Skin Smoothing Composition Using Interpenetrating Polymer Network

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Solution Overview

Problem

Existing skin smoothing compositions face challenges such as discomfort, skin irritation, film brittleness, and visibility due to high sodium silicate levels, which exacerbate other issues like reduced contraction and increased whiteness when attempting to address these problems.

Innovation Solution

A skin smoothing composition comprising 0.5 to 10% interpenetrating polymer of polyurethane and polyacrylic polymer, along with 0.1 to 5% crosslinked acrylic acid homopolymers as a thickener, and 10 to 98% water, which forms a flexible, transparent, and non-irritating film for effective skin contraction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If high levels of sodium silicate are used to achieve skin contraction and wrinkle reduction, then immediate wrinkle reduction is improved, but skin irritation increases and film brittleness increases

Engineering Contradiction:

Improvewrinkle reductionVSAvoidskin irritation

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by replacing sodium silicate with a specific polymer blend (polyvinyl pyrrolidone 17-30 and carboxymethyl cellulose 5-20%) to achieve similar skin contraction effects without the harmful side effects of irritation and brittleness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite polymer system combining polyvinyl pyrrolidone 17-30 and carboxymethyl cellulose 5-20% in specific ratios to create a film that provides both contraction and flexibility, eliminating the brittleness problem associated with single-component systems like sodium silicate

Inventive Principle:

Principle #40Composite materials

2Shape

If high levels of sodium silicate are used to achieve skin contraction, then immediate wrinkle reduction is improved, but film brittleness increases reducing durability

Engineering Contradiction:

Improvewrinkle reductionVSAvoidfilm flexibility

Core Design Contradiction:

ShapeVSStrength

Solution Approach 1:

The patent employs a composite polymer system where polyvinyl pyrrolidone 17-30 provides contraction while carboxymethyl cellulose 5-20% provides flexibility and durability, creating a balanced film that is both effective and long-lasting

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes the concentration parameters of each polymer component (PVP 17-30% and CMC 5-20%) to achieve the desired balance between contraction strength and film flexibility, preventing brittleness while maintaining wrinkle reduction efficacy

Inventive Principle:

Principle #35Parameter changes

3Shape

If adhesive contractile film formers are used to smooth wrinkles, then wrinkle reduction is improved, but the film becomes visible and whitish

Engineering Contradiction:

Improveskin smoothnessVSAvoidfilm visibility

Core Design Contradiction:

ShapeVSIllumination intensity

Solution Approach 1:

The patent adjusts the molecular weight and concentration parameters of the polymer components to create a film with optimal optical properties that is invisible or naturally finish, eliminating the whitish appearance problem

Inventive Principle:

Principle #35Parameter changes

4Shape

If adhesive contractile film formers are used to contract skin, then wrinkle reduction is improved, but discomfort and irritation increase

Engineering Contradiction:

Improveskin contractionVSAvoiddiscomfort

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the chemical composition parameters by using biocompatible polymers (PVP and CMC) at optimized concentrations to achieve gentle skin contraction without discomfort or irritation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite polymer system where both components are known for their biocompatibility and skin-friendly properties, reducing irritation while maintaining contraction efficacy

Inventive Principle:

Principle #40Composite materials

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 excellent initial and lasting skin contraction while minimizing residual whiteness and irritation, providing a more comfortable and effective solution for reducing wrinkle appearance compared to existing products.

Implementation Method 1

Sodium silicate is an adhesive, contractile film forming ingredient used today

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

A select group of film formers are also adhesive to skin and even contractile. When an adhesive, contractile film former is applied, the skin at the bottom of the valley or crevice may be pulled to the surface

Methodology Applied

Scientific EffectContraction: Length Contraction

Data Source

PatentUS10617624B2Methods for smoothing wrinkles and skin texture imperfections

Publication Date: 2020.04.14 PROCTER & GAMBLE CO

AI summary

A skin smoothing composition that has from about 0.5 to about 10%, by weight, of an interpenetrating polymer that is a co-polymer of polyurethane and a polyacrylic polymer. The composition further contains from about 0.1% to about 5%, by weight, of a thickener made from homopolymers of acrylic acid crosslinked with a cross linker selected from the group consisting of an allyl ether pentaerythritol, allyl ether of sucrose, allyl ether of propylene and mixtures thereof and from about 10 to 98% water.