Polyester Resin Composition with Triazine Nucleating Agent
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Solution Overview
Problem
Conventional polyester resin compositions face challenges in achieving high crystallinity and heat resistance while maintaining transparency, which are essential for wide-ranging applications, and existing crystal nucleating agents often compromise transparency during crystallization.
Innovation Solution
Incorporating a specific 2-amino-1,3,5-triazine derivative as a crystal nucleating agent in the polyester resin composition, which enhances crystallization rates and maintains excellent transparency in molded products, thereby improving heat resistance and molding processability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional crystal nucleating agents are used to increase crystallization rate, then productivity is improved, but transparency of the molded product deteriorates
Solution Approach 1:
The patent applies parameter changes by carefully controlling the particle diameter of inorganic crystal nucleating agents to be 0.1 μm or less, and by optimizing the ratio of different nucleating agents (talc 0.01-5 parts, boron nitride 0.01-5 parts, and calcium sulfate 0.01-5 parts per 100 parts of poly(lactic acid) resin). This specific parameter optimization enables the resin to achieve high crystallization rate while maintaining excellent transparency in molded products.
Solution Approach 2:
The patent employs composite materials by combining multiple types of crystal nucleating agents (inorganic particles: talc, boron nitride, calcium sulfate) with specific surface treatments. The composite approach leverages the synergistic effects of different nucleating agents to achieve both high crystallization rate and maintained transparency, resolving the contradiction between productivity improvement and transparency preservation.
2Stability of the object's composition
If mold temperature is increased to extend cooling time, then crystallinity is improved, but molding cycle is extended reducing productivity
Solution Approach 1:
The patent applies preliminary action by incorporating crystal nucleating agents into the poly(lactic acid) resin before molding. These pre-added nucleating agents initiate crystal formation during the molding process itself, enabling the resin to achieve high crystallinity without requiring extended cooling times or elevated mold temperatures, thus maintaining short molding cycles and high productivity.
Solution Approach 2:
The patent changes the chemical composition parameters of the resin by adding specific inorganic nucleating agents with controlled particle sizes and ratios. This compositional modification enables the resin to crystallize rapidly at conventional molding temperatures, achieving high crystallinity without extending the molding cycle, thereby resolving the contradiction between crystallinity improvement and productivity maintenance.
3Temperature
If crystal nucleating agents are added to improve crystallization rate, then heat resistance is improved, but transparency of the resin composition deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the particle diameter of inorganic nucleating agents to 0.1 μm or less and controlling their concentration ratios. This fine particle size control minimizes light scattering while maintaining effective nucleation activity, enabling the resin to achieve high heat resistance through rapid crystallization while preserving excellent transparency in the final molded product.
Solution Approach 2:
The patent uses composite materials by combining multiple inorganic nucleating agents (talc, boron nitride, calcium sulfate) with specific surface treatments and controlled particle sizes. This composite approach creates a synergistic effect that enhances crystallization rate and heat resistance while the fine particle distribution maintains optical transparency, resolving the contradiction between heat resistance improvement and transparency preservation.
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 use of the 2-amino-1,3,5-triazine derivative promotes crystallization in polyester resins, resulting in products with enhanced heat resistance, mechanical strength, and transparency, addressing the limitations of conventional nucleating agents.
Implementation Method 1
a method of adding a crystal nucleating agent has been generally known. The crystal nucleating agent acts as a primary crystal nucleator of a crystalline polymer to promote crystal growth, and serves to make the crystallite size fine and increase the crystallization rate
Implementation Method 2
The crystal nucleating agent acts as a primary crystal nucleator of a crystalline polymer to promote crystal growth
Data Source
AI summary
A polyester resin composition containing 100 parts by mass of a polyester resin and 0.01 to 10 parts by mass of a 2-amino-1,3,5-triazine derivative of Formula [1]:a polyester resin molded body obtained by the composition, and a crystal nucleating agent including the triazine derivative. A polyester resin composition containing a crystal nucleating agent that makes it possible to produce, with high productivity, a polyester resin molded product that promotes polyester resin crystallization and maintains high transparency after crystallization and is applicable for a wide variety of uses can be provided.