不溶性キトサンA:脱アセチル化度90%、平均粒子径0.12μm、嵩密度0.2g/mL、吸油量65mL/g
・水不溶性キトサンB:脱アセチル化度75%、平均粒子径0.12μm、嵩密度0.2g/mL、吸油量60mL/g
・LAS−Na:アルキル基の炭素数が10〜14のアルキルベンゼンスルホン酸ナトリウム
・ノニオン:アルキル基の炭素数が12〜14でエチレンオキサイド平均付加モル数が7であるポリオキシエチレンアルキルエーテル
・STPP:トリポリリン酸ナトリウム
・結晶性シリケート:粉末SKS−6(ヘキストトクヤマ(株)製)
・PEG:ポリエチレングリコール(重量平均分子量13000)
・AA/MAコポリマー:アクリル酸−マレイン酸コポリマーのナトリウム塩(70モル%中和)であり、モノマー比はアクリル酸/マレイン酸=3/7(モル比)、重量平均分子量70000
・ポリアクリル酸ナトリウム:重量平均分子量10000
・蛍光染料:チノパールCBS−X(チバガイギー社製)
・酵素:セルラーゼK(特開昭63−264699号公報記載)、リポラーゼ100T(ノボ社製)を3:1の質量比で混合したもの[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a powder cleaning composition. Particularly preferably, it relates to a powder cleaning composition for clothing.
[0002]
[Prior art]
The powder detergent composition is strongly directed to increase the bulk density and reduce the amount of use for the convenience of consumers. However, it is known that a high bulk density powder detergent composition tends to have a low dissolution rate of the powder detergent particles constituting the composition. In addition, recent trends in washing machines, such as lowering the temperature of washing water and shortening of operation time based on environmental and energy issues and economic efficiency, all cause a delay in the dissolution rate of powder detergent particles. As a result, the cleaning ability of the powder detergent composition is remarkably lowered, and therefore, there is an urgent need to greatly improve the dissolution rate of the powder detergent particles. Moreover, it is mentioned as a serious problem that the concern that the undissolved powder detergent remains on the clothes at the end of washing increases.
[0003]
Conventionally, attempts have been made to improve solubility by blending particles coated with the surface of water-soluble alkali particles such as carbonates to prevent hydration and aggregation and improve dispersibility (for example, patent documents). 1 and 2). In addition, attempts have been made to improve solubility with various solubilizers and solubility improvers (see, for example, Patent Documents 3, 4, 5, 6, and 7). In addition, attempts have been made to make detergent particles finer by swelling by using a water-insoluble water-swellable organic substance (see, for example, Patent Documents 8, 9, and 10). However, these are often components that do not contribute to the original cleaning, which is disadvantageous for high bulk density and low usage.
[0004]
On the other hand, water-insoluble chitosan has been used to improve the dispersibility and biodegradability of polymer builders, as a scrubbing agent, as a scrub agent, as an enzyme immobilization, as a detergent. (For example, refer to Patent Documents 11, 12, and 13).
[0005]
[Patent Document 1]
JP 62-253699 A [Patent Document 2]
JP 2001-81498 A [Patent Document 3]
Japanese Patent Publication No. 8-505177 [Patent Document 4]
JP 10-500166 gazette [Patent Document 5]
Japanese National Patent Publication No. 10-501284 [Patent Document 6]
JP 10-504329 A [Patent Document 7]
JP 2001-172691 A [Patent Document 8]
JP-A-10-176188 [Patent Document 9]
JP 2001-508493 A [Patent Document 10]
JP 2002-129195 A [Patent Document 11]
JP-A-61-210014 [Patent Document 12]
JP-A-1-132513 [Patent Document 13]
JP-A-6-122894 gazette
[Problems to be solved by the invention]
An object of the present invention is to provide a powder detergent composition having excellent solubility and storage stability. It is another object of the present invention to provide a powder cleaning composition having good rinsing properties and having a soil release effect.
[0007]
[Means for Solving the Problems]
The present invention includes (a) water-insoluble chitosan (hereinafter referred to as component (a)), (b) a surfactant (hereinafter referred to as component (b)), and (c) a water-soluble inorganic salt [hereinafter referred to as (c). It is related with the powder cleaning composition containing a component.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The powder detergent composition of the present invention has an average particle size of 150 to 1000 μm determined from the mass fraction according to the size of the sieve mesh after being shaken for 5 minutes using a standard sieve of JIS Z 8801 in terms of solubility. The thickness is preferably 150 to 800 μm, more preferably 180 to 600 μm.
[0009]
In terms of solubility, the powder detergent composition of the present invention preferably has an apparent density of 1600 g / L or less, more preferably 1300 g / L or less, as measured by a method defined by JIS K 3362: 1998. More preferably 1000 g / L or less. In terms of convenience and reduction of waste (such as boxes), the apparent density is preferably 300 g / L or more, more preferably 600 g / L or more, and further preferably 700 g / L or more.
[0010]
In the powder detergent composition of the present invention, the pH of a 0.1% by mass 20 ° C. aqueous solution obtained by the method described in JIS K 3362: 1998 is preferably 7.5 to 12. 8-11 are preferable at the point of detergency and safety, 8.5-11 are more preferable, 9-11 are still more preferable, and 10-11 are especially preferable.
[0011]
The powder detergent composition of the present invention may be compressed into a tablet form for convenience, and a single use amount can be stored in a water-soluble or water-insoluble container. The powder cleaning composition of the present invention is suitable for clothing. Hereinafter, each component will be described in detail.
[0012]
<(A) component>
The powder detergent composition of the present invention contains (a) water-insoluble chitosan. In terms of solubility, cleaning performance, and soil release effect, the component (a) is preferably 0.1 to 30% by mass, more preferably 0.5 to 25% by mass, and further 1 to 20% by mass in the composition. preferable.
[0013]
In the present invention, water-insoluble means that the solubility in water at 25 ° C. and pH 7 is less than 1% by mass.
[0014]
In the present invention, chitosan is obtained by deacetylating chitin 60% or more. In terms of cleaning performance and dirt release effect, the degree of deacetylation is preferably 70% or more, more preferably 70 to 95%.
[0015]
In terms of solubility, cleaning performance, and dirt release effect, the component (a) preferably has an average particle size of 0.01 to 2 μm, more preferably 0.01 to 1 μm. The average particle diameter can be measured by a known method such as a dynamic light scattering method. Moreover, the bulk density is preferably 0.05 to 0.35 g / mL, more preferably 0.15 to 0.25 g / mL. The oil absorption is preferably 20 to 200 mL / g, more preferably 50 to 150 mL / g.
[0016]
Component (a) is blended in particles having (a) unevenly distributed on the surface and in the vicinity of the surface, particularly particles containing at least one component other than component (a) in terms of solubility, cleaning performance, and soil release effect. It is preferred that The structure of such particles can be confirmed by observing the surface coating state with a scanning electron microscope, and can be produced, for example, by adjusting the order of compound addition during granulation.
[0017]
<(B) component>
The powder cleaning composition of the present invention contains (b) a surfactant. In terms of solubility and cleaning performance, the component (b) is preferably 10 to 60% by mass, more preferably 15 to 50% by mass, and still more preferably 20 to 45% by mass in the composition.
[0018]
Examples of the surfactant may include one or a combination of (b-1) an anionic surfactant, (b-2) a nonionic surfactant, an amphoteric surfactant, and a cationic surfactant. Are (b-1) anionic surfactants and (b-2) nonionic surfactants. In particular, (b-1) and (b-2) are preferably used in combination, and the mass ratio of (b-1) / (b-2) is preferably 99/1 to 1/99, and 99/1 to 60. / 40 is more preferable, and 95/5 to 60/40 is particularly preferable.
[0019]
Examples of the anionic surfactant include a sulfate ester salt of an alcohol having 10 to 18 carbon atoms, a sulfate ester salt of an alkoxylate of an alcohol having 8 to 20 carbon atoms, an alkylbenzene sulfonate, an alkyl sulfate ester salt, a paraffin sulfonate, α-olefin sulfonate, α-sulfo fatty acid salt, α-sulfo fatty acid alkyl ester salt or fatty acid salt are preferred. In the present invention, a linear alkyl benzene sulfonate having an alkyl chain having 10 to 14 carbon atoms, more preferably 12 to 14 carbon atoms is preferred. As a counter ion of these salts, alkali metal salts and amines are preferable, and sodium and / or potassium, monoethanolamine, and diethanolamine are particularly preferable.
[0020]
Nonionic surfactants include polyoxyalkylene alkyl (carbon number 8 to 20) ether, alkyl polyglycoside, polyoxyalkylene alkyl (carbon number 8 to 20) phenyl ether, polyoxyalkylene sorbitan fatty acid (carbon number 8 to 22). ) Ester, polyoxyalkylene glycol fatty acid (carbon number 8 to 22) ester, and polyoxyethylene polyoxypropylene block polymer are preferable. In particular, the nonionic surfactant is preferably a polyoxyalkylene alkyl ether obtained by adding 4 to 20 moles of an alkylene oxide such as ethylene oxide or propylene oxide to an alcohol having 10 to 18 carbon atoms. The nonionic surfactant preferably has an HLB value (calculated by the Griffin method) of 10.5 to 15.0, more preferably 11.0 to 14.5.
[0021]
<(C) component>
The powder cleaning composition of the present invention contains (c) a water-soluble inorganic salt. In terms of solubility and cleaning performance, the component (c) is preferably 10 to 50% by mass, more preferably 15 to 45% by mass, and still more preferably 20 to 40% by mass in the composition.
[0022]
In the present invention, water-soluble means that the solubility in water at 25 ° C. and pH 7 is 1% by mass or more.
[0023]
(C) Water-soluble inorganic salts include (c-1) carbonates (sodium carbonate, potassium carbonate, etc.), (c-2) sulfates (sodium sulfate, etc.), silicates, phosphates (tripolyphosphates) , Pyrophosphate, metaphosphate, trisodium phosphate, etc.). The counter ion is preferably an alkali metal salt or an amine, and particularly preferably sodium and / or potassium.
[0024]
In particular, it is preferable to use a combination of (c-1) carbonate and (c-2) sulfate. In terms of solubility and cleaning performance, the mass ratio of (c-1) / (c-2) is 99 / 1-50 / 50 is preferable, 99 / 1-80 / 20 is more preferable, and 99 / 1-90 / 10 is still more preferable.
[0025]
<Other ingredients>
The powder cleaning composition of the present invention preferably contains (d) a water-insoluble inorganic substance (hereinafter referred to as (d) component) in terms of solubility and cleaning performance. 5-50 mass% is more preferable, 10-45 mass% is still more preferable, and 15-40 mass% is especially preferable. Examples of the component (d) include aluminosilicate (A-type zeolite, P-type zeolite, X-type zeolite, amorphous aluminosilicate, etc.), crystalline silicate, and the like. Among these, A-type zeolite having a particle size of 3 μm or less, and further 1 μm or less is preferable.
[0026]
Powder cleaner composition includes other builders, bleach (percarbonate, perborate, bleach activator, etc.), anti-staining agent (carboxymethyl cellulose, etc.), softener (dialkyl type quaternary) Ammonium salts, clay minerals, etc.), reducing agents (sulfites, etc.), fluorescent brighteners (biphenyl type, aminostilbene type, etc.), foam control agents (silicone, etc.), fragrances, enzymes (proteases, pectinases, amylases, lipases, etc.) ) And the like can be contained. You may mix | blend these with a powder cleaning composition as another particle | grain.
[0027]
【Example】
<Preparation of powder cleaning composition>
Example 1
Among the components of the powder detergent composition 1 shown in Table 1, STPP, sodium carbonate, sodium sulfite, and fluorescent dye are mixed with a Redige mixer FKM-130D (manufactured by Matsubo Co., Ltd.) with a stirring blade at a peripheral speed of 3. The mixture was mixed at 4 m / s and a shearing machine peripheral speed of 27 m / s for 1 minute.
[0028]
Next, while operating the mixer under the same conditions, a mixture of linear alkyl (carbon number 12 to 14) benzenesulfonic acid (water content 0.5 mass%) and sulfuric acid was added over 4 minutes, and the operation was continued for another 5 minutes. A sum reaction was performed. During the neutralization reaction, 25 ° C. water was cooled through the jacket of the mixer. Air was allowed to flow into the mixer for the last 5 minutes. While operating the mixer under the same conditions, palm kernel oil fatty acid was added in 1 minute, and further operated for 5 minutes to carry out a neutralization reaction. During the neutralization reaction, 25 ° C. water was cooled through the jacket of the mixer, and air was introduced into the mixer.
[0029]
Next, while operating the mixer under the same conditions, nonion, PEG (polyethylene glycol, PEG13000), AA / MA copolymer 40 mass% aqueous solution was added in 1 minute, and granulated by operating for 2 minutes. Subsequently, water-insoluble chitosan A and zeolite were added, and further surface treatment was performed by operating for 2 minutes. After passing through a 2000 μm sieve, enzymes and fragrances were added and mixed to obtain a powder detergent composition. The bulk density of the composition was 820 g / L. The composition was composed of particles in which component (a) was unevenly distributed on the surface and in the vicinity of the surface, and the average particle size of the particles was 414 μm.
[0030]
Example 2
Based on powder detergent composition, 10% by mass of linear alkylbenzene sulfonate (10 to 14 carbon atoms), 10% by mass of potassium α-olefin sulfonate (14 to 18 carbons), 7% by weight of nonion, 1% by mass of PEG 15% by mass of zeolite, 0.5% by mass of AA / MA copolymer, 5.5% by mass of fatty acid soap (derived from palm kernel oil), 4% by mass of sodium silicate, 8% by mass of potassium carbonate, 2% by mass of sodium sulfate A slurry (solid content of 50% by mass) consisting of 1% by mass of sodium sulfite and 0.1% by mass of a fluorescent dye was prepared and spray-dried to obtain a spray-dried composition. To this, 12% by mass of sodium carbonate was charged into a ribbon mixer and mixed on a powder detergent composition basis. The obtained mixture was extruded into a columnar shape having a diameter of 10 mm with a pre-extrusion type twin-screw type extrusion granulator (Peletter Double: manufactured by Fuji Powder Co., Ltd.) to be consolidated. The obtained pellet-like material was ground and granulated with a flash mill (manufactured by Fuji Powder Co., Ltd.) together with water-insoluble chitosan A and 5% by mass of zeolite to perform surface coating. After passing through a 2000 μm sieve, the mixture was transferred to a ribbon mixer, and 5% by mass of zeolite, enzyme, and fragrance were added and mixed to obtain a powder detergent composition. The bulk density of the composition was 820 g / L. The composition was composed of particles in which component (a) was unevenly distributed on the surface and in the vicinity of the surface, and the average particle size of the particles was 390 μm.
[0031]
Example 3
A slurry having a solid content of 48% by mass was spray-dried at a hot air temperature of 250 ° C., and 4% by mass of sodium polyacrylate, 16% by mass of sodium carbonate, 10% by mass of sodium sulfate, and fluorescent dye 0. A base granule of 1% by mass, 16% by mass of zeolite and 0.5% by mass of water was obtained.
[0032]
Next, the base granule was put into a Redige mixer (manufactured by Matsusaka Giken Co., Ltd., capacity 20L, with jacket), and 9% by mass of nonionic surfactant, linear alkyl (carbon number) with stirring of the main shaft (150 rpm) 10-14) A mixed solution of 10% by mass of sodium benzenesulfonate, 2% by mass of soap, 1% by mass of PEG, and 2% by mass of water was added in 3 minutes, and then stirred for 5 minutes. Further, water-insoluble chitosan A, 8% by mass of crystalline silicate, and 10% by mass of zeolite were put into this mixer to perform surface coating. After passing through a 2000 μm sieve, it was transferred to a ribbon mixer, and enzymes and fragrances were added and mixed to obtain a powder cleaning composition. The bulk density of the composition was 820 g / L. The composition was composed of particles in which component (a) was unevenly distributed on the surface and in the vicinity of the surface, and the average particle size of the particles was 280 μm.
[0033]
Examples 4-7
In the same manner as in Example 3, the powder cleaning compositions of Examples 4 to 7 shown in Table 1 were obtained.
[0034]
Comparative Examples 1 and 2
In the same manner as in Examples 1 and 2, powder cleaning compositions of Comparative Examples 1 and 2 shown in Table 1 were obtained.
[0035]
(1) Solubility Evaluation 25.0 g of a powder detergent composition is placed in the vicinity of one outer periphery of a fan-shaped depression divided into six pulsators of a washing machine “Aizuma No. NA-F42Y1” manufactured by Matsushita Electric Industrial Co., Ltd. Without breaking this, 1.5 kg of clothing (50% by weight of cotton underwear, 50% by weight of polyester / cotton blended Y-shirt) is put into the washing tub and at a flow rate of 10 L / min at 5 ° C. so that the detergent is not directly exposed to water. Of tap water 22L, and left standing after the end of the water injection. After 3 minutes from the start of water injection, stirring was started with a weak water flow (hand washing mode), and after 3 minutes of stirring, drained, and the state of the powder cleaning composition remaining in the clothes and the washing tub was visually determined according to the following evaluation criteria. . In addition, the stirring force of this evaluation is extremely weaker than the standard, and the evaluation criteria “◎” and “◯” indicate excellent dispersibility. The “aggregate” described below refers to a lump having a diameter of 3 mm or more in which detergent particles are aggregated.
[0036]
〔Evaluation criteria〕
A: There is no aggregate.
○: There is almost no aggregate.
Δ: A small amount of aggregate remains.
X: A large amount of aggregate remains.
[0037]
(2) Storage stability evaluation <Storage evaluation container>
A carton container having a moisture permeability (according to JIS Z 0208: 1976) of 35 g / m 2 · 24 hr is filled with 1.2 kg of the powder detergent composition and sealed.
[0038]
<Storage conditions>
The temperature is constant at 30 ° C, the humidity is kept at 40% for 16 hours, the humidity is changed to 80% over 16 hours, the humidity is kept at 80% for 48 hours, and the humidity is changed to 40% over 16 hours. Save for days.
[0039]
<Evaluation method>
Peel off the top of the container and gently cut the four corners on the side of the container. Next, gently tilt the four sides of the container outward and observe the contents.
[0040]
〔Evaluation criteria〕
○: The content collapses into a mountain shape, and almost no solidified product is observed.
(Triangle | delta): Although the content collapses into a mountain shape, a solid substance is recognized.
X: The whole content solidifies and does not collapse into a mountain shape.
[0041]
(3) Evaluation of cleaning performance <Repeated cleaning of cotton fiber cloth and creation of contaminated cloth>
A powder detergent composition comprising the blending components shown in Table 1 is dissolved in water for use as described in JIS K3362: 1998 to prepare a 0.1% by mass aqueous solution. Five cotton cloths of 10 cm × 10 cm are added to the aqueous detergent solution, followed by stirring and washing with a tartometer at 20 ° C. for 10 minutes at 100 rpm. After rinsing under running water, it is dried in a room at 25 ° C. and 50% RH for 1 hour or more after removing water sufficiently by a centrifugal dehydrator. After repeating this washing process three times, model sebum soil consisting of 60% cotton seed oil, 10% cholesterol, 10% oleic acid, 10% palmitic acid and 10% solid paraffin is applied to the washed cotton cloth 10cm × 2 g per 10 cm was uniformly applied to prepare a sebum-stained cloth. Contaminated cloth which performed this process about each composition of Table 1 was produced.
[0042]
<Cleaning conditions, cleaning methods and evaluation methods>
An index detergent for determining detergency as described in JIS K3362: 1998 (without adding a fluorescent brightening agent) is dissolved in water used as described in JIS K3362: 1998 to prepare a standard concentration. Five cotton-stained cloths corresponding to the respective compositions are added to the cleaning composition aqueous solution, and the mixture is washed with stirring by a tartometer at 20 ° C. for 10 minutes at 100 rpm. After rinsing under running water, an iron press treatment was performed.
[0043]
Next, the reflectance at 460 nm of the raw cloth before washing, the contaminated cloth prepared after repeated washing, and the contaminated cloth after final washing was measured with a self-recording colorimeter (Shimadzu Corporation). Was calculated.
Washing rate (%) = [(reflectance after final cleaning−reflectance after preparation of contaminated cloth) / (reflectance of raw cloth−reflectance after preparation of contaminated cloth) × 100
Evaluation was made according to the following criteria from the average value of the five contaminated cloths.
[0044]
〔Evaluation criteria〕
◎: Cleaning rate of 56% or more ○: Cleaning rate of 53% or more, less than 56% Δ: Cleaning rate of 50% or more, less than 53% ×: Cleaning rate of less than 50%
[Table 1]
[0046]
Water-insoluble chitosan A: Deacetylation degree 90%, average particle size 0.12 μm, bulk density 0.2 g / mL, oil absorption 65 mL / g
Water-insoluble chitosan B: Deacetylation degree 75%, average particle size 0.12 μm, bulk density 0.2 g / mL, oil absorption 60 mL / g
LAS-Na: sodium alkylbenzene sulfonate having 10 to 14 carbon atoms in the alkyl group Nonionic: polyoxyethylene alkyl ether having 12 to 14 carbon atoms in the alkyl group and an average number of moles of added ethylene oxide of 7 STPP: Sodium tripolyphosphate / crystalline silicate: powder SKS-6 (manufactured by Hoechst Tokuyama Corporation)
PEG: polyethylene glycol (weight average molecular weight 13000)
AA / MA copolymer: sodium salt of acrylic acid-maleic acid copolymer (70 mol% neutralized), monomer ratio is acrylic acid / maleic acid = 3/7 (molar ratio), weight average molecular weight 70000
-Sodium polyacrylate: weight average molecular weight 10,000
・ Fluorescent dye: Chino Pearl CBS-X (Ciba Geigy)
Enzyme: Cellulase K (described in JP-A 63-264699) and Lipolase 100T (manufactured by Novo) at a mass ratio of 3: 1
Claims (4)
(c)として、(c−1)炭酸塩及び(c−2)硫酸塩を含有し、(c−1)/(c−2)の質量比が99/1〜50/50であり、
表面及び表面近傍に(a)が偏在した粒子を含有する、
衣料用粉末洗浄剤組成物。 (A) 0.1-30% by mass of water-insoluble chitosan obtained by deacetylating 60% or more of chitin , (b) 10-60 % by mass of surfactant, and (c) 10-50% by mass of water-soluble inorganic salt a laundry powder detergent composition containing,
(C) contains (c-1) carbonate and (c-2) sulfate, and the mass ratio of (c-1) / (c-2) is 99/1 to 50/50,
Containing particles in which (a) is unevenly distributed on the surface and in the vicinity of the surface;
Powder cleaning composition for clothing.
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JP5173509B2 (en) * | 2008-03-24 | 2013-04-03 | ライオン株式会社 | Granular detergent composition and method for producing the same |
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