Polyarylene Sulfide Resin Composition for Coolant Systems
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Solution Overview
Problem
Current polyarylene sulfide (PAS) resin compositions used in automobile coolant systems lack long-term durability and hydrolysis resistance, particularly in high-temperature and corrosive environments, due to limitations in existing production processes and additives.
Innovation Solution
A resin composition comprising a polyarylene sulfide with low chlorine content, a mercapto silane coupling agent, and a hydrolysis-resistant additive such as para-phenylene-diisocyanate, combined with a filler, which enhances mechanical strength and thermal properties while improving hydrolysis resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PPS is produced by solution polymerization using sodium sulfide, then the polymerization process can be carried out, but by-products in salt form are produced that deteriorate the performance of electronic parts
Solution Approach 1:
The invention extracts and removes the harmful by-products (salt forms) from the polymerization process by using a different chemical reaction pathway (melt polymerization instead of solution polymerization), thereby eliminating the need for additional washing processes while maintaining polymerization efficiency
Solution Approach 2:
The invention changes the physical state parameter of the polymerization process from solution-based to melt-based, and changes the chemical reagents from sodium sulfide to elemental sulfur, which fundamentally alters the reaction products and eliminates salt by-products
2Object-generated harmful factors
If additional washing or drying processes are used to remove by-products and residual organic solvents, then the performance of electronic parts is improved, but the manufacturing process complexity increases
Solution Approach 1:
The invention extracts and eliminates the need for washing and drying processes by changing the polymerization method to melt polymerization, which does not produce salt by-products or require organic solvents, thereby simplifying the manufacturing process
Solution Approach 2:
The invention performs preliminary action by selecting a polymerization method that inherently prevents the formation of harmful by-products and residual solvents, eliminating the need for subsequent washing or drying steps
3Reliability
If PPS parts are used in automobile coolant systems, then the mechanical and chemical resistance is utilized, but the long-term durability in high-temperature and corrosive environments is insufficient
Solution Approach 1:
The invention changes the chemical composition parameters by introducing specific additives (hydrolysis-resistant additive and silane coupling agent) that modify the polymer's resistance to hydrolysis and thermal degradation, thereby extending durability in coolant environments
Solution Approach 2:
The invention creates a composite material system by combining PPS with hydrolysis-resistant additives and silane coupling agents, enhancing the base polymer's performance for long-term durability in high-temperature and corrosive coolant environments
4Ease of manufacture
If the chlorine content in polyarylene sulfide is not controlled, then the production process is simpler, but the hydrolysis resistance and working life in water contact environments are reduced
Solution Approach 1:
The invention changes the chemical purity parameter by controlling chlorine content to 300 ppm or less through selective use of raw materials and process conditions, achieving both ease of manufacture and improved hydrolysis resistance
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 composition exhibits improved working life and durability in water contact environments, maintaining mechanical and thermal properties, making it suitable for high-temperature applications and extending the property-retention period in harsh conditions.
Implementation Method 1
a mercapto silane coupling agent; a hydrolysis resistant additive, wherein the hydrolysis resistant additive is para-phenylene-diisocyanate
Implementation Method 2
exhibits excellent hydrolysis resistance and thus suitable for parts of an automobile coolant system
Implementation Method 3
high thermal resistance, chemical resistance, flame resistance and electric insulation
Implementation Method 4
excellent mechanical, electrical and thermal properties, and chemical resistance
Data Source
AI summary
The present invention relates to: a resin composition comprising a mercaptosilane coupling agent, a hydrolysis resistant additive, a filler, and a polyarylene sulfide having a chlorine content of 300 ppm or less; and a molded product manufactured by molding the resin composition. The resin composition of the present invention can be used in the manufacture of various molded products requiring hydrolysis resistance and durability, and particularly, can be used in parts of a car engine coolant system.