Silicone Resin-Coated Elastomer Particles for Organic Resins
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Solution Overview
Problem
Silicone elastomer particles exhibit poor dispersibility and agglomeration in organic resins, leading to inadequate performance as stress relief agents and cosmetic raw materials, with existing coatings not fully addressing these issues.
Innovation Solution
Silicone resin coated silicone elastomer particles with a surface coating of DQ, DT, or TQ silicone resin, made from specific siloxane units and crosslinked by a silalkylene group, are produced using a process involving emulsification and condensation reactions, enhancing dispersibility and workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone elastomer particles are added to organic resin, then stress relief performance is improved, but dispersibility deteriorates and agglomeration occurs
Solution Approach 1:
A silicone resin coating is introduced as an intermediary layer between the silicone elastomer core and the organic resin matrix. This coating layer comprises siloxane units (D, T, and Q units) that provide compatibility with the organic resin while maintaining the elastomeric properties of the core, thereby preventing agglomeration and improving dispersibility without sacrificing stress relief performance
Solution Approach 2:
The invention creates a composite particle structure with a silicone elastomer core and a silicone resin coating shell. This composite structure combines the stress relief properties of the elastomer with the dispersibility and compatibility of the resin-coated surface, resolving the contradiction between performance and dispersibility
2Stability of the object's composition
If silicone resin coating is applied to improve dispersibility, then dispersibility is improved, but workability deteriorates due to scattering and adhesion to containers
Solution Approach 1:
The invention optimizes the molecular structure parameters of the silicone resin coating by controlling the ratio of D, T, and Q siloxane units. This parameter optimization adjusts the surface properties to reduce adhesion to container walls while maintaining dispersibility, thereby improving workability without sacrificing the dispersibility benefits of the coating
3Reliability
If silicone elastomer particles are used alone, then stress relief performance is achieved, but uniformity of dispersion deteriorates
Solution Approach 1:
The silicone resin coating acts as a mediator that prevents direct interaction between elastomer particles and the organic resin matrix, reducing aggregation tendencies and promoting uniform distribution. This intermediary layer ensures homogeneous dispersion throughout the resin while preserving the stress relief functionality of the elastomer core
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 coated particles demonstrate improved dispersibility, reduced secondary aggregation, and enhanced workability, making them suitable for organic resin additives and cosmetic applications with superior stress relief and tactile properties.
Implementation Method 1
a silicone resin coated silicone elastomer particle in which part or all of a surface of the silicone elastomer particle is coated with a silicone resin made up of two types of siloxane units selected from D siloxane units, T siloxane units, and Q siloxane units
Implementation Method 2
the surface of the mixture is coated with a silicone resin that is a condensation product of the hydrolyzable silanes
Implementation Method 3
having a structure in which at least two silicone atoms in the silicone elastomer particle are crosslinked by a silalkylene group having 2 to 20 carbons
Implementation Method 4
a process in which a mixture containing a crosslinkable silicone component and hydrolyzable silanes are emulsified in water
Data Source
AI summary
Provided is a silicone resin coated silicone elastomer particle which can be easily produced on an industrial scale, has superior dispersibility and oil absorptivity in a curable organic resin such as an epoxy resin, and has superior workability due to low secondary aggregation compared to conventional silicone elastomer particles. Also provided are applications containing the particles such as organic resin additives, organic resins, coating compositions or coating agent compositions, and cosmetic compositions. The silicone resin coated silicone elastomer particles have part or all of their surface coated with a silicone resin made up of two types of siloxane units. The siloxane units are selected from D units represented by R2SiO2/2, T units represented by RSiO3/2, and Q units represented by SiO4/2. The particles also have a structure in which at least two silicon atoms in the particles are cross-linked by a silalkylene group with 2 to 20 carbon atoms.