Oil-Based Cosmetic Formulation Resolving Stickiness and Separation
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Solution Overview
Problem
Conventional oil-based cosmetic preparations face issues with excessive stickiness, poor preservability, and inadequate pigment dispersibility, leading to discomfort and unsatisfactory wearability.
Innovation Solution
The use of a cosmetic preparation comprising partially cross-linked polyether-modified silicone, low viscosity silicone oil, cross-linked silicone powder, and amorphous anhydrous silicic acid, which enhances spreadability, feeling, and preservability while improving pigment dispersibility and wearability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high content of oil components is used in conventional oil cosmetic preparations, then excellent adhesiveness and water-tightness are achieved, but excessive sticky or oily touch causes user discomfort
Solution Approach 1:
The patent changes the physical and chemical parameters of the base oil by using polymerized silicone with a three-dimensional cross-linked molecular structure and controlling the viscosity of low viscosity silicone oil within a specific range (1-100 mm²/s). This parameter optimization reduces the sticky touch while maintaining adhesiveness and water-tightness.
Solution Approach 2:
The patent creates a composite base oil system by combining polymerized silicone (cross-linked structure) with low viscosity silicone oil in specific proportions. This composite material approach allows the preparation to achieve both excellent adhesiveness and reduced sticky touch by leveraging the complementary properties of each component.
2Reliability
If cross-linked organopolysiloxane is added to prevent oil bleed-out, then preservability is improved, but poor moistening and powdery touch occur
Solution Approach 1:
The patent optimizes the viscosity parameter of the low viscosity silicone oil (1-100 mm²/s) and controls the content ratio between cross-linked organopolysiloxane and low viscosity silicone oil. This parameter control ensures sufficient oil mobility to prevent powdery touch while maintaining the preservative function of the cross-linked structure.
Solution Approach 2:
The patent formulates a composite base oil system combining cross-linked organopolysiloxane with low viscosity silicone oil in specific proportions. The cross-linked component provides preservability by preventing oil bleed-out, while the low viscosity silicone oil component (in optimized amounts) prevents powdery touch by maintaining adequate moisture and smoothness.
3Ease of operation
If amorphous anhydrous silicic acid is used to improve spreadability and feeling, then excellent feeling in use is achieved, but poor dispersibility of pigment occurs
Solution Approach 1:
The patent optimizes the particle size and content of amorphous anhydrous silicic acid, and controls the viscosity of the base oil system. These parameter adjustments ensure that the silicic acid provides excellent spreadability without creating aggregation that would hinder pigment dispersibility.
4Ease of operation
If the base oil viscosity is reduced to improve spreadability, then smooth application is achieved, but excessive oily touch occurs
Solution Approach 1:
The patent precisely controls the viscosity parameter of the low viscosity silicone oil within the range of 1-100 mm²/s. This parameter optimization allows the base oil to spread smoothly on the skin while maintaining a controlled level of oiliness that does not cause excessive oily touch.
Solution Approach 2:
The patent creates a composite base oil system combining polymerized silicone with low viscosity silicone oil. The polymerized silicone component provides structure and controls oil release, while the low viscosity silicone oil component (in controlled amounts) provides smooth spreadability without excessive oily touch.
Data Source
AI summary
An oil-based makeup cosmetic preparation having an excellent feeling in use and a long wearability is provided. The cosmetic preparation comprises the following components each in the following amount relative to the entire cosmetic preparation: (a) 1 to 7.5 % by mass of a partially cross-linked polyether-modified silicone or a partially cross-linked polyglycerin-modified silicone, or a combination thereof; (b) 3 to 75 % by mass of a low viscosity silicone oil with a viscosity of 1 to 100 mm2/s; (c) 0.1 to 18 % by mass of a cross-linked silicone powder; and (d) 0.1 to 5 % by mass of amorphous anhydrous silicic acid with an average particle size of 0.001 to 0.1 µm.