Heat-Resistant Hollow Sphere Polymers for High-Temperature Opacity
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Solution Overview
Problem
Hollow polymeric particles collapse at high temperatures, impairing their ability to scatter light and provide opacity in applications like powder coating and metal coating, limiting their use to mild temperature conditions.
Innovation Solution
Development of heat-resistant hollow sphere polymers with a crosslinked core stage swollen by a volatile base, which maintains opacity and brightness when exposed to temperatures from 100°C to 350°C, by mixing the polymer dispersion with a coating composition and subjecting it to these temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If hollow polymeric particles are used to provide opacity and brightness, then light scattering ability is improved, but the particles collapse at high temperatures causing loss of opacity
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of the hollow polymer particles through crosslinking. The crosslinked network structure changes the physical and chemical parameters of the polymer, enabling it to maintain structural integrity at high temperatures (100°C to 350°C) while preserving the hollow spherical morphology necessary for light scattering and opacity.
Solution Approach 2:
The patent creates a composite structure within the hollow polymer particles by combining crosslinked polymer networks with hollow spherical morphology. This composite approach integrates the heat resistance of crosslinked polymers with the light-scattering properties of hollow spheres, achieving both high-temperature stability and opacity simultaneously.
2Ease of manufacture
If hollow polymeric particles are used to reduce product cost by replacing mineral pigments, then manufacturing cost is reduced, but application range is limited to mild temperature conditions
Solution Approach 1:
By changing the chemical parameters of the hollow polymer through crosslinking density control and composition adjustment, the patent expands the temperature range of applicability from mild conditions to high temperatures (100°C-350°C), enabling use in powder coating, plastic, metal coating, and textile coating applications while maintaining cost-effectiveness.
Solution Approach 2:
The patent achieves universality by developing hollow polymer particles that can function as opacity providers across multiple industrial applications (powder coating, plastic, metal coating, textile coating) under varying temperature conditions. The crosslinked structure provides universal heat resistance that enables the same material to be used in diverse high-temperature processing environments.
3Temperature
If hollow polymeric particles are exposed to high temperatures, then processing capability is improved, but the void structure collapses impairing light scattering
Solution Approach 1:
The patent changes the thermal parameters of the hollow polymer by introducing crosslinks that act as structural anchors. These crosslinks create a rigidified network that maintains the void structure's shape and volume even when exposed to processing temperatures of 100°C to 350°C, preventing collapse while allowing high-temperature processing.
Solution Approach 2:
The crosslinked network structure serves as a preemptive reinforcement that cushions the void structure against thermal degradation. Before exposure to high temperatures, the crosslinks are already in place to prevent polymer chain collapse, maintaining the hollow spherical shape and void integrity throughout the temperature range.
Data Source
AI summary
A method of using heat-resistant hollow sphere polymers having at least one crosslinked polymer stage, and having a core stage that has been swollen with a volatile base, in applications in which the hollow sphere polymer is exposed to temperatures of from 100°C to 350°C is provided. Articles made by the method are also provided.