Oil-in-Water Emulsion Cosmetic Using Cyclic Carboxamide Derivative
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Solution Overview
Problem
Existing cosmetics using alkyl-modified carboxyvinyl polymers and cyclic carboxamide derivatives often result in a sticky feel, which is undesirable for user experience.
Innovation Solution
An oil-in-water emulsion cosmetic formulation combining a specific cyclic carboxamide derivative, an alkyl-modified carboxyvinyl polymer, and an oil, with specific structural and compositional requirements, to enhance the feel and prevent stickiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cyclic carboxamide derivative is used in a cosmetic, then anti-wrinkle effect and pigmentation inhibitory effect are achieved, but a sticky feel is caused
Solution Approach 1:
The patent changes the molecular structure parameters of the cyclic carboxamide derivative by introducing specific substituents (R1 being hydrocarbon group with 1-6 carbon atoms, optionally substituted with hydroxy group) and controlling the ring structure (X being —CH2— or —N(R2)—). These parameter changes modify the physical properties of the derivative to reduce stickiness while maintaining the anti-wrinkle and pigmentation inhibitory effects.
Solution Approach 2:
The patent creates a composite cosmetic formulation by combining the modified cyclic carboxamide derivative with an alkyl-modified carboxyvinyl polymer. This composite approach allows the derivative to provide anti-wrinkle and pigmentation benefits while the polymer matrix controls the sensory properties, preventing the sticky feel associated with pure cyclic carboxamide derivatives.
2Object-generated harmful factors
If an alkyl-modified carboxyvinyl polymer is blended as an emulsifier, then a fresh feel is imparted and sticky feel is suppressed, but the feel in use requires further improvement
Solution Approach 1:
The patent merges two functional components: the alkyl-modified carboxyvinyl polymer (which provides fresh feel and suppresses stickiness) and the modified cyclic carboxamide derivative (which provides anti-wrinkle and pigmentation effects). This combination allows the cosmetic to maintain the advantages of both ingredients while achieving an excellent overall feel in use that neither ingredient could provide alone.
Data Source
AI summary
[Problem] To provide an oil-in-water emulsion cosmetic having an excellent feel in use.[Solution] An oil-in-water emulsion cosmetic including (A) a cyclic carboxamide derivative having a specific structure or its salt, (B) an alkyl-modified carboxyvinyl polymer, (C) an oil, and (D) water.