(19)
(11)EP 3 500 658 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
15.12.2021 Bulletin 2021/50

(21)Application number: 17752389.1

(22)Date of filing:  16.08.2017
(51)International Patent Classification (IPC): 
C11D 9/10(2006.01)
C11D 17/00(2006.01)
C11D 9/44(2006.01)
C11D 13/18(2006.01)
C11D 13/08(2006.01)
C11D 9/26(2006.01)
C11D 9/00(2006.01)
C11D 13/10(2006.01)
C11D 13/22(2006.01)
(52)Cooperative Patent Classification (CPC):
C11D 9/10; C11D 13/18; C11D 13/08; C11D 9/442; C11D 9/262; C11D 9/007; C11D 13/22; C11D 9/444; C11D 17/006; C11D 13/10
(86)International application number:
PCT/EP2017/070761
(87)International publication number:
WO 2018/033571 (22.02.2018 Gazette  2018/08)

(54)

WATER SOLUBLE PELLET AND METHOD FOR MANUFACTURING SAID WATER SOLUBLE PELLET

WASSERLÖSLICHES PELLET UND VERFAHREN ZUR HERSTELLUNG DES BESAGTEN WASSERLÖSLICHEN PELLETS

PASTILLE SOLUBLE DANS L'EAU ET PROCÉDÉ DE FABRICATION DE LADITE PASTILLE SOLUBLE DANS L'EAU


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 17.08.2016 EP 16184485

(43)Date of publication of application:
26.06.2019 Bulletin 2019/26

(73)Proprietor: Zobele Holding S.P.A.
38100 Trento (IT)

(72)Inventors:
  • DEFLORIAN, Stefano
    38100 Trento (IT)
  • MORHAIN, Cedric
    38100 Trento (IT)
  • CARRARA, Giovanni
    38100 Trento (IT)
  • GARAVAGLIA, Silvano
    38100 Trento (IT)

(74)Representative: Herrero & Asociados, S.L. 
Cedaceros, 1
28014 Madrid
28014 Madrid (ES)


(56)References cited: : 
WO-A1-2010/022775
US-A- 3 793 214
WO-A2-2013/184981
US-A1- 2009 099 055
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The present invention refers to a water soluble pellet and to a method for manufacturing said water soluble pellet, said pellet being able to dissolve in water fast enough to enable the release of one or more actives during product application.

    Background of the invention



    [0002] It is currently known that some consumers prefer to control the amount of fragrance or perfume added to their laundry independently from the amount of detergent that is used in the washing machine.

    [0003] This is normally achieved through the use of fabric softeners based on ester quats which are added at a rinse stage, but they have some drawbacks.

    [0004] For example, these softeners cause the deposition of lime residues through the rinse, they over time accumulate on fabrics and interact negatively with detergent anionic surfactants, which may limit the water absorption of towels, and fabric softeners cause unpleasant deposit in the dispenser of the washing machine.

    [0005] US2009099055A1 discloses a solid textile-care composition having a matrix of soap and, distributed therein, a textile-care compound and a perfume. Also, textile-softening laundry detergents or cleaning agents containing the textile-care composition.

    [0006] US3793214A discloses a transparent soap composition, preferably in the form of a bar, which will maintain its transparency and surface gloss after repeated use comprising an admixture of saturated fatty acids and a branched chain C5-C18 saturated aliphatic monocarboxylic acid neutralized with an agent comprising a mixture of an alkaline sodium compound and an alkanolamine, and an alkanolamine.

    [0007] Therefore, the object of the present invention is to provide a material which solves said drawbacks of the fabric softeners, permitting to protect initially the cloths and then gradually delivering fragrance to the clothes, which can be also manufactured easily in a cost effective way.

    Description of the invention



    [0008] The water soluble pellets based on vegetable soap containing high levels of perfume allow to solve current fabric softener drawbacks presenting other advantages that will be described hereinafter.

    [0009] The water soluble pellets according to the present invention comprises:
    • a vegetable soap carrier in an amount of 10-95 wt%;
    • a perfume oil in an amount of 2-12 wt%;
    • a dye in an amount of 0.001 to 0.5 wt%;
    • water soluble fillers selected from sodium chloride or potassium chloride or calcium chloride; and
    • additives selected from natural cellulose fibers, microcrystalline cellulose, or sodium carboxy methyl cellulose or hydroxypropyl cellulose.


    [0010] Preferably, the pellets according to the present invention comprises perfume capsules in an amount of 0.5-12 wt% and/or an additional water soluble polymer, such as PEG 6000, in an amount of 5-40 wt%.

    [0011] According to preferred embodiments, said vegetable soap carrier is made from coconut, olive, rice or corn oils, said dye is bluemarine (but any other suitable dye can be used), and said perfume capsules are made from melamine formaldehyde.

    [0012] Advantageously, weight of each pellet according to the present invention is from 5 mg to 1 g.

    [0013] According to a second aspect, the invention also refers to a method for manufacturing water soluble pellets as stated previously, comprising the following steps:
    • mixing said composition;
    • extruding said composition; and
    • cutting said extruded composition forming said water soluble pellets.


    [0014] The water soluble pellet according to the present invention protects initially and then gradually delivers fragrance to the cloths, improving the freshness as per consumer desire, while eliminating the above described drawbacks of fabric softeners.

    [0015] Furthermore, using the method according to the present invention the pellets can be manufactured in a cost effective way via a suitable extruder that allows to mix ingredients together and extrude them to desired shape and dimensions.

    [0016] The pellets according to the invention are made by vegetable soap as main water soluble carrier, additional water soluble polymeric carriers and one or more active ingredients. These are homogenously mixed and extruded in pellet of different shapes and dimensions, solid at room temperature.

    [0017] The pellets are able to dissolve in water fast enough to enable the release of one or more actives during product application.

    [0018] As first application, we can make vegetable pellets containing high level of perfume oil and encapsulated perfume to be used as fragrance booster for laundry applications.

    [0019] This will enable to delight consumers with the level of fragrance they want on fabrics without the drawback of the current fabric softeners.

    Description of a preferred embodiment



    [0020] According to the invention, the pellet according to claim 1 is soluble in water at 30°C under 500 rpm stirring simulating washing machine conditions in less than 20 minutes, preferably less than 10 minutes, and even more preferably less than 5 minutes.

    [0021] A working example is:
    • Coconut soap beads: 92.95 wt%
    • Perfume oil: 5 wt%
    • Perfume capsules (made preferably from melamine formaldehyde shell): 2 wt%
    • Dye (such as bluemarine): 0.05 wt%


    [0022] It must be pointed out that instead of coconut, rice, corn or olive can also be used, or any suitable vegetable soap.

    [0023] The above materials are mixed together via an extruder and delivered in the form of solid pellets of mass 5 mg to 1 g each. It must be pointed out that the normal dose per wash in a washing machine would be between 10 grams and 25 grams formed by a plurality of pellets.

    [0024] This material has been tested for water solubility according to the following protocol:
    • pour into a beaker about 50 ml of water;
    • warm up it until get 30°C:
    • put about 250 mg of pellets into the beaker mixing continuously at 500 rpm via magnetic stirrer;
    • wait until all the pellet is dissolved.


    [0025] We demonstrated that these water soluble pellets dissolve completely in less than 5 minutes.

    [0026] The use of the extruder allows to provide a shape to the final pellets in the form of stars, hearths, flowers or any other 2D object shape, which can be implemented to the nozzle of the extruder.

    [0027] This allows to design the shape which best fit with the perfume fragrance and/or the brand/artwork design, making enjoyable the consumer experience.

    [0028] Furthermore, the extrusion allows producing pellets with a skin/core structure, and surface hardness allows pellets to be extruded without sticking on themselves during their production and storage.

    [0029] Additionally, some of the vegetable soap polymer should provide softness effect to fabrics but avoiding drawbacks of fabric usual softeners.

    [0030] An alternative working example is:
    • Coconut soap beads: 70 wt%
    • Palm soap: 20 wt%
    • Perfume oil: 7 wt%
    • Perfume capsules (made preferably from melamine formaldehyde shell): 2.95 wt%
    • Dye (pink from millkan): 0.05 wt%


    [0031] The use of a second vegetable soap as palm soap or olive soap can help tailoring: 1) mechanical or surface properties of the final pellets, and/or 2) the solubility properties and/or improve the extrusion process.

    [0032] A third working example is:
    • Coconut soap beads: 60 wt%
    • PEG 6000: 30 wt%
    • Perfume oil: 7 wt%
    • Perfume capsules (made preferably from melamine formaldehyde shell): 2-95 wt%
    • Dye (pink from millkan): 0.05 wt%


    [0033] In the third working example, the water soluble polymer is added to improve flowability during process (e.g. polyethylene glycol (PEG) 6000) (5 to 40 wt%).

    [0034] PEG addition allows to improve mechanical properties, as well as to help better mixing of the fragrance in the material.

    [0035] In the composition of the water soluble pellets according to the present invention, other fabric care active ingredient components can be added to be released through the wash together or alternatively to perfume providing consumer fabrics with additional benefits. These actives could be but not limited to stain removal ingredients, whitening agents as huying dyes and optical brighteners, lime removals additive, color care ingredients, softener agents, anti-wrinkles polymers, etc.

    [0036] Additionally, the water soluble pellets made of vegetable soap could be used for release of actives in contact with water in other categories as for example in personal care (shampoo, conditioners, skin care, etc.).

    [0037] Additionally, some other kind of additives could be added to the formulation. On one side, some additives can be added with the purpose to make the pellets less sticky and make the dosification by the user easier. For example, moisture absorbent additive such as Sodium sulfate or magnesium sulfate can be used.

    [0038] With the purpose of making the pellets less sticky, the compositions according to present invention comprise water soluble fillers selected from sodium chloride or potassium chloride or calcium chloride.

    [0039] Finally, to make dissolution during the washing cycle faster, the compositions according to present invention comprise additives selected from natural cellulose fibers, microcrystalline cellulose, or sodium carboxy methyl cellulose or hydroxypropyl cellulose.

    [0040] A working example with these kinds of additives is:

    Coconut soap 48%

    Sodium Sulfate 20%

    Sodium Chloride 15%

    Microcystalline cellulose 10%

    Fragrance 4%

    Microcapsules 3%



    [0041] In addition to that, typical stabilizer/antioxidants additives can be added in order to stabilize the formulation and avoid its degradation with time.

    [0042] Even though reference is made to a specific embodiment of the invention, it is clear for a person skilled in the art that the disclosed pellets and method are susceptible of variations and modifications, and that all the details cited can be substituted by other technically equivalent ones, without departing from the scope of protection defined by the attached claims.


    Claims

    1. Water soluble pellet for releasing one or more actives, comprising:

    - a vegetable soap carrier in an amount of 10-95 wt%;

    - a perfume oil in an amount of 2-12 wt%; and

    - a dye in an amount of 0.001 to 0.5 wt%,

    characterized in that it also comprises:

    water soluble fillers selected from sodium chloride or potassium chloride or calcium chloride, and

    additives selected from natural cellulose fibers, microcrystalline cellulose, or sodium carboxy methyl cellulose or hydroxypropyl cellulose.


     
    2. Water soluble pellet according to claim 1, wherein it also comprises perfume capsules in an amount of 0.5-12 wt%.
     
    3. Water soluble pellet according to claim 1 or 2, wherein it also comprises a water soluble polymer in an amount of 5-40 wt%.
     
    4. Water soluble pellet according to claim 1, wherein said vegetable soap carrier is made from coconut, olive, rice or corn soaps or a mixture of two or more of them.
     
    5. Water soluble pellet according to claim 2, wherein said perfume capsules are made from melamine formaldehyde.
     
    6. Water soluble pellet according to claim 1, wherein its weight is from 5 mg to 1 g.
     
    7. Water soluble pellet according to claim 3, wherein said water soluble polymer is polyethylene glycol.
     
    8. Method for manufacturing water soluble pellet according to any one of claims 1-7,
    characterized in that it comprises the following steps:

    - mixing a composition according to any one of claims 1-7;

    - extruding said composition; and

    - cutting said extruded composition forming said water soluble pellets.


     


    Ansprüche

    1. Wasserlösliches Pellet zur Freisetzung eines oder mehrerer aktive Inhaltsstoffe, umfassend:

    - einen pflanzlichen Seifenträger in einer Menge von 10-95 Gew%;

    - ein Parfümöl in einer Menge von 2-12 Gew%; und

    - einen Farbstoff in einer Menge von 0,001 bis 0,5 Gew%,

    dadurch gekennzeichnet, dass es auch umfasst:
    wasserlösliche Füllstoffe ausgewählt aus Natriumchlorid oder Kaliumchlorid oder Kalziumchlorid, und Zusatzstoffe ausgewählt aus natürlichen Zellulosefasern, mikrokristalliner Zellulose, oder Natriumcarboxymethylzellulose oder Hydroxypropylzellulose.
     
    2. Wasserlösliches Pellet nach Anspruch 1, wobei es auch Parfümkapseln in einer Menge von 0,5-12 Gew% umfasst.
     
    3. Wasserlösliches Pellet nach Anspruch 1 oder 2, wobei es auch ein wasserlösliches Polymer in einer Menge von 5-40 Gew% umfasst.
     
    4. Wasserlösliches Pellet nach Anspruch 1, wobei der pflanzliche Seifenträger aus Kokosnuss-, Oliven-, Reis- oder Mais-Seifen oder einem Gemisch von zweien oder mehreren dieser hergestellt ist.
     
    5. Wasserlösliches Pellet nach Anspruch 2, wobei die Parfümkapseln aus Melaminformaldehyd hergestellt sind.
     
    6. Wasserlösliches Pellet nach Anspruch 1, wobei dessen Gewicht von 5 mg bis 1 g beträgt.
     
    7. Wasserlösliches Pellet nach Anspruch 3, wobei das wasserlösliche Polymer Polyethylenglykol ist.
     
    8. Verfahren zur Herstellung eines wasserlösliches Pellet nach einem der Ansprüche 1-7, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:

    - Mischen einer Zusammensetzung nach einem der Ansprüche 1-7;

    - Extrudieren der Zusammensetzung; und

    - Schneiden der extrudierten Zusammensetzung, wobei die wasserlöslichen Pellets gebildet werden.


     


    Revendications

    1. Pastille soluble dans l'eau destinée à libérer un ou plusieurs agents actifs, comprenant :

    - un support de savon végétal dans une quantité de 10 à 95 % en poids ;

    - un parfum huileux dans une quantité de 2 à 12 % en poids ; et

    - un colorant dans une quantité de 0,001 à 0,5 % en poids ;

    caractérisée en ce qu'elle comprend également :

    des charges solubles dans l'eau choisies parmi le chlorure de sodium ou le chlorure de potassium ou le chlorure de calcium, et

    des additifs choisis parmi les fibres de cellulose naturelle, la cellulose microcristalline, ou la carboxyméthylcellulose de sodium ou l'hydroxypropylcellulose.


     
    2. Pastille soluble dans l'eau selon la revendication 1, dans laquelle elle comprend également des capsules de parfum dans une quantité de 0,5 à 12 % en poids.
     
    3. Pastille soluble dans l'eau selon la revendication 1 ou 2, dans laquelle elle comprend également un polymère soluble dans l'eau dans une quantité de 5 à 40 % en poids.
     
    4. Pastille soluble dans l'eau selon la revendication 1, dans laquelle ledit support de savon végétal est constitué de savons de noix de coco, d'olive, de riz ou de maïs ou d'un mélange de deux ou plus de ceux-ci.
     
    5. Pastille soluble dans l'eau selon la revendication 2, dans laquelle lesdites capsules de parfum sont constituées de mélamine-formaldéhyde.
     
    6. Pastille soluble dans l'eau selon la revendication 1, dans laquelle son poids est de 5 mg à 1 g.
     
    7. Pastille soluble dans l'eau selon la revendication 3, dans laquelle ledit polymère soluble dans l'eau est le polyéthylène glycol.
     
    8. Procédé de fabrication d'une pastille soluble dans l'eau selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend les étapes suivantes :

    - le mélange d'une composition selon l'une quelconque des revendications 1 à 7 ;

    - l'extrusion de ladite composition ; et

    - la découpe de ladite composition extrudée pour former lesdites pastilles solubles dans l'eau.


     






    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description