AU2021105956A4 - Nappy Cream - Google Patents

Abstract

A nappy cream formulation includes the following active ingredients: • Purified water with approximately 0.5% by weight Aloe Barbadensis Leaf Powder, together comprising 60% to 90% by weight of the formulation; • Shea Butter, comprising 1% to 5% by weight of the formulation; • Jojoba Oil, comprising 1% to 5% by weight of the formulation; • Green Tea Extract, comprising 0.05% to 1% by weight of the formulation; • Kakadu Plum Extract, comprising 0.05% to 1% by weight of the formulation; and • Zinc Oxide BP, comprising 10% to 15% by weight of the formulation.

Description

NAPPY CREAM FIELD OF THE INVENTION

This invention relates to a nappy cream. It relates particularly but not exclusively to a

protective nappy cream which creates a protective barrier against irritants and can be used to treat minor skin ailments such as burns, cuts, minor wounds, dandruff and eczema.

BACKGROUND TO THE INVENTION

A nappy cream is a topical product used to place a physical barrier between the skin and

contaminants that may irritate the skin. Although the most obvious use of a nappy cream is in treating nappy rash, nappy cream is also useful for athletes who suffer from chafing,

people who suffer from bedsores, and people who are suffering dry or irritated skin.

Many nappy creams use dimethicone as a key ingredient. Dimethicone is silicon-based and

gives the cream a smooth, silky texture. However, it is often said thatdimethicone exacerbates acne by forming a barrier over skin, which traps not just moisture, but also

bacteria, skin oils, sebum, and other impurities.

SUMMARY OF THE INVENTION

According to the present invention there is provided a nappy cream formulation including the following active ingredients:

• Purified water with approximately 0.5% by weight Aloe Barbadensis Leaf Powder,

together comprising 60% to 90% by weight of the formulation;

• Shea Butter, comprising 1% to 5% by weight of the formulation;

• Jojoba Oil, comprising 1% to 5% by weight of the formulation;

• Green Tea Extract, comprising 0.05% to 1% by weight of the formulation;

• Kakadu Plum Extract, comprising 0.05% to 1% by weight of the formulation; and

• Zinc Oxide BP, comprising 10% to 15% by weight of the formulation.

The nappy cream formulation may include any suitable thickeners, emulsifiers, preservatives, humectants, colourants, fragrances, antioxidants and pH adjusters. Suitable

additional ingredients which fulfil these functions are:

• Xanthan Gum, comprising 0.1% to 1% by weight of the formulation;

• Glycerine, comprising 1% to 5% by weight of the formulation;

• Cetyl Alcohol, comprising 1% to 5% by weight of the formulation;

• Cetyl Stearyl Alcohol, comprising 0.5% to 5% by weight of the formulation;

• Caprylic/Capric Triglyceride, comprising 5% to 10% by weight of the formulation;

• Benzyl Alcohol, comprising 0.1% to 1% by weight of the formulation;

• Microcare PHG, comprising 0.2% to 2% by weight of the formulation;

• Polawax NF, comprising 1% to 5% by weight of the formulation;

• SEOC Relax Me Blend, comprising 0.1% to 5% by weight of the formulation; and

• Lactic Acid, comprising 0.05% to 1% by weight of the formulation.

A method of manufacturing a nappy cream formulation according to the invention includes

the following steps:

a) Combine the purified water including Aloe Barbadensis Leaf Powder with the

glycerine and heat to 65-70°C. Sift in the Xanthan gum and mix under high shear

until fully hydrated. b) Combine the Cetyl Alcohol, Cetyl Stearyl Alcohol, Caprylic/Capric Triglyceride, Benzyl

Alcohol, Shea Butter, Jojoba Oil, Microcare PHG, and Polawax NF, and heat to 70°C. c) Combine the Green Tea Extract, Kakadu Plum Extract, SEOC Relax Me Blend, and Zinc Oxide BP.

d) Add the mixture of step (b) to the mixture of step (a) and emulsify. Stir while cooling. e) When cooled below 30°C, add the mixture of step (c). Stir until mixed thoroughly.

f) Add the Lactic Acid and continue stirring until mixed thoroughly.

g) Check and adjust the pH to the final required setting 6.0-6.5.

The invention will now be described in more detail with reference to a particular embodiment. It is to be understood that the specific details of the embodiment do not

supersede the generality of the foregoing description.

DETAILED DESCRIPTION OF AN EXAMPLE EMBODIMENT

The example embodiment of a nappy cream formulation according to the present invention

includes the following ingredients:

Phase A ingredients:

• Purified water with approximately 0.5% by weight Aloe Barbadensis Leaf Powder,

together comprising 60% to 90% by weight of the formulation;

• Xanthan Gum, comprising 0.1% to 1% by weight of the formulation; and

• Glycerine, comprising 1% to 5% by weight of the formulation.

Phase B ingredients:

• Cetyl Alcohol, comprising 1% to 5% by weight of the formulation;

• Cetyl Stearyl Alcohol, comprising 0.5% to 5% by weight of the formulation;

• Caprylic/Capric Triglyceride, comprising 5% to 10% by weight of the formulation;

• Benzyl Alcohol, comprising 0.1% to 1% by weight of the formulation;

• Shea Butter, comprising 1% to 5% by weight of the formulation;

• Jojoba Oil, comprising 1% to 5% by weight of the formulation;

• Microcare PHG, comprising 0.2% to 2% by weight of the formulation; and

• Polawax NF, comprising 1% to 5% by weight of the formulation.

Phase C ingredients:

• Green Tea Extract, comprising 0.05% to 1% by weight of the formulation;

• Kakadu Plum Extract, comprising 0.05% to 1% by weight of the formulation;

• SEOC Relax Me Blend, comprising 0.1% to 5% by weight of the formulation; and

• Zinc Oxide BP, comprising 10% to 15% by weight of the formulation.

Phase D ingredient:

• Lactic Acid, comprising 0.05% to 1% by weight of the formulation.

The formulation is created by the following steps:

1. Combine the Purified water including Aloe Barbadensis Leaf Powder with the Glycerine and heat to 65-70°C. Sift in the Xanthan Gum and mix under high shear

until fully hydrated. 2. Combine ingredients in Phase B and heat to 70°C.

3. Add Phase B to Phase A and emulsify. Stir while cooling. 4. When cooled below 30°C, add pre-combined ingredients from Phase C. Stir until

mixed thoroughly. 5. Add Phase D ingredient and continue stirring until mixed thoroughly.

6. Check and adjust the pH to the final required setting 6.0-6.5.

This results in a viscous liquid, with a density of approximately 1.

The pH of cosmetic products should remain in a certain range so that the colour, viscosity, skin feel, and physicochemical stability remains intact during its shelf-life and during its

application by the consumer.

The pH scale ranges from 0 to 14, where a pH of 7 is neutral, while a pH less than 7 is acidic and a pH greater than 7 is basic or alkaline. The skin's normal pH is slightly acidic.

If the skin pH is too acidic (less than 5.5) it can become irritated, red, inflamed, and even painful to touch. If the skin pH is too alkaline (greater than 5.5), it can become dry,

sensitive, and the person may even develop eczema. Newborns have relatively high pH levels all over the skin. As babies get older, their pH levels decline. The average newborn has

a skin pH of about 7. This is compared to the average adult skin pH of 5.7.

It is therefore advisable when formulating washes, lotions, and creams to reach a pH between 5-7 and the general rule is that slightly acidic products are preferred and perform

better for children.

Once the formulation process has been completed it is time to measure the pH of the product, where one of these 3 possibilities can occur:

1. The pH of the product is exactly in the desired range and in the range where the

preservative system has the highest efficiency. This is unfortunately rare, and in most cases, it will be necessary either to reduce or increase the pH, dependent on the product being

formulated.

2. If the pH of the product is higher than the desired range, it needs to be reduced. Citric acid, and lactic acid are the most suitable acids to reduce the pH of a cosmetic

product.

3. If the product pH is lower than the desired range it can be increased with Sodium Citrate.

The particular ingredients and the reasons for their selection will now be described in

further detail.

Purified Water: Purified water (CAS number 7732-18-5) is combined with about 0.5% by

weight of Aloe Barbadensis Leaf Powder (CAS number 85507-69-3 / 94349-62-9). As a

cosmetic ingredient, aloe vera is widely used in many mainstream skincare and cosmetics products. The plant is skin-friendly and has a low risk of causing allergies, sensitivity or skin

reactions, and it is also versatile. It also aids protection of the epidermis and the skin's ability to restore itself and commonly used in after-sun products, facial, hair and body care.

From the juice of Aloe Vera leaves this ingredient adds a calming effect to the skin. It is known for soothing irritation and itching as well as being lightly moisturising.

Xanthan Gum (CAS number 11138-66-2): This is used in a variety of cosmetics and personal care products to help improve binding, emulsification, and thickening of the product.

Naturally plant derived and safe to use in skincare, the most effective way to disperse this gum is to blend into Glycerin to make a paste that can easily be mixed into the formulation.

Glycerine (Glycerin CAS number 56-81-5): This is used to provide smoothness and

lubrication. It is also a well-known humectant that prevents the loss of moisture from products so they don't dry out as quickly.

Cetyl Alcohol (CAS number 36653-82-4): This helps to create smoother creams, thicker

lotions, and more stable foam products. It is used to soften the skin/hair as an emollient. It is considered an effective ingredient for soothing and healing dry skin.

CSA (Cetyl Stearyl Alcohol) (CAS number 67762-27-0 / 8005-44-5): This is an emulsifier

which helps prevent creams from separating into oil and liquid. As an emollient, cetyl alcohol has the ability to soften and smooth flakiness on the skin, which helps to reduce

rough, dry skin.

GTCC (Caprylic/Capric Triglyceride) (CAS number 73398-61-5): Fractionated coconut oil of Caprylic/Capric Triglyceride is a light colourless carrier oil which will not stain clothing, is

odorless and has a long shelf life and stability, acting as an emollient, lubricant and solvent.

Butyrospermum Parkii (Shea) Butter (CAS number 194043-92-0): This has good emolliency and moisturising properties and is a skin conditioning and viscosity increasing agent.

Simmondsia Chinensis (Jojoba) Seed Oil (CAS number 90045-98-0): This is a carrier oil that

acts as a moisturizer and emollient, prevents transdermal water loss and retains moisture. It has good lubricant properties without leaving a greasy film on the skin as it penetrates.

Microcare PHG: This is composed of approximately 65% Phenoxyethanol (CAS number 122

99-6 ), and 35% Caprylyl Glycol (CAS number 1117-86-8). As a paraben and formaldehyde free preservative system, the combination of these ingredients provides optimized protection against microbial growth from both bacteria and yeast while imparting a pleasant

feel to the finished product. There are no pH restrictions and it is compatible with most raw materials.

Polawax NF: This is composed of approximately 75% Cetearyl Alcohol (CAS number 67762

27-0 / 8005-44-5) and 25% Polysorbate 60 (CAS number 9005-67-8): It is a vegetable-derived emulsifying wax and stabiliser used in lotions and creams to give them a smooth consistency

and help keep them from separating.

Kakadu Plum Extract: This is composed of approximately 19% purified water (CAS number 7732-18-5), 70% Glycerin (CAS number 56-81-5), 10% Terminalia Ferdinandiana Fruit Extract

(CAS number 1176234-54-0), and 1% Sodium Benzoate (CAS number 532-32-1). This includes a number of essential nutrients including Vitamin C, and has antiseptic wound

healing properties whilst soothing for hypersensitive skin. It is good for stretch marks, antioxidant, anti-inflammatory and antimicrobial properties, reduces redness, swelling and

skin irritation.

Green Tea Extract: This is composed of approximately 50% Glycerin (CAS number 56-81-5), 33% purified water (CAS number 7732-18-5), 15% Camellia Sinensis Leaf Extract (CAS

number 84650-60-2), and 2% Potassium Sorbate (CAS number 24634-61-5). This extract is an effective antioxidant and UV protectant, and is anti-inflammatory, anticarcinogenic and antimicrobial. It helps to speed up skin exfoliation and aids in skin hydration.

SEOC Relax Me Blend: This is composed of approximately 35% Citrus Nobilis (Mandarin

Orange Peel) Oil (CAS number 8008-31-9), 25% Cedrus Atlantica Bark (Cedarwood) Oil (CAS number 8000-27-9), 20% Lavandula Angustifolia (Lavender) Oil (CAS number 8000-28-0),

% Lavandula Hybrida Oil (CAS number 8022-15-9), 5% Citrus Aurantium Bergamia (Bergamot) Fruit Oil (CAS number 8007-75-8) and 5% Anthemis Nobilis Flower (Roman

chamomile) Oil (CAS number 84649-86-5). Citrus Nobilis (Mandarin Orange Peel) Oil has significant antioxidant properties. It is mild and calming, anti-inflammatory, and has

antimicrobial and refreshing properties. Cedrus Atlantica Bark (Cedarwood) Oil is anti inflammatory, antiseptic, and beneficial for muscular aches. It is a scalp tonic suitable for

oily skin and hair treatment such as dandruff and cradle cap. Lavandula Angustifolia

(Lavender) Oil has antiseptic and anti-inflammatory properties and is effective in treating acne, dermatitis and oily skin. It promotes rapid healing and helps reduce scarring.

Lavandula Hybrida Oil is used as a fragrance ingredient in cosmetics. Its sensitiser potential for skin is similar to that of lavender oil and camphor. Citrus Aurantium Bergamia (Bergamot) Fruit Oil has antibacterial, deodorising, refreshing, soothing, and uplifting

properties which make it suitable for body skincare preparations. Anthemis Nobilis Flower (Roman chamomile) Oil is used to help calm inflamed skin and ease skin conditions like

eczema or rashes.

Zinc Oxide (CAS number 1314-13-2): Known as a topical protectant, zinc oxide provides astringent, antiseptic and skin regenerating properties. It is used to treat minor skin

ailments such as burns, cuts, minor wounds, dandruff and eczema and can help with irritating symptoms such as itching, redness, peeling skin and inflammation. Zinc Oxide BP is

Zinc Oxide manufactured according to the British Pharmacopeia specifications.

Lactic Acid (CAS number 124-68-5), approximately 88% combined with purified water (CAS number 7732-18-5), approximately 12%: Often used as a natural pH adjuster in

formulations, lactic acid is produced by the fermentation of carbohydrates. Lactic acid

protects the skin against external influences like bacteria, allergens and pollution, while maintaining moisture.

A nappy cream formulation of the type provided by the present invention is designed to create a protective barrier against everyday irritants, as well as to treat redness and soothe

and nourish delicate skin. Zinc oxide is an active ingredient in this formulation. Known as a topical protectant, zinc oxide works by providing astringent, antiseptic and skin regenerating

properties. It is used to treat minor skin ailments such as burns, cuts, minor wounds, dandruff and eczema and can help with irritating symptoms such as itching, redness, peeling

skin and inflammation, all of which are symptoms used to describe nappy rash.

Claims (3)

1. A nappy cream formulation including the following active ingredients:

• Purified water with approximately 0.5% by weight Aloe Barbadensis Leaf Powder,

together comprising 60% to 90% by weight of the formulation;

• Shea Butter, comprising 1% to 5% by weight of the formulation;

• Jojoba Oil, comprising 1% to 5% by weight of the formulation;

• Green Tea Extract, comprising 0.05% to 1% by weight of the formulation;

• Kakadu Plum Extract, comprising 0.05% to 1% by weight of the formulation; and

• Zinc Oxide BP, comprising 10% to 15% by weight of the formulation.

2. A nappy cream formulation according to claim 1 including the following additional ingredients:

• Xanthan Gum, comprising 0.1% to 1% by weight of the formulation;

• Glycerine, comprising 1% to 5% by weight of the formulation;

• Cetyl Alcohol, comprising 1% to 5% by weight of the formulation;

• Cetyl Stearyl Alcohol, comprising 0.5% to 5% by weight of the formulation;

• Caprylic/Capric Triglyceride, comprising 5% to 10% by weight of the formulation;

• Benzyl Alcohol, comprising 0.1% to 1% by weight of the formulation;

• Microcare PHG, comprising 0.2% to 2% by weight of the formulation;

• Polawax NF, comprising 1% to 5% by weight of the formulation;

• SEOC Relax Me Blend, comprising 0.1% to 5% by weight of the formulation; and

• Lactic Acid, comprising 0.05% to 1% by weight of the formulation.

3. A method of manufacturing a nappy cream formulation according to claim 2

including the following steps:

a) Combine the Purified water including Aloe Barbadensis Leaf Powder with the Glycerine and heat to 65-70°C. Sift in the Xanthan Gum and mix under high shear

until fully hydrated.

b) Combine the Cetyl Alcohol, Cetyl Stearyl Alcohol, Caprylic/Capric Triglyceride, Benzyl Alcohol, Shea Butter, Jojoba Oil, Microcare PHG, and Polawax NF, and heat to 70°C.

c) Combine the Green Tea Extract, Kakadu Plum Extract, SEOC Relax Me Blend, and Zinc Oxide BP.

d) Add the mixture of step (b) to the mixture of step (a) and emulsify. Stir while cooling. e) When cooled below 30°C, add the mixture of step (c). Stir until mixed thoroughly.

f) Add the Lactic Acid and continue stirring until mixed thoroughly. g) Check and adjust the pH to the final required setting 6.0-6.5.