Polyolefin Resin Modifying Agent via Alicyclic Acid Surface Treatment
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Solution Overview
Problem
Conventional methods for enhancing the rigidity and heat resistance of polyolefin resin molded products, such as those used in automotive and electronic components, do not meet the increasingly stringent performance requirements.
Innovation Solution
A modifying agent for polyolefin resins is developed by surface-treating calcium-containing inorganic fillers with alicyclic dicarboxylic acids, forming a calcium salt on the filler surface, which significantly improves the nucleating agent effect and mechanical and thermal properties of the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional inorganic fillers (talc, calcium carbonate) are blended with polyolefin resin to increase rigidity and heat resistance, then the mechanical performance and heat resistance are improved, but the blending amount of filler must be increased to achieve higher performance, which increases weight and reduces effectiveness
Solution Approach 1:
The invention changes the chemical composition parameters of the crystal nucleating agent from conventional options (diacetal compounds, metal salts of phosphoric acid esters or carboxylic acids) to specific metal salts of 1,3-propanesultone or its derivatives. This parameter change in the chemical structure enables superior nucleating efficiency at lower concentrations, achieving higher heat resistance and rigidity with reduced filler content, thus reducing weight while maintaining or improving performance
Solution Approach 2:
The invention creates a composite modifying agent by combining crystal nucleating agents (metal salts of 1,3-propanesultone) with inorganic fillers (talc, calcium carbonate, or their combinations). This composite structure synergistically enhances both the nucleating effect and the reinforcement effect, allowing the system to achieve superior rigidity and heat resistance at lower total filler levels compared to using fillers alone, thereby reducing weight
2Reliability
If crystal nucleating agents are added to improve crystallinity and heat resistance, then the heat resistance and rigidity are improved, but the blending amount must be increased to achieve absolutely excellent performance, which complicates the composition and reduces efficiency
Solution Approach 1:
The invention changes the chemical parameter of the crystal nucleating agent to metal salts of 1,3-propanesultone or its derivatives, which possess inherently superior nucleating activity. This parameter change allows achieving absolutely excellent heat resistance and rigidity at very low blending amounts (0.01-5 parts by mass per 100 parts resin), eliminating the need for complex multi-component formulations and simplifying the overall composition while maintaining high reliability
3Strength
If inorganic filler is used to increase rigidity, then the rigidity is improved, but the blending amount must be increased to achieve higher rigidity, which increases viscosity and processing difficulty
Solution Approach 1:
The invention changes the chemical composition parameter to metal salts of 1,3-propanesultone as crystal nucleating agents, which promote efficient crystallization of polyolefin resin. This parameter change enables high rigidity to be achieved through enhanced crystallinity rather than increased filler loading, thereby maintaining lower viscosity and easier processability during molding while achieving superior rigidity in the final product
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 treated polyolefin resin compositions exhibit enhanced rigidity, heat resistance, and crystallization temperature, enabling thinner products with improved performance and allowing the use of general-purpose polyolefin resins in applications previously requiring more expensive materials.
Implementation Method 1
surface treatment of a calcium-containing inorganic filler with an alicyclic dicarboxylic acid... produces a modifying agent in which a calcium salt of the alicyclic dicarboxylic acid adheres to the surface of the inorganic filler
Implementation Method 2
such a modifying agent has an absolutely excellent nucleating agent effect on polyolefin resins... improve the crystallinity
Data Source
AI summary
This invention provides a modifying agent for polyolefin resins capable of providing, when blended with a polyolefin resin, a polyolefin resin molded article having absolutely excellent mechanical performance and heat resistance. The invention also provides a polyolefin resin composition comprising the modifying agent for polyolefin resins and having absolutely excellent mechanical performance and heat resistance, and a polyolefin resin molded article comprising the composition. The invention relates to a modifying agent for polyolefin resins, comprising a calcium-containing inorganic filler whose particle surface is treated with an alicyclic dicarboxylic acid represented by formula (1) and/or formula (2); a polyolefin resin composition comprising the modifying agent for polyolefin resins; and a polyolefin resin molded article comprising the composition. (In formula (1), R1 is a C1-C4 alkyl group, and R1 binds to the carbon at position 3 or 4 of a cyclohexane ring.) (In formula (2), R2 is a hydrogen atom or a C1-C4 alkyl group, and R2 binds to the carbon at position 3 or 4 of a cyclohexene ring.)