Silicone Particles Crosslinked With Alkylene Groups
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Solution Overview
Problem
Silicone particles tend to aggregate over time, leading to poor dispersibility and reduced functionality in cosmetic and resin applications, with existing methods failing to effectively control oil absorption properties and maintain storage stability.
Innovation Solution
The development of silicone particles with a hydrogen content of 300 ppm or less, crosslinked using an alkylene group with 4 to 20 carbon atoms, and a specific molar ratio of alkenyl groups to hydrogen atoms, which are produced through a method involving an organopolysiloxane and a silicon organic compound, enhancing dispersibility and storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If silicone particles are produced by curing reaction of particulate matter, then small particle size is achieved, but aggregation over time occurs
Solution Approach 1:
The patent applies parameter changes by controlling the hydrogen content to 300 ppm or less and specifying the alkylene group carbon number (4-20) in the crosslinking structure. These parameter changes modify the chemical composition and bonding characteristics of the silicone particles, resulting in enhanced stability and resistance to aggregation over time while maintaining small particle size.
2Adaptability or versatility
If organic compound is added during formation, then cosmetic raw material utility is improved, but insufficient incorporation and time-dependent aggregation occur
Solution Approach 1:
The patent achieves sufficient incorporation of organic compounds by controlling the hydrogen content parameter (300 ppm or less) and the crosslinking structure (alkylene group with 4-20 carbon atoms). This parameter control ensures that organic compounds are adequately incorporated during formation, preventing both insufficient incorporation and time-dependent aggregation, thereby maintaining storage stability while preserving cosmetic raw material utility.
3Productivity
If strong aggregation properties are present, then particle formation is enhanced, but dispersibility in solvent deteriorates
Solution Approach 1:
The patent resolves the contradiction between particle formation efficiency and dispersibility by precisely controlling the hydrogen content (300 ppm or less) and the crosslinking structure (alkylene group with 4-20 carbon atoms). These parameter changes enable the silicone particles to maintain appropriate aggregation properties during formation while ensuring good dispersibility in solvents, allowing both efficient particle formation and easy dispersion to be achieved.
4Quantity of substance
If temperature control is used to control oil absorption, then oil absorption properties are adjusted, but extended control period is required
Solution Approach 1:
The patent eliminates the need for extended temperature control periods by changing the fundamental parameter of hydrogen content to 300 ppm or less and establishing a specific crosslinking structure with alkylene groups (4-20 carbon atoms). This parameter change inherently controls the oil absorption properties during the formation process itself, eliminating the need for subsequent extended temperature control while achieving the desired oil absorption characteristics.
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 silicone particles exhibit low aggregation, improved tactile sensation, and enhanced functionality in cosmetics and resins, with a method that efficiently produces particles with improved dispersibility and storage stability.
Implementation Method 1
the silicon atom in the siloxane as a component for silicone particles is crosslinked with the other silicon atom via an alkylene group having a carbon number of 4 to 20
Implementation Method 2
silicone particles are obtained by curing an addition reaction-curable silicone composition
Data Source
AI summary
Silicone particles having excellent dispersibility are provided via the method herein. A cosmetic material having excellent feeling of use, and a highly functional paint and an electronic material are also provided. The silicone particles include a siloxane as a component. A content of a hydrogen atom bonded to a silicon atom per unit mass is 300 ppm or less, or optionally is 20 ppm or less. In addition, the silicon atom in the siloxane as a component for the silicone particles is crosslinked with another silicon atom via an alkylene group having a carbon number of 4 to 20.