Stock material or miscellaneous articles – Composite – Of epoxy ether
Patent
1988-12-15
1990-12-25
Hoke, Veronica P.
Stock material or miscellaneous articles
Composite
Of epoxy ether
428418, 525 65, 525 97, 525122, 528 97, C08L 6300
Patent
active
049802348
ABSTRACT:
A method of improving epoxy resin compositions to provide a cured resin having improved glass transition temperature and toughness characteristics is provided. The method includes providing in an epoxy resin composition an effective amount of a substituted fluorene unit in the composition. The fluorene component acts as a chain extension agent and provides for increased glass transition temperature and less cross-link density. As a result, improved toughness occurs. In preferred applications a toughening agent is provided in the resin composition, to further enhance toughness. Preferred resin compositions, cured resins and methods of providing improved cured resins are also provided.
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Almer Carl J.
Schultz William J.
Hoke Veronica P.
Minnesota Mining and Manufacturing Co.
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