Encapsulated Stabilizer Masterbatch Pellets for Polymer Processing
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Solution Overview
Problem
Existing polymer additive stabilizer compositions face challenges such as incompatibility with polymerization catalysts, agglomeration, dust hazards, and low additive concentration in masterbatches, leading to inefficiencies in processing and storage due to migration and stickiness issues, especially with pasty or waxy additives.
Innovation Solution
Encapsulated masterbatch delivery system with closed-end pellets (CEPs) where stabilizers are encapsulated in a polymeric matrix, preventing migration and stickiness, and allowing for higher additive concentrations, improved handling, and reduced processing issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If stabilizers are used in granular form to facilitate blending operations, then feeding and handling is improved, but dust hazards and poor dispersion in polymer occur
Solution Approach 1:
The patent applies composite materials by combining stabilizers with an inert carrier material to form a composite granular composition. This composite structure maintains the ease of handling granular materials while the inert carrier suppresses dust generation and improves dispersion in the polymer matrix, resolving the contradiction between operational ease and dust hazard reduction.
2Quantity of substance
If high concentration of additives is used in masterbatch, then additive efficiency is improved, but migration and stickiness issues worsen
Solution Approach 1:
The patent introduces an inert carrier material as an intermediary between the stabilizer additives and the polymer matrix. This carrier acts as a mediator that allows high concentrations of additives to be incorporated without direct migration or stickiness issues, as the inert carrier provides a stable matrix that prevents additive migration while maintaining high additive loading.
3Manufacturing precision
If pre-formed blends of stabilizers are used to improve dispersion, then blending efficiency is improved, but storage agglomeration and shipping agglomeration worsen
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical parameters of the stabilizer composition through incorporation into an inert carrier matrix. This changes the composition's stability parameters, preventing agglomeration during storage and shipping while maintaining the dispersion uniformity achieved during processing, thus resolving the contradiction between manufacturing precision and storage stability.
4Adaptability or versatility
If multiple individual additive components are charged separately, then additive flexibility is improved, but processing complexity and inhomogeneity worsen
Solution Approach 1:
The patent applies merging by combining multiple stabilizer additives into a single composite granular composition with an inert carrier. This consolidation merges multiple additive components into one material that can be fed through a single hopper and feeder system, reducing processing complexity while maintaining the flexibility to select different stabilizer combinations for different applications.
Data Source
AI summary
Stabilized compositions having an organic material to be stabilized and a resin masterbatch system provided as closed end pellets are provided herein, along with processes for producing stabilized articles.