Network Copolymer Crosslinked Compositions for Personal Care Stability
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Solution Overview
Problem
Network copolymer compositions that can exhibit a range of physical properties, such as hydrophilicity and hydrophobicity, are needed for various applications, but existing methods struggle to produce polymers with desired water and oil swellability and stability, particularly in personal care and cosmetic products.
Innovation Solution
A network composition is created through the reaction of anionic polymerizable ethylenically unsaturated monomers, additional copolymerizable monomers like acrylic acid/acrylate, and a cross-linking agent, which allows for varying degrees of swelling and stability by forming a cross-linked structure capable of hydrogen bonding with solvents, enabling the polymer to swell significantly and maintain stability over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network copolymer compositions are made by simultaneously polymerizing and cross-linking ethylenically unsaturated monomers, then the polymers can exhibit desired physical properties for personal care applications, but the compositions face challenges in achieving optimal water and oil swellability and stability
Solution Approach 1:
The patent applies local quality by creating regions within the polymer network with different swelling characteristics. The crosslinked network structure allows certain regions to be more hydrophilic while others remain hydrophobic, enabling the material to exhibit both water and oil swellability simultaneously with enhanced stability in personal care formulations
Solution Approach 2:
The invention uses composite materials by combining ethylenically unsaturated monomers with specific organic substituents that provide both hydrophilic and hydrophobic characteristics. This composite approach within the polymer network enables the material to achieve desired physical properties including controlled swellability and improved stability
2Ease of operation
If the polymer network is designed for high water or oil swellability, then the sensory feel in personal care products is improved, but the stability and resistance to syneresis may be compromised
Solution Approach 1:
The patent applies parameter changes by systematically varying the composition of ethylenically unsaturated monomers, the degree of crosslinking, and the ratio of hydrophilic to hydrophobic segments. These parameter adjustments enable optimization of both sensory feel through controlled swellability and resistance to syneresis through appropriate network density, resolving the contradiction between these two properties
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 network polymer composition exhibits high stability, resistance to syneresis, and can be tailored for water or oil swellability, providing improved sensory feel and longevity in personal care and cosmetic applications.
Implementation Method 1
These compositions have been made by simultaneously polymerizing and cross-linking, in the presence of a free radical polymerization catalyst
Implementation Method 2
a cross-linking agent (III), capable of copolymerizing with (I) and (II)
Implementation Method 3
forming a cross-linked structure capable of hydrogen bonding with solvents, enabling the polymer to swell significantly
Data Source
AI summary
The present invention is directed to a network composition having the reaction product of: (i) at least one anionic polymerizable ethylenically unsaturated monomer (I) selected from the group consisting of[CH2═C(R3)C(O)OXa(C2H4O)b(C3H6O)c(C4H8O)d]pP(O)(OY)q(OZ)r whereR3═H or alkyl of 1 to about 6 carbon atoms;X=alkyl, aryl, or alkaryl diradical connecting group of 0 to about 9 carbon atoms; a is 0 to about 100; b is 0 to about 100; c is 0 to about 100; d is 0 to about 100; q is 0 to about 2; r is 0 to about 2; p is 1 to about 3 subject to the limitation that p+q+r=3; and Y and Z is H, or metal ion; andCH2═C(R3)C(O)OXa′(C2H4O)b′(C3H6O)c′(C4H8O)d′—SO3—Y)where R3═H or alkyl of from 1 to about 6 carbon atoms;X=alkyl, aryl, or alkaryl diradical connecting group of 0 to about 9 carbon atoms;a′ is 0 to about 100; b′ is 0 to about 100; c′ is 0 to about 100; d′ is 0 to about 100; Y is H, or metal ion; and(ii) one or more additional monomers (II) selected from the group consisting of acrylic acid/acrylate, methacrylic acid/methacrylate, acrylamides, vinyl acetate and styrene, which are copolymerizable with (I); and(iii) a cross-linking agent (III), capable of copolymerizing with (I) and (II).