Fluorinated Silicone Polymer Homogeneous Composition
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Solution Overview
Problem
Fluorine-modified silicone compounds exhibit poor compatibility and affinity with other materials, leading to issues in dispersion stability and application, particularly in creating homogeneous, pasty compositions that are both water- and oil-repellent with low viscosity silicone oils.
Innovation Solution
A fluorine-containing silicone polymer with a three-dimensional, cross-linked structure, comprising a specific amount of fluorine atoms and silicone side chains, is developed through addition polymerization of specific organopolysiloxane components, which enhances swellability with low viscosity silicone oils and improves affinity with other materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fluorine-modified silicone compounds are used to provide water- and oil-repellency, then surface energy is reduced and repellency is improved, but compatibility and affinity with other materials deteriorate
Solution Approach 1:
The patent applies local quality by creating a polymer structure where different segments have different functions: fluorinated segments provide water- and oil-repellency through low surface energy, while non-fluorinated segments (such as methyl or phenyl groups) provide compatibility and affinity with other materials. This spatial differentiation of properties within the same polymer molecule resolves the contradiction between repellency and compatibility.
Solution Approach 2:
The patent uses composite materials by combining fluorinated organopolysiloxane units with non-fluorinated organopolysiloxane units in a single polymer chain. The fluorinated portions provide the desired repellency properties, while the non-fluorinated portions ensure good compatibility with paints, cosmetics, and other materials, thus achieving both requirements simultaneously.
2Ease of operation
If low viscosity silicone oils are used to create homogeneous pasty compositions, then safety and ease of application are improved, but a large amount of thickening agent is necessary leading to poor stability and homogeneity
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure of the silicone polymer to include specific functional groups that provide thickening capability without requiring large amounts of additional thickening agents. The fluorinated segments and cross-linkable groups enable the polymer to self-thicken and stabilize the pasty composition, maintaining homogeneity and stability while using low viscosity silicone oils.
Solution Approach 2:
The fluorinated organopolysiloxane polymer serves its own thickening and stabilizing function through its molecular structure, eliminating the need for separate thickening agents. The polymer's ability to form cross-linked structures and interact with low viscosity silicone oils provides self-thickening properties that ensure composition stability and homogeneity.
3Object-affected harmful factors
If high content of fluorine-substituted alkyl groups is used to achieve good water- and oil-repellency, then repellency is improved, but affinity with non-fluorinated materials deteriorates
Solution Approach 1:
The patent applies local quality by positioning fluorinated alkyl groups at specific locations within the polymer structure where they can provide repellency effects, while other portions of the polymer chain remain non-fluorinated to maintain affinity with non-fluorinated materials. This localized placement of functional groups optimizes both properties.
Solution Approach 2:
The patent uses parameter changes by controlling the fluorine content and distribution within the polymer structure. Rather than using high content of fluorine-substituted alkyl groups throughout the entire polymer, the invention optimizes the fluorine content at specific positions to achieve sufficient repellency while maintaining overall compatibility with non-fluorinated 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 resulting composition is stable, homogeneous, and provides excellent water- and oil-repellency, with a smooth touch and good affinity with organic solvents, paints, and cosmetics, while maintaining swellability with low viscosity silicone oils.
Implementation Method 1
a fluorine-containing silicone polymer with a three-dimensional, cross-linked structure... is very swellable with low viscosity silicone oils
Implementation Method 2
prepared by addition polymerizing the following (A), (B) and (C)... a vinyl group-containing organopolysiloxane... an organohydrogenpolysiloxane
Data Source
AI summary
Present invention provides a fluorine-containing organopolysiloxane composition comprising a fluorine-containing silicone polymer having a three-dimensional, cross-linked structure, prepared by addition polymerizing the following (A), (B) and (C) and containing 10 to 30 mass % of the fluorine atoms, relative to a total mass of (A) to (C),(A) a vinyl group-containing organopolysiloxane represented by the following formula (1):(B) an organohydrogenpolysiloxane represented by the following formula (2):and(C) an organopolysiloxane having a reactive group on one end alone and represented by the following formula (3),and further comprising(D) a low viscosity silicone oil with a dynamic viscosity of 50 mm2/s or less at 25 degrees C.