Search

EP-4735571-A1 - LAUNDRY COMPOSITION

EP4735571A1EP 4735571 A1EP4735571 A1EP 4735571A1EP-4735571-A1

Abstract

A solid fragrance booster composition comprising: a) 30 to 88 wt.% Sodium carbonate; b) 10 to 49 wt.% water; and c) 0.1 to 20 wt.% perfume; wherein the ratio of sodium carbonate to water is 1:1 to 3:1.

Inventors

  • PATHAK, GAURAV
  • RAJENDIRAN, Ganesan
  • SYED, Shah Faisal
  • THIRUMENI, Dhanalakshmi

Assignees

  • Unilever IP Holdings B.V.
  • Unilever Global IP Limited

Dates

Publication Date
20260506
Application Date
20240606

Claims (14)

  1. 1. A solid fragrance booster composition comprising: a 30 to 88 wt.% Sodium carbonate; b 10 to 49 wt.% water; and c 0.1 to 20 wt.% perfume; Wherein the ratio of sodium carbonate to water is 1 :1 to 3:1.
  2. 2. A solid fragrance booster composition according to claim 1, wherein the composition further comprises perfume microcapsules.
  3. 3. A solid fragrance booster composition according to any preceding claim, wherein the composition comprises 1 to 40 wt.% additional inorganic salt.
  4. 4. A solid fragrance booster composition according to claim 3, wherein the additional inorganic salt is selected from: selected from divalent and trivalent metal salts of sulphate, chlorides, nitrides and the respective hydrates.
  5. 5. A solid fragrance booster composition according to any preceding claim, wherein the composition further comprises soap.
  6. 6. A solid fragrance booster composition according to any preceding claim, wherein the composition further comprises optical enhancer is selected from pearlisers, dyes, colourants, pigments or combinations thereof.
  7. 7. A solid fragrance booster composition according to any preceding claim, wherein the sodium carbonate has a poured bulk density of less than 1000 kg/m 3 .
  8. 8. A solid fragrance booster composition according to any preceding claim, wherein the composition comprises multiple solid fragrance booster particles.
  9. 9. A solid fragrance booster composition according to claim 8, wherein the particles have a maximum linear dimension of 1 mm to 20 mm.
  10. 10. A solid fragrance booster composition according to claim 8, wherein the particles have a minimum linear dimension of 0.1 mm to 10mm.
  11. 11. A solid fragrance booster composition according to claims 1 to 7, wherein the composition comprises a single unit dose solid fragrance booster particle.
  12. 12. A solid fragrance booster composition according to claim 11 , wherein the particle has a maximum linear dimension of 60 mm and minimum linear dimension of 5 mm.
  13. 13. A method of preparing the solid fragrance boosters according to claim 1, wherein the composition is formed using a process selected from: extrusion, tableting, granulation, casting, pelletising, pastillation or a compression method.
  14. 14. Use of solid fragrance booster composition according to any preceding claim to deliver fragrance in the laundry process.

Description

LAUNDRY COMPOSITION Field of the Invention The present invention is in the field of solid fragrance boosters for providing fragrance in the laundry process. Background of the Invention Solid fragrance boosters are known in the field of laundry. In particular solid fragrance boosters based on polyethylene glycol have been disclosed, for example EP 2 496679 discloses pastilles comprising from 80 % to 91 % by weight of said composition of polyethylene glycol. However there remains a need to improve theses solid boosters. Two particular problems that the consumers experience are poor dissolution, which leads to residues on fabrics and poor structural integrity which leads to the solid boosters crumbling in the packaging. This provides an ongoing challenge because increasing the strength of solid boosters commonly leads to in increased dissolution time. Summary of the Invention It has been found that using hydrated sodium carbonate provides fragrance boosters with both improved strength and improved dissolution. According in a first aspect of the present invention is provided a solid fragrance booster composition comprising: a 30 to 88 wt.% Sodium carbonate; b 10 to 49 wt.% water; and c 0.1 to 20 wt.% perfume; wherein the ratio of sodium carbonate to water is 1 :1 to 3:1. Also provided is a method of preparing the solid fragrance boosters described here wherein the composition is formed using a process selected from: extrusion, tableting, granulation, casting, pelletising, pastillation or a compression method. In a further aspect of the present invention is provided a use of solid fragrance booster composition as described herein to deliver fragrance in the laundry process. Detailed Description of the Invention These and other aspects, features and advantages will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims. For the avoidance of doubt, any feature of one aspect of the present invention may be utilised in any other aspect of the invention. The word “comprising” is intended to mean “including” but not necessarily “consisting of’ or “composed of.” In other words, the listed steps or options need not be exhaustive. It is noted that the examples given in the description below are intended to clarify the invention and are not intended to limit the invention to those examples per se. Similarly, all percentages are weight/weight percentages unless otherwise indicated. Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material or conditions of reaction, physical properties of materials and/or use are to be understood as modified by the word “about”. Numerical ranges expressed in the format "from x to y" are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format "from x to y", it is understood that all ranges combining the different endpoints are also contemplated. A “Solid fragrance booster particle” refers to an individual article. A “Solid fragrance booster composition” refers to one or more solid fragrance booster particles. The solid fragrance booster composition described herein comprises sodium carbonate (Na2COs), also known as soda ash. The solid fragrance booster composition comprises 30 to 88 wt.% sodium carbonate by weight of the composition, more preferably 35 to 80 wt.% and most preferably 40 to 75 wt.% sodium carbonate by weight of the composition. The sodium carbonate may be hydrated once it is mixed with the water to form, e.g. sodium monohydrate, sodium heptahydrate or sodium decahydrate. The sodium carbonate is preferably a so called ‘light’ soda ash or sodium carbonate product. Preferably the sodium carbonate has a poured bulk density of less than 1000 kg/m3, more preferably less than 900 kg/m3 and most preferably less than 800 kg/m3. The solid fragrance booster composition described herein comprises 10 to 49 wt.% water by weight of the composition, more preferably 15 to 45 wt.% water and most preferably 18 to 40 wt.% water by weight of the composition. This refers to the weight of water added to the compostion. The water may associate with the sodium carbonate to form hydrated sodium carbonate. Preferably the water is deionized. The ratio (by weight) of sodium carbonate to water is 1 : 1 to 3: 1. Preferably 1.3:1 to 2.8: 1 , more preferably 1.5:1 to 2.5:1 and most preferably 1.7:1 to 2.3:1. The solid fragrance booster composition may preferably further comprise additional inorganic salts. Inorganic salts are preferably selected from divalent (for example calcium or magnesium) and trivalent (for example Aluminium) metal salts of sulphate, chlorides, nitrides and the respective hydrates. Suitable examples may preferably be selected from: CaCh, CaSC>4, CaNOs, MgSC MgCh, MgNoa, Ah(SO4), AlCh, Ah(NO3) and their hydrates. The solid fragrance booster composition prefera