Crosslinked Silicone Elastomer Formulation Without Catalysts
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Solution Overview
Problem
Existing personal care compositions containing crosslinked silicone elastomers often use platinum or tin catalysts and include polyether compounds, which can irritate the skin and are not environmentally friendly.
Innovation Solution
A personal care composition is developed using a crosslinked silicone elastomer prepared by reacting α, ω-dihydroxypoly(diorganosiloxane) with organotrialkoxysilane in the presence of a surfactant, without using platinum or tin catalysts and without polyether compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If crosslinked silicone elastomers are prepared using conventional methods with platinum or tin catalysts, then the elastomers provide luxurious sensory benefits, but the catalysts and polyether compounds cause skin irritation and environmental harm
Solution Approach 1:
The patent removes harmful catalysts (platinum, tin) and polyether compounds from the elastomer preparation process. The elastomer is prepared without these harmful substances, extracting them completely from the system while maintaining the desired sensory benefits through alternative preparation methods using safe catalysts or catalyst-free approaches.
Solution Approach 2:
The patent converts the harmful effect of catalysts and polyether compounds into a benefit by demonstrating that their complete removal is achievable while maintaining or even improving product performance. The harmful substances are replaced with safe alternatives that provide equivalent or superior sensory benefits without skin irritation.
2Object-affected harmful factors
If crosslinked silicone elastomers are prepared without catalysts and polyether compounds, then skin safety is improved, but the preparation process becomes more complex
Solution Approach 1:
The elastomer preparation process is designed to be self-sufficient without requiring harmful catalysts or polyether compounds. The system uses alternative mechanisms (such as moisture-curing or enzyme-catalyzed crosslinking) that occur naturally or with minimal intervention, eliminating the need for complex catalyst management and polyether additive formulations.
3Device complexity
If conventional crosslinked silicone elastomers are used, then the formulation is simple, but polyether compounds stabilize the formulation while causing skin irritation
Solution Approach 1:
The patent extracts polyether compounds from the formulation completely, removing the source of skin irritation while maintaining formulation stability through alternative stabilizing mechanisms such as natural emulsifiers, pH control, or physical stabilization methods that do not require polyether additives.
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
The composition provides luxurious sensory benefits such as cushioning, matte appearance, and powdery soft afterfeel while being skin-friendly and environmentally sustainable.
Implementation Method 1
preparing crosslinkable siloxane by reacting (a) α, ω-dihydroxypoly(diorganosiloxane) and (b) organotrialkoxysilane
Implementation Method 2
emulsifying the crosslinkable siloxane in the presence of a surfactant
Implementation Method 3
crosslinking the emulsified siloxane
Data Source
AI summary
The present disclosures are directed to personal care compositions comprising crosslinked silicone elastomer; personal care compositions comprising a crosslinked silicone elastomer powder that is free of surfactant; and personal care compositions that are free of a polyether compound. The present disclosures are further directed to personal care compositions comprising one or more of oils, an aqueous phase, sunscreens, film formers, waxes, emulsifiers, particulates, pigments, dyes, and preservatives.