Multistage Polymer Composition for Silicone Formulation Compatibility
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Solution Overview
Problem
Existing silicone-containing polymers face compatibility issues with other ingredients in coating, personal care, and home care formulations, leading to phase separation during storage, necessitating the use of auxiliary additives for compatibilization.
Innovation Solution
A multistage polymer comprising an acrylate rich stage and a carbosiloxane rich stage, with specific weight percentages and monomer compositions, to enhance compatibility and formulational flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone containing polymers are used in formulations, then desirable properties such as water and oil repellency, stain resistance, and lubricity are improved, but compatibility with other ingredients deteriorates, leading to phase separation
Solution Approach 1:
The polymer is divided into two distinct stages: an acrylate rich stage (60-95 wt%) providing compatibility with polar ingredients, and a carbosiloxane rich stage (5-40 wt%) providing silicone performance properties. This segmentation allows each stage to fulfill its specific function while maintaining overall formulation stability and preventing phase separation.
2Stability of the object's composition
If auxiliary additives are added to compatibilize silicone containing polymers, then compatibility is improved, but device complexity increases
Solution Approach 1:
The invention merges the compatibilization function and the performance function into a single multistage polymer molecule. The acrylate rich stage provides compatibility with polar ingredients while the carbosiloxane rich stage provides silicone performance properties, eliminating the need for separate auxiliary compatibilizer additives and simplifying the overall formulation.
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 multistage polymer improves compatibility with other formulation components, allowing for tailored desirable properties such as aesthetic characteristics and enhanced performance in personal care, home care, and coating applications.
Implementation Method 1
subjecting (a) ethylenically unsaturated monomers to free-radical polymerization
Data Source
AI summary
A multistage polymer is provided, having: acrylate rich stage comprising: (a) structural units of monomer selected from C1-22 alkyl (meth)acrylates and structural units of first carbosiloxane monomer of formula (I); and (b) carbosiloxane rich stage, comprising: structural units of second carbosiloxane monomer of formula (I); wherein α is 0 to 3; wherein d is 0 or 1; wherein R1 is selected from hydrogen, C1-10 alkyl group and aryl group; wherein R2 is selected from hydrogen and C1-10 alkyl group; wherein R8 is -O-Si(CH3)3 group; wherein Y is selected from formula (II), (III) and (IV); wherein R4 and R6 are selected from hydrogen and methyl group; wherein R3 and R5 are a C1-10 alkylene group; wherein R7 is C1-10 alkyl group; wherein b is 0 to 4 and wherein c is 0 or 1; and wherein the first and second carbosiloxane monomer of formula (I) are same or different.