Dextrin Ester Acrylic Polymer UV Composition Whitening
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Solution Overview
Problem
Current photoprotective cosmetic compositions often compromise on cosmetic properties such as greasiness, tackiness, and whitening due to the use of mineral screening agents like titanium dioxide and zinc oxide, which are effective but aesthetically undesirable.
Innovation Solution
A composition combining UV-screening agents with a specific acrylic polymer and dextrin esters, such as dextrin palmitate or dextrin myristate, that provides high SPF without the unwanted cosmetic side effects, maintaining a non-greasy, non-tacky finish and preventing skin whitening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mineral screening agents (titanium dioxide or zinc oxide) are used to increase sun protection, then UV-screening effectiveness is improved, but cosmetic properties deteriorate due to whitening effect
Solution Approach 1:
The patent extracts and removes the harmful whitening effect by replacing mineral screening agents with organic UV-screening agents that do not cause whitening. The composition uses organic compounds (such as avobenzone, pinolyl methoxycinnamate, or their mixtures) that provide UV protection without the cosmetic defect of whitening, thus separating the protective function from the harmful cosmetic effect.
Solution Approach 2:
The patent changes the chemical parameters of the screening agents from inorganic (mineral) to organic compounds. By transitioning from titanium dioxide or zinc oxide to organic UV filters with specific chemical structures and absorption characteristics, the composition achieves high SPF values while eliminating the whitening effect, thereby improving both protection and cosmetic properties.
2Reliability
If mineral screening agents are used to achieve high SPF, then UV protection is improved, but cosmetic properties deteriorate due to greasy finish and tack
Solution Approach 1:
The patent extracts and eliminates the greasy finish and tack associated with mineral screening agents by using organic UV-screening agents that do not impart these undesirable cosmetic properties. The organic compounds provide UV protection without the heavy, greasy sensation and lingering tackiness characteristic of mineral-based sunscreens.
Solution Approach 2:
The patent creates a composite formulation combining organic UV-screening agents with specific carriers and adjuvants to achieve high SPF while maintaining desirable cosmetic properties. The composite nature of the formulation allows optimization of both protective performance and cosmetic appeal, eliminating the greasy finish and tack associated with mineral agents.
3Object-generated harmful factors
If organic screening agents are used to avoid whitening, then cosmetic properties are improved, but UV-screening effectiveness may be compromised
Solution Approach 1:
The patent optimizes the chemical parameters of organic UV-screening agents to achieve high SPF values. By selecting organic compounds with specific molecular structures, absorption spectra, and concentrations, the formulation attains high UV protection effectiveness while maintaining the advantage of no whitening effect. The parameter optimization ensures both cosmetic and protective performance.
Solution Approach 2:
The patent develops a composite system combining multiple organic UV-screening agents with complementary absorption characteristics to achieve broad-spectrum UV protection at high SPF levels. This composite approach allows the formulation to attain high UV-screening effectiveness while avoiding the whitening effect, as the organic compounds provide protection without mineral-based whitening.
4Reliability
If high concentration of UV-screening agents is used to achieve high SPF, then UV protection is improved, but cosmetic properties deteriorate due to increased greasiness and tack
Solution Approach 1:
The patent optimizes the concentration parameters of UV-screening agents to achieve high SPF values without excessive greasiness and tack. By carefully controlling the amount of active ingredients and adjusting the formulation parameters, the composition attains high UV protection while maintaining acceptable cosmetic properties, avoiding the point where increased concentration leads to undesirable greasy and tacky sensations.
Solution Approach 2:
The patent uses carrier substances and adjuvants that replicate or enhance the UV-blocking function without contributing to greasiness and tack. These auxiliary components copy the protective function while maintaining a lighter, less greasy formulation, allowing high SPF achievement without proportional increases in cosmetic defects.
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 achieves high SPF values while ensuring a non-greasy, non-tacky finish and preventing skin whitening, effectively filtering UV radiation across the 250-400 nm range without compromising on cosmetic appeal.
Implementation Method 1
one or more UV-screening agents... effectively filtering UV radiation across the 250-400 nm range
Data Source
AI summary
The present invention relates to a composition, especially a cosmetic, in particular photoprotective, composition, comprising at least: -one or more particular acrylic polymers -one or more fatty acid esters of dextrin, and -one or more UV-screening agents.