Biodegradable Resin Particles Coating for Fluidity
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Solution Overview
Problem
Biodegradable resin particles often exhibit insufficient fluidity, leading to aggregation issues in cosmetic and filler applications, which can be attributed to their inherent properties and lack of surface modification.
Innovation Solution
The development of resin particles with a biodegradable core coated with a layer of quaternary ammonium salt-containing polymer, polyacrylamide, polyvinylpyrrolidone, or polylysine, which reduces dynamic friction and enhances surface slipperiness, thereby improving fluidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable resin particles are used without surface modification, then environmental degradability is improved, but fluidity deteriorates
Solution Approach 1:
A coating layer containing polybasic acid, polybasic acid ester, or their derivatives is applied on the surface of biodegradable resin particles. This coating layer acts as an intermediary that maintains the biodegradability of the core while providing surface properties that prevent aggregation and improve fluidity in cosmetic and filler applications.
Solution Approach 2:
The invention creates a composite structure where biodegradable resin particles are coated with a layer containing polybasic acid or its ester. This composite material combines the environmental benefits of biodegradable resin with the flow-enhancing properties of the coating layer, achieving both degradability and improved fluidity.
2Object-affected harmful factors
If biodegradable resin particles are used without surface modification, then biocompatibility is improved, but aggregation increases
Solution Approach 1:
The coating layer containing polybasic acid or its ester serves as a mediator between the biodegradable resin core and the surrounding environment. It maintains biocompatibility while introducing surface characteristics that reduce particle-particle interactions and prevent aggregation.
Solution Approach 2:
The invention changes the surface parameters of biodegradable resin particles by coating them with polybasic acid or its ester. This modification alters surface charge, hydrophilicity, or steric properties, thereby changing the interaction between particles and preventing aggregation while preserving biocompatibility.
Data Source
AI summary
Resin particles include mother particles containing a biodegradable resin, and a coating layer containing at least one selected from the group consisting of a quaternary ammonium salt-containing polymer, polyacrylamide, polyvinylpyrrolidone, and polylysine on a surface of the mother particles.