Cosmetic Base Using Sodium Acrylate-Grafted Starch and Associative Thickener
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Solution Overview
Problem
Current cosmetic bases fail to provide a novel appearance and feeling that mimics a sherbet-like experience, with a unique sensation of soft bursting and loosening when applied to the skin, while maintaining a cool visual effect.
Innovation Solution
A cosmetic base comprising 0.15 to 0.6% sodium acrylate-grafted starch and 0.25 to 1.35% associative thickener with a polyoxyalkylene chain, within a total range of 0.5 to 1.5% by mass, which creates a sherbet-like appearance and a unique feel as if the cosmetic collapses and allows water to flow out when applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sodium acrylate-grafted starch and associative thickener are used in conventional amounts, then the cosmetic provides basic thickening and stabilization, but it fails to provide a sherbet-like appearance and the unique feeling of soft bursting and loosening
Solution Approach 1:
The patent applies parameter changes by precisely controlling the amounts of sodium acrylate-grafted starch (0.15 to 0.6% by mass) and associative thickener (0.25 to 1.35% by mass), with their total amount ranging from 0.5 to 1.5% by mass. This specific parameter range creates the sherbet-like appearance and unique soft bursting feeling, resolving the contradiction between achieving special sensory effects and using excessive thickening agents.
Solution Approach 2:
The patent uses a composite material system combining sodium acrylate-grafted starch and associative thickener with polyoxyalkylene chain in specific proportions. This composite approach creates synergistic effects that produce the novel sherbet-like appearance and feeling on use, achieving the desired sensory experience without requiring excessive amounts of individual components.
2Stability of the object's composition
If water-swelling clay mineral is added to maintain hardness, then temperature stability of hardness is improved, but the cosmetic develops a hardened texture that lacks the desired soft bursting feeling
Solution Approach 1:
The patent achieves temperature stability of hardness through parameter changes in the thickening agent system, specifically by using sodium acrylate-grafted starch and associative thickener in controlled amounts (total 0.5 to 1.5% by mass). This approach maintains hardness stability across temperatures while preserving the soft, non-hardened texture and unique feeling on use, avoiding the need for water-swelling clay minerals.
3Reliability
If conventional thickeners are used to stabilize the preparation, then thickening stability against salt concentration and pH is improved, but the cosmetic lacks the novel sherbet-like appearance and unique feeling on use
Solution Approach 1:
The patent employs a composite material system consisting of sodium acrylate-grafted starch and associative thickener with polyoxyalkylene chain in specific proportions. This composite provides both reliable thickening stability against external factors (salt concentration and pH) and the novel sherbet-like appearance with unique soft bursting feeling on use, resolving the contradiction between stability and sensory performance.
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 cosmetic base achieves a novel appearance and feeling that provides a visual cool sensation and a unique touch, suitable for use as a skin cosmetic, maintaining a refreshing and non-sticky texture.
Implementation Method 1
a cosmetic base comprising: (A) 0.15 to 0.6% by mass of sodium acrylate-grafted starch; and (B) 0.25 to 1.35% by mass of an associative thickener having a polyoxyalkylene chain
Implementation Method 2
an associative thickener composed of a relatively low molecular weight hydrophobically modified polyether urethane made of a water-soluble monomer and a hydrophobic monomer
Implementation Method 3
sodium acrylate-grafted starch has been known as a hydrophilic (high water-absorbency) polymer
Data Source
AI summary
The purpose of the present invention is to provide a cosmetic base having an unprecedented appearance and feeling on use, in particular a cosmetic base with a novel feeling on use that gives a fresh feeling of a sherbet-like appearance and a unique feel as if the cosmetic softly bursts and collapses, allowing water to flow out, when applied to the skin, and a skin cosmetic using the same. The present invention relates to a cosmetic base including (A) 0.15-0.6 mass% of sodium acrylate-grafted starch and (B) 0.25-1.35 mass% of an associative thickener having a polyoxyalkylene chain wherein the total amount of the (A) sodium acrylate-grafted starch and (B) associative thickener having a polyoxyalkylene chain compounded is 0.5-1.5 mass% and to a skin cosmetic that uses the cosmetic base.