JP4063431B2 - High bulk density detergent particles - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は高嵩密度洗剤粒子群に関する。
【０００２】
【従来の技術】
粉末洗剤の流動性、外観を向上させ、微粉の発生を抑える目的で、平均粒子径を大きくした高嵩密度洗剤粒子群が知られている。しかし、該洗剤粒子群は低嵩密度洗剤粒子群に比べて溶解時間が長い為、水温や攪拌力等の洗濯条件によっては洗浄力の低下や溶け残りが生じるおそれがあった。
例えば、特開平５−２４７４９７号公報には、平均粒径の大きい高嵩密度洗剤粒子群を含有してなる洗剤組成物が開示されているが、低水温域での溶解性や洗浄性の点で未だ満足のいくものではなかった。
【０００３】
【発明が解決しようとする課題】
本発明の課題は、如何なる洗濯条件でも溶解性及び洗浄性に優れる高嵩密度洗剤粒子群を提供することにある。
【０００４】
【課題を解決するための手段】
即ち、本発明の要旨は、
〔１〕 界面活性剤を含有し、平均粒径が１５０〜５００μｍ、嵩密度が５００ｇ／Ｌ以上の高嵩密度洗剤粒子群であって、７１０μｍ以上の粒径の粒子及び１２５μｍ未満の粒径の粒子がそれぞれ該洗剤粒子群全体の１０重量％以下であり、かつ該洗剤粒子群中の全陽イオンに対するカリウムイオンの重量比が０．０５〜０．６である高嵩密度洗剤粒子群、
〔２〕 水難溶性無機物と、水溶性ポリマー及び水溶性塩類から選ばれる一種以上を含有してなるベース顆粒に界面活性剤が担持されてなる、平均粒径が１５０〜７００μｍ、嵩密度が５００ｇ／Ｌ以上の高嵩密度洗剤粒子群であって、該洗剤粒子群中の全陽イオンに対するカリウムイオンの重量比が０．０５〜０．６である高嵩密度洗剤粒子群、に関するものである。
【０００５】
【発明の実施の形態】
本発明の高嵩密度洗剤粒子群中の全陽イオンに対するカリウムイオンの重量比は溶解性、洗浄性、流動性及び生産性の観点から０．０５〜０．６、好ましくは０．１〜０．５５、より好ましくは０．２〜０．５である。かかる重量比は原子吸光法により確認することができる。
【０００６】
また、ＪＩＳ Ｋ ３３６２により規定された嵩密度は５００ｇ／Ｌ以上、好ましくは５００〜１０００ｇ／Ｌ、より好ましくは６００〜１０００ｇ／Ｌ、特に好ましくは６５０〜８５０ｇ／Ｌである。
水分量は、洗剤粒子群の２０重量％以下が好ましく、１０重量％以下がより好ましく、５重量％以下が特に好ましい。
【０００７】
本発明の洗剤粒子群としては、例えば、以下の態様の粒子群が好ましい。
１）態様１
本態様の洗剤粒子群の平均粒径は、ペースト化による溶解速度遅延の防止及び洗剤粒子の溶解性向上の観点から１５０〜５００μｍであり、１８０〜４００μｍが好ましく、２００〜３００μｍがより好ましい。該平均粒径はメジアン径であり、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重量分率から測定する。
【０００８】
特に、本態様の洗剤粒子群は、低水温や低攪拌等の洗浄条件での溶解性及び洗浄性の点で平均粒径が１５０〜５００μｍであり、７１０μｍ以上の粒径の粒子が洗剤粒子群全体の１０重量％以下、好ましくは８重量％以下、特に好ましくは０重量％、及び１２５μｍ以下の粒径の粒子が１０重量％以下、好ましくは８重量％以下、特に好ましくは０重量％の洗剤粒子群である。該粒径分布は、例えば、それぞれの篩の目開きが装置上部から下部に向かって２０００μｍ、１４１０μｍ、１０００μｍ、７１０μｍ、５００μｍ、３５５μｍ、２５０μｍ、１８０μｍ及び１２５μｍである９段の篩と、目開きが１２５μｍの篩を通り抜ける粒子を受ける、最下部にある受け皿とからなる分級装置を用いて分級することにより求めることができる。
【０００９】
本態様の洗剤粒子群は陰イオン界面活性剤、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等の界面活性剤を含有する。界面活性剤の含有量は、洗浄力、生産性、ケーキング防止及び流動性の観点から５〜８０重量％が好ましく、１０〜６０重量％がより好ましい。
【００１０】
陰イオン界面活性剤としては、高級アルコールの硫酸エステル塩、高級アルコールのエト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、パラフィンスルホン酸塩、α−オレフィンスルホン酸塩、α−スルホ脂肪酸塩若しくはそのアルキルエステル塩、又は脂肪酸塩等が挙げられる。特に、炭素数が１０〜１８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、炭素数が１０〜２０のα−スルホ脂肪酸アルキルエステル塩が好ましい。
【００１１】
非イオン界面活性剤としては、高級アルコールのエチレンオキシド（以下「ＥＯ」という）付加物、若しくはＥＯ／プロピレンオキシド（以下「ＰＯ」という）付加物、脂肪酸アルカノールアミド、アルキルポリグリコシド等が挙げられる。特に炭素数が１０〜１６のアルコールのＥＯ１〜１０モル付加物が皮脂汚れの除去、耐硬水性、生分解性の点、及び直鎖アルキルベンゼンスルホン酸塩との相性の点で好ましい。
【００１２】
かかる洗剤粒子群は、公知の方法、例えば水難溶性無機物の一部を除いた主成分を連続ニーダーを用いて捏和・混合し、得られた捏和物と残部の水難溶性無機物とを粉砕機に投入して粉砕することにより得ることができる。そして、得られた洗剤粒子群を篩い分けすることによって所定の平均粒径分布を有する洗剤粒子群を得ることができる。なお、連続ニーダーとしては、例えば、栗本鉄工所製ＫＲＣ２型、粉砕機としてはホソカワミクロン製ＤＫＡＳＯ６型等が好適例である。
【００１３】
２）態様２
本態様の洗剤粒子群の平均粒径は、ペースト化による溶解遅延の防止及び洗剤粒子の溶解性の向上の観点から１５０〜７００μｍであり、１８０〜６００μｍが好ましく、１８０〜５００μｍがより好ましい。
【００１４】
本態様の洗剤粒子群はベース顆粒に界面活性剤が担持されてなる構造である。ベース顆粒は水難溶性無機物と、水溶性ポリマー及び水溶性塩類から選ばれる一種以上を含有してなり、特に水溶性ポリマー及び水溶性塩類を含有してなるベース顆粒が、溶解性の観点からより好ましい。
【００１５】
次に、洗剤粒子を構成する成分について述べる。
水難溶性無機物としては、一次粒子の平均粒径が０．１〜２０μｍのものが好ましい。具体的な物質としては、結晶性又は非晶質のアルミノケイ酸塩、二酸化ケイ素、水和ケイ酸化合物、パーライト、ベントナイト等の粘土化合物等が挙げられる。中でも金属イオン封鎖能及び界面活性剤の吸油能の点で結晶性アルミノケイ酸塩が好ましい。
【００１６】
水溶性ポリマーとしては、カルボン酸系ポリマー、カルボキシメチルセルロース、可溶性澱粉、糖類等が挙げられる。中でも金属イオン封鎖能、固体汚れ・粒子汚れの分散能及び再汚染防止能の点で、分子量が数千〜１０万のカルボン酸系ポリマーが好ましい。特に、アクリル酸−マレイン酸コポリマーの塩とポリアクリル酸塩が好ましい。ここで、塩としてはナトリウム塩、カリウム塩、アンモニウム塩が挙げられる。
【００１７】
水溶性塩類としては、炭酸塩、炭酸水素塩、硫酸塩、亜硫酸塩、硫酸水素塩、塩酸塩、又はリン酸塩等のアルカリ金属塩、アンモニウム塩、又はアミン塩等の水溶性無機塩類や、クエン酸塩やフマル酸塩等の低分子量の水溶性有機酸塩が挙げられる。該水溶性塩類を配合することは、該水溶性塩類と水との反応で生じた水和熱、溶解熱により、洗剤粒子から発生する気泡を熱膨張させ、それにより粒子の崩壊性を促進できる点でより好ましい。
【００１８】
ベース顆粒の組成は、水難溶性無機物、水溶性ポリマー、水溶性塩類のうち二種又は三種の成分を用いることが好ましく、その場合、水難溶性無機物は好ましくは２０〜９０重量％、より好ましくは３０〜７５重量％、特に好ましくは４０〜７０重量％である。水溶性ポリマーは好ましくは２〜３０重量％、より好ましくは３〜２０重量％、特に好ましくは５〜２０重量％である。水溶性塩類は好ましくは５〜７８重量％、より好ましくは１０〜７０重量％、特に好ましくは２０〜６０重量％である。これらの範囲内であれば、ベース顆粒の構造は水溶性ポリマー及び／又は水溶性塩類がベース顆粒の内部よりも表面近傍に多く偏在した構造となる。このような偏在性を示すベース顆粒は、水中で表面近傍の水溶性成分が速やかに溶解して、それにより洗剤粒子表面からの洗剤粒子の崩壊を促進するという溶解挙動を示す。そのために、かかるベース顆粒により高速溶解性が実現され、さらに溶解性に優れた洗剤粒子群を得ることができる。
【００１９】
ベース顆粒の構造の偏在性の確認は、例えば、フーリエ変換赤外分光法（ＦＴ−ＩＲ）や光音響分光法（ＰＡＳ）を併用する方法（ＦＴ−ＩＲ／ＰＡＳ）を用いて行うことができる。これは、APPLIED SPECTROSCOPY vol.47 、1311-1316(1993) に記載のとおり、ベース顆粒の表面から深さ方向における物質の分布状態を解析する方法であり、それにより偏在性を確認することができる。
担持させる界面活性剤としては、態様１に記載のものと同様の界面活性剤が挙げられる。
【００２０】
ベース顆粒に担持させる界面活性剤の量としては、洗浄力の点で、ベース顆粒１００重量部に対して５〜８０重量部が好ましく、５〜６０重量部がより好ましく、１０〜６０重量部がさらに好ましく、２０〜６０重量部が特に好ましい。ベース顆粒に陰イオン界面活性剤を担持させることにより、上記の偏在性を維持しつつ多量の界面活性剤を配合することができる。
【００２１】
かかる洗剤粒子群の調製には、まず、ベース顆粒を構成する成分を含有するスラリーを調製する。次いで、スラリーを噴霧乾燥に付してベース顆粒を得る。噴霧乾燥により、ベース顆粒を構成する成分のうちの水溶性成分が水分の蒸発に伴ってベース顆粒表面に移動する。そのために、ベース顆粒は偏在性を示すことになる。
次いで、得られたベース顆粒と界面活性剤とを公知の混合機に投入することにより、ベース顆粒に界面活性剤を担持させることができる。
【００２２】
本発明の洗剤粒子群には、衣料用洗剤の分野で公知のビルダー、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、還元剤（亜硫酸塩等）、蛍光増白剤、抑泡剤（シリコーン等）、香料等を含有させることができる。
【００２３】
また、粒子の流動性及び非ケーキング性向上の観点から、本発明の高嵩密度洗剤粒子群と表面被覆剤とを混合して表面改質を行っても良い。
表面被覆剤としては、例えば、アルミノケイ酸塩、ケイ酸カルシウム、二酸化ケイ素、ベントナイト、タルク、クレイ、非晶質シリカ誘導体、結晶性シリケート化合物等のシリケート化合物、金属石鹸、粉末の界面活性剤等の微粉体、カルボキシメチルセルロース、ポリエチレングリコール、ポリアクリル酸ソーダ、アクリル酸とマレイン酸のコポリマー又はその塩等のポリカルボン酸塩等の水溶性ポリマー；脂肪酸が挙げられる。
【００２４】
また、本発明は、上記高嵩密度洗剤粒子群を含有してなる洗浄剤組成物に関する。該洗剤粒子群の含有量は、洗浄剤組成物としての溶解性及び洗浄性の点から洗浄剤組成物の５０重量％以上が好ましく、８０重量％以上がより好ましい。
本発明の洗浄剤組成物には、上記洗剤粒子群以外の成分、例えば界面活性剤やビルダー等の公知の洗浄剤基剤、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、還元剤（亜硫酸塩等）、蛍光増白剤、抑泡剤（シリコーン等）、香料等を含有させることもできる。
【００２５】
【実施例】
ベース顆粒の調製
攪拌翼を有した１ｍ3 の混合槽に水４６５ｋｇを加えた。水温が５５℃に達した後に、５０重量％のドデシルベンゼンスルホン酸ナトリウム水溶液２４ｋｇ、４０重量％のアクリル酸−マレイン酸コポリマー（ナトリウム塩）水溶液１５０ｋｇを添加した。１５分間攪拌した後に、炭酸ナトリウム６０ｋｇ、炭酸カリウム６０ｋｇ、硫酸ナトリウム６０ｋｇ、亜硫酸ナトリウム１２ｋｇ、蛍光染料３ｋｇを添加した。１５分間攪拌した後に、ゼオライト３００ｋｇを添加し、３０分間攪拌してスラリーを得た（最終温度は６０℃）。
【００２６】
このスラリーを噴霧乾燥塔に供給し、塔頂より噴霧を行った。ベース顆粒の組成は次のとおりである。ドデシルベンゼンスルホン酸ナトリウム２重量％、アクリル酸−マレイン酸コポリマー（ナトリウム塩）１０重量％、炭酸ナトリウム１０重量％、炭酸カリウム１０重量％、硫酸ナトリウム１０重量％、亜硫酸ナトリウム２重量％、蛍光染料０．５重量％、ゼオライト５０重量％、水５．５重量％。
【００２７】
該ベース顆粒をＦＴ−ＩＲ／ＰＡＳにて解析した結果、顆粒内側はゼオライトの比率が高いこと、水溶性ポリマー及び水溶性塩類は粒子表面近くに多く存在した被覆型の粒子構造を有していること、即ち該ベース顆粒は偏在性を有することが確認された。
【００２８】
次いで、レディデミキサー（松坂技研（株）製、容量２０Ｌ、ジャケット付）に上記ベース顆粒１００重量部を投入し、主軸（１５０ｒｐｍ）とチョッパー（４０００ｒｐｍ）の攪拌を開始した。そこに、炭素数１２〜１６、平均ＥＯ付加モル数７．０のポリオキシエチレンアルキルエーテル１５重量部、ドデシルベンゼンスルホン酸塩（ナトリウム塩：カリウム塩の重量比は５：１）１５重量部、ポリエチレングリコール（平均分子量８５００）１重量部及び水３重量部を加熱混合して得られた７０℃の混合液を３分間で投入し、その後５分間攪拌を行い洗剤粒子群を得た。さらに、結晶性シリケート（ＳＫＳ−６、平均粒径５０μｍ）１０重量部と非晶質アルミノケイ酸塩５重量部とを投入し表面被覆を行った。なお、非晶質アルミノケイ酸塩は、Ａｌ2 Ｏ3 ＝２９．６重量％、ＳｉＯ2 ＝５２．４重量％、Ｎａ2 Ｏ＝１８．０重量％（１．０Ｎａ2 Ｏ・Ａｌ2 Ｏ2 ・３．１０ＳｉＯ2 ）の組成のものであって、そのＣａイオン捕捉能は１８５ＣａＣＯ3 ｍｇ／ｇ、吸油能は２８５ｍＬ／１００ｇ、含有水分量は１１．２重量％であった。次いで、９段の篩と受け皿とからなる分級装置を用いて洗剤粒子群を分級した。得られた洗剤粒子群の物性を表１に示す。
【００２９】
【表１】
得られた洗剤粒子群１００重量部に、酵素０．５重量部と香料０．５重量部を混合して洗浄剤組成物を得た。酵素はセルラーゼＫ（特開昭６３−２６４６９９号公報記載のもの）とリポラーゼ１００Ｔ（ノボ社製）とを３：１の重量比で混合したものを用いた。
【００３１】
得られた洗浄剤組成物を用いて溶解性及び洗浄性を評価した。
溶解性は次のようにして評価した。即ち、内径１０５ｍｍの円柱状の１Ｌビーカーに１０℃の蒸留水１Ｌを入れ、電気伝導度計をセットした。全長３５ｍｍ、直径７．５ｍｍの円柱状攪拌子を用いて５５０ｒｐｍにて攪拌を行った。１０℃の試料１ｇを水の渦中心に投入し、この時点を０秒として、１０秒間隔で電気伝導度を測定した。継続して２分以上測定値が上昇しなくなった値を１００％溶解値として９５％溶解値を算出した。そしてその値に至るまでに要する時間を９５％溶解時間とし、該９５％溶解時間で溶解性を評価した。
【００３２】
洗浄性の評価のための試験は、特開平１０−１６８４８５号公報の第１４欄第６行以降に記載の方法に従って実施した。
【００３３】
その結果、本発明品は、市販されている高嵩密度洗剤組成物（ライオン（株）製ダッシュLot.No.95.02-16C7C）よりも１０℃の溶解時間が格段に短かった。また、洗浄力は同等以上であった。上記市販洗剤の洗剤粒子群の平均粒径は５４４μｍ、７１０μｍ以上の粒径の洗剤粒子及び１２５μｍ未満の粒径の洗剤粒子は洗剤粒子群全体のそれぞれ２５．６重量％、４．０重量％であった。
【００３４】
【発明の効果】
本発明の高嵩密度洗剤粒子群は溶解性が良好であり、低温洗浄条件であっても洗浄力を十分に発揮できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high bulk density detergent particle group.
[0002]
[Prior art]
For the purpose of improving the flowability and appearance of a powder detergent and suppressing the generation of fine powder, a high bulk density detergent particle group having a large average particle diameter is known. However, since the detergent particle group has a longer dissolution time than the low bulk density detergent particle group, there is a concern that the cleaning power may be lowered or undissolved depending on washing conditions such as water temperature and stirring power.
For example, JP-A-5-247497 discloses a detergent composition comprising a group of high bulk density detergent particles having a large average particle diameter, but the solubility and detergency in a low water temperature range are disclosed. It was still not satisfactory.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to provide a high bulk density detergent particle group that is excellent in solubility and detergency under any washing conditions.
[0004]
[Means for Solving the Problems]
That is, the gist of the present invention is as follows.
[1] A high bulk density detergent particle group containing a surfactant, having an average particle size of 150 to 500 μm, a bulk density of 500 g / L or more, and having a particle size of 710 μm or more and a particle size of less than 125 μm High bulk density detergent particles, each having 10% by weight or less of the total detergent particles and a weight ratio of potassium ions to total cations in the detergent particles of 0.05 to 0.6;
[2] An average particle diameter of 150 to 700 μm and a bulk density of 500 g / in which a surfactant is supported on a base granule containing at least one selected from a water-insoluble inorganic substance, a water-soluble polymer and a water-soluble salt. The present invention relates to a high bulk density detergent particle group of L or more, wherein the weight ratio of potassium ions to the total cations in the detergent particle group is 0.05 to 0.6.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The weight ratio of potassium ions to the total cations in the high bulk density detergent particle group of the present invention is 0.05 to 0.6, preferably 0.1 to 0 from the viewpoint of solubility, detergency, fluidity and productivity. .55, more preferably 0.2 to 0.5. Such a weight ratio can be confirmed by an atomic absorption method.
[0006]
Moreover, the bulk density prescribed | regulated by JISK3362 is 500 g / L or more, Preferably it is 500-1000 g / L, More preferably, it is 600-1000 g / L, Most preferably, it is 650-850 g / L.
The amount of water is preferably 20% by weight or less, more preferably 10% by weight or less, and particularly preferably 5% by weight or less of the detergent particle group.
[0007]
As a detergent particle group of this invention, the particle group of the following aspects is preferable, for example.
1) Aspect 1
The average particle diameter of the detergent particle group of this embodiment is 150 to 500 μm, preferably 180 to 400 μm, and more preferably 200 to 300 μm from the viewpoint of preventing dissolution rate delay due to pasting and improving the solubility of the detergent particles. The average particle diameter is a median diameter, and is measured from a weight fraction according to the size of the mesh after vibrating for 5 minutes using a standard sieve of JIS Z 8801.
[0008]
In particular, the detergent particle group of this embodiment has an average particle diameter of 150 to 500 μm in terms of solubility and detergency under washing conditions such as low water temperature and low stirring, and particles having a particle diameter of 710 μm or more are detergent particle groups. 10% by weight or less, preferably 8% by weight or less, particularly preferably 0% by weight, and 10% by weight or less, preferably 8% by weight or less, particularly preferably 0% by weight of particles having a particle size of 125 μm or less A group of particles. The particle size distribution is, for example, a 9-stage sieve in which the openings of each sieve are 2000 μm, 1410 μm, 1000 μm, 710 μm, 500 μm, 355 μm, 250 μm, 180 μm, and 125 μm from the upper part to the lower part of the apparatus, and the openings are It can be determined by classification using a classifier comprising a bottom receiving tray that receives particles passing through a 125 μm sieve.
[0009]
The detergent particle group of this embodiment contains a surfactant such as an anionic surfactant, a nonionic surfactant, an amphoteric surfactant, and a cationic surfactant. The content of the surfactant is preferably 5 to 80% by weight and more preferably 10 to 60% by weight from the viewpoints of detergency, productivity, anti-caking and fluidity.
[0010]
Anionic surfactants include higher alcohol sulfates, higher alcohol ethoxylate sulfates, alkylbenzene sulfonates, paraffin sulfonates, α-olefin sulfonates, α-sulfo fatty acid salts or alkyls thereof. Examples thereof include ester salts and fatty acid salts. Particularly preferred are linear alkylbenzene sulfonates having 10 to 18 carbon atoms, more preferably 12 to 14 carbon atoms, and α-sulfo fatty acid alkyl ester salts having 10 to 20 carbon atoms.
[0011]
Examples of the nonionic surfactant include ethylene oxide (hereinafter referred to as “EO”) adducts of higher alcohols, or EO / propylene oxide (hereinafter referred to as “PO”) adducts, fatty acid alkanolamides, alkyl polyglycosides, and the like. In particular, an EO 1 to 10 mol adduct of an alcohol having 10 to 16 carbon atoms is preferable in terms of removal of sebum soil, hard water resistance, biodegradability, and compatibility with linear alkylbenzene sulfonate.
[0012]
Such detergent particles are kneaded with a known method, for example, kneading and mixing the main component excluding a part of the poorly water-soluble inorganic substance using a continuous kneader, and the resulting poorly water-soluble inorganic substance. And can be obtained by pulverizing. And the detergent particle group which has a predetermined | prescribed average particle size distribution can be obtained by sieving the obtained detergent particle group. Suitable examples of the continuous kneader include KRC type 2 manufactured by Kurimoto Iron Works, and DKASO type 6 manufactured by Hosokawa Micron as the crusher.
[0013]
2) Aspect 2
The average particle size of the detergent particle group of this embodiment is 150 to 700 μm, preferably 180 to 600 μm, and more preferably 180 to 500 μm from the viewpoint of preventing dissolution delay due to pasting and improving the solubility of the detergent particles.
[0014]
The detergent particle group of this embodiment has a structure in which a surfactant is supported on base granules. The base granule contains a hardly water-soluble inorganic substance and one or more selected from a water-soluble polymer and a water-soluble salt, and in particular, a base granule containing a water-soluble polymer and a water-soluble salt is more preferable from the viewpoint of solubility. .
[0015]
Next, components constituting the detergent particles will be described.
As the poorly water-soluble inorganic substance, those having an average primary particle diameter of 0.1 to 20 μm are preferable. Specific examples of the material include crystalline or amorphous aluminosilicates, silicon dioxide, hydrated silicate compounds, clay compounds such as perlite and bentonite. Of these, crystalline aluminosilicate is preferable in terms of sequestering ability and surfactant oil absorption ability.
[0016]
Examples of the water-soluble polymer include carboxylic acid polymers, carboxymethyl cellulose, soluble starch, saccharides and the like. Among them, a carboxylic acid polymer having a molecular weight of several thousand to 100,000 is preferable in terms of sequestering ability, dispersibility of solid dirt / particle dirt, and ability to prevent recontamination. Particularly preferred are salts of acrylic acid-maleic acid copolymers and polyacrylates. Here, examples of the salt include sodium salt, potassium salt, and ammonium salt.
[0017]
Water-soluble salts include carbonates, bicarbonates, sulfates, sulfites, hydrogen sulfates, hydrochlorides, phosphates, and other alkali metal salts, ammonium salts, amine salts, and other water-soluble inorganic salts, Low molecular weight water-soluble organic acid salts such as citrate and fumarate are listed. By blending the water-soluble salts, the bubbles generated from the detergent particles are thermally expanded by the heat of hydration and the heat of dissolution generated by the reaction of the water-soluble salts and water, thereby promoting the disintegration of the particles. More preferable in terms.
[0018]
As the composition of the base granule, it is preferable to use two or three kinds of components among poorly water-soluble inorganic substances, water-soluble polymers, and water-soluble salts. In that case, the water-insoluble inorganic substances are preferably 20 to 90% by weight, more preferably 30%. It is -75 weight%, Most preferably, it is 40-70 weight%. The water-soluble polymer is preferably 2 to 30% by weight, more preferably 3 to 20% by weight, and particularly preferably 5 to 20% by weight. The water-soluble salt is preferably 5 to 78% by weight, more preferably 10 to 70% by weight, and particularly preferably 20 to 60% by weight. Within these ranges, the structure of the base granule becomes a structure in which water-soluble polymers and / or water-soluble salts are more unevenly distributed near the surface than inside the base granule. The base granule exhibiting such uneven distribution exhibits a dissolution behavior in which water-soluble components in the vicinity of the surface are rapidly dissolved in water, thereby promoting the disintegration of the detergent particles from the surface of the detergent particles. Therefore, the base granule achieves high-speed solubility, and can further obtain a detergent particle group having excellent solubility.
[0019]
Confirmation of the uneven distribution of the structure of the base granule can be performed using, for example, a method (FT-IR / PAS) in combination with Fourier transform infrared spectroscopy (FT-IR) or photoacoustic spectroscopy (PAS). . As described in APPLIED SPECTROSCOPY vol.47, 1311-1316 (1993), this is a method for analyzing the distribution state of substances in the depth direction from the surface of the base granule, whereby the uneven distribution can be confirmed. .
Examples of the surfactant to be supported include the same surfactants as those described in Aspect 1.
[0020]
The amount of the surfactant to be supported on the base granule is preferably 5 to 80 parts by weight, more preferably 5 to 60 parts by weight, and more preferably 10 to 60 parts by weight with respect to 100 parts by weight of the base granule in terms of detergency. More preferred is 20 to 60 parts by weight. By supporting an anionic surfactant on the base granule, a large amount of surfactant can be blended while maintaining the above-mentioned uneven distribution.
[0021]
In order to prepare such detergent particles, first, a slurry containing the components constituting the base granule is prepared. The slurry is then subjected to spray drying to obtain base granules. By spray drying, the water-soluble component of the components constituting the base granule moves to the surface of the base granule as the moisture evaporates. For this reason, the base granule is unevenly distributed.
Subsequently, the obtained base granule and the surfactant are put into a known mixer, whereby the surfactant can be supported on the base granule.
[0022]
The detergent particles of the present invention include builders, bleaches (percarbonates, perborate, bleach activators, etc.), recontamination inhibitors (carboxymethylcellulose, etc.), softening agents known in the field of garment detergents. Agents, reducing agents (sulfites, etc.), fluorescent brighteners, foam inhibitors (silicones, etc.), fragrances, and the like can be included.
[0023]
Further, from the viewpoint of improving the fluidity and non-caking property of the particles, the surface modification may be performed by mixing the high bulk density detergent particle group of the present invention and the surface coating agent.
Examples of the surface coating agent include aluminosilicates, calcium silicates, silicon dioxide, bentonite, talc, clay, amorphous silica derivatives, crystalline silicate compounds such as silicate compounds, metal soaps, powder surfactants, etc. Water-soluble polymers such as fine powders, carboxymethylcellulose, polyethylene glycol, sodium polyacrylate, polycarboxylic acid salts such as copolymers of acrylic acid and maleic acid or salts thereof; and fatty acids.
[0024]
Moreover, this invention relates to the cleaning composition formed by containing the said high bulk density detergent particle group. The content of the detergent particles is preferably 50% by weight or more, more preferably 80% by weight or more of the cleaning composition from the viewpoint of solubility and cleaning properties as the cleaning composition.
In the cleaning composition of the present invention, components other than the detergent particles, for example, known cleaning agent bases such as surfactants and builders, bleaching agents (percarbonate, perborate, bleaching activator, etc.) ), Anti-staining agent (carboxymethylcellulose and the like), softening agent, reducing agent (sulfite and the like), fluorescent whitening agent, foam suppressant (silicone and the like), fragrance and the like.
[0025]
【Example】
Preparation of base granules 465 kg of water was added to a 1 m 3 mixing vessel equipped with a stirring blade. After the water temperature reached 55 ° C., 24 kg of 50% by weight aqueous sodium dodecylbenzenesulfonate solution and 150 kg of 40% by weight aqueous acrylic acid-maleic acid copolymer (sodium salt) solution were added. After stirring for 15 minutes, 60 kg of sodium carbonate, 60 kg of potassium carbonate, 60 kg of sodium sulfate, 12 kg of sodium sulfite and 3 kg of fluorescent dye were added. After stirring for 15 minutes, 300 kg of zeolite was added and stirred for 30 minutes to obtain a slurry (final temperature was 60 ° C.).
[0026]
This slurry was supplied to the spray drying tower and sprayed from the top. The composition of the base granule is as follows. Sodium dodecylbenzenesulfonate 2% by weight, acrylic acid-maleic acid copolymer (sodium salt) 10% by weight, sodium carbonate 10% by weight, potassium carbonate 10% by weight, sodium sulfate 10% by weight, sodium sulfite 2% by weight, fluorescent dye 0 0.5% by weight, zeolite 50% by weight, water 5.5% by weight.
[0027]
As a result of analyzing the base granule by FT-IR / PAS, the inside of the granule has a high zeolite ratio, and the water-soluble polymer and water-soluble salts have a coated particle structure in which many particles exist near the particle surface. That is, it was confirmed that the base granule has uneven distribution.
[0028]
Next, 100 parts by weight of the base granule was put into a ready demixer (manufactured by Matsuzaka Giken Co., Ltd., capacity 20 L, with jacket), and stirring of the main shaft (150 rpm) and chopper (4000 rpm) was started. There, 15 parts by weight of polyoxyethylene alkyl ether having 12 to 16 carbon atoms and an average EO addition mole number of 7.0, 15 parts by weight of dodecylbenzenesulfonate (sodium salt: potassium salt weight ratio is 5: 1), A mixed solution at 70 ° C. obtained by heating and mixing 1 part by weight of polyethylene glycol (average molecular weight 8500) and 3 parts by weight of water was charged in 3 minutes, and then stirred for 5 minutes to obtain a detergent particle group. Further, 10 parts by weight of crystalline silicate (SKS-6, average particle size 50 μm) and 5 parts by weight of amorphous aluminosilicate were added to perform surface coating. The amorphous aluminosilicate is composed of Al 2 O 3 = 29.6 wt%, SiO 2 = 52.4 wt%, Na 2 O = 18.0 wt% (1.0 Na 2 O · Al 2 O 2 · 3.10SiO 2) be of composition, the Ca ion trapping ability is 185CaCO 3 mg / g, the oil-absorbing ability 285 mL / 100 g, the water content was 11.2 wt%. Next, the detergent particles were classified using a classifier comprising a 9-stage sieve and a tray. Table 1 shows the physical properties of the obtained detergent particles.
[0029]
[Table 1]
A detergent composition was obtained by mixing 100 parts by weight of the obtained detergent particle group with 0.5 parts by weight of enzyme and 0.5 parts by weight of fragrance. The enzyme used was a mixture of cellulase K (described in JP-A 63-264699) and lipolase 100T (manufactured by Novo) at a weight ratio of 3: 1.
[0031]
Solubility and detergency were evaluated using the obtained detergent composition.
The solubility was evaluated as follows. That is, 1 L of distilled water at 10 ° C. was placed in a cylindrical 1 L beaker having an inner diameter of 105 mm, and an electric conductivity meter was set. Stirring was performed at 550 rpm using a cylindrical stirring bar having a total length of 35 mm and a diameter of 7.5 mm. 1 g of a sample at 10 ° C. was put into the vortex center of water, and the electrical conductivity was measured at intervals of 10 seconds with this time as 0 second. The 95% dissolution value was calculated by taking the value at which the measured value did not increase continuously for 2 minutes or more as the 100% dissolution value. The time required to reach this value was taken as 95% dissolution time, and the solubility was evaluated based on the 95% dissolution time.
[0032]
The test for evaluating the cleaning performance was carried out according to the method described in JP-A-10-168485, column 14, line 6 and thereafter.
[0033]
As a result, the dissolution time at 10 ° C. of the product of the present invention was much shorter than that of a commercially available high bulk density detergent composition (Dash Lot No. 95.02-16C7C manufactured by Lion Corporation). Moreover, the cleaning power was equivalent or better. The average particle size of the detergent particles of the above commercial detergent is 544 μm, the detergent particles having a particle size of 710 μm or more and the detergent particles having a particle size of less than 125 μm are 25.6% by weight and 4.0% by weight, respectively. there were.
[0034]
【The invention's effect】
The high bulk density detergent particle group of the present invention has good solubility, and can sufficiently exert the cleaning power even under low temperature cleaning conditions.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37311698A JP4063431B2 (en) | 1998-12-28 | 1998-12-28 | High bulk density detergent particles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37311698A JP4063431B2 (en) | 1998-12-28 | 1998-12-28 | High bulk density detergent particles |
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| JP2000192096A JP2000192096A (en) | 2000-07-11 |
| JP4063431B2 true JP4063431B2 (en) | 2008-03-19 |
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| JP37311698A Expired - Fee Related JP4063431B2 (en) | 1998-12-28 | 1998-12-28 | High bulk density detergent particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003129099A (en) * | 2001-10-24 | 2003-05-08 | Kao Corp | Powdered detergent composition for clothing |
| DE102006016578A1 (en) * | 2006-04-06 | 2007-10-11 | Henkel Kgaa | Solid textile softening composition with a water-soluble polymer |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3444960A1 (en) * | 1984-12-10 | 1986-06-12 | Henkel KGaA, 4000 Düsseldorf | GRAINY ADSORPTION |
| JPH0639599B2 (en) * | 1985-06-27 | 1994-05-25 | ライオン株式会社 | Method for producing high bulk density detergent composition |
| DE3818829A1 (en) * | 1988-06-03 | 1989-12-14 | Henkel Kgaa | KOENIGES ADSORPTIONSMITTEL WITH IMPROVED SPOONING BEHAVIOR |
| JP2951743B2 (en) * | 1991-05-09 | 1999-09-20 | 花王株式会社 | Method for producing high bulk density granular detergent |
| JP2962595B2 (en) * | 1991-06-04 | 1999-10-12 | ライオン株式会社 | Method for producing high bulk density detergent composition |
| JP2954425B2 (en) * | 1992-06-22 | 1999-09-27 | 花王株式会社 | Method for producing high-density granular detergent composition |
| JP3398183B2 (en) * | 1992-08-20 | 2003-04-21 | 花王株式会社 | Packaged detergent using water-soluble film |
| JPH0813000A (en) * | 1994-06-28 | 1996-01-16 | Lion Corp | Production of granular detergent composition having high bulk density |
| JPH0927194A (en) * | 1995-07-07 | 1997-01-28 | Seiko Epson Corp | Semiconductor memory |
| JP3367801B2 (en) * | 1995-10-03 | 2003-01-20 | 花王株式会社 | Method for producing high bulk density granular detergent and high bulk density granular detergent particles |
| JP3616234B2 (en) * | 1997-07-17 | 2005-02-02 | 花王株式会社 | High density granular detergent |
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