Vinyl Chloride Resin Composition for Low-Temperature Elongation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vinyl chloride resin compositions used in forming automobile interior components, such as instrument panels, lack sufficient low-temperature tensile elongation, which is crucial for ensuring durability and performance in varying environmental conditions.
Innovation Solution
A vinyl chloride resin composition comprising a polyester plasticizer with a number-average molecular weight of less than 8,000 and a polyester resin with a number-average molecular weight of 8,000 or more, along with specific structural units and proportions, enhances low-temperature tensile elongation and improves powder fluidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vinyl chloride resin composition containing a polyester plasticizer is used, then the resin can be molded into automobile interior components, but the low-temperature tensile elongation is insufficient
Solution Approach 1:
The patent applies parameter changes by carefully controlling the number-average molecular weights of two key components: the polyester plasticizer (less than 8,000) and the polyester resin (8,000 or more). This specific parameter control allows the composition to achieve both excellent low-temperature tensile elongation and good moldability, resolving the technical contradiction between reliability and ease of manufacture
Solution Approach 2:
The patent uses a composite material approach by combining vinyl chloride resin with both polyester plasticizer and polyester resin in specific proportions. This composite system leverages the complementary properties of each component: the polyester plasticizer provides flexibility and low-temperature elongation, while the polyester resin maintains structural integrity and moldability, together achieving superior overall performance
2Reliability
If the molecular weight of polyester plasticizer is reduced to improve low-temperature tensile elongation, then elongation performance improves, but powder fluidity may deteriorate
Solution Approach 1:
The patent applies parameter changes by setting the number-average molecular weight of the polyester plasticizer to less than 8,000, which improves low-temperature tensile elongation. Simultaneously, the polyester resin with molecular weight of 8,000 or more compensates for any potential loss in powder fluidity, achieving a balanced optimization of both parameters
Solution Approach 2:
The polyester resin acts as an intermediary component that mediates between the polyester plasticizer and the vinyl chloride resin. By controlling its molecular weight at 8,000 or more, it maintains powder fluidity and processability while allowing the lower molecular weight polyester plasticizer to effectively improve low-temperature tensile elongation
Data Source
AI summary
Provided is a vinyl chloride resin composition that is capable of forming a vinyl chloride resin molded product having excellent low-temperature tensile elongation. The vinyl chloride resin composition contains a vinyl chloride resin, a polyester plasticizer having a number-average molecular weight of less than 8,000, and a polyester resin having a number-average molecular weight of 8,000 or more. The vinyl chloride resin composition is preferably used in powder molding.