Sugar-Plum Composite Particles for Heat Resistance and Fluidity
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Solution Overview
Problem
Conventional organic resin particles used in plastics and rubbers have low heat resistance, are prone to cohesion, and lack adequate fluidity and uniform dispersion due to their spherical shape and low heat resistance, which limits their functionality and optical properties.
Innovation Solution
The process involves coating organic resin particles with polyorganosiloxane to form sugar-plum-shaped particles with projections, using organotrialkoxysilane and an alkaline substance in a dehydration condensation reaction to improve fluidity and optical features, with a specific ratio of polyorganosiloxane to organic resin and controlled pH and temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic resin particles are used as additives in plastics and rubbers, then they provide basic functionality, but they exhibit low heat resistance and are prone to cohesion at elevated temperatures
Solution Approach 1:
The patent creates composite particles by coating organic resin particles with polyorganosiloxane. This composite structure combines the functionality of organic resin particles with the heat resistance and non-cohesive properties of polyorganosiloxane, resolving the contradiction between maintaining basic functionality and achieving heat resistance while preventing cohesion.
Solution Approach 2:
The patent modifies the surface properties of organic resin particles by changing their chemical composition through coating with polyorganosiloxane. This parameter change in surface chemistry transforms the particles from cohesive to non-cohesive while maintaining their core functionality and shape.
2Ease of operation
If spherical particles with uniform polyorganosiloxane coating are produced, then fluidity is improved to a certain degree, but optical features such as light diffusivity are inadequate
Solution Approach 1:
The patent introduces asymmetry in particle shape by creating sugar-plum-shaped particles with protrusions rather than perfect spheres. This asymmetric shape provides both adequate fluidity for processing and superior light diffusivity for optical applications, resolving the contradiction between these two properties.
Solution Approach 2:
The patent creates local variations in particle surface topology by forming protrusions on the sugar-plum-shaped particles. These local structural features enhance light scattering and diffusivity while the overall particle shape maintains adequate fluidity for processing.
3Manufacturing precision
If conventional coating processes are used to form composite particles, then uniform spherical coating is achieved, but fluidity and optical features are insufficient
Solution Approach 1:
The patent changes the coating process parameters and chemistry to achieve non-uniform sugar-plum-shaped particles with protrusions. This parameter change in the coating process transforms the outcome from uniform spherical coating to asymmetric sugar-plum shape, providing both adequate fluidity and optical features.
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 sugar-plum-shaped particles exhibit enhanced heat resistance, improved fluidity, and superior light diffusivity, maintaining performance even after heat treatment, making them suitable for various applications in plastics, rubbers, and cosmetic products.
Implementation Method 1
organotrialkoxysilane and/or an organotrialkoxysilane hydrolysate as a main component compound, organic resin particles that are dispersed, and an alkaline substance or an alkaline aqueous solution are added into a reaction system before the main component compound undergoes a dehydration condensation reaction, and polyorganosiloxane projections are precipitated on surfaces of the organic resin particles through a dehydration condensation reaction of the main component compound
Implementation Method 2
an alkaline substance or an alkaline aqueous solution are added into a reaction system before the main component compound undergoes a dehydration condensation reaction
Implementation Method 3
polyorganosiloxane projections are precipitated on surfaces of the organic resin particles through a dehydration condensation reaction of the main component compound
Data Source
AI summary
To obtain a sugar-plum shaped composite particle, a reaction vessel with 300 parts by weight of water placed therein is charged with 30 parts by weight of polymethyl methacraylate resin particles of 2 μm average particle diameter, and ultrasonic waves are applied to the mixture for 1 minute to obtain a particle dispersion liquid. Subsequently, 15 parts by weight of methyltrimethoxysilane is added to the dispersion liquid to obtain methyltrimethoxysilane hydrolyzates in the dispersion liquid. Thereafter, 10 parts by weight of 1 weight % aqueous ammonia is added thereto and agitated. One minute later, the agitation is discontinued, and the mixture is allowed to stand still for 10 hours to effect maturation. The resultant mixture is filtered and dried to obtain sugar-plum-shaped particles provided on their surfaces with polyorganosiloxane projections.