Stock material or miscellaneous articles – Composite – Of polyamidoester
Reexamination Certificate
2005-07-20
2010-02-02
Tran, Thao T. (Department: 1794)
Stock material or miscellaneous articles
Composite
Of polyamidoester
C428S369000, C428S906000, C528S065000, C528S075000
Reexamination Certificate
active
07655311
ABSTRACT:
This invention employs a polyol derivative of a fatty acid that is reacted into a polyurethane formed also with a urethane prepolymer, a polydiene, and optionally, a curative for cross-linking. The fatty acid moiety becomes a relatively short side chain of the polyurethane formed. In embodiments, the polyol is an ester of the fatty acid. This achieves reduction in hardness of the polyurethane with a homogeneity that provides consistent surface characteristics over an extended period desirable for use for electrophotographic development and the like when the material is used as a developer roller.
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Lexmark International Inc.
Tran Thao T.
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