Regiospecific Silicone-Capped Glycerin Polyesters

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Solution Overview

Problem

Natural triglycerides lack the desired aesthetics and thermo-sensitive properties for widespread use in cosmetics, and existing polyester derivatives do not provide regiospecific terminal silicone capping, which limits their performance and skin feel.

Innovation Solution

The development of regiospecific silicone-capped glycerin polyesters through step-growth polymerization, utilizing mono-functional silicone monomers to control the placement of pendant groups, resulting in polymers with unique physical properties and high molecular weight to prevent skin penetration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If natural triglycerides are used, then energy storage function is provided, but desired aesthetics and thermo-sensitive properties are lacking

Engineering Contradiction:

Improvethermo-sensitive propertiesVSAvoidaesthetics

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent creates composite polymer structures by linking triglycerides into polymer backbones and capping with monofunctional silicone products, combining the energy storage function of natural triglycerides with the aesthetic and thermo-sensitive properties of silicone-capped polymers

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention introduces regiospecific substitution patterns where silicone groups are placed at terminal positions and pendant groups are positioned at specific locations along the polymer backbone, creating localized functional domains that provide both aesthetic appeal and thermo-sensitive behavior

Inventive Principle:

Principle #3Local quality

2Ease of operation

If low molecular weight non-polymeric products are applied to skin, then penetration occurs, but unintended consequences result from gene regulation

Engineering Contradiction:

Improveskin penetrationVSAvoidunintended gene regulation

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent changes the molecular weight parameter by polymerizing triglycerides into high molecular weight polymers (above 1,500 mwu), which prevents skin penetration and eliminates the harmful gene regulation effects while maintaining cosmetic functionality

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The polymer structure acts as an intermediary that prevents direct contact between active ingredients and skin cells, using the polymer backbone as a carrier that delivers cosmetic benefits without allowing penetration of potentially harmful low molecular weight compounds

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If regiospecific terminal silicone capping is implemented, then skin feel and spreadability improve, but synthesis complexity increases

Engineering Contradiction:

ImprovespreadabilityVSAvoidsynthesis regime

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent employs preliminary action by using mono-functional silicone monomers that are pre-designed to attach at terminal positions, and by controlling polymerization conditions in advance to achieve regiospecific substitution patterns, thereby simplifying the overall synthesis process despite the complexity of the target structure

Inventive Principle:

Principle #10Preliminary action

4Adaptability or versatility

If pendant groups with varying fatty chain length are incorporated, then unique multi-dimensional polymer properties are achieved, but manufacturing precision requirements increase

Engineering Contradiction:

Improvemulti-dimensional polymer propertiesVSAvoidregio-specific substitution control

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The invention applies local quality by incorporating pendant groups with varying fatty chain lengths at specific positions along the polymer backbone, creating localized domains with different properties (solid and liquid pendant group domains) that collectively provide unique multi-dimensional characteristics

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent creates composite polymer structures by combining triglyceride backbones with diverse pendant groups of varying fatty chain lengths and terminal silicone capping, resulting in a multi-phase material with both solid and liquid domains that exhibits unique shear and flow behaviors

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS9289370B1Terminal silicone capped regiospecific glycerin polyesters

Publication Date: 2016.03.22 SURFATECH

AI summary

The present invention is directed to a series of glycerin based polymers that have been designed to have very specific substitution patterns, herein referred to as regiospecific substitution (RSS). The attachment of terminal mono-functional silicone polymers engineered polyesters of glycerin results in heretofore unrecognized products. The unique properties include lower surface tension, better spreadability and a dry skin feel, all of which cannot be attained without the use of a terminal silicone. Incorporation of silicone into the terminal position requires a very specific synthesis regime to establish the sought after regiospecificity.