Solid Lip Cosmetic Formulation for Adhesion Resistance
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Solution Overview
Problem
Conventional solid lip cosmetics face issues with secondary adhesion, difficulty in spreading, and an undesirable sticky or overly glossy finish, while attempting to achieve a good secondary adhesion resistance effect and long-lasting performance.
Innovation Solution
A solid lip cosmetic formulation comprising 15-50% copolymer containing dimer acid ester, 20-70% non-volatile hydrocarbon oil liquid at room temperature, and 5-15% wax, with specific compatibility and separation properties at different temperatures, along with optional color materials and limited phenyl-modified silicone, to enhance adhesion resistance, gloss, and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high viscosity oil agents such as hydrogenated polyisobutene and polyisobutylene are blended in large amounts, then secondary adhesion resistance effect is improved, but spreading difficulty and sticky finish occur
Solution Approach 1:
The patent changes the chemical parameters of the oil components by selecting specific viscosity ranges (hydrogenated polyisobutene: 50-5000 mPa·s, polyisobutylene: 50-5000 mPa·s, isopropyl myristate: 50-5000 mPa·s) and precise blending ratios. This parameter optimization allows the formulation to achieve secondary adhesion resistance while maintaining spreadability, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The patent creates a composite oil system combining multiple oil agents (hydrogenated polyisobutene, polyisobutylene, and isopropyl myristate) in specific ratios. This composite approach leverages the complementary properties of each component: hydrogenated polyisobutene and polyisobutylene provide adhesion resistance, while isopropyl myristate contributes to spreadability and reduces stickiness, thereby resolving the technical contradiction.
2Reliability
If phenyl-modified silicone is used to achieve secondary adhesion resistance, then adhesion resistance is improved, but overly glossy finish occurs
Solution Approach 1:
The patent optimizes the concentration parameter of phenyl-modified silicone to a specific range (0.1-10 parts by mass based on total oil components). By controlling this parameter within the specified range, the formulation achieves secondary adhesion resistance while preventing excessive gloss, thus resolving the contradiction between reliability and illumination intensity.
Solution Approach 2:
The patent applies phenyl-modified silicone selectively as an optional component rather than a mandatory base component. This local quality approach allows the formulation to achieve adhesion resistance where needed while avoiding over-glossiness by limiting the silicone's presence to specific concentration ranges and making it optional based on desired finish characteristics.
3Reliability
If incompatible oil components are blended at high temperature to achieve secondary adhesion resistance, then adhesion resistance is improved, but product inhomogeneity and brittleness occur
Solution Approach 1:
The patent optimizes the temperature parameter for blending incompatible oil components, specifying a range of 60-90°C. This temperature control ensures sufficient thermal energy for mixing while avoiding degradation. Additionally, the patent controls the blending ratio parameter of incompatible components (hydrogenated polyisobutene: 10-40 parts, polyisobutylene: 10-40 parts, isopropyl myristate: 10-50 parts) to maintain product homogeneity and prevent brittleness, resolving the contradiction between reliability and compositional stability.
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 formulation achieves a good secondary adhesion resistance effect, provides a glossy finish, and ensures long-lasting performance by optimizing the blend of dimer acid ester copolymers, hydrocarbon oils, and waxes, while maintaining a non-sticky texture and stability.
Implementation Method 1
the component (B) is compatible with the component (A) at 90° C. and separated from the component (A) at 25° C.
Data Source
AI summary
The present invention is to provide a solid lip cosmetic which is excellent in secondary adhesion resistance effect and long lasting performance, and provides a good glossy finish.A solid lip cosmetic which has a secondary adhesion resistance effect and provides a good glossy finish can be prepared by blending a copolymer containing a dimer acid ester, or a copolymer containing a dimer acid ester and a dimer acid ester as an oil component adhering to lips (adhesive oil component) and a hydrocarbon oil which is liquid at room temperature as an oil component seeping into the surface when the cosmetic is applied to the lips (seeping oil component).