Rigid magnetic recording media
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United States of America Patent
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Jun 24, 1986
Grant Date -
N/A
app pub date -
Feb 11, 1985
filing date -
Feb 11, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rigid magnetic storage media coating composition using a high concentration of magnetic particles includes a dual thermoset binder system. The two polymers forming the dual binder system cure during mutually exclusive temperature ranges to form polymer networks that are interpenetrated and entangled. The thermoset polyurethane-melamine/polyester polymer binder system possesses improved properties including the ability to retain liquid fluorinated polyether lubricant without spin-off. The addition of a small amount of silicone wax to the uncured coating composition enhances composition rheology during spin coating on a rigid substrate.
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