Epoxy-Amino Silane Copolymers for Durable Hair Care Films
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Solution Overview
Problem
Existing silicone-based copolymers used in personal care and textile treatments are liquids with limited durability and require heat treatment or reducing steps, making them inconvenient for practical applications.
Innovation Solution
A composition formed by reacting an oxirane or oxetane compound with an amino silane, creating a cross-linked network that imparts hydrophobic or hydrophilic properties to hair and skin, enhancing their response to water without the need for heat treatment or reducing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing silicone-based copolymers are used in personal care and textile treatments, then the materials can be applied to surfaces, but they show limited durability and require heat treatment or reducing steps
Solution Approach 1:
The patent changes the chemical parameters of the silicone copolymer by incorporating reactive groups (epoxy and amino) that enable cross-linking. This parameter change transforms the material from a simple liquid polymer to a cross-linked network structure that provides enhanced durability without requiring heat treatment or reducing steps, directly resolving the contradiction between reliability and process complexity
Solution Approach 2:
The patent creates a composite material system by combining silicone copolymer chains with cross-linking agents (epoxy compounds and amino silanes). This composite approach forms a three-dimensional network structure that enhances the durability and performance of the material while simplifying the application process, as the cross-linking occurs automatically upon application to the substrate
2Adaptability or versatility
If linear alternating copolymers and linear random copolymers are used, then the materials can be made with various organic substituents, but they are liquids with limited durability when applied to a surface
Solution Approach 1:
The patent transforms linear copolymer materials into cross-linked composite networks by incorporating reactive epoxy and amino groups. This creates a three-dimensional structure that maintains the versatility of different organic substituents while providing enhanced durability and film-forming properties, resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent introduces local cross-linking points throughout the polymer structure where epoxy and amino groups react to form cross-links. This local quality change transforms the bulk liquid polymer into a durable cross-linked network, enhancing durability while preserving the ability to modify properties through different organic substituents
3Reliability
If cross-linking is performed to improve durability, then the materials can form durable films, but the hydrolyzing step has to be performed shortly before use, which is not very convenient for the hair care product end-user
Solution Approach 1:
The patent incorporates cross-linkable groups (epoxy and amino) directly into the silicone copolymer structure during synthesis. This preliminary action allows the cross-linking to occur automatically upon application to the substrate, eliminating the need for separate hydrolyzing steps before use and greatly improving user convenience while maintaining durable film formation
Solution Approach 2:
The patent designs the silicone copolymer to be self-cross-linking by incorporating reactive epoxy and amino groups that automatically react upon application to the substrate. This self-service mechanism eliminates the need for user-performed hydrolyzing steps, making the product convenient for end-users while ensuring durable film formation through automatic cross-linking
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 resulting polymer provides durable hydrophobic or hydrophilic films on hair and skin, improving water resistance and conditioning effects, withstanding multiple washes and offering thermal protection and styling benefits.
Implementation Method 1
A composition is formed by reacting an oxirane or oxetane compound with an amino silane, creating a cross-linked network
Implementation Method 2
The resulting polymer provides durable hydrophobic or hydrophilic films on hair and skin
Data Source
AI summary
The present invention provides for a personal care composition suitable for treating hair comprising a composition comprising the reaction product of a) an oxirane or oxetane compound comprising at least two oxirane or oxetane groups; and b) an amino silane having the formula: N(H)(R1)R2Si(OR3)3-a-b-c(OR4)a(R5Si(OR6)d(R7)c)bR8c with R1 is chosen from the group consisting of H or a monovalent hydrocarbon radical containing one to 20 carbon atoms; R2 is selected from a group consisting of a divalent linear or branched hydrocarbon radical consisting of 1-60 carbons; R4 is a hydrocarbon radical that contains 3 to 200 carbon atoms; R5 is selected from a group consisting of oxygen or a divalent linear or branched hydrocarbon radical consisting of 1-60 carbons; R3, R6, R7, and R8 and are each independently selected from the group of monovalent linear or branched hydrocarbon radicals having from 1 to 200 carbon atoms; the subscript b is zero or a positive number and has a value ranging from 0 to 3; the subscripts a is zero or appositive number less than 3, the subscripts b and c are zero or positive and have a value ranging from 0 to 3 subject to the limitation that (a+b+c)<3; the subscripts d and e are zero or positive and have a value ranging from 0 to 3 subject to the limitation that (d+e)=3, wherein when hair is treated with said personal care composition said hair has a hydrophobic response to water.