Modified Clay Using Phospholipids for Cosmetic Formulations
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Solution Overview
Problem
There is a challenge in replacing synthetic quaternary ammonium compounds used in modified clays with naturally sourced compounds while maintaining the desirable modification of clay, particularly in cosmetics where skin irritation is a concern.
Innovation Solution
The use of phospholipids to treat swellable clay in an organophylization process, resulting in a modified clay with a weight ratio of phospholipid to swellable clay between 0.30 to 1.20, and containing less than 20 cmol/kg of cations excluding sodium cations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic quaternary ammonium compounds are used to modify clay, then the clay achieves desired lipophilic modification and viscosity properties, but skin irritation and environmental harm increase
Solution Approach 1:
The invention changes the chemical composition parameter by replacing synthetic quaternary ammonium compounds with phospholipids having specific fatty acid compositions (rich in omega-3 and omega-6 fatty acids). This parameter change maintains the lipophilic modification effectiveness while eliminating skin irritation and environmental harm associated with synthetic compounds.
Solution Approach 2:
The invention uses naturally occurring phospholipids from vegetable oils as a renewable, biodegradable alternative to persistent synthetic quaternary ammonium compounds. These natural phospholipids provide the necessary modification functionality while being environmentally friendly and safe for skin contact.
2Object-affected harmful factors
If naturally sourced compounds are used to replace synthetic quaternary ammonium, then environmental friendliness and skin safety improve, but maintaining desirable clay modification becomes challenging
Solution Approach 1:
The invention optimizes parameters including the weight ratio of phospholipid to clay (0.2 to 2.0, preferably 0.4 to 1.0), the selection of phospholipids with specific fatty acid profiles, and processing conditions (temperature, mixing time). These parameter optimizations ensure that natural phospholipids achieve the same intercalation and modification effectiveness as synthetic compounds.
Solution Approach 2:
The invention creates a composite modified clay consisting of clay minerals intercalated with natural phospholipid molecules. This composite structure combines the layered silicate framework of clay with the amphiphilic properties of phospholipids, achieving both environmental friendliness and effective modification for cosmetic applications.
3Reliability
If phospholipid to clay weight ratio is increased to improve modification, then swelling index and viscosity improve, but production cost increases
Solution Approach 1:
The invention identifies an optimal weight ratio range of phospholipid to clay (0.2 to 2.0, preferably 0.4 to 1.0) that achieves the desired swelling index and viscosity properties. Within this optimized range, the formulation achieves maximum effectiveness at minimum cost, avoiding both under-modification and excessive material usage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the production of modified clays with desired viscosity, swelling index, and environmental credentials, while reducing skin irritation and chemical waste, making them suitable for use in cosmetic formulations.
Implementation Method 1
the treatment of clay with a phospholipid, wherein the clay comprises swellable clay
Implementation Method 2
Known modified clays, also frequently referred to as organoclays, are often produced via an organophylization process
Implementation Method 3
wherein the clay comprises a swellable clay
Data Source
AI summary
The present invention relates to a modified clay comprising a clay and a phospholipid, a method of preparing such modified clays, their use, and cosmetic formulations comprising said modified clay.