Filled PVC Composition with Ester-Linked Polymer Additive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The processing of highly filled polyvinyl chloride (PVC) compositions is challenging due to difficulties in achieving suitable plastification behavior and dispersion of inorganic solid particles, leading to increased preparation times and reduced mechanical properties.
Innovation Solution
A composition comprising polyvinyl chloride, inorganic solid particles, and a polymer with a polyether segment where at least 60 mol-% of the end groups are carboxylic acid or hydroxyl groups, linked via an ester group, is used to enhance mixing behavior and mechanical properties by applying shear force within a specific temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If higher levels of inorganic solid particles are used as filler in PVC, then cost is reduced, but processing difficulty increases and mechanical properties deteriorate
Solution Approach 1:
The patent introduces a specific polymer as an intermediary substance between the PVC matrix and inorganic filler particles. This polymer contains functional groups that interact with both the PVC and filler, improving dispersion and processing. The polymer acts as a mediator that enables higher filler loading (up to 90 wt%) while maintaining processability, resolving the contradiction between filler content and processing ease.
Solution Approach 2:
The patent modifies the chemical parameters of the polymer additive by specifying exact functional group compositions (carboxylic acid groups, hydroxyl groups, and ester groups in particular ratios). By changing these chemical parameters, the polymer's interaction with filler particles is optimized, enabling high filler content to be processed effectively. This parameter modification resolves the processing difficulty associated with high filler loading.
2Quantity of substance
If higher levels of inorganic solid particles are used as filler in PVC, then cost is reduced, but dispersion quality deteriorates
Solution Approach 1:
The polymer functions as a dispersing intermediary that coats and separates filler particles, preventing aggregation even at high concentrations (up to 90 wt%). The functional groups on the polymer chain interact with filler surfaces, ensuring uniform distribution throughout the PVC matrix. This intermediary action maintains high dispersion quality despite the large quantity of filler present.
Solution Approach 2:
The patent creates a composite system consisting of PVC, inorganic filler particles, and a specifically designed polymer additive. This composite structure allows the polymer to bridge the inorganic filler and organic PVC matrix, ensuring compatible interactions and uniform dispersion. The composite approach enables high filler content while maintaining manufacturing precision and dispersion quality.
3Quantity of substance
If higher levels of inorganic solid particles are used as filler in PVC, then cost is reduced, but mechanical properties deteriorate
Solution Approach 1:
The polymer acts as a mechanical intermediary that transfers and distributes stress between the rigid filler particles and the PVC matrix. By containing specific functional groups (carboxylic acid, hydroxyl, and ester groups), the polymer creates strong interfacial bonding that prevents stress concentration at filler-polymer interfaces. This intermediary function maintains mechanical strength even when filler content reaches 90 wt%, resolving the contradiction between filler quantity and mechanical properties.
Solution Approach 2:
The patent develops a composite material system where the polymer additive creates a tri-phase structure (PVC matrix, inorganic filler, and polymer intermediary). This composite architecture optimizes the mechanical performance by ensuring strong interfacial adhesion between components. The specific polymer composition (with defined functional group ratios) enhances stress transfer efficiency, maintaining mechanical properties at high filler loadings that would otherwise be structurally compromised.
4Ease of manufacture
If conventional processing additives are used for highly filled PVC, then processing is attempted, but plastification behavior becomes unsuitable
Solution Approach 1:
The patent fundamentally changes the chemical parameters of the processing additive by specifying exact functional group compositions. Instead of conventional additives, the patent uses a polymer with carboxylic acid groups (1-5 wt%), hydroxyl groups (0.5-2 wt%), and ester groups (2-10 wt%). This parameter modification transforms the plastification behavior, enabling suitable processing even at 90 wt% filler content where conventional additives fail.
Solution Approach 2:
The patent introduces a specially designed polymer as an intermediary processing aid that mediates between the inorganic filler particles and the PVC matrix during plastification. This polymer intermediary provides the necessary lubrication and flow characteristics during processing while maintaining composition stability. The functional groups on this intermediary polymer interact with both filler and matrix, enabling suitable plastification behavior that conventional additives cannot achieve at high filler levels.
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
This approach reduces preparation time, improves plastification behavior, and enhances the mechanical properties of the filled PVC blend, allowing for a higher percentage of inorganic solid particles, thus reducing costs while maintaining or improving performance.
Implementation Method 1
a polymer having a polyether segment, wherein at least 60 mol-% of the end groups of the polymer are selected from the group consisting of carboxylic acid groups and hydroxyl groups, and wherein at least a part of the end groups of the polymer is a carboxylic acid group, wherein the carboxylic acid end groups are linked to the polyether segment via a linking segment comprising an ester group
Implementation Method 2
subjecting the components a), b) and c), optionally including component d), to shear force in a temperature range of 80 to 200° C.
Data Source
AI summary
A composition is provided comprising: a) polyvinylchloride, b) inorganic solid particles, and c) a polymer having a polyether segment, wherein at least 60 mol-% of the end groups of the polymer are selected from the group consisting of carboxylic acid groups and hydroxyl groups, and wherein at least a part of the end groups of the polymer is a carboxylic acid group, wherein the carboxylic acid end groups are linked to the polyether segment via a linking segment comprising an ester group.