Phenolic Resin Composition with Ionic Groups for Abrasive Articles
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Solution Overview
Problem
Phenolic resin compositions used in abrasive articles face challenges in achieving optimal complex viscosity and tan delta properties at elevated temperatures, which affect the adhesion and retention of abrasive particles, leading to processing issues such as high energy requirements for solvent removal and viscosity-related problems.
Innovation Solution
A phenolic resin composition comprising at least 50 wt.% of phenolic resin with ionically bonded cationic and anionic groups, specifically cationic and anionic polymerized units, which are incorporated to achieve desired complex viscosity and tan delta properties, allowing for improved adhesion and retention of abrasive particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phenolic resin compositions are used in abrasive articles, then adhesion and retention of abrasive particles can be improved, but complex viscosity and tan delta properties deteriorate at elevated temperatures
Solution Approach 1:
The patent modifies the chemical composition parameters of the phenolic resin by incorporating polymerized units with cationic and anionic groups. This changes the molecular structure and intermolecular interactions, thereby adjusting the temperature-dependent viscosity and tan delta properties while maintaining adhesion and retention characteristics.
Solution Approach 2:
The invention creates a composite phenolic resin system by combining phenolic resin with polymerized units containing oppositely charged groups. This composite structure leverages the synergistic effects of ionic interactions to achieve improved thermal stability and controlled rheological properties at elevated temperatures.
2Reliability
If solvent removal is performed to achieve desired resin properties, then adhesion improves, but energy requirements increase
Solution Approach 1:
The patent changes the compositional parameters of the resin system by adding polymerized units with ionic groups. These modifications alter the resin's interaction with solvents and its curing behavior, enabling adequate adhesion properties to be achieved with reduced solvent removal requirements and lower energy consumption.
3Reliability
If viscosity is increased to improve particle retention, then adhesion improves, but processing difficulty increases
Solution Approach 1:
The invention adjusts the rheological parameters of the phenolic resin composition by incorporating polymerized units with cationic and anionic groups. The ionic interactions provide temperature-dependent viscosity control, allowing the resin to maintain appropriate flow characteristics during processing while achieving desired particle retention at service temperatures.
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 achieves enhanced complex viscosity and reduced tan delta at elevated temperatures, ensuring effective penetration and adherence of abrasive particles, thereby improving the performance and processing of abrasive articles.
Implementation Method 1
The cationic groups are ionically bonded to the anionic groups
Data Source
AI summary
A phenolic resin composition is described comprising at least 50 wt.-% of phenolic resin; first polymerized units comprising a cationic group; and second polymerized units comprising an anionic group. The cationic groups are ionically bonded to the anionic groups. The ionic bonding of the cationic group and anionic group of the polymerized units can provide certain complex viscosity and/or tan delta properties. In some embodiments, the phenolic resin composition has a complex viscosity at 65 C of at least 50 Pascal(seconds) and/or has a tan delta at 65 C ranging from 0.5 to 2.5. Abrasive articles and methods of making an abrasive article are also described.