Ammonium Alkylphosphate Intermediate Transfer Members
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Solution Overview
Problem
Existing intermediate transfer members for xerographic systems are uneconomical due to high raw material and manufacturing costs, and they often require a separate release layer, which adds to the cost and time of preparation, and their coating solutions degrade quickly, leading to ineffective self-release characteristics.
Innovation Solution
An intermediate transfer member comprising a polyamideimide polymer and an ammonium alkylphosphate, optionally with a polysiloxane and conductive filler, which forms a stable mixture that self-releases from substrates without an external release layer, maintaining stability and properties for extended periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thermosetting polyimides are used for intermediate transfer members, then high modulus (about 3,500 MPa) is achieved, but raw material cost and manufacturing process cost increase
Solution Approach 1:
The patent changes the chemical composition parameters by using polyamideimide instead of polyimide, and incorporates phosphate esters as release agents. This substitution maintains the required mechanical properties (modulus) while reducing material cost and simplifying the manufacturing process by eliminating the need for separate release layers.
Solution Approach 2:
The patent creates a composite material system by combining polyamideimide with phosphate ester release agents. This composite approach achieves both structural integrity (high modulus) and release functionality in a single integrated material, eliminating the need for separate release layers and reducing overall manufacturing cost.
2Ease of operation
If a separate release layer is deposited on metal substrate, then self-release characteristics are achieved, but cost and preparation time increase
Solution Approach 1:
The patent merges the release agent function directly into the intermediate transfer member material by incorporating phosphate esters into the polyamideimide matrix. This integration eliminates the need for separate release layers on metal substrates, reducing both preparation time and cost while maintaining effective self-release characteristics.
Solution Approach 2:
The phosphate ester-containing polyamideimide provides self-release functionality inherently within the material structure. The release characteristics are built-in and automatic, eliminating the need for external release layers or additional preparation steps, thereby reducing both time and cost.
3Ease of operation
If phosphate esters are used for self-release characteristics, then initial effectiveness is achieved, but coating solution degrades gradually over short time periods
Solution Approach 1:
The patent optimizes the chemical parameters by selecting specific phosphate ester compounds and determining their optimal concentrations within the polyamideimide matrix. This parameter optimization enhances the chemical stability of the coating solution, preventing gradual degradation while preserving the self-release characteristics over extended storage periods.
Data Source
AI summary
An intermediate transfer member that includes a mixture of a polyamideimide, an ammonium alkylphosphate, an optional polysiloxane, and an optional conductive filler.