Delivery systems with low polymer content

Abstract

It relates to a microcapsule for consumer products, which comprises: a) a hydrophobic benefit agent, optionally, solubilized or dispersed in a suitable organic solvent, and b) a wall encapsulating the hydrophobic benefit agent; where: the wall is a polyurethane polymer which comprises: a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol which are specific tannins and / or lignins, the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC); the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography; the amount of biobased polyphenol in the polymeric wall is from 15 to 75% by weight; and the hydrophobic benefit agent / polymer weight ratio (F / P) is from 15 to 120. It also relates to its preparation processes, its use as delivering systems for delivering a hydrophobic benefit agent, as well as to a consumer product comprising them.

Description

Delivery systems with low polymer contentThis application claims the benefit of European Patent Application no. 24382601 filed on June 4, 2024Technical FieldThe present invention relates to a microcapsule with a wall composed of a biopolymer cross-linked with an isocyanate encapsulating one or more benefit agents. Particularly, the biopolymer is a polyphenolic compound. It also relates to processes for preparing polyphenol-based microcapsules, and consumer products containing the same.Background ArtThe development of microcapsules containing benefit agents such as fragrances for consumer products is an active research field. The need for such products stems from the market’s ever-increasing demand for fragrance long lastingness and for sustainable technologies along with regulatory evolutions. In particular, concerns regarding the presence of formaldehyde and the use of synthetic chemicals have prompted the development of new materials.The main type of polymer used for the manufacture of biobased microcapsules is usually found to belong to the so-called Pll chemistry standing for polyurea / polyurethane. These types of materials have been explored as the successors of aminoplast, phenoplast, and amidoplast based microcapsules.In such chemistries, isocyanates are combined with monomers, oligomers, prepolymers and even larger polymers which contain hydroxyl and amino moieties (amongst others) to obtain solid covalently crosslinked walls as in W02023006234A1.In some other examples, isocyanates are left to react with or in the presence of one or more modified or hydrolyzed macromolecules. For instance, denatured vegetable proteins are used (EP4124383A1) or oligomers coming from the controlled hydrolysis of tannic acid (EP4209265A1). Alternatively, fillers of varying origin (biodegradable wax as per WO2023 / 177360A1) and bio-based crosslinking agents (glyoxal W02020 / 209909A1) are used to harden and structure the capsule’s wall creating composite-like or multi- layered / patched walls.Some of the aforementioned examples of biobased capsules are also partially biodegradable according to OECD standards. Regardless of the wall’s biodegradation potential, a common trend is observed in the manufacturing recipe of the existing biobased microcapsules. Namely, an emulsion is stabilized with classical surfactants likepolyvinyl alcohol, polyvinyl pyrrolidone, modified starches, gums, naphthalene salt derivatives or combinations of the like and later left to polymerize.In such instances, the polymerization is most usually carried out via interfacial polymerization using the droplet’s interface as a template for the formation of a polymeric wall. This reaction forms a first polymer layer (insoluble both in the continuous and the dispersed phase of the original emulsion) on top of which several others can be added. For instance, a second layer created via coacervation is included in WO2023285609A2. Alternatively, second and even third layers can be added combining covalent and noncovalent interactions as in US20230313078.The obtention of such polymer networks entails complex manufacturing procedures and generally involve the presence of excess polymer material around or as part the wall which contributes to protecting the fragrance, imparting adequate mechanical properties, and increasing resistance to leakage. A large number of wall materials are popular for the production of polymeric biobased microcapsules. Examples of biobased wall materials that can be used in their manufacture are gum arabic, agar-agar, agarose, maltodextrins, alginic acid or salts thereof, e.g. sodium alginate or calcium alginate, fats, fatty acids, cetyl alcohol, collagen, chitosan, lecithin, gelatine, albumin, shellac, polysaccharides such as starch or dextran, polypeptides, protein hydrolysates, sucrose, and waxes.Conversely, the use of other biobased materials compatible with Pll chemistry, and particularly polyphenols like tannins or lignins, is not as popular. Even more particularly, the use of polyphenols as main co-monomers in the synthesis of fragrance microcapsules for consumer products is yet to be explored.It is well-known to those skilled in the art that polyphenols are challenging materials to work with. Polyphenols can interact mostly via non-covalent interactions with several polymers and nitrogen containing materials. In addition, polyphenols are highly hydrophilic, can self-crosslink, oxidize, and complex several metals. Such interactions are strongly dependent on the concentration of polyphenol in the system. Consequently, increasing amounts of polyphenol in the final formulation increase the number of potential negative interactions with other formulation aids or co-reagents. Particularly in the context of microencapsulation, such interactions prevent proper capsule formation.Tannins have been explored as potential ways of preparing 100% polyphenol-based micro and nano capsules (IT201700030574A1) for smart delivery materials. Unfortunately, resulting capsules lack required mechanical properties, possess high pH and salt sensitivity and require involved production methods difficult to scale-up as they rely on a sonochemical approach.Currently, the use of tannins in encapsulation using Pll chemistry and particularly at levels above 7 %w / w of the total polymer wall is still challenging. In a comparative example (paragraph

[0331] in US2023287308A1) it is cited that the content of condensed tannin (namely corigal lin) in PU-coacervate capsules is restricted to 2% according to the weight of the microcapsules.Despite what is known in the art, there is still the need to find microcapsules for delivering benefit agents with low polymeric content, and therefore, with a lower amount of microplastics, but exhibiting a good stability in the consumer product and ideally high biobased content. Current state of the art also teaches that it is challenging to introduce substantial amounts of polyphenols in the formulation of polymers intended for microencapsulation (especially using Pll chemistry) since all negative interactions between them and other typical ingredients are highly dose dependent.Summary of InventionThe present inventors have found that polyphenols, in particular lignins and tannins with certain preferred features, can be used as co-monomers and that significant amounts of them can be introduced for effectively forming benefit agent PU-based microcapsules via several types of polymerizations whilst bypassing formulation barriers.In particular, the strong interactions between such polyphenols and other ubiquitous surfactants and the insolubility of the polyphenols for instance in fragrance oils is resolved.Advantageously, the use of lignins or tannins as crosslinkers as well as surface active comonomers, allows encapsulation where the emulsion upon which the capsules are built can be stabilized solely with the polyphenolic comonomer, i.e. , without the need of any external emulsifying agents like polyvinyl alcohol. In some other instances, the polyphenol can be effectively introduced in the organic phase instead of the aqueous phase allowing an in-situ reaction. In such instances, a minimum amount of an external emulsifier like polyvinyl alcohol is still required to stabilize the emulsion but the interactions between the biobased polyphenol and the external emulsifier are avoided.The microcapsules of the present invention are, therefore, made of a polyurethane polymer which is obtained from the reaction of terminal and intermediate phenolic groups or aliphatic hydroxyl groups within lignin / tannins and isocyanate groups present in polyfunctional isocyanates and may encapsulate one or more hydrophobic benefit agents.In addition, they have a remarkably low polymer content. This is seen by the values of hydrophobic benefit agent / polymer weight ratio (F / P) of the microcapsules of the present invention. Increasing F / P ratios correspond to decreasing polymer content in the microcapsules.Besides, the microcapsules prepared using the processes of the present invention perform better than their surfactant-containing comparative examples both analytically and sensorially, also providing microcapsules that exhibit prolonged slow release of active ingredients as well as adequate stability in the consumer product.Accordingly, a first aspect of the present invention relates to a microcapsule for consumer products, which comprises: a) a hydrophobic benefit agent, optionally, solubilized, or dispersed in a suitable organic solvent, and b) a wall encapsulating the hydrophobic benefit agent; wherein: the wall is a polyurethane polymeric wall which comprises: a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol; where the polyfunctional isocyanate has at least two isocyanate functional groups; the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); the amount of biobased polyphenol in the polymeric wall is from 15 to 75% by weight based on elemental analysis of the polymer wall; and the hydrophobic benefit agent / polymer weight ratio (F / P) is from 15 to 120, with the proviso that when the polymer comprises a moiety from a lignin, then the hydrophobic benefit agent / polymer ratio (F / P) is from 30 to 120.The amount of biobased polyphenol in the polymeric wall is calculated based on elemental analysis of the polymeric wall. Example 11 illustrates how to calculate it. The amount of biobased polyphenol in the polymer wall can be also expressed as being calculated from the raw material weights used in the synthesis assuming the ingredients react to 100%. The elemental analysis confirmed that the calculation from raw materials is accurate.For the purposes of the present invention, the F / P ratio is calculated for a given formulation as the mass of the hydrophobic benefit agent (mba) over the mass of polymer that encapsulates it (mpoi). In turn, the mass of resulting polymer is determined adding the active content of commercial monomers (mmon) , assuming complete conversion and deducting (if applicable) the amount of any by product (mbp, e.g. condensation by-product like water, methanol, carbon dioxide, hydrochloric acid and the like). Thus: F _ m-ba _mba P mpoim mon n-bpF / P can be verified experimentally by a myriad of techniques including but notlimited to performing an extraction of the hydrophobic benefit agent with a solvent (e.g. ethyl alcohol), later carrying out a filtration under vacuum and carrying out one or several washes with water to remove surfactants, colloidal protectors, stabilizers, and any otherformulation adjuvants. Finally, after centrifuging, recovering the sediment and subsequently vacuum drying it, the insoluble polymer that enclosed the hydrophobic benefit agent is recovered and weighed (mrec). This quantity, along the amount of hydrophobic benefit agent initially encapsulated after experimental verification (m^p, for instance obtained via the encapsulation efficiency determination method described inExample 7) can be used to calculate the experimental fragrance-to-polymer ratio I - I expAs such:Another aspect of the present invention relates to processes for the preparation of the microcapsules of the present invention.Thus, the microcapsules of the present invention may be prepared by a process which comprises: a1) providing an organic phase comprising a hydrophobic benefit agent to be encapsulated in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanate functional groups, on a polyfunctional isocyanate-to-oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10; wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to-aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired size are obtained; a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature, and wherein warm means a temperature from 35 to 65 °C and room temperature means a temperature between 20 to 25°C.The microcapsules of the present invention may also be prepared by a process which comprises b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in an benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to-solution weight ratio of from 0.15 to 4.5;wherein the polyfunctional isocyanate has at least two isocyanates functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); b2) providing an aqueous solution of emulsifier in a concentration of from 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to- aqueous weight ratio from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsules to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature, wherein warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°CTannins are a broad class of complex organic compounds found in many plants, and their structures can vary significantly. Thus, the general approach to calculating the weight average molecular weight is by GPC. The GPC is conducted^at 70°C using DMSO containing 0.1 % of LiCI as a solvent for the tannin. 3 columns in series Agilent PLgel 5um of 10000 A, 1000 A and 500 A were used. The sample solution is filtered through a 0.45 pm to remove any particulate. The flow rate is 0.25 ml / min and the injection volume 20 pl, (see F. Melone et al.; “Tannin Structural Elucidation and Quantitative31P NMR Analysis. 2. Hydrolyzable Tannins and Proanthocyanidins”, Journal of Agricultural and Food Chemistry, 2013, vol. 61 , pp. 9316-9324). Size exclusion technique may also be used as in the case of lignins. Size exclusion chromatography (SEC) measurements may be conducted using THF at 40°C (1 ml / min) and a polystyrene standard kit with MW ranging from 162 to 278700 g / mol.Another aspect of the present invention relates to the use of the microcapsule as defined above as a delivery system for delivering a hydrophobic benefit agent.Another aspect of the present invention relates to a microcapsule slurry comprising a plurality of the microcapsules as defined above dispersed in an aqueous phase.Another aspect of the present invention relates to a composition comprising either the microcapsules as defined above or the microcapsule slurries as defined above, together with appropriate excipients and / or carriers.Finally, another aspect of the present invention relates to a consumer product for controlled release of the hydrophobic benefit agent comprising either the microcapsules as defined above, or the slurry as defined above, or the composition as defined above.Detailed description of the inventionAll terms as used herein in this application, unless otherwise stated, shall be understood in their ordinary meaning as known in the art. Other more specific definitions for certain terms as used in the present application are as set forth below and are intended to apply throughout the description and claims.The term "about" or “around” or “approximately” as used herein refers to a range of values ± 10% of a specified value. For example, the expression "about 10" or “around 10” includes ± 10% of 10, i.e., from 9 to 11.As used herein, the term “optional” means that the element or step to which this term refers, may or may not be present.Where in the present invention a numerical interval is used, this includes the values of the extremes of the interval. In particular, as used herein, the term “comprised between” refers to a range of values including the end points of the range.Numeric examples given in the form “x to y” include the values given. When multiple preferred numeric ranges are specified in this format, all ranges created by combining the various endpoints are also included.The word “comprise” for the purposes of the present invention encompasses the case of “consisting of”.Unless otherwise stated, all percentages mentioned herein are expressed in weight with respect to the total weight of the product / mixture to which the percentage refers, provided that the sum of the amounts of the components in the mixture are equal to 100%. For the sake of completeness quotes like “an x% aqueous solution of compound y” refer to a percentage in which x grams of compound y are mixed with 100-x grams of water to form 100 grams of the solution. Alternatively, the percentages found in the tables within the examples (column regarding percentage formulation) refer to the grams of each entry with respect to the total slurry. In both cases the individual percentages add up to 100%.The terms “at least one” or “one or more” as used herein refers to 1 or more, for example 2, 3, 4, 5, 6, 7, 8, 9 or more.The term “a compound” may encompass one or more compounds, for instance, a hydrophobic benefit agent in the context of the present invention means one or morebenefit agents, a tannin means one or more tannins, and a lignin means one or more lignins.The term “and / or” expresses that a linkage exists, or an alternative is provided.By “room temperature” is understood a temperature in the range from 20 to 25 °C.By “warm” is understood a temperature in the range from 35 to 70 °C. Particularly, warm is understood as 55°C.Encapsulation is a process to entrap one substance (benefit agent) within another substance (wall material). The encapsulated substance can be called the core material, fill, active, internal or payload phase, while the substance that is encapsulating is often called the coating, membrane, shell, wall, capsule, carrier material, external phase, or matrix.The "core material" is composed of any hydrophobic benefit agents submitted to microencapsulation. Such benefit agents are active ingredients that are insoluble or poorly soluble in water, but readily soluble in fats, oils, and suitable organic solvents.The term “hydrophobic benefit agent” refers to a compound or composition that exhibits hydrophobic characteristics, meaning it has a tendency to repel or fail to mix with water.The terms “benefit agent”, “active ingredient”, and “active material” have been used interchangeably herein.For the purposes of the present invention, the hydrophobic nature of the agent is defined by the Log Ptwhich refers to the decimal logarithm of the partition coefficient Pt, which is the ratio of the equilibrium concentrations of a compound (i) in a mixture of two immiscible solvents for a given temperature. Typically, octanol (a non-polar solvent, C°ct) and water (a polar solvent, Qwat) at pH=7, are selected as solvents at 23°C (see OECD 107 guidelines). In the context of the present invention, the ClogP values of the preservation agent are calculated by using the ClogP calculation method implemented in ChemDraw versions 19. ChemDraw is part of the ChemOffice platform, commercialized by Perkin Elmer.Mathematically, it can be expressed as:For the purpose of the invention, the logarithm of the partition coefficient for a mixture of N materials log Pmcan be approximated with the following equation where wtrepresents the weight fraction of material i within the mixture:logA benefit agent is considered hydrophobic when the log Pmis greater than 2.5.The "wall" is the structure formed by the microencapsulating polymer around the benefit agent core material being microencapsulated. In general, the wall of the microcapsule is made of a polymeric phase with an inner surface and outer surface. The inner surface is in contact with the microcapsule core material. The outer surface is in contact with the environment in which the microcapsule resides, e.g., a water phase, fabric, skin, or hair. Ideally, the wall protects the core against deterioration by oxygen, moisture, light, and effect of other compounds or other factors; limits the losses of volatile core materials; and releases the core material under desired conditions. In this respect, the microcapsules of this invention provide controlled release of the active material.As used herein, a " microcapsule" or more generically a "capsule," is a structure having a core material and a well-defined shell or wall. The shell can coat a liquid core as a single reservoir (thin shell around a large droplet of the benefit agent also called a core-shell arrangement). Alternatively, the capsule consists of a solid polymer matrix in which several small droplets of the benefit agent are engulfed, matrix type arrangement). In the above description, the terms large or smaller refers to the outer capsule diameter.Depending on the size of capsules, microcapsules are generally classified as microcapsules when having a size of from 1 to 1000 pm quoted as the median volumebased diameter Dv

[0050] measured using dynamic light scattering, for example using a Malvern Master sizer 3000 (Dynamic Light Scattering, DLS). Particle size is calculated from DLS measurements using a suitable population model. Generally, for the purposes of the present invention microcapsules refer to capsules having a size of from 1 to 100 pm, preferably 1-60 pm, and even more preferably, 1-40 pm. As used herein by “microcapsule slurry” is meant microcapsules that are dispersed in a liquid.A "cross-linking agent" or "cross-linker" refers to a substance that induces or forms a cross-link (either covalent, ionic, or non-covalent) via its reaction with one or more reactive sites. A cross- linking agent of use in this invention may be multifunctional, i.e. , containing more than two reactive groups versus a given moiety.The term "curing" as used in polymer chemistry refers to a toughening or hardening process of a polymer by cross-linking of polymer chains, brought about by heat, chemical additives, some source of radiation or a combination of such stimuli.The term “stability” or “in base stability” refers to the ability of a given microcapsule towithstand the extractive power of the medium where it is dispersed. If a capsule has low stability, it cannot retain its benefit agent (e.g. a fragrance), as intended, for the benefit agent will be lost into the base. Laundry care bases like softeners of laundry detergents are surfactant rich media designed, amongst other purposes, to solubilize organic compounds such as fragrances. These materials induce the so called “leakage”.A capsule with “high (in base) stability” can be regarded as “stable” which is a synonym of possessing “high benefit agent retention” or “leakage resistant”.In the present invention the term stability does not refer to other possible definitions found in the art. Meaning aspects like hydrolytic stability of suspension stability.As used herein, “controlled release” refers to retention of the benefit agent in the microcapsule until a specified triggering condition occurs. Such triggers include, e.g., friction or rubbing, swelling, a pH change, an enzyme, a change in temperature, a change in ionic strength, or a combination thereof.The term “biobased polyphenols” or “polyphenols” refer to naturally occurring phenols naturally sourced unmodified or to naturally occurring phenols that have been modified through chemical and / or enzymatic derivatizations such as sulfonation, alkylation, dealkylation, epoxidation, amination, oxidation, reduction, hydrolysis, conversion into a Mannich base, conversion into a phenalkamine, participation in Maillard reactions or further polymerized, amongst other. Biobased polyphenols according to the invention include lignins and tannins and modified lignins and modified tannins and mixtures thereof.The term “oligomer” is defined as per the IIIPAC (Gold book, 3rdedition 2019 online version 3.0.1) and refers to a molecule of intermediate relative molecular mass (Mw< 10 kDa), the structure of which comprises a small plurality of units derived, actually or conceptually, from molecules of lower relative molecular mass. A molecule is regarded as having an intermediate relative molar mass if it has properties which do vary significantly with the removal of one or a few of the units. As an example, a property that would significantly change up to a given number of units is the equivalent weight of a given functional moiety. For the present invention a significant (>10%) variation in equivalent weight is only achieved if the molecular weight average molecular weight of the oligomer is below 10000 kDa. Above this threshold of 10000 kDa, the equivalent weight becomes essentially constant. Below such a threshold (i.e. reducing the degree of polymerization and consequently the number of repetitive units) significantly impacts the equivalent weight of the molecule.As an example, polyphenols and particularly hydrolysable tannins, have a maximumattainable equivalent weight spanning between 10 and 20 meq OH / g of tannin.The term “dry content” found in the examples refers to the percentage of material that is not volatilized after exposure at 105°C according to ISO 1625:1998 “Plastics — Polymer dispersions — Determination of non-volatile matter (residue) at specified temperatures. The term dry content” can be used interchangeably within the present invention as “nonvolatile content” or percentual solids content. Thus, a material with a dry content of 100% is either non-volatile during the conditions of the test or the product containing it is adequate to withstand the temperature increase and protect the material from evaporation and loss.The term neat oil equivalent (shortened as NOE and expressed in % as g of total fragrance / g of application) is defined as a fragrance accord that is free from extraneous matter. As such, NOE represents an alternative way of representing the total oil concentration in a sample independently of its original formal (encapsulated, free + encapsulated, etc). For the case in which only capsules are added to a base, its NOE can be calculated as:NOE = wc- xFwere wcand xFrespectively represent the dosage of capsules and the fragrance load within the capsule.The term “NCO / OH ratio” refers to the relative proportions in equivalents (i.e. , mols of chemical moieties) and particularly to the ratio between the moles of isocyanate groups over the moles of hydroxyl groups. An NCO / OH ratio of unity represents the case in which perfect stoichiometry between both OH and NCO groups is theoretically met. Similarly, NCO / OH ratios above or below unity would generate different polymer structures in which either an excess of NCO or OH groups would be found. People skilled in the art can refer to existing knowledge in this matter. As such, the synthesis of polymers for microencapsulation purposes would not be different from the formulation of polymers intended for other applications such as coatings or adhesives.As mentioned above, the microcapsule for consumer products, which comprises: a) a hydrophobic benefit agent, optionally, solubilized or dispersed in a suitable organic solvent, and b) a wall encapsulating the hydrophobic benefit agent; wherein: the wall is a polyurethane polymeric wall which comprises: a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol; where the polyfunctional isocyanate has at least two isocyanate functional groups; the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof, the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatographyusing THF at 40°C (1ml / min) and a polystyrene standard kit with MW ranging from 162 to 278700 g / mol, the amount of biobased polyphenol in the polymeric wall is from 15 to 75% by weight determined from elemental analysis of the wall and the hydrophobic benefit agent / polymer weight ratio (F / P) is from 15 to 120, are part of the invention, with the proviso that when the polymer comprises a moiety from a lignin, then the hydrophobic benefit agent / polymer ratio (F / P) is from 30 to 120.Advantageously they have a high percentage of polyphenols in the polymeric wall and a low polymer content in the polymeric wall.The polyurethane polymeric wall which comprises a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol is the result of the polyaddition reaction of the corresponding biobased polyphenol and polyfunctional isocyanate.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules for consumer products according to the invention, are those where the wall does not contain any other biobased polymer besides the biobased polyphenol.In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the invention are those where the wall contains a maximum of 20% by weight of other biobased polymers and or oligomers (e.g. proteins or saccharides) quantified via elemental analysis, particularly, a maximum of 10% by weight, more particularly, a maximum of 8% by weight, even more particularly a maximum of 5% by weight.In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the invention are those where the wall contains a maximum of 20% by weight of other chitosan, particularly, a maximum of 10% by weight, more particularly, a maximum of 8% by weight, even more particularly a maximum of 5% by weight.In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the invention are those where the wall contains a maximum of 20% by weight of other saccharides, particularly, a maximum of 10% by weight, more particularly, a maximum of 8% by weight, even more particularly a maximum of 5% by weightThe amount of biobased polymer other than biobased polyphenol in the polymer wall, or of chitosan or of saccharides can be also calculated from the raw material weights used in the synthesis assuming the ingredients react to 100%.In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules for consumer products according to the invention are those where the wall is a polyurethane polymeric wall which consists of a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol; the polyfunctional isocyanate has at least two isocyanate functional groups.Poly-isocyanates, in particular aromatic polyisocyanates, are highly reactive compounds. The polyaddition reactions of polyisocyanates with diols or polyols form the basis of polymer chemistry for formulating polyurethanes.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the present invention are those which are free of any other substance acting as emulsifying agent. In another particular embodiment, the microcapsules of the present invention are those where the biobased polyphenols act as surface-active monomers.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the present invention are those where the wall is a polyurethane polymeric wall which comprises either a) the polyfunctional isocyanate and the polyphenol as comonomers or b) the polyfunctional isocyanate and the polyphenol as comonomers but other polymers, particularly emulsifiers, colloidal protectors or impurities are entangled in the wall.In another particular embodiment, in combination with any of the embodiments above or below, microcapsules of the present invention are those where the amount of biobased polyphenol in the polymeric wall is from 15% to 75% by weight. In another particular embodiment, the microcapsules of the present invention are those where the amount of biobased polyphenol in the polymeric wall is from 16% to 70% by weight. In another particular embodiment, the microcapsules of the present invention are those where the amount of biobased polyphenol in the polymeric wall is from 16% to 60% by weight.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the present invention are those where both crosslinkers are oligomeric species. In another particular embodiment, the microcapsules of the present invention are those where the polyurethane polymeric wall made of oligomers have a weight average molecular weight equal to or lower than 10 kDa.As mentioned above, in the context of the present invention when referring to “a tannin, a lignin, and a mixture thereof”; a tannin may encompass one or more tannins, a lignin may encompass one or more lignins, a mixture of both may encompass one or more tannins and one or more lignins.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the present invention are those where the polyphenol is a tannin.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the invention are those where the tannin has a weight average molecular weight from 330 to 4000 g / mol. In another particular embodiment, the microcapsules according to the invention are those where the tannin has a weight average molecular weight of approximately between 400 to 3200 g / mol. In another particular embodiment, the microcapsules according to the invention are those where the tannin has a weight average molecular weight of approximately between 500 to 2500 g / mol. In another particular embodiment, the tannin has a weight molecular weight between 800 to 1500 g / mol.Tannins can be classified based on the differences in chemical structures and are usually classified into three categories: hydrolysable tannins (which include gallotannins and ellagitannins) condensed tannins (flavonoids also known as proanthocyanidins) and complex tannins (which include hybrids between condensed and hydrolysable tannins along with special types like phlorotannins).In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the present invention are those where the tannin is a hydrolysable tannin. Hydrolysable tannins are gallic acid derivatives classified by the product derived from their hydrolysis. Hydrolysable tannins are hydrolyzed by weak acids or weak bases to produce carbohydrate and phenolic acids. At the center of a hydrolysable tannin molecule, there is a carbohydrate (usually D-glucose but also cyclitols like quinic or shikimic acids). The hydroxyl groups of the carbohydrate are partially or totally esterified with phenolic groups such as gallic acid in gallotannins or ellagic acid- related structures in ellagitannins.Hydrolysable tannins are mixtures of polygala glucoses and / or poly-galloyl cyclitols derivatives usually containing between 1 up to 20 gallic acid residues per molecule.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the present invention are those where the tannin is selected from the group consisting of tannic acid, a gallotannin, an ellagitannin, and a mixture thereof. These tannins are hydrolysable tannins. Examples of gallotannins are the gallic acid esters of glucose in tannic acid (typically decagalloyl glucose with formula C76H52O46), found in the leaves and bark of many plant species. In another particular embodiment, the hydrolysable tannin is a hydrolysable gallotannin, with a sugar core of either glucose or quinic acid and with molecular weights between 330 and 4000 g / mol.Hydrolysable tannins can be extracted from different vegetable plants, such as chestnut wood (Castanea sativa), oak wood (Quercus robur, Quercus petraea and Quercus alba), myrobalan (Caesalpinia spinosa), gallnuts (Quercus infectoria and Rhus semialata).In a particular embodiment of the invention, the tannin is a modified tannin. The tannin may be modified through chemical and / or enzymatic derivatizations such as sulfonation, alkylation, de-alkylation, epoxidation, amination, oxidation, reduction, hydrolysis, conversion into a Mannich base, conversion into a phenalkamine, participation in Maillard reactions or further polymerized, among others.Lignins are a family of complex chemical compounds commonly derived from wood and that pose an integral part of the cell walls of plants. Lignins can be large, cross- linked, racemic, with a molecular mass generally in excess of 10,000 g / mol and are relatively hydrophobic and aromatic in nature. Despite this, lignins can be fractioned and lower molecular weight fractions can be further upcycled.Lignins may be defined as an amorphous, polyphenolic material arising from enzymatic dehydrogenative polymerization of three phenylpropanoid monomers, namely, coniferyl alcohol, sinapyl alcohol, and p-coumaryl alcohol. The traditionally held biosynthesis process, which consists essentially of random radical coupling reactions, sometimes followed by the addition of water, primary, secondary, and phenolic hydroxyl groups to quinone methide intermediates, leads to the formation of a three-dimensional polymer which lacks the regular and ordered repeating units found in other biobased polymers such as polysaccharides and proteins.Suitable lignin-related materials of use in this invention can include, but are not limited to, lignin in its native or natural state, i.e. , non-modified or unaltered lignin, lignosulfonates, or any combination or mixture thereof. Suitable lignosulfonates can include, but are not limited to, ammonium lignosulfonate, sodium lignosulfonate, calcium lignosulfonate, magnesium lignosulfonate, or any combination or mixture thereof.In a particular embodiment of the invention, the lignin is a modified lignin. The lignin may be modified through chemical and / or enzymatic derivatizations such as sulfonation, alkylation, de-alkylation, epoxidation, amination, oxidation, reduction, hydrolysis, conversion into a Mannich base, conversion into a phenalkamine, participation in Maillard reactions or further polymerized, among others.These modifications to the lignin can be tailored to alter its structure and functionality in a controlled manner. Thus, for instance, when the modification is a sulfonation, the process involves introducing sulfonic acid groups into the lignin structure. The sulfonated lignin becomes more hydrophilic and water-soluble. When the modification is an alkylation, theprocess involves adding alkyl groups to the lignin molecule, which can increase the lignin's solubility in nonpolar solvents. When the modification is a de-alkylation, this process removes alkyl groups from lignin. This could be used to fine-tune the solubility and binding characteristics of lignin in product formulations. When the modification is an epoxidation, the introduction of epoxy groups to lignin molecules can make the lignin more reactive, to improve the formation of cross-linked polymers. When the modification is an amination, it adds amine groups to lignin. When the modification is an oxidation or reduction, these modifications can be used to alter the electronic characteristics of lignin. When the modification is a hydrolysis, it breaks down the lignin into smaller phenolic compounds. When the modification is the conversion into a Mannich base, this modification involves reacting lignin with formaldehyde and amine to produce Mannich bases. When the modification is the conversion into phenalkamine, this modification involves reacting lignin-derived phenols with amines to create phenalkamines. The modification may involve participation in Maillard reactions. Finally, the modification may be a further polymerization where the Lignin is polymerized to form larger, more complex molecules.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the invention are those where the lignin has a weight average molecular weight from 1000 to 10000 g / mol. In a particular embodiment, the microcapsules according to the invention are those where the lignin has a weight average molecular weight from 1000 to 9000 g / mol. In another particular embodiment, the lignin has a weight average molecular weight from 1000 to 8000 g / mol. In another particular embodiment, the lignin has a weight average molecular weight from 2000 to 7000 g / mol. In another particular embodiment, the lignin has a weight average molecular weight from 3000 to 7000 g / mol.According to the invention, the microcapsules according to the invention are those where the wall comprises a moiety derived from at least difunctional polyisocyanates, i.e. , any aliphatic, alicyclic or aromatic isocyanates are suitable, provided they have at least two reactive isocyanate groups.In another particular embodiment, the polyisocyanate contains on average 2 to 5 functional — N=C=O groups. In another particular embodiment, the polyisocyanate is a diisocyanate. The diisocyanate may have the general structure O=C=N — R — N=C=O, wherein R represents aliphatic, alicyclic, or aromatic radicals. In another particular embodiment, these R radicals have five or more carbon atoms.The polyisocyanate for the purposes of the present invention may be an aliphatic, cycloaliphatic, hydroaromatic, aromatic or heterocyclic poly isocyanates, their substitutionproducts including blocked products and mixtures of the aforementioned monomeric or oligomeric compounds. In addition, the poly isocyanates according to the invention can be linear or branched.In another particular embodiment according to the invention, the microcapsules of the present invention are those where the polyfunctional isocyanate is an aromatic polyisocyanate.The term “aromatic polyisocyanate” refers to any polyisocyanate compound in which two or more isocyanate groups are directly attached to aromatic C-atoms. In a particular embodiment, the microcapsule of the present invention is that where the polyfunctional isocyanate group is phenyl, tolyl, xylyl, naphthyl or diphenyl moiety as an aromatic component, as well as derivatives of such polyisocyanate compounds. Thus, specific examples of aromatic polyisocyanates include diphenylmethane diisocyanate, toluene diisocyanate, polyethylene polyphenol isocyanate, xylylene diisocyanate (XDI), tetramethyl xylylene diisocyanate, 1 ,5-naphthylene diisocyanate, 4,4’-diphenylmethane diisocyanate (MDI) , hydrogenated MDI (H12MDI), tetramethyl xylol diisocyanate (TMXDI) , 4,4 ' -diphenyldimethylmethane diisocyanate, di- and tetraalkyldiphenylmethane diisocyanate, 4,4 ' -dibenzyl diisocyanate, 1,3-phenylene diisocyanate, 1 , 4-phenylene diisocyanate, the isomers of tolylene diisocyanate (TDI), 4,4 '- diisocyanatophenylperfluoroethane, phthalic acid bisisocyanate ethyl ester, also polyisocyanates with reactive halogen atoms, such as 1 -chloromethylphenyl 2,4- diisocyanate, 1-bromomethyl-phenyl 2,6-diisocyanate, and 3, 3-bischloromethyl ether 4,4'- diphenyldiisocyanate, and combinations thereof. In a particular embodiment, the microcapsules of the present invention are those where the polyfunctional isocyanate group is xylylene di-isocyanate.The linear, branched or cyclic aliphatic or aromatic polyisocyanate may be present as a monomer, oligomer, polymer and mixtures respectively. A monomeric polyisocyanate is a molecule that is not attached to another molecule, in particular, not via one or more crosslinking agents. A polymeric polyisocyanate comprises at least two monomers linked by one or more crosslinking agents or linking units. The at least two monomers need not necessarily be the same monomers but may be different. A polymeric polyisocyanate preferably comprises at least 2 or more monomers, i.e. , at least 2, 3, 4, 5, 10, 20, 30, 40, 50, 100 or more monomers attached to each other via at least one crosslinking agent.The linear, branched, or cyclic aliphatic or aromatic polyisocyanate preferably has a limited size / a limited molecular weight, which allows reactivity with the one or more crosslinking agents. In a particular embodiment the weight average molecular weights of the polyisocyanate are in a range of from 100 to 5000 g / mol.In another particular embodiment of the present invention, the polyisocyanate is an aliphatic polyisocyanate.The term “aliphatic polyisocyanate” refers to any polyisocyanate molecule that is not aromatic. In addition, the molecule comprises at least two isocyanate groups, i.e. , at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 , 12, 13, 14, 15, 20, 50, 100, 200 or more isocyanate groups directly attached to a corresponding number of different C atoms of the same aliphatic molecule, and derivatives of such compounds.The aliphatic polyisocyanate molecule containing at least two isocyanate groups may further be linear, branched or cyclic and may have any substitutions including, for example, aliphatic substituents, aromatic substituents, one or more heteroatoms such as nitrogen, oxygen, phosphorus and / or sulphur, halogens and / or other functional groups such as alkoxy groups.In a particular embodiment, the linear or the branched aliphatic polyisocyanate molecules can be C2-C2o-linear alkyl, preferably Cs-Cis-linear alkyl, C4-Ci2-linear alkyl, Cs-C -linear alkyl, Ce-Cg-linear alkyl, CyCs-linear alkyl C2-C2o-branched alkyl, Cs-Cis-branched alkyl, C4- Ci2-branched alkyl, Cs-C -branched alkyl, Ce-Cg-branched alkyl, C7- Cs-branched alkyl. In another particular embodiment, the linear or branched aliphatic molecules do not comprise an aromatic structure.The cyclic aliphatic polyisocyanate molecule comprises at least 1 , i.e., 1 , 2, 3, 4 or more non-aromatic ring structures, wherein the ring structure itself preferably consists only of C- atoms. Of course, the C-atoms of the ring structure may bear suitable substituents. The at least 1 -ring structures preferably consist independently of 3-, 4-, 5-, 6-, 7- or 8-membered rings. Preferably, the cyclic aliphatic molecule comprises 2 to 20 C-atoms, such as 3 to 15. Examples of aliphatic polyisocyanates include tetramethylene diisocyanate, Penta methylene diisocyanate, hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate, or isophorone diisocyanate. These polyisocyanates may be derivatives thereof, such as dimers, trimers, biurets, allophanates, carbodiimides, uretdiones, oxadiazinetriones, and modified polyisocyanates and polyol-modified polyisocyanates obtained by pre-reacting polyols such as trimethylol propane (TMP). These may be used alone or in combination of two or more.In particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the present invention are those where the moieties derived from a polyfunctional isocyanate are moieties derived from an aromatic polyisocyanate, a modified polyisocyanate, a blocked isocyanate or a mixture thereof. In another particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the present invention are those where the moieties derived from apolyfunctional isocyanate are moieties derived from xylene di-isocyanate- trimethylolpropane adducts.The core material of the biobased microcapsule of this invention is in liquid form and includes at least a hydrophobic benefit agent. In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules of the invention are those where the hydrophobic benefit agent is a chemical active material. In certain embodiments, the microcapsule includes at least two, three, four or more active materials in the core. The core material may also comprise a solvent. The solvent / benefit agent mixture is water immiscible.The organic solvent for preparing the oil phase is not particularly limited as long as it is a solvent capable of dissolving or dispersing the biobased polyphenol, the benefit agent and the polyisocyanate. Appropriate solvents may be solvents that are immiscible in water (i.e., solvents that cannot mix with water to form a homogeneous solution).For example hydrophobic solvents having water solubility of less than 10g / 100 ml measured at 20°C , like hydrocarbon solvents such as hexane, heptane, toluene, for example the Isopar® family available from Exxonmobil Chemical Co., or aromatic hydrocarbons having about 12-18 carbon atoms such as alkylated biphenyls and naphthalenes; esters such as benzyl benzoate (BB) and ethyl acetate, dialkyl adipates, citrate esters like triethyl citrate (TEC) and phthalates like diethyl phthalate (DEP) or dioctyl phthalate (DOP) or long chain alkyl esters e.g., methyl laurate, isopropyl myristate (I PM), diester such as sebacate esters or glycerine based esters such as triglycerides from various vegetable sources such as soya bean oil or palm oil; chlorinated solvents such as chloroform and dichloromethane: or ethers such as diethyl ether.The solvent may also be a water-soluble solvent having a water solubility higher than 10g / 100ml, measured at 20°C provided they are only present in an amount equal to or below 7.5% by weight of the oil phase, and in particular of the capsule’s core composition. Examples such as C3-C10 glycols e.g. 1,3 and 1 ,2 propylene glycols, dipropylene glycol (DPG) butylene glycols and hexylene glycols and their ethers and esters as available in the Dowanol range of solvent available from Dow Chemicals Inc., acetals e.g. propylene carbonate and other dioxolane derivatives, or glycerin-based acetals such as the Augeo range of solvents from Solvay, ketones e.g. propanone are also suitable.In a particular embodiment, the benefit agent is a perfume. Thus, in this particular embodiment, the perfume composition may include one or more perfumery acceptable solvents. Solvents are conventionally used in the fragrance industry to dilute olfactively powerful ingredients and to facilitate the handling of solid ingredients by dissolving them and handling them as liquids, as a diluent to reduce overall fragrance cost per unit weightor as a way to improve dispersability, emulsification or base compatibility. Specific solvents can be added to the whole fragrance at once or to fractions composed of smaller groups of ingredients which are later combined to compose a complete fragrance. Typically, suitable solvents are water-immiscible and are selected from those mentioned above for the benefit agent.The hydrophobic benefit agent can be a wide variety of active materials. Examples of active materials for the purposes of the present invention include perfume raw materials. In another particular embodiment, the microcapsule of the invention are those where the hydrophobic benefit agent comprises a fragrance, flavor, agricultural active, pesticide, insecticide, herbicide, fungicide, pharmaceutical active, nutraceutical active, animal nutrition active, food active, microbe-active, malodor counteractant, cosmetic active, UV protection agent, fabric softener active, hard surface cleaning active, skin or hair conditioning agent, flame retardant, dyestuff, and antistatic agent; chelating, disinfecting agent, or natural active. In another particular embodiment, the hydrophobic benefit agent is a perfume raw material, and it refers to a compound that provide a desirable smell, in particular, it may refer to a mixture of fragrance raw materials, in particular, perfume raw materials which are olfactively active compounds and, if desired, it may include auxiliary substances, such as additives. Examples of fragrance raw materials known in the art are essential oils, botanical extracts, perfumery bases, perfumery solvents or synthetic fragrance materials.The term “food active” refers to a hydrophobic substance that is legally permitted or generally recognised as safe (GRAS) for direct or indirect addition to foods for the purpose of imparting flavour, aroma, colour, nutritional benefit, or functional preservation. Typical examples include fat-soluble vitamins (A, D, E, K), carotenoids, tocopherols, and other oil-soluble antioxidants. The term specifically excludes compounds whose sole intended use is pharmaceutical, cosmetic or pesticidal rather than alimentary.The term “microbial active” refers to a hydrophobic agent whose primary intended technical effect in the delivered composition is the inhibition, reduction or elimination of bacteria, fungi, moulds, yeasts, viruses or protozoa. The expression embraces both broad-spectrum biocides and selective antimicrobials, whether naturally derived or synthetic, and encompasses substances such as thymol, eugenol, tea-tree oil, benzalkonium chloride, chlorhexidine, triclosan, zinc pyrithione, isothiazolinones and related hydrophobic quaternary ammonium compounds.The term “natural active” refers to an active material that is obtained from plant, animal or mineral sources by physical processes (pressing, distillation, extraction, filtration, fermentation, etc.) and has not been chemically modified other than by reactionscustomarily considered as minimal processing (e.g., hydrolysis, esterification to improve stability or odour). Illustrative members of this class include cold-pressed seed oils, phytosterols, squalene, cocoa butter, lanolin, and naturally fermented terpenoids.Examples of perfume raw materials are alcohols, ketones, aldehydes, esters, ethers, nitriles, and alkenes. Thus, in another particular embodiment, in combination with any of the embodiments above or below, the hydrophobic benefit agent is a perfume, which can be a single perfuming raw material or a mixture of several perfumery raw materials.In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules according to the invention are those where the hydrophobic benefit agent / polymer weight ratio (F / P) is from 20 to 110. In another particular embodiment, the microcapsules according to the invention are those where the hydrophobic benefit agent / polymer weight ratio is from 25 to 105. In another particular embodiment, the microcapsules according to the invention are those where the hydrophobic benefit agent / polymer weight ratio is from 30 to 100. In another particular embodiment, the microcapsules according to the invention are those where the hydrophobic benefit agent / polymer weight ratio is from 35 to 95. In another particular embodiment, the microcapsules according to the invention are those where the agent / polymer weight ratio is from 40 to 90.Other ingredients that can be added to the microcapsules once the wall formation has finished are stabilizers. Suitable stabilizers include, for example, quenchers, radical scavengers, ultraviolet absorbers, antioxidants, preservatives and / or rheology modifiers. Two or more kinds of these stabilizers may be mixed at any weight ratio. The weight ratio of the stabilizer is generally in the range of 0 to 1% by mass, particularly preferably in the range of 0.1 to 0.5% by mass, relative to 100% by mass of the slurry.In a particular embodiment, the microcapsules according to the invention have a morphology that is a core-shell type.The combinations of the different embodiments defined above or below are also embodiments of the present invention.Several types of polymerizations for the effective formation of active material microcapsules by polyurethane chemistry can be used to prepare the microcapsules of the present inventions. The methods of the invention allow introducing significant amounts of biobased polyphenols, in amounts at least of 15%, 20% 25%, 30%, 40%, 50%, 60%, 70%, or 75%, in weight with respect to the polymeric wall, in particular, of high purity hydrolysable tannins, whilst by-passing formulation barriers.In addition, by using the processes of the present invention, a high encapsulationefficiency is achieved. "Encapsulation efficiency" or "microencapsulation efficiency" or "EE" represents the proportion of the core active material that is not available to an extracting solvent under specified test conditions. In accordance with the processes of the present invention, microencapsulation efficiencies in the range of 80% to 99.9% are attainable, or more preferably 90% to 99.7%. In particular, encapsulation efficiencies of at least 90%, 92%, 94%, 96%, 98%, or 99% are achieved.The oil-in-water emulsions can be prepared by emulsifying an oil phase into an aqueous phase by interfacial crosslinking polymerization where the biobased polyphenols act as crosslinkers and surface-active monomers. In an alternative embodiment of the present invention the oil-in-water emulsions can be prepared using typical external emulsifier agents.Thus, the microcapsules of the present invention may be prepared by a process which comprises: a1) providing an organic phase comprising a hydrophobic benefit agent in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanate functional groups, on a polyfunctional isocyanate-to-oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10, wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the biobased polyphenol has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to- aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature; where warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C.The stabilizer may be added at high temperature or at a lower temperature, up to room temperature.This process is advantageous because preparations can be conducted without the need of additional emulsifying agents like polyvinyl alcohol. The process is based on the reaction of terminal and intermediate phenolic groups along with non-phenolic groups of a biobased polyphenol such as for instance, within mono, di and tri-pyrogallol-residuespresent in the polyphenol (named crosslinker 2) and / or aliphatic hydroxyls present in crosslinker 2, and isocyanate groups present in the polyisocyanate (named crosslinker 1). In a particular embodiment, both crosslinkers are oligomeric species.Polyphenols surface active character, in particular, Tannins’ surface-active character is activated by increasing the pH. In a particular embodiment, in combination with any of the embodiments above or below, the pH value of the aqueous solution of a biobased polyphenol is of from 2 to 14. In another particular embodiment, the process for preparing the microcapsules of the present invention comprises providing an aqueous solution of a biobased polyphenol at a pH value of from 3 to 14. In another particular embodiment, the process for preparing the microcapsules of the present invention comprises providing an aqueous solution of a biobased polyphenol at a pH value of from 5 to 13 and in particular, at a value of 8.5 measured with a calibrated pH-meter.In a particular embodiment, in combination with any of the embodiments above or below, , the process for preparing the microcapsules of the present invention is that where the polyfunctional isocyanate-to-oil weight ratio is of from 0.5 / 99.5 to 5 / 95. In another particular embodiment, in combination with any of the embodiments above or below, the process for preparing the microcapsules of the present invention is that where the weight ratio of a polyfunctional isocyanate-to-oil is of 1 / 99.In a particular embodiment, in combination with any of the embodiments above or below, the process for preparing the microcapsules of the present invention is that where the weight ratio or organic-to-aqueous phase in the oil-in water emulsion is of from 0.4 to 0.6. In another particular embodiment, in combination with any of the embodiments above or below, the process for preparing the microcapsules of the present invention is that where the weight ratio or organic-to-aqueous phase is 0.5.In another particular embodiment, in combination with any of the embodiments above or below, the process for preparing the microcapsules of the present invention is that where the oil in water emulsion step is conducted at a temperature comprised in the range from room temperature (20-25°C) to 70 °C. In another particular embodiment, the process for preparing the microcapsules of the present invention is that where the oil in water emulsion step is conducted at a temperature comprised in the range from 50 to 60 °C. The curing step is conducted for the necessary period of time. The time can naturally vary according to the reactants used. In a particular embodiment, the curing time is around 0.5 to 5 hours.This process allows obtaining fragrance microcapsules where the emulsion upon which the capsules are built is stabilized solely with the comonomer. In a particular embodiment of any of the processes indicated above for the preparation of microcapsules according tothe invention, the hydrophobic benefit agent to be encapsulated is an undiluted fragrance.A stabilizer can be added for thickening-to-application. Generally, a small amount is used, which is below 0.5% in weight with respect to the weight of the emulsion. In a particular embodiment, such amount is 0.3% in weight with respect to the final product. This process allows obtaining an active material microcapsule slurry free of agglomerates with approximately 31 % of non-volatile content, particularly a fragrance microcapsule slurry free of agglomerates.A microcapsule slurry for consumer products obtainable by the process disclosed above, including any embodiments or combination of embodiments is also considered part of the invention. The preparation process features allow defining the microcapsule according to the invention in an even more precise way.Thus, the microcapsules of the present invention may also be prepared by a second process which comprises: b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in an benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to-solution weight ratio of from 0.15 to 4.5, wherein the polyfunctional isocyanate has at least two isocyanate functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); b2) providing an aqueous solution of emulsifier in a concentration 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to-aqueous weight ratio from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsules to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature; where warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C.The present inventors found that some organic solvents improve the compatibilization of tannins within the organic phase. For instance, tannins can first be dispersed in the organic phase along with the oil soluble co-monomer (typically an isocyanate) for later being reacted both in-situ within the organic phase and also interfacial-wise. Advantageously, since the reaction is carried out within the organic phase, side reactionswith water (particularly with the isocyanate) can be minimized.The organic solvent also allows the preparation of tannin-fragrance solutions with fragrances of varying olfactive family and physicochemical profile.An emulsifier can be used as a dispersant to keep the O / W dispersion stable.This process has also several advantages as for instance, including both reagents (crosslinker 1 and 2) in the same phase can foster reactivity. Since the biobased polyphenol is confined between the organic phase and the interface its complete reaction (usually hindered) is strongly favored.In a particular embodiment of the second process the present invention, in combination with any of the embodiments above or below, the organic phase is prepared by preparing a pre-solution of the biobased polyphenol in a solvent, for instance at a concentration of 10% in weight in a suitable organic solvent.In another particular embodiment of the second process of the present invention, in combination with any of the embodiments above or below, the solution of biobased polyphenol in an organic solvent is added to an undiluted active material such as undiluted fragrance oil in an benefit agent to solution weight ratio of from 1 to 1000; In another particular embodiment of the process, the benefit agent to solution weight ratio of from 5 to 750. In another particular embodiment of the process, the benefit agent to solution weight ratio of from 10 to 500.In another particular embodiment, in combination with any of the embodiments above or below, the polyfunctional isocyanate which is added to the previous solution is an oligomeric adduct of xylene di-isocyanate and trimethylol propane in a solvent such as ethyl acetate.In another particular embodiment of the second process, in combination with any of the embodiments above or below, the dispersion of polyfunctional polyisocyanate-to-pre- solution is in a weight ratio of from 0.25 to 0.6. In another particular embodiment of the second process, in combination with any of the embodiments above or below, the dispersion of polyfunctional polyisocyanate-to-pre-solution is in a weight ratio of 0.5-0.6.The weight ratio between pre-solution and biobased polyphenol can be selected so as to tune the properties of the nascent polymer wall.In another particular embodiment of the second process, in combination with any of the embodiments above or below, the emulsifier has a concentration in the aqueous solution of emulsifier from 0.1-10% in weight. In another particular embodiment of the process, in combination with any of the embodiments above or below, the emulsifier has aconcentration from 0.5-10% in weight.In another particular embodiment of the second process, in combination with any of the embodiments above or below, the emulsifier is a polyvinyl alcohol. In another particular embodiment of the process, the aqueous phase consists of a polyvinyl alcohol solution which has a concentration of 0.1-10 % in weight.In another particular embodiment of the second process, in combination with any of the embodiments above or below, the process for preparing the microcapsules of the present invention is that where the weight ratio or organic-to-aqueous phase is from 0.3 to 0.9.In another particular embodiment of the second process, in combination with any of the embodiments above or below, the oil in water emulsion step is conducted at a temperature comprised in the range from room temperature (20-25°C) to 70 °C. In another particular embodiment of the process, the oil in water emulsion step is conducted at a temperature comprised in the range from 50 to 60 °C. The curing step is conducted for the necessary period of time. In a particular embodiment, the curing time is around 0.5-5 hours.In any of the processes disclosed above for the preparation of the microcapsules of the present invention, the synthesis of polyurethanes can optionally be assisted by the addition of suitable catalysts. Typically, either tertiary amines, metal-based catalysts, or a mixture of both types of catalysts can be used to tune the resulting properties of obtained polymers. Examples of suitable catalysts include N-R1.R2.R3 species (in which R1, R2 or R3 represent aliphatic chains of varying length, e.g. triethyl amine (TEA) for which all groups would be ethyl groups). Another suitable catalyst is1,4-diazo-(2,2,2)-bicyclo-octane (DABCO) which is a very efficient catalyst, especially suitable for the purposes of the present invention. Another diamine that can be used to catalyze urethane formation reactions is N,N,N,N-tetramethylbutanediamine (TMBDA). Other examples of appropriate catalysts are Tin (dibutyl tin di-laurate DBTDL), iron, and bismuth (bismuth neo decanoate) based catalysts.In any of the processes disclosed above for the preparation of the microcapsules of the present invention, the droplets generally have a particle size distribution from 1 to 100 pm quoted as the median volume-based diameter Dv

[0050] measured with a dynamic light scattering instrument such as a Malvern Master sizer 3000 (DLS). In another particular embodiment from 1 to 60 pm. In another particular embodiment from 1 to 40 pm. In another particular embodiment, from 1 to 25 pm. In another particular embodiment, from 5 to 25 pm. In another particular embodiment from 10-to 25 pm.In any of the processes disclosed above for the preparation of the microcapsules of thepresent invention, the slurry comprising the microcapsules resulting from the oil-in water emulsion may comprise microcapsules having particle size distribution from 1 to 100 pm quoted as the median volume-based diameter Dv

[0050] measured with dynamic light scattering using a Malvern Master sizer 3000 (DLS). In another particular embodiment from 1 to 60 pm. In another particular embodiment from 1 to 40 pm. In another particular embodiment, from 1 to 25 pm. In another particular embodiment, from 5 to 25 pm. In another particular embodiment from 10-to 25 pm.In any of the processes disclosed above, when in step a6) or b6) the microcapsules are cooling down, generally, they are cooling down until room temperature (20-25°C).In a particular embodiment, in combination with any of the embodiments above or below, the microcapsules are isolated and dried. In any of the processes disclosed above for the preparation of the microcapsules of the present invention, the isolation of the microcapsules from the reaction medium may be conducted by centrifugation, decantation or any other appropriate means.In any of the processes disclosed above for the preparation of the microcapsules of the present invention, in combination with any of the embodiments above or below, the drying of the microcapsules may be conducted, for instance, by spray-drying, heat drying, and belt drying to a solid form. In a spray drying process, a spray- dry carrier may be added to a microcapsule composition to assist the removal of water from the slurry. The spray dry carriers can be selected from the group of carbohydrates such as chemically modified starches and / or hydrolyzed starches, gums such as gum Arabic, proteins such as whey protein, cellulose derivatives, clays, synthetic water-soluble polymers and / or copolymers such as polyvinyl pyrrolidone, polyvinyl alcohol. The spray dry carriers may be present in an amount from 1 to 50%, more preferably from 5 to 20%, by weight of the microcapsule composition in slurry.In a particular embodiment, in any of the processes disclosed above for the preparation of the microcapsules of the present invention, in combination with any of the embodiments above or below, the processes consist of the mentioned steps.A microcapsule for consumer products obtainable by the two processes disclosed above, including specific processes including any feature of the particular embodiments either for the product or for the process, is also considered part of the invention.Microcapsules prepared using this invention perform better than their surfactantcontaining comparative examples both analytically and sensorially. Tannins’ surfaceactive character is activated increasing the pH. Thus, the use of the microcapsule as defined above as delivery system for delivering an active material is also part of theinvention. In particular, for controlled release of the active material. This aspect can also be formulated as a method for delivering an active material comprising using microcapsules as defined above. In a particular embodiment of the method, the method comprises adding the microcapsules of the present invention to a consumer product.A microcapsule slurry comprising a plurality of the microcapsules as defined above dispersed in an aqueous phase is also part of the invention. The concentration of the slurry can be adjusted and can be incorporated directly into formulations. In a particular embodiment, the microcapsules in the slurry have a particle size distribution of 1-100 pm. The preferred embodiments of the particle size of the microcapsules are also particular embodiments for the microcapsule slurry. The microcapsule slurry may be prepared by any of the processes disclosed above, but without performing an isolation and drying step.The slurry comprising the microcapsules resulting from the oil-in water emulsion may comprise microcapsules having particle size distribution from 1 to 100 pm quoted as the median volume-based diameter Dv

[0050] measured with dynamic light scattering using a Malvern Master sizer 3000 (DLS). In another particular embodiment from 1 to 60 pm. In another particular embodiment from 1 to 40 pm. In another particular embodiment, from 1 to 25 pm. In another particular embodiment, from 5 to 25 pm.A composition comprising either microcapsules as defined above or microcapsule slurries as defined above, together with appropriate excipients and / or carriers is also part of the invention. The composition covers cosmetic compositions, dermatological compositions, dietetic compositions, or food compositions, among others.An appropriate excipient of carrier is that which is recognized as safe and non-toxic for the intended route of administration (cosmetic, dermatological , or oral dietetic / edible). It performs one of the usual technological functions of an excipient without impairing the stability or release of the claimed microcapsules / slurry. Appropriate excipients and / or carriers are cosmetically acceptable excipients or carriers, dermatological acceptable excipients or carriers, dietetically acceptable excipients or carriers, or edible excipients or carriers.Finally, a consumer product for controlled release of the hydrophobic benefit agent comprising either the microcapsules as defined above, the slurry as defined above, or the composition as defined above is also part of the invention.Preferably the consumer product is baby care, beauty care, fabric & home care, family care, feminine care, health care products or devices intended to be used in the form in which it is sold, and not intended for subsequent commercial manufacture or modification. Such products include but are not limited to wipes; products for and / or methods relating totreating hair (human, dog, and / or cat), including, bleaching, coloring, dyeing, conditioning, shampooing, styling; deodorants and antiperspirants; personal cleansing; skin care including application of creams, lotions, and other topically applied products for consumer use; and shaving products, products for and / or methods relating to treating fabrics, hard surfaces and any other surfaces in the area of fabric and home care, including: car care, dishwashing, fabric conditioning (including softening), laundry detergency, laundry and rinse additive and / or care, hard surface cleaning and / or treatment, and other cleaning for consumer or institutional use.Throughout the description and claims the word “comprise” and variations of the word, are not intended to exclude other technical features, additives, components, or steps. Furthermore, the word “comprise” encompasses the case of “consisting of”. Additional objects, advantages and features of the invention will become apparent to those skilled in the art upon examination of the description or may be learned by practice of the invention. The following examples and drawings are provided by way of illustration, and they are not intended to be limiting of the present invention. Reference signs related to drawings and placed in parentheses in a claim, are solely for attempting to increase the intelligibility of the claim and shall not be construed as limiting the scope of the claim. Furthermore, the present invention covers all possible combinations of particular and preferred embodiments described herein.ExamplesIn the examples below, all percentages are referred to a weight basis unless stated.Example 1: Hydrophobic benefit agents used in the invention.The composition of a fragrance safe for its use as hydrophobic benefit agent in Pll capsules is included below. Name: Mathilda; Number of perfumery raw materials: 21; Profile: fruity-aldehydic, clogPm=2.85.Example 2: Preparation of a polyurethane microcapsule containing a fragrance without using external emulsifying agents.Crosslinker 1 consists of a series of oligomeric adducts of xylene di-isocyanate (XDI) and trimethylolpropane (TMP) sold under the trademark Takenate D-110N available from Mitsui Chemicals. The product is thinned with a 25% of ethyl acetate, has an approximate weight average molecular weight of 1300 g / mol according to the supplier and a net eguivalent weight of 273.9 g / eg (as undiluted product based on the percentual free isocyanate content).Crosslinker 2 is a polyphenol, particularly a hydrolysable gallotannin, with a sugar core of (d-glucose) with molecular weights between 800 and 1500 g / mol. The polyphenol is sold as a solid material of high monodispersity in terms of molecular weight distribution sold under the trademark Tanal™ 02 available from Ajinomoto / Omnichem.An organic phase was prepared by thoroughly mixing an undiluted fragrance and crosslinker 1 (commercial product containing 25% of ethyl acetate) on a crosslinker 1-to- oil weight ratio of 1 / 99.An agueous phase which consisting of an agueous solution of Crosslinker 2 was prepared by adjusting the pH to 8.5 by adding the reguired amounts of a stock solution of 5% sodium hydroxide, typically representing a 0.5% of the total slurry. The concentration of Crosslinker 2 was set to tune the properties of the nascent polymer wall and adeguatelystabilize the dispersed phase. For the present example an NCO / OH ratio of unity was aimed.An oil-in-water emulsion was prepared by combining an organic and an aqueous phase in an organic-to-aqueous weight ratio of 0.53 and shearing them with an UltraTurrax™ for 1.5 minutes at 10000 rpm until an average particle size of 10-25 pm was obtained.The afore-prepared emulsion was loaded into a three-necked reaction vessel equipped with a mechanical stirrer, a pH meter and a nitrogen gas inlet. The stirrer was switched on, nitrogen was used to blanket the product, and temperature was increased in a controlled manner until 55°C were reached from room temperature in approximately 30 minutes.Later, the emulsion underwent a curing step of 180 minutes maintaining a constant temperature of 55°C. After 180 minutes the slurry was diluted with the necessary amount of water to reach final fragrance load (30% in the present example) and was thickened to application with a 0.3% of a stabilizing agent (e.g. Keltrol RD available from CP Kelco).A fragrance microcapsule slurry free of agglomerates with approximately a 31.1% of drycontent content was obtained.A polyurethane polymer was obtained from the reaction of terminal and intermediate phenolic or aliphatic hydroxyl groups present in crosslinker 2, and isocyanate groups present in crosslinker 1.Example 3: Preparation of a polyurethane microcapsule containing a fragrance with the use of external emulsifying agent.Example 3 uses the same recipe as per Example 2 but incorporates an external emulsifying agent in the aqueous phase.An aqueous phase was prepared in three steps. A stock solution of polyvinyl alcohol and deionized water were mixed aiming an external emulsifier concentration of 1% (on a dry basis with respect to the aqueous phase. Later, the pH of the solution was increased to 8.5 adding a dilute sodium hydroxide solution. Finally, a crosslinker 2 aqueous stock solution was added under stirring to the afore prepared solution containing the external emulsifying agent. A light-orange solution was obtained.An organic phase was prepared by thoroughly mixing an undiluted fragrance and crosslinker 1 (commercial product containing 25% of ethyl acetate) on a crosslinker 1-to- oil weight ratio of 1 / 99.Example 4: Preparation of a polyurethane microcapsule containing a fragrance without using external emulsifying agents.Example 4 uses the same recipe as per Example 2 but considered a fragrance-to-polymer ratio (F / P) of 30. A fragrance microcapsule slurry free of agglomerates with approximately a 31.3% of dry-content content was obtained.Example 5: Preparation of a polyurethane microcapsule containing a fragrance without using external emulsifying agents.Example 5 used the same recipe as per Example 2 but considered a fragrance-to-polymer ratio (F / P) of 25. A fragrance microcapsule slurry free of agglomerates with approximately a 31.47% of dry-content content was obtained.Comparative Example 1 : Preparation of a melamine formaldehyde microcapsule used as benchmark.A thin shelled melamine formaldehyde (MF) slurry containing the fragrance disclosed in Example 1 was prepared and used as a benchmark. Samples were produced as Example F in W02015110568A1 with the following modifications or specifications:• The concentration of fragrance was lowered to 30%. The retrieved amount of fragrance was substituted by water.• The aqueous phase was left to pre-polymerize at 25°C for 15 minutes which coincided with the solubilization of Takenate D110 N (mix of oligomers consisting of adducts of trimethylolpropane and xylene diisocyanate available from Mitsui Chemicals as a material thinned with a 25% of ethyl acetate) in the oil also carried out at 25°C. Both phases were subsequently combined after this time and high sheared to obtain an emulsion of the desired size.• The 90 / 10 blend of Cymel® 385 and Cymel® 9370 (both high amino partially alkylated melamine-formaldehyde prepolymers available from Cytec as 70% active content products) were substituted by the equivalent amount of Cymel® 385 (sourced from Allnex as an 80% active content material).• Alcapsol 200 (acrylamide-acrylic acid 50:50 linear copolymer available from BASF (ex Ciba) as a 20% aqueous solution) was substituted by the equivalent amount of Floset Caps 150 RLV (acrylamide-acrylic 50:50 partially branched copolymer available from SNF as a 16% aqueous solution).• A heating rate of approximately 1°C / min was imposed from room temperature (25°C) to reaction conditions (90°C).• The deposition agent Salcare® SC60 (ex. Ciba, added in example F as a 3% aqueous solution) was not included in the formulation. The equivalent quantity was substituted by water.• For thickening to application, a 0.3% of xanthan gum (e.g. Keltrol RD available from CP Kelco) was added after the neutralization step and left to swell in the slurry under stirring for 60 minutes.• Formaldehyde was scavenged during the process adding sufficient ethylene urea (BASF). Approximately a ratio of scavenger / active MF resin of 2.8 was required to bring formaldehyde levels well below 100 ppm.A fragrance microcapsule slurry free of agglomerates with approximately a 35.5% of dry content with a formaldehyde concentration <100ppm was obtained.Example 6: Preparation of a polyurethane microcapsule having both crosslinkers in the same phase.In this example in-situ polymerization was used instead of interfacial polymerization. Particularly, the reaction was carried out in the organic phase. Both crosslinker 1 and 2 are the same used in Example 2. The F / P of the present example is 77.5 which represents approximately 3 times less polymer content than Comparative Example 1.An organic phase was prepared in three stages. First a 10% pre-solution of Crosslinker 2 in 1 ,3 dioxolane was prepared. Crosslinker 2 is readily soluble in the solvent and produces a homogeneous transparent light-orange solution and a small exothermicity. Secondly, this solution was added to undiluted fragrance oil in a pre-solution-to-fragrance weight ratio of 1 / 40 followed by thorough mixing. The aspect of the mixture progressively changed from opalescent to transparent but, most importantly, Crosslinker 2 remained soluble in the mixture for at least 30 minutes after its addition and did not precipitate upon the addition of other ingredients to the organic phase (e.g., Crosslinker 1). Finally, Crosslinker 1 was subsequently added to the afore prepared dispersion in a crosslinker 1- to-pre-solution weight ratio of 1 / 1.8. The weight ratio between pre-solution and Crosslinker2 was selected to tune the properties of the nascent polymer wall. In the present example an NCO / OH ratio of unity was aimed.An aqueous phase was prepared combining a stock solution of aqueous polyvinyl alcohol (e.g. a 10% solution) and water to obtain a final polyvinyl alcohol (PVA, e.g. Celvol 04 / 88 available from Sekisui) concentration of 1% in the aqueous phase.An oil-in-water emulsion was prepared by combining an organic and an aqueous phase in an organic-to-aqueous weight ratio of 0.455 and shearing them with an UltraTurrax™ for 2 minutes at power 3 / 6 until an average particle size of 10-25 pm was obtained.The afore prepared emulsion was loaded into a three-necked reaction vessel equipped with a mechanical stirrer and a nitrogen inlet. The stirrer was switched on, nitrogen was flushed continuously, and the vessel was immersed in a heating bath pre-heated at 55°C.Later, the emulsion was left to react for 140 minutes. After 140 minutes a solid stabilizer (Keltrol RD available from CP Kelco) was added as 0.3% of the total slurry for thickening- to-application. After the addition, the heat was removed, and the product was left to slowly cool down to 30°C whilst stirring in approximately one hour.A fragrance microcapsule slurry free of agglomerates with approximately a 31.3% of dry content was obtained.Example 7: Encapsulation efficiencyThe present example shows that capsules of the present invention, despite being prepared with low fragrance-polymer weight ratios, the resulting low polymer content can properly coat fragrance droplets and efficiently encapsulate the fragrance.Encapsulation efficiency (EE) is measured by GC-FID versus a calibration curve of fragrance dilutions in hexane (ACS grade, Sigma Aldrich). Samples were obtained from ahexane-extraction carried out using a slurry: absorbent: hexane weight ratio of 1 :1 :20. The absorbent was high molecular weight potato starch, used as received (Sigma Aldrich).In short: Sample preparation required weighing one gram of slurry and one gram of absorbent in a 50 ml falcon vial. The vial was capped and gently shaken to mix both components and thicken the slurry turning it into a paste. Later, twenty grams of hexane were loaded into the vial. The content of the vial was shaken gently twenty times and left to decant for 5 minutes. A 5 ml syringe was then used to retrieve an aliquot of the clear supernatant to be later transferred to a chromatography vial previous filtration through a 0.45-micron nylon syringe filter. Each sample was analyzed by duplicate. The calibration curve (signal intensity (S) vs free fragrance oil concentration (FO), linear R2>0.995, 3 data values aiming 0.5%, 0.1% and 0.05% fragrance in hexane, a=intercept and b=slope) was prepared dissolving a known amount of fragrance in hexane (parent solution) and subsequently diluting it with additional hexane: S = a + b ■ FO. EE was estimated using a mass balance (assuming high EE). As such, total initial fragrance (w° , typically 30% in the mass of the slurry ms) has been either encapsulated or not encapsulated (free fragrance oil). The mass of solvent (mh) used in the extraction is also accounted.These results show that the polymer in the present invention is capable of safely encapsulating most of the fragrance and that despite reducing the quantity of polymer per capsule, this does not negatively impact its ability to encapsulate the fragrance efficiently. In addition, no further correction will be necessary for leakage measurements given the excellent encapsulation efficiency achieved.Example 8: Mechanical and chemical stability of the microcapsules in fabric softener.The present example is included to show that capsules discussed in the invention, despite having a high fragrance-to-polymer weight ratio (i.e. , containing low polymer quantities), can mechanically and chemically withstand base incorporation, machine wash and line drying. No free oil was added for the trials.Softener solutions were prepared according to the following recipe. In short, a cationic surfactant in paste format (e.g. Tetranyl L6 / 90, a 10% isopropyl alcohol thinned partially hydrogenated tallow oil quaternary ammonium salt, available from Kao Chemicals), was warmed to 50°C in a water batch, thoroughly homogenized before being scooped and added to warm water (55°C) under stirring (overhead stirrer, 1000 rpm). Later, the surfactant solution is left to cool-down to room temperature. Once room temperature is achieved, calcium chloride solution is added, followed by the preservative (e.g. Kathon CG, a liquid mixture of halogenated and non-halogenated isothioazolidones, available from Dow).A milky-white, pourable concentrated fabric softener solution with a dry content of approximately 12% and a pH between 2.5 and 3.5 was obtained.Later, the prepared softener base was split into several portions and combined with microcapsule slurries for microscopy studies, machine washes along with olfactive and analytical stability studies (fragrance leakage in base). Aliquots of different microcapsule slurries_were diluted in deionized water to form a homogeneous 20% dispersion and further dispersed under stirring in a 12% fabric softener base. The previous dilution was added to the fabric softener until a 0.2% dosage of slurry was met. All applications aimed at a neat oil equivalent (NOE) of 0.06%.(*% must be adapted to meet target NOE based on slurry dosage, slurry concentration in the aqueous solution and fragrance load in the slurry).Comparatively, other softener / slurry applications were prepared without pre-diluting the slurry in water.(*% must be adapted to meet target NOE based on slurry dosage, slurry concentration in the aqueous solution and fragrance load in the slurry).Firstly, in-base incorporation of slurries was studied via optical microscopy. In short: aliquots from slurry-containing softener applications (prepared with and without predilution) were put in the microscope and the presence of capsules and agglomerates was ascertained.In-base compatibility of the microcapsules proposed in the following invention is better than those of the melamine formaldehyde benchmarks as no pre-dilution is required to achieve proper in-base incorporation. This suggests that selected examples of the present invention are more compatible with exemplary softener bases than their melamineformaldehyde counterparts.Secondly, machine washes (30°C, 30 minutes at 900 rpm) were carried out using a European front load washing machine (Miele, Mod: WCD320). Unscented terry cottontowels (approx. 30x30 cm with a grammage 450 g / m2) were loaded in the machine. All fabric used in trials was pre-conditioned before use washing 50 towels with 30 g of commercial unscented liquid detergent (Norit sensible, AC Marca). After the preconditioning wash, the fabric was vacuum dried (2.5 hours cycle), folded and stored in clean and dry closed plastic containers until used.For a typical test, a total fabric ballast of 2000 g was targeted (400g of terry towels 1600g of flat cotton (100 g / m2)). Regardless of the application (detergent or softener), 30g of the capsule containing application was loaded in the drawer and automatically dosed during the laundering cycle at specific moments.The towels were line dried for at least 24h and rated blindly by an experienced panel of ten panelists. Both pre and post rub olfactive intensities were rated within an absolute scale from 1 (no odor) to 7 (extremely strong). As such, in the absence of free oil, individual post rub intensity scores should always be higher or equal than corresponding pre rub scores.Evaluation results show that the capsules of the present invention outperformed the benchmark both at pre (noticeable fragrance scent before rubbing) and at post rub (after handling, tossing, and rubbing the fabrics).Example 9: Mechanical and chemical stability of the microcapsules in concentrated laundry detergentThe present example is included to show that capsules discussed in the invention, despite having a high fragrance-to-polymer weight ratio (i.e., containing low polymer quantities), can mechanically and chemically withstand base incorporation, a harsher machine wash (when compared versus softener bases) and line drying. No free oil was added for the trials.Liquid detergent solutions were prepared according to the following recipe. In short, deionized water, propylene glycol and glycerol were mixed and warmed up to 55°C under moderate stirring (overhead stirrer, 700 rpm). Later, triethanolamine was added followedby dodecylbenzenesulphonic acid (e.g. Sulfonax available from Kao corporation) and the mixture was left to homogenize for 20 minutes. Subsequently, the pH was adjusted to 7.25 using a first portion of 50% aqueous sodium hydroxide solution and the mixture is left to cool down to 35°C. After reaching 35°C, sodium laureth sulphate (e.g. Texapon N25 available from BASF) and an ethoxylated C12-C15 alcohol (e.g. pre-melted Synperonic A7L available from Croda) were carefully added. Finally, an antifoaming agent (e.g. Silfoam SD 168), a sequestering agent (e.g. tetrasodium salt of EDTA) and a preservative (e.g. Kathon CG, a liquid mixture of halogenated and non-halogenated isothioazolidones, available from DOW) were sequentially added. Before unloading the product, the pH was adjusted between 8-9 with a second portion of 50% sodium hydroxide solution.A transparent, low odor, pourable, light orange homogeneous solution was obtained with a dry content of approximately 40% and a pH between 8 and 9.Later, the afore-prepared concentrated laundry detergent base was split into several portions and combined with microcapsule slurries for microscopy studies, machine washes along with olfactive and analytical stability studies (fragrance leakage in base). Aliquots of different microcapsule slurries were diluted in deionized water to form a homogeneous 20% solution and further dispersed under stirring in the 40% concentrated laundry detergent base. The previous dilution was added to the fabric softener until a 0.3% dosage of slurry was met. All applications aimed at a neat oil equivalent (NOE) of 0.09%.Formula(*% must be adapted to meet target NOE based on slurry dosage, slurry concentration in the aqueous solution and fragrance load in the slurry).Comparatively, other softener / slurry applications were prepared without pre-diluting the slurry in water.(*% must be adapted to meet target NOE based on slurry dosage, slurry concentration in the aqueous solution and fragrance load in the slurry).In short: aliquots from slurry-containing detergent applications (prepared with and without predilution) were put in the microscope and the presence of capsules and agglomerates was ascertained.Example 10: Long term stability of the microcapsules of the present invention in consumer bases Applications (concentrated softener and laundry detergent) containing capsules were stored at 40°C for up to 4 weeks. Slurries were pre-diluted and dosed in the bases as aqueous 20% solutions. Fragrance leakage was monitored over time coupling sorptive bar solid extraction (SBSE) and gas chromatography.The gas chromatograph (Agilent Technologies, Mod:7890) was equipped with a flame ionization detector, a mass spectrometer, a cooling injection system (CIS), a multipurpose robotic arm and a thermal desorption unit (TDU). The column used for the separation was made of 100% dimethylpolysiloxane (60 m x 0.32 mm x 0.25 pm).In detail, aged samples were diluted at 0.5 % in water and 15 g of such solution were placed in a 20 ml screwcap scintillation vial. Polydimethylsiloxane Twister™ absorption beads (Gerstel, Ref: 102011333-001-00) were left to swell in such solution for 60 minutes at room temperature. The beads were magnetically suspended using a ring-shaped magnetic holder (Gerstel, Ref: 019184-010-00) and each vial contained an octagonal magnetic pivot ring stirrer. During the test, leaked fragrance raw materials were transferred from the diluted base into the solid support.After 60 minutes, the twister was retrieved from the scintillation vial, rinsed with deionized water, carefully dried with tissue paper, placed in an empty glass desorption tube, and hermetically capped (Gerstel, Refs: 013010-010-00 and 012423-010-00). Later, each tube was thermally desorbed.A reference sample was prepared pre-loading an unscented pristine base with free fragrance. The same NOE aimed at the application was used as a 100% loss reference.The results for softener applications are summarized in the following table:The results show that the prototype developed in the present invention has a different release profile in base to that of MF but on overall, the amount of fragrance loss in base is lower than that of the MF benchmark. Thus, the prototype is more stable in base.Example 11 : Elemental analysis of the microcapsule’s wall as a way to quantify the inclusion level of tannins in the polymeric shellA sample of a slurry prepared in example 2 but without the addition of Xanthan Gum was taken and treated as in G. Gasparini et al.; “Quantification of Residual Perfume by Py- GC_MS in Fragrance Encapsulate Polymeric Materials Intended for Biodegradation tests”, Molecules 2020, 25, 718. For quantification of residual perfume by PY-GC-MS in fragrance encapsulate polymeric materials intended for biodegradation tests see the same document. The isolated polymer shell was obtained in the form of a white powder devoid from all fragrance ingredients, solvents and moisture. In addition, the purification of the capsule shell also eliminates materials and other biopolymers that may interact with the shell or be close to it but do not conform the same material.The capsule’s shell monomers, namely the tannin and the isocyanate, were vacuum dried at 20°C until constant weight was obtained. Both were stored under nitrogen inert atmosphere until used.Samples of the monomers and of the polymer were submitted for elemental analysis. The reaction between a given polyol (in this case, the tannin) and an isocyanate would yield a urethane polymer with a nitrogen content corresponding to the weight averaged value (X^hel1) of the individual nitrogen contents of both monomers ( ^“k, X^annin). That is: A v Shell > yTak.,,Pol i vTannin..,Pol N — ANWTak-f- ANwTanninNote w °kland w^°„ninwould correspond to the percentual contribution of each monomer to the final shell. These values can be checked against the composition used in the recipe (namely, the amount of each monomer used in composing the polymer orwTak,Thanc^wTannin,Th) ■The calculation of w^°klTh(75% purity) using the composition data in example 2 is also attached for reference:„ , 0.922Wrak’Th~ 0.922 * 75Since the tannin is essentially free of nitrogen the calculation can be simplified to:81.7 %w / w.The contribution of the tannin to the polymer conforming the microcapsule’s wall can be calculated by difference:It must be highlighted that w^°klis approximately equal to w^°k Thand thatis approximately equal tothus proving the validity of the results on the composition of the polymer, calculated from the weights of ingredients used to form the capsule wall.ClausesClause 1. A microcapsule for consumer products, which comprises: a) a hydrophobic benefit agent, optionally solubilized or dispersed in a suitable organic solvent, and b) a wall encapsulating the hydrophobic benefit agent; wherein: the wall is a polyurethane polymeric wall which comprises: a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol; the polyfunctional isocyanate has at least two isocyanates functional groups; the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC); the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); the amount of biobased polyphenol in the polymeric wall is from 15 to 75% by weight based on elemental analysis of the wall; and the hydrophobic benefit agent / polymer weight ratio (F / P) is from 15 to 120; with the proviso that when the polymer comprises a moiety from a lignin, then the hydrophobic benefit agent / polymer ratio (F / P) is from 30 to 120.Clause 2. The microcapsule according to clausel , which is free of any other substance acting as emulsifying agent.Clause 3. The microcapsule according to any of the clauses 1-2, wherein the polyphenol is a tannin.Clause 4. The microcapsule according to clauses, wherein the hydrolysable tannin is selected from the group consisting of tannic acid, a gallotannin, an ellagitannin, and a mixture thereof.Clause 5. The microcapsule according to any of the clauses 1-4, wherein the polyfunctional isocyanate is selected from an aromatic polyisocyanate, a modified polyisocyanate, and a mixture thereof.Clause 6. The microcapsule according to clause 5, wherein the polyfunctional isocyanate group is selected from xylene di-isocyanate, and a mixture of xylene di-isocyanate with trimethylol propane di-isocyanate.Clause 7. The microcapsule according to any of the clauses 1-6, wherein the active material comprises a fragrance, flavour, agricultural active, pesticide, insecticide, herbicide, fungicide, pharmaceutical active, nutraceutical active, animal nutrition active, food active, microbio active, malodour counteractant, cosmetic active, UV protection agent, fabric softener active, hard surface cleaning active, skin or hair conditioning agent, flame retardant, dyestuff, antistatic agent, chelating, disinfecting agent, and / or natural active.Clause 8. The microcapsule according to clause 7, wherein the active material comprises a fragrance.Clause 9. The microcapsule according to any of the clauses 1-8, obtainable by a process which comprises: a1) providing an organic phase comprising a hydrophobic benefit agent in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanate functional group, on a polyfunctional isocyanate-to- oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10; wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to- aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature; or, alternatively, obtainable by a process which comprises: b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in a hydrophobic benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to- solution weight ratio of from 0.15 to 4.5; wherein the polyfunctional isocyanate has at leasttwo isocyanate functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography; b2) providing an aqueous solution of an emulsifier in a concentration 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to-aqueous weight ratio from 0.3 to 0.9 and shearing the mixture until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature.Clause 10. A process for the preparation of the microcapsules as defined in any of the clauses 1-9, which comprises: a1) providing an organic phase comprising hydrophobic benefit agent in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanates functional groups, on a polyfunctional isocyanate-to-oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10; wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by measured by size exclusion chromatography; a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to-aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature; or, alternatively, a process which comprises: b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in a hydrophobic benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to-solution weight ratio of from 0.15 to 4.5; wherein the polyfunctional isocyanate has at least two isocyanate functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by measured by size exclusion chromatography; b2) providing an aqueous solution of an emulsifier in a concentration 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to-aqueous weight ratio from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsules to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature.Clause 11. Use of the microcapsule according to any of the clause 1-9, as delivery systems for delivering a hydrophobic benefit agent.Clause 12. A microcapsule slurry comprising a plurality of the microcapsules as defined in any of the clause 1-9, dispersed in an aqueous phase.Clause 13. The microcapsule slurry according to clause12, wherein the microcapsules have a particle size distribution from 1 to 100 pm quoted as the median volume-based diameter Dv

[0050] measured with dynamic light scattering using a Malvern Master sizer 3000 (DLS).Clause 14. A composition comprising either microcapsules as defined in any of the clauses 1-9 or a slurry as defined in any of the clause 12-13, together with appropriate excipients and / or carriers.Clause 15. A consumer product for controlled release of the hydrophobic benefit agent comprising either the microcapsules as defined in any of the clauses 1-9, the microcapsule slurry as defined in any of the clauses 12-13, or the composition as defined in clause 14.Citation ListNon-Patent LiteratureIUPAC (Gold book, 3rdedition 2019 online version 3.0.1)ISO 1625:1998 “Plastics — Polymer dispersions — Determination of non-volatile matter (residue) at specified temperatures.F. Melone et al.; “Tannin Structural Elucidation and Quantitative 31 P NMR Analysis. 2. Hydrolyzable Tannins and Proanthocyanidins”, Journal of Agriculturaland Food Chemistry, 2013, vol. 61 , pp. 9316-9324.G. Gasparini et al.; “Quantification of Residual Perfume by Py-GC_MS in Fragrance Encapsulate Polymeric Materials Intended for Biodegradation tests”, Molecules2020, 25, 718.Patent Literature- WQ2023006234A1. EP4124383A1.- EP4209265A1.- WO2023 / 177360. - WQ2020209909A1.- WO2023285609A2.- US20230313078A1.- IT201700030574A1- US2023287308A1. - WQ2015110568A1.

Claims

Claims1. A microcapsule for consumer products, which comprises: a) a hydrophobic benefit agent, optionally solubilized or dispersed in a suitable organic solvent, and b) a wall encapsulating the hydrophobic benefit agent; wherein: the wall is a polyurethane polymeric wall which comprises: a moiety derived from a polyfunctional isocyanate crosslinked to a moiety derived from a biobased polyphenol; the polyfunctional isocyanate has at least two isocyanates functional groups; the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC); the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); the amount of biobased polyphenol in the polymeric wall is from 15 to 75% by weight based on elemental analysis of the wall; and the hydrophobic benefit agent / polymer weight ratio (F / P) is from 15 to 120; with the proviso that when the polymer comprises a moiety from a lignin, then the hydrophobic benefit agent / polymer ratio (F / P) is from 30 to 120.

2. The microcapsule according to claim 1, which is free of any other substance acting as emulsifying agent.

3. The microcapsule according to any of the claims 1-2, wherein the polyphenol is a tannin.

4. The microcapsule according to claim 3, wherein the tannin is selected from the group consisting of tannic acid, a gallotannin, an ellagitannin, and a mixture thereof.

5. The microcapsule according to any of the claims 1-4, wherein the polyfunctional isocyanate is selected from an aromatic polyisocyanate, a modified polyisocyanate, and a mixture thereof.

6. The microcapsule according to claim 5, wherein the polyfunctional isocyanate group is selected from xylene di-isocyanate, and a mixture of xylene di-isocyanate with trimethylol propane.

7. The microcapsule according to any of the claims 1-6, wherein the active material comprises a fragrance, flavour, agricultural active, pesticide, insecticide, herbicide, fungicide, pharmaceutical active, nutraceutical active, animal nutrition active, food active, microbial active, malodour counteractant, cosmetic active, UV protection agent, fabric softener active, hard surface cleaning active, skin or hair conditioning agent, flame retardant, dyestuff, antistatic agent, chelating, disinfecting agent, and / or natural active.

8. The microcapsule according to claim 7, wherein the active material comprises a fragrance.

9. The microcapsule according to any of the claims 1-8, obtainable by a process which comprises: a1) providing an organic phase comprising a hydrophobic benefit agent in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanate functional group, on a polyfunctional isocyanate-to-oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10; wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography (SEC); a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to-aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained;a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature, wherein warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C; or, alternatively, obtainable by a process which comprises: b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in a hydrophobic benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to-solution weight ratio of from 0.15 to 4.5; wherein the polyfunctional isocyanate has at least two isocyanate functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by size exclusion chromatography; b2) providing an aqueous solution of an emulsifier in a concentration 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to-aqueous weight ratio from 0.3 to 0.9 and shearing the mixture until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature, wherein warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C.

10. A process for the preparation of the microcapsules as defined in any of the claims 1-9, which comprises: a1) providing an organic phase comprising hydrophobic benefit agent in the form of an oil, and a polyfunctional isocyanate, wherein the polyfunctional isocyanate has at least two isocyanates functional groups, on a polyfunctional isocyanate-to-oil weight ratio of from 0.1 / 99.9 to 5 / 95; a2) providing an aqueous solution of a biobased polyphenol at a pH value of from 2 to 10; wherein the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight average molecular weight from 1000 to 10000 g / mol measured by measured by size exclusion chromatography; a3) preparing an oil-in water emulsion by combining the organic and the aqueous phase in an organic-to-aqueous weight ratio of from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; a4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsule to form; a5) optionally, adding a stabilizer to the microcapsule slurry; a6) cooling down; a 7) optionally, isolating the microcapsules and drying them; wherein steps a5) and a6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature wherein warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C; or, alternatively, a process which comprises: b1) preparing an organic phase by first combining a solution of the biobased polyphenol in a suitable organic solvent, with a hydrophobic benefit agent in a hydrophobic benefit agent-to-solution weight ratio of from 1 to 1000, and then adding a polyfunctional isocyanate in a polyfunctional isocyanate-to-solution weight ratio of from 0.15 to 4.5; wherein the polyfunctional isocyanate has at least two isocyanate functional groups, and the biobased polyphenol is selected from the group consisting of a tannin, a lignin, and a mixture thereof; the tannin has a weight average molecular weight from 330 to 4000 g / mol measured by Gel Permeation Chromatography (GPC), the lignin has a weight averagemolecular weight from 1000 to 10000 g / mol measured by measured by size exclusion chromatography; b2) providing an aqueous solution of an emulsifier in a concentration 0.1 to 15% by weight; b3) combining the organic and the aqueous phase in a specific organic-to-aqueous weight ratio from 0.3 to 0.9 and shearing them until droplets of the desired droplet size are obtained; b4) heating the emulsion and keeping at a given temperature for a given amount of time for the microcapsules to form; b5) optionally, adding a stabilizer to the microcapsule slurry; b6) cooling down; and b7) optionally, isolating the microcapsules and drying them; wherein steps b5) and b6) can be carried out in any order; and when the stabilizer is added, it is added either to the warm slurry or once the slurry is at room temperature, wherein warm means a temperature from 35 to 70 °C and room temperature means a temperature between 20 to 25°C.

11. Use of the microcapsule according to any of the claims 1-9, as delivery systems for delivering a hydrophobic benefit agent.

12. A microcapsule slurry comprising a plurality of the microcapsules as defined in any of the claims 1-9, dispersed in an aqueous phase.

13. The microcapsule slurry according to claim 12, wherein the microcapsules have a particle size distribution from 1 to 100 pm quoted as the median volume-based diameter Dv[50] measured with dynamic light scattering using a Malvern Master sizer 3000 (DLS).

14. A composition comprising either microcapsules as defined in any of the claims 1-9 or a slurry as defined in any of the claim 12-13, together with appropriate excipients and / or carriers, wherein the appropriate excipients and / or carriers are cosmetically acceptable excipients or carriers, dermatological acceptable excipients or carriers, dietetically acceptable excipients or carriers, or edible excipients or carriers.

15. A consumer product for controlled release of the hydrophobic benefit agent comprising either the microcapsules as defined in any of the claims 1-9, the microcapsule slurry as defined in any of the claims 12-13, or the composition as defined in claim 14.

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