Cold-process method of manufacturing for sunscreen lotions and creams

Abstract

An innovative cold-process manufacturing for lotion with sunscreen properties including a aqueous phase, a liquid SPF-tunable cold-processable UV filter, a liquid cold-processable emulsifier, and a liquid cold-processable rheology modifier that are creating a pleasant and stable emulsion.

Description

[0001] Attorney Docket No. 030146.00072

[0002] COLD-PROCESS METHOD OF MANUFACTURING FOR SUNSCREEN LOTIONS AND CREAMS

[0003] CROSS-REFERENCE PARAGRAPH

[0004] This application is a PCT Application, which claims priority under 35 U.S.C. § 119 to U.S. Provisional Patent Application No. 63 / 697,608, filed September 23, 2024, the contents of which are incorporated by reference herein in its entirety.

[0005] FIELD

[0006] Novel processes for sunscreen manufacturing, employing very low or no thermal energy to obtain a stable, pleasant oil in water emulsion with SPF properties, are disclosed.

[0007] BACKGROUND

[0008] Sunscreen cream and lotion formulations are typically o / w emulsions, where the oil phase acts not only as an emollient, such as in classic cream and lotions, but also as the main solvent used to dissolve organic filter active ingredients (UVA / UVB filters). Those organic filters have known different solubility properties and typically require considerable thermal energy in order to be dispersed and dissolved in the oil phase. This physical property precludes any so called “coldprocessing” method to produce a sunscreen lotion with organic UV filters, which impacts energy cost, time in manufacturing, and the “green” environmental footprint.

[0009] The common industrial process to manufacture a sunscreen lotion or cream involves the preparation of an oil phase containing the “solvent” to dissolve the organic active filters (UVA and UVB). The solvent needs to be heated up to 80-90°C to solubilize the filters. This step requires a high amount of energy to just dissolve the filters. Unfortunately, those temperatures are often also too high to incorporate other ingredients, so the reactors involved need to first be cooled to add them. This process thus involves more energy and time.

[0010] The addition of solid fats or waxes to increase the body of the lotion / cream also requires heat to melt those components. When this step is done in the same vessel where the active filters have been dissolved, the mass increases as does the quantity of heat to dissolve all the ingredients.

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[0013] Currently, the only cold process technically possible, is one employing inorganic UV filters (zinc and titanium oxides). These types of filters limit overall outcome regarding sensorial preferences in sunscreens (for example, whitening, stickiness, poor spreadability).

[0014] Accordingly, additional cold processing methods and sunscreen mixtures having preferred sensorial attributes are needed.

[0015] SUMMARY

[0016] The following presents a simplified summary in order to provide a basic understanding of some aspects of the embodiments described herein. This summary is not an extensive overview of these embodiments. It is not intended to identify key or critical elements of these embodiments or to delineate the scope of the embodiments; its sole purpose is to present concepts in a simplified form as a prelude to the more detailed description that is subsequently presented.

[0017] Described herein are compositions, methods and systems relating to sunscreen mixtures. In one exemplary embodiment, the methods des cribbed herein allow for the formulation of a cold process SPF sunscreen lotion with the following ingredients and / or features:

[0018] 1) The use of a highly concentrated liquid organic UVA / UVB filter blend. This feature is necessary to have a SPF-tunable ingredient for sunscreen formulation. This novel ingredient, commercially available from 3V SIGMA USA INC. named “UVASORB COMPLETE,” allows for the incorporation of all the necessary UVA-UVB filters in a liquid form that requires negligible to practically no heat to be processed.

[0019] 2) The use of a highly efficient liquid emulsifier system that allows for the emulsification of the oil phase in the aqueous phase in an elegant and homogenous way. This ingredient, including for example one commercially available from 3V SIGMA USA INC. named “EMULSIDERM MPN,” (INCI: Polyglyceryl-6 Laurate (and) Caprylic / Capric Trglyceride (and) Olive Oil Polyglyceryl-6 Esters (and) Lecithin) is 100% natural, liquid and cold-processable and will work as the primary / sole emulsifier.

[0020] 3) The use of a liquid and performing rheology stabilizer to increase viscosity, creating a structured network, and blocking the free water to stabilize the emulsion. This ingredient, including for example one commercially available from 3 V SIGMA USA INC. named “RAPIDGEL® EZ2,” (INCI: Dicaprylyl Ether, Acrylates / Vinyl Isodecanoate

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[0023] Crosspolymer, Aminomethyl Propanol) acts as the main rheology modifier, co-emulsifying system, and stabilizer. The liquid form allows it to be easily used in cold processing as well hot traditional processing.

[0024] Other features and their advantages will be readily apparent to those skilled in the arts, techniques and equipment

[0025] DETAILED DESCRIPTION

[0026] Embodiments described herein can be understood more readily by reference to the following detailed description, examples, and claims. Elements, components and methods described herein, however, are not limited to the specific embodiments presented in the detailed description, examples, and claims. In particular, these embodiments are merely illustrative of the principles of the described herein. Accordingly, this disclosure is not intended to embrace all such alternatives, modifications and variations that fall within the spirit and broad scope of the specification and in view of the claims.

[0027] All publications, patents and patent applications mentioned in this specification are incorporated herein in their entirety by reference, to the same extent as if each individual publication, patent, or patent application was specifically and individually indicated to be incorporated herein by reference. In addition, citation or identification of any reference in this application shall not be construed as an admission that such reference is available as prior art. To the extent that section headings are used, they should not be construed as necessarily limiting.

[0028] In addition, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a stated range of “1.0 to 10.0” should be considered to include any and all subranges beginning with a minimum value of 1.0 or more and ending with a maximum value of 10.0 or less, e.g., 1.0 to 5.3, or 4.7 to 10.0, or 3.6 to 7.9. All ranges disclosed herein are also to be considered to include the endpoints of the range, unless expressly stated otherwise. For example, a range of “between 5 and 10,” from 5 to 10,” or “5-10” should generally be considered to include the endpoints 5 and 10. Unless otherwise stated, all ranges are by volume.

[0029] Further, when the phrase “up to” is used in connection with an amount or quantity, it is to be understood that the amount is at least a detectable amount or quantity. For example a material

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[0031] 204361656. vl Attorney Docket No. 030146.00072 present in an amount “up to” a specified amount can be present from a detectable amount and up to and including the specified amount.

[0032] Additionally, in any disclosed embodiment, the terms “substantially,” “approximately,” and “about” may be substituted with “within [a percentage] of’ what is specified, where the percentage includes 0.1, 1, 5, and 10 percent.

[0033] It is also to be understood that the article “a” or “an” refers to “at least one,” unless the context of a particular use requires otherwise.

[0034] As used herein, UVAsorb HEB, also known as Iscotrizinol or Diethylhexyl Butamido Triazone, is a UVB sunscreen agent that is also effective against some UVA rays. It is an oilsoluble chemical sunscreen. The chemical formula for Iscotrizinol is shown below:

[0035] As used herein, the term “UVASORB COMPLETE” refers to a mixture having the following components:

[0036] 1) A highly efficient UVB filter (Uvasorb HEB, also known as diethylhexyl butamido triazone (DEBT) or Iscotrizinol);

[0037] 2) A UVA filter (for example, DHHB, Diethylamino hydroxybenzoyl hexyl benzoate);

[0038] 3) A UVA-UVB gap filter (for example, Bemotrizinol, also known as Tinosorb S or Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine); and / or

[0039] 4) A vehicle (for example, ethylhexyl pelargonate or neopentyl glycol diheptanoate).

[0040] In some embodiments, the methods involve adding a suitable amount of RAPIDGEL®

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[0043] EZ2 to structure and stabilize an o / w lotion without using any heating step, where the lotion (or cream) has desired properties.

[0044] One benefit of using RAPIDGEL® EZ2 is that, in addition to it being a liquid rheology modifier, it is also compatible with both UVASORB COMPLETE and EMULSIDERM MPN, which are also compatible with each other. Although higher or lower amounts can be used, a typical range is between about 0.5 and about 5%, more typically between about 1 and about 4%, and still more typically between about 1.50 - 3.50 w / w% of RAPIDGEL® EZ2 in a sunscreen formulation. In some embodiments, in addition to or in place of Rapidgel® EZ2, Rapidgel® EZ1 can be used.

[0045] As used herein, RAPIDGEL® EZ2 is a user-friendly, multifunctional liquid polymer with a Natural Origin Index (NOI) of 0.81, calculated to ISO 16128 standards. It effectively stabilizes emulsions while enhancing sensorial qualities. “RAPIDGEL® EZ2” (INCI: Dicaprylyl Ether, Acrylates / Vinyl Isodecanoate Crosspolymer, Aminomethyl Propanol) acts as a rheology modifier, co-emulsifying system, and stabilizer. The liquid form allows it to be easily used in cold processing as well as traditional hot processing.

[0046] In one embodiment, the liquid rheology modifier is RAPIDGEL® EZ2. However, in some embodiments, other rheology modifiers are used, or, in still other embodiments, no rheology modifier is used.

[0047] In some embodiments, the compositions and methods either do not include a rheology modifier, or use rheology modifiers other than RAPIDGEL® EZ2, for example, RAPIDGEL® EZ1 (INCI Name: PEG-6 (and) AMP-Acrylates / Vinyl Isodecanoate Crosspolymer, from 3V SIGMA USA INC ).

[0048] When rheology modifiers are used, if they are solid (i.e., powders), they are generally dispersed in the aqueous phase or, if liquid, also in the oil phase or at the end of emulsifying step.

[0049] When the rheology modifier is a liquid, no heating or specialized dispersing equipment is required, allowing this step to also involve cold processing.

[0050] The exact amount of rheology modifiers needed to be used in sunscreen depends on several factors. Various factors can influence the relative amount of rheology modifier desired for a

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[0052] 204361656. vl Attorney Docket No. 030146.00072 particular product. These include whether the product is intended to be a thin lotion, a thick cream, or a gel.

[0053] The amount of rheology modifier also depends on the formulation type. Oil-in-water emulsions and water-in-oil emulsions can require different types and amounts of rheology modifiers.

[0054] The amount of rheology modifier also depends on the processing method. Some rheology modifiers, such as RAPIDGEL® EZ2, are "cold processable," which can affect formulation ease.

[0055] To achieve a desired viscosity and stability in a sunscreen formulation, it can be important to carefully select an appropriate rheology modifier and determine the optimal concentration through formulation trials and testing, but those of skill in the art, knowing the desired properties of the sunscreen product, can readily determine the appropriate amount of the rheology modifier to use, with no more than routine experimentation.

[0056] Other rheology modifiers that can be used, particularly if a hot processing step is used, include starches (typically used in concentrations between 1% and 4% w / w in emulsions for stability), tara gum (typically in concentrations between 1% w / w and 2% w / w), sclerotium gum (typically in concentrations between 0.3% w / w and 2% w / w) and Hydroxyethyl Cellulose (HEC) (typically in concentrations between 0.1% w / w and 2% w / w)

[0057] In some embodiments, EMULSIDERM MPN (TNCI: Polyglyceiyl-6 Laurate (and) Caprylic / Capric Trglyceride (and) Olive Oil Polyglyceryl-6 Esters (and) Lecithin) is used as an emulsifier. The amount of EMULSIDERM MPN is typically up to around 5% w / w, more typically between about 0.5 and 5% w / w, and still more typically between around 1 and around 5% w / w.

[0058] The present disclosure is directed to a process for making sunscreen mixtures. A sunscreen lotion is typically an oil in water emulsion (o / w). The lotion is commonly prepared using two vessels: one containing the aqueous phase, the other containing the oil phase and the emulsifiers. Water-soluble ingredients are added and mixed in the aqueous phase while the oil-soluble are added and mixed in the oil phase. Ideally, these two phases are brought to approximately the same temperature before mixing them. One rule of thumb is that they should both be heated to a temperature that is 10°C-20°C higher than the highest melting point component before mixing.

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[0061] Even if using low melting point components, the heating step is typically required to solubilize the organic UV active filters and, depending on the chosen UV filters, may be necessary to reach temperatures as high as 90°C. The necessity of high temperatures for the organic UV filters forces the manufacturing to bring both phases (water and oil) to the same high temperature required to create a stable emulsion and to avoid the re-crystallization of the organic UV filters during the emulsification phase.

[0062] Below are common ingredients and steps for a hot-process (current methods) o / w lotion (necessary for sunscreen lotions / creams): a) A aqueous phase containing all the water-soluble ingredients (typically glycols, glycerin, chelant, etc.). This solution is heated to 70°C - 90°C in the traditional hot-process to have a stable and homogeneous emulsion. Also, rheological stabilizers (carbomers, gums, celluloses, etc.) are dispersed in this phase requiring additional time or specialized equipment to disperse them in a faster and complete way. Aqueous phase represents usually about 50%-70% of the total batch size, so the amount of energy used with the traditional hot-process is consistent in this step. b) An oil phase containing UV fdters (solid, some liquid), other oils, emollients, butters, emulsifying system, other co-emulsifiers. This solution is typically heated to 70°C-90°C in the traditional hot-process to fully solubilize the UV active filters and to have a stable and homogeneous emulsion. Oil phase represents usually about 20%- 40% of the total batch size, so the amount of energy used with the traditional hot-process is consistent in this step. c) The emulsification step, where the two hot phases are mixed vigorously through an emulsification system (such as a high shear device). d) A cooling step where the emulsion is cooled down from the higher temperature required to solubilize the organic UV active filters and traditional emulsifiers, butters, waxes to values where the final and more delicate ingredients can be added (such as fragrances, preservatives, etc.). This step requires energy and time to bring down the entire mass of the batch to the desired temperature. Often this step cannot be accelerated to avoid problems with the structuring of the emulsion. e) A final phase where other ingredients such as preservatives, fragrances and minor ingredients are added.

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[0065] By contrast, in one exemplary embodiment, an o / w lotion includes the ingredients, and the method involves the steps provided below: a) A aqueous phase containing all the water-soluble ingredients (typically glycols, glycerin, chelant, etc.). In this embodiment, a heating step is not required, removing the need for intense energy. b) An oil phase containing UVASORB COMPLETE, other oils, emollients, low melting point butters, EMULSIDERM MPN (INCI: Polyglyceryl-6 Laurate (and) Caprylic / Capric Trglyceride (and) Olive Oil Polyglyceryl-6 Esters (and) Lecithin) as the sole emulsifying system. In this embodiment, a heating step is not required, removing the need for intense energy to solubilize the UV sunscreen fdters. The usage of EMULSIDERM MPN will further simplify the formula since its liquid status creates a pleasant and stable emulsion without use of the heat required for common solid emulsifiers. c) Other emulsifiers can be used that requires some heat, as well as in cases when the formula requires solid butter to be used: such approach typically requires lower temperatures to melt (about 40°C) and not 70°C-90°C required to solubilize the UV filters. The usage of UVASORB COMPLETE and EMULSIDERM MPN will reduce the amount of heat normally necessary by half. d) The emulsification step, where the two cold / hot phases are mixed vigorously through an emulsification system (high shear device). e) No cooling step is necessary (energy / time saving). f) A final phase where other ingredients like preservatives, fragrances and minor ingredients are added. In this step, using a liquid rheology modifier like RAPIDGEL® EZ2, will further reduce the time of manufacturing, adding increased viscosity, locking the emulsion and stabilizing the formula. The associative characteristics of this component increase the viscosity by creating a network with other fats and oils acting also as a secondary emulsifier. Furthermore, the liquid state allows it to be added at the end of the process, removing the need of solid dispersing systems. Its pre-neutralized components remove the necessity of using other neutralizing agents (organic / inorganic bases).

[0066] Other rheology modifiers can be used; if they are solid (powder) they are generally dispersed in the aqueous phase as reported in point a) or, if liquid also in the oil phase or

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[0068] 204361656. vl Attorney Docket No. 030146.00072 at the end of emulsifying step (like the Rapidgel® EZ2). However, unlike Rapidgel® EZ2, most of the commonly used rheology modifiers will require a pH adjustment (use of organic or inorganic neutralizing bases) at the end of the formulation to “activate” the rheology modifier in order to increase the viscosity and create the structuring effect.

[0069] The o / w emulsion created in the way described herein is stable, pleasant on the skin and keeps the organic UV filters in a stable formula. If low-melting point butter or only oils are used there is no need of heat and the emulsion is stable even if mixed with regular impellers. The use of high shear devices to create the emulsion is suggested but is not necessary in most of the applications.

[0070] As used herein, “UVASORB COMPLETE” may include a mixture having the following components:

[0071] 1) A highly efficient UVB filter (Uvasorb HEB);

[0072] 2) A UVA filter (DHHB, Diethylamino hydroxybenzoyl hexyl benzoate);

[0073] 3) A UVA-UVB gap filter (Bemotrizinol); and / or

[0074] 4) A vehicle (ethylhexyl pelargonate or neopentyl glycol diheptanoate, or propylene glycol dicaprylate / dicaprate, or a mixture in any ratio with two or more of these solvents).

[0075] UVASORB COMPLETE carries also an excellent emollient as its vehicle that is responsible for its pleasant sensoriality and that may reduce the necessity of loading other light emollients in the formulation.

[0076] In some embodiments, the amount of UVASORB COMPLETE is up to around 47% w / w, and in other embodiments, up to around 40% w / w.

[0077] Representative preservatives include but are not limited to phenoxyethanol, parabens, and disodium EDTA. These preservatives can help prevent bacterial and fungal growth, extend shelf life, and maintain product stability. The preservatives are typically present in a range of about 0.1 to about 2% w / w.

[0078] Emollients play a role in achieving skin hydration, nourishment, and sensory enhancement, improving the texture and feel of cosmetic products while creating a protective barrier on the skin

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[0080] 204361656. vl Attorney Docket No. 030146.00072 surface. One of the primary functions of emollients is to moisturize and hydrate the skin. They act as occlusive agents, forming a thin film on the skin’s surface that prevents moisture loss through evaporation. Emollients can be derived from various sources, including natural plant oils, seed extracts, animal fats, silicones, esters, and fatty alcohols. Emollients significantly contribute to the texture and spreadability of the formulation, enhancing its application and absorption.

[0081] Emollients are known for their ability to improve the stability and shelf life of skin care products. They act as stabilizers, helping to keep the different ingredients in the product wellincorporated, preventing phase separation and maintaining homogeneity.

[0082] The concentration of emollients can vary, but is typically between about 1 and about 45% w / w of the formulation, such as between about 15 and about 45% w / w of the formulation.

[0083] Butters like shea butter are typically used as moisturizing and emollient ingredients, not as primary sun-blocking agents. While butters may offer some natural sun protection, their SPF values are generally low. The concentration of butters in sunscreen can vary depending on the specific formulation and desired effect, but are typically present in a concentration between about 1 and about 15% w / w.

[0084] Sunscreen products often include, as a fragrance, the scent of cocoa butter, coconut oil and / or jasmine, though other fragrances can be present. The amount of fragrance in sunscreen varies significantly, but is typically in the range of from about 0.3% and about 0.8%.

[0085] As discussed above, fragrances and preservatives are typically added after the emulsion is formed. These components do not need additional solubilizers when added after the emulsification process, because they are already present in the emulsion.

[0086] In some embodiments, these ingredients can disrupt the formation of the emulsion if added before / during the formation of the emulsion itself, since they typically require a solubilizer. So, in some embodiments, these components are added after the emulsion is formed. In another embodiments, to the extent their addition does not adversely affect the formation of the emulsion itself, one or more of these components can be present while the emulsion is formed.

[0087] Where carbomers are used, a neutralization step with organic / inorganic bases is typically required in order for carbomers to swell and creating the structure / network to create the desired rheology. This may be not necessary for gums and cellulose, though it is important to keep the pH in a desired range so as to not irritate the skin to which the compositions are applied.

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[0090] In another embodiment of the method of preparing the composition, the steps may include: providing an aqueous phase containing all water-soluble ingredients, such as aloe, and amino acids, such as 5 -hydroxy-tryptophan and histidine; providing an oil phase containing an amount of UVASORB COMPLETE, oils, an emollients, a low melting point butters, and an amount of EMULSIDERM MPN; heating at about 40°C or below to melt the butters; adding optionally a preservative, a fragrance, or other minor ingredients to form a o / w lotion.

[0091] In some aspects of this embodiment, the aqueous phase, and the oil phase with the emulsifier, are prepared separately, heated separately and then emulsified / mixed together, ideally while they are each at or around the same temperature. The rheology modifier is typically only added at the end if it is a liquid, like RAPIDGEL® EZ1 or EZ2, as there is a potential that a solid rheology modifier will break up the emulsion.

[0092] The present invention will be better understood with reference to the following nonlimiting examples.

[0093] EXAMPLES

[0094] Example#!

[0095] An example of hot process lotion with a calculated SPF50 is reported. Phase A and B are heated to 80°C in order to solubilize the UV active filters and the waxes / builder. In this example, a traditional carbomer (SYNTHALEN M, from 3V SIGMA USA INC.) is used as rheology modifier and stabilizer. As shown, the heating phase (to 80°C) and the cooling phase (to 40°C) are necessary to build the formula.

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[0098] Example#2

[0099] An example of hot process lotion with a calculated SPF30 is reported. Phase A and B are heated to 70°C-75°C in order to solubilize the UV active filters and the waxes / builder. In this example, an efficient liquid rheology modifier (RAPIDGEL® EZ1, from 3V SIGMA USA INC.) is used as rheology modifier and stabilizer. As shown, the heating phase (to 70°-75°C) and the cooling phase (to 40°C) are necessary to build the formula.

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[0102] Exampl e#3

[0103] An example of innovative cold-process lotion with a calculated SPF50 is reported. In this example the use of UVASORB COMPLETE allows the creation of this cold-process sunscreen lotion, keeping the UV fdters soluble and providing an exceptional skin feeling. Furthermore, the liquid cold-processable emulsifier (EMULSIDERM MPN from 3V SIGMA USA INC.) and the liquid cold-processable rheology modifier (RAPIDGEL® EZ2, from 3V SIGMA USA INC.) are creating a pleasant and stable emulsion. The enhanced characteristics of Emulsiderm MPN and Rapidgel® EZ2 are also due to their emollient capabilities. As shown, no heating phase is necessary to build the formula.

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[0106] Example#4

[0107] An example of innovative cold-process lotion with a calculated SPF30 is reported. In this example, the use of UVASORB COMPLETE allows the creation of this cold-process sunscreen lotion, keeping the UV filters soluble and providing an exceptional skin feeling. Furthermore, the liquid cold-processable emulsifier (EMULSIDERM MPN from 3V SIGMA USA INC.) and the liquid cold-processable rheology modifier (RAPIDGEL® EZ2, from 3V SIGMA USA INC.) are creating a pleasant and stable emulsion. The enhanced characteristics of Emulsiderm MPN and Rapidgel® EZ2 are also due to their emollient capabilities. As can be seen, no heating phase is necessary to build the formula.

[0108] Just by changing the amount of UVASORB COMPLETE, it is possible to tune the SPF to a desired one.

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[0111] Those skilled in the relevant arts will appreciate from the foregoing description of preferred embodiments that substitutions and modification can be made without departing from the spirit and scope of the invention that is defined in the appended claims.

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Claims

Attorney Docket No. 030146.00072WHAT IS CLAIMED IS:

1. A manufacturing method for lotion and creams comprising the steps of: forming a aqueous phase containing all water-soluble ingredients; forming an oil phase containing an amount of UVASORB COMPLETE for the desired SPF, oils, emollients, and an amount of EMULSIDERM MPN as sole emulsifier; mixing the aqueous phase and the oil phase; adding an amount of RAPIDGEL® EZ2 as liquid rheology modifier to form a o / w lotion without the use of any heating step; adding fragrance, preservatives.

2. A manufacturing method for lotion and creams comprising the steps of: forming a aqueous phase containing all water-soluble ingredients and a solid rheology modifier like a carbomer or other suitable rheology modifier; forming an oil phase containing an amount of UVASORB COMPLETE, oils, emollients, waxes and a suitable emulsifier system (primary, secondary); bringing the phases at a suitable temperature in order to dissolve fats, waxes, emulsifiers; mixing the aqueous phase and the oil phase; cooling down the lotion / cream; adding fragrance, preservatives, and, optionally, neutralizing the rheology modifier (if necessary) with an organic / inorganic base.

3. A manufacturing method for lotion and creams scaffolds comprising the steps of: adding in order and mixing well between each addition:1) an amount of deionized water up to complete formula to 100% w / w;2) an amount of EMULSIDERM MPN up to about 5.00 % w / w;3) an amount of UVASORB COMPLETE up to about 40.00 % w / w;4) homogenizing the mixture at 3500 rpm for about 3 minutes;5) an amount of RAPIDGEL® EZ2 up to about 5 % w / w.16204361656. vlAttorney Docket No. 030146.000724. A manufacturing method for lotion and creams comprising the steps of providing a aqueous phase containing all water-soluble ingredients; providing an oil phase containing an amount of UVASORB COMPLETE up to the desired SPF value, oils, emollients, low melting point butters, an amount of EMULSIDERM MPN or any other suitable emulsifier system; heating the mixture at a temperature of no higher than 40°C so as to melt the low melting point ingredients; mixing the aqueous phase and the oil phase; adding an amount of rheology modifier to form a w / o lotion.

5. A sunscreen lotion and cream scaffold comprising: an amount of EMULSIDERM MPN, liquid emulsifier, an amount of RAPIDGEL® EZ2, a liquid rheology modifier and an amount of UVASORB COMPLETE a liquid SPF -tunable stable UV filter system that can create a lotion with no thermal energy with organic UV active filters.

6. The sunscreen lotion and cream scaffold of Claim 5, wherein the amount of EMULSIDERM MPN is up to about 5.00 %w / w; the amount of UVASORB COMPLETE up to about 40.00 %w / w; and the amount of RAPIDGEL® EZ2 up to about 5 %w / w.

7. A sunscreen lotion and cream scaffold consisting essentially of an amount of EMULSIDERM MPN, liquid emulsifier, an amount of RAPIDGEL® EZ2, a liquid rheology modifier and an amount of UVASORB COMPLETE a liquid SPF -tunable stable UV filter system that can create a lotion with no thermal energy with organic UV active filters.

8. The sunscreen lotion and cream scaffold of Claim 7, wherein the amount of EMULSIDERM MPN is up to about 5.00 %w / w; the amount of UVASORB COMPLETE up to about 40.00 %w / w; and the amount of RAPIDGEL® EZ2 up to about 5 %w / w.17204361656. vlAttorney Docket No. 030146.000729. A manufacturing method for lotion and creams comprising the steps of forming a aqueous phase containing all water-soluble ingredients; forming an oil phase containing an amount of UVASORB COMPLETE for the desired SPF, oils, emollients, and an amount of EMULSIDERM MPN sufficient to emulsify the aqueous phase and the oil phase; heating the aqueous and oil phases separately, optionally to around the same temperature, mixing the heated aqueous and oil phases; adding an amount of RAPIDGEL® EZ1 or RAPIDGEL® EZ2 as liquid rheology modifier sufficient to form a o / w emulsion; cooling the emulsion; and, optionally, adding one or more fragrances and / or preservatives.

10. The manufacturing method of Claim 9, wherein the amount of UVASORB COMPLETE is up to 47% w / w.

11. The manufacturing method of Claim 9, wherein the amount of UVASORB COMPLETE is up to 40% w / w.

12. The manufacturing method of Claim 9, wherein the amount of RAPIDGEL® EZ2 is between about 0.5 and about 5%.

13. The manufacturing method of Claim 9, wherein the amount of EMULSIDERM MPN is between about 0.5 and 5% w / w.18204361656. vlBox No. Ill Observations where unity of invention is lacking (Continuation of item 3 of first sheet)This International Searching Authority found multiple inventions in this international application, as follows:Group I: Claim 1, directed towards a manufacturing method for lotion and creams comprising the steps of: forming a aqueous phase containing all water-soluble ingredients; forming an oil phase containing an amount of UVASORB COMPLETE for the desired SPF, oils, emollients, and an amount of EMULSIDERM MPN as sole emulsifier; mixing the aqueous phase and the oil phase; adding an amount of RAPIDGEL® EZ2 as liquid rheology modifier to form a o / w lotion without the use of any heating step; adding fragrance, preservatives.Group II: Claim 2, directed towards a manufacturing method for lotion and creams comprising the steps of: forming a aqueous phase containing all water-soluble ingredients and a solid rheology modifier like a carbomer or other suitable rheology modifier; forming an oil phase containing an amount of UVASORB COMPLETE, oils, emollients, waxes and a suitable emulsifier system (primary, secondary); bringing the phases at a suitable temperature in order to dissolve fats, waxes, emulsifiers; mixing the aqueous phase and the oil phase; cooling down the lotion / cream; adding fragrance, preservatives, and, optionally, neutralizing the rheology modifier (if necessary) with an organic / inorganic base.Group III: Claim 3, directed towards a manufacturing method for lotion and creams scaffolds comprising the steps of: adding in order and mixing well between each addition: 1) an amount of deionized water up to complete formula to 100% w / w; 2) an amount of EMULSIDERM MPN up to about 5.00 % w / w; 3) an amount of UVASORB COMPLETE up to about 40.00 % w / w; 4) homogenizing the mixture at 3500 rpm for about 3 minutes; 5) an amount of RAPIDGEL® EZ2 up to about 5 % w / w .Group IV : Claim 4, directed towards a manufacturing method for lotion and creams comprising the steps of: providing a aqueous phase containing all water-soluble ingredients; providing an oil phase containing an amount of UVASORB COMPLETE up to the desired SPF value, oils, emollients, low melting point butters, an amount of EMULSIDERM MPN or any other suitable emulsifier system; heating the mixture at a temperature of no higher than 40°C so as to melt the low melting point ingredients; mixing the aqueous phase and the oil phase; adding an amount of rheology modifier to form a w / o lotion..Group V: Claims 5-8, directed towards a sunscreen lotion and cream scaffold comprising: an amount of EMULSIDERM MPN, liquid emulsifier, an amount of RAPIDGEL® EZ2, a liquid rheology modifier and an amount of UVASORB COMPLETE a liquid SPF-tunable stable UV filter system that can create a lotion with no thermal energy with organic UV active filters.Group VI: Claims 9-13, directed towards a manufacturing method for lotion and creams comprising the steps of: forming a aqueous phase containing all water-soluble ingredients; forming an oil phase containing an amount of UVASORB COMPLETE for the desired SPF, oils, emollients, and an amount of EMULSIDERM MPN sufficient to emulsify the aqueous phase and the oil phase; heating the aqueous and oil phases separately, optionally to around the same temperature, mixing the heated aqueous and oil phases; adding an amount of RAPIDGEL® EZ1 or RAPIDGEL® EZ2 as liquid rheology modifier sufficient to form a o / w emulsion; cooling the emulsion; and, optionally, adding one or more fragrances and / or preservatives.Form PCT / ISA / 210 (continuation of first sheet) (July 2022)

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