Soda-Lime-Borosilicate Glass Beads to Reduce Skin Sand Adhesion
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Solution Overview
Problem
Cosmetic products, particularly sunscreens, cause particle adhesion to the skin, especially sand adhesion, which is undesirable due to the increasing awareness of microplastics and stability issues with existing glass beads.
Innovation Solution
Incorporation of sodium hydroxide borosilicate glass beads with specific properties, such as a particle diameter of 5 to 120 µm, hollow structure, and pH of 9 to 10, into cosmetic preparations to reduce particle adhesion without using solid plastic particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If room-temperature solid plastic particles are used to reduce particle adhesion, then sand adhesion is reduced, but environmental harm increases due to microplastics
Solution Approach 1:
The patent changes the material composition parameter from plastic particles to glass beads made of sodium hydroxide borosilicate. This parameter change maintains the physical function of reducing sand adhesion while eliminating the harmful environmental effects associated with microplastics, as glass beads are biodegradable and do not persist in the environment.
Solution Approach 2:
The patent employs glass beads that can be easily removed from the skin through rinsing, unlike plastic particles that persist. The glass beads serve their temporary function of reducing adhesion and then disappear without environmental harm, aligning with the principle of using disposable-like materials that do not accumulate in the environment.
2Object-affected harmful factors
If conventional glass beads are used to reduce stickiness, then particle adhesion is reduced, but emulsion stability deteriorates due to discoloration
Solution Approach 1:
The patent modifies the chemical composition parameters of the glass beads by specifying sodium hydroxide borosilicate as the material and controlling the pH to 9-10. This parameter change prevents discoloration of the emulsion while maintaining the sand adhesion reduction function, thereby preserving emulsion stability.
Solution Approach 2:
The patent uses composite glass beads made from sodium hydroxide borosilicate mixture, combining the adhesion-reducing properties of glass beads with the chemical stability provided by the specific composition. This composite material approach ensures both functional performance and emulsion stability without discoloration.
3Object-affected harmful factors
If glass beads are added to cosmetic preparations, then sand adhesion is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent specifies clear parameter ranges for the glass beads (particle diameter of 5 to 120 µm, pH of 9 to 10, hollow structure) that can be directly controlled during existing glass bead manufacturing processes. These parameter specifications allow standard manufacturing procedures to produce the required beads without requiring complex new manufacturing systems.
Data Source
AI summary
Summary: Cosmetic preparation containing at least one oil phase and glass beads made of sodium hydroxide borosilicate, wherein the preparation is in the form of an O/W emulsion emulsified with one or more emulsifiers selected from the group of compounds glyceryl stearate citrate, glyceryl stearate (self-emulsifying), stearic acid, stearate salts, polyglyceryl-3-methylglycosedearate, sodium stearoyl glutamate, sodium cetearyl sulfate, potassium cetyl phosphate, cetearyl sulfosuccinate, polyglyceryl-10 stearate, polyglyceryl-10 laurate, polyglyceryl-10 caprate.