Silicone Elastomer Particle Antioxidant Dispersion Odor Control
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Solution Overview
Problem
Silicone elastomer particles used in cosmetics often cause odor due to oxygenation of nonionic surfactants by platinum group metal catalysts, and compounds that reduce catalyst activity can irritate the skin, making them unsuitable for long-term skin contact cosmetics.
Innovation Solution
Incorporating an antioxidant into the silicone elastomer particles to prevent oxygenation of nonionic surfactants, ensuring the antioxidant remains within the particles and not in the water phase, thereby maintaining its effectiveness and avoiding skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a compound that decreases catalyst activity of platinum group catalyst is added, then odor generation is prevented, but skin irritation occurs
Solution Approach 1:
The patent introduces an intermediary substance (antioxidant) that indirectly prevents odor by scavenging oxygen and preventing oxidation of the nonionic surfactant, rather than directly inhibiting the platinum catalyst. This mediator approach prevents the harmful interaction between catalyst inhibitor and skin while achieving the desired odor prevention effect
Solution Approach 2:
The patent replaces the chemical mechanism of catalyst inhibition with a different chemical mechanism (antioxidation). Instead of using compounds that chemically interact with and inhibit the platinum catalyst, the patent uses antioxidants that work through a different pathway (preventing oxidation) to achieve the same end result of odor prevention without skin irritation
2Ease of manufacture
If nonionic surfactant is used for emulsification, then particle formation is achieved, but oxygenation occurs over time causing odor
Solution Approach 1:
The patent applies preliminary action by incorporating the antioxidant into the silicone elastomer particle structure before the product is used. This pre-positioning of the antioxidant ensures it is already in place to prevent oxidation of the nonionic surfactant, providing long-term odor prevention without requiring additional measures during storage or use
Solution Approach 2:
The antioxidant serves as an intermediary that protects the nonionic surfactant from oxidation. By positioning the antioxidant within the particle structure, it acts as a protective mediator between the surfactant and oxygen, preventing the harmful oxidation reaction that would otherwise occur over time
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 antioxidant effectively prevents odor generation over time in cosmetics, making the silicone elastomer particles suitable for use in cosmetics without causing skin irritation.
Implementation Method 1
the polyether moiety of the nonionic surfactant is oxygenated by an effect of the platinum group metal catalyst to cause odor
Data Source
AI summary
One of the purposes of the present invention is to provide a silicone elastomer particle and an aqueous dispersion of the silicone elastomer particles, which prevent generation of odor from oxygenation of nonionic surfactants. The present invention provides a silicone elastomer particle having a crosslinking structure formed by an addition reaction of a monovalent aliphatic unsaturated group bonded to a silicon atom and a hydrogen atom bonded to another silicon atom, wherein the silicone elastomer particle contains an antioxidant. Further, present invention provides an aqueous dispersion comprising the silicone elastomer particles, a nonionic surfactant and water.