Oxidative age resistance of surface oxidized roller

Details Oxidative age resistance of surface oxidized roller Oxidative age resistance of surface oxidized roller

1997-11-26

1999-02-23

Nakarani, D. S.

Stock material or miscellaneous articles

Composite

Of polyamidoester

428 369, 428 3691, 4284258, 430110, 492 56, 492 59, B32B 2740

Patent

active

058741720

ABSTRACT:
An electrophotographic developer roller is made by casting urethane prepolymer mixed with a polybutadiene, a trifunctional curative, ferric chloride powder, and an antioxidant. After curing, the roller is baked, which oxidizes the outer surface. The oxidized surface layer is electrically resistive, which is desirable in a developer roller. An excellent developer roller is achieved at low production cost. The antioxidant provides stable electrical characteristics over extended time periods.

REFERENCES:
patent: 5248560 (1993-09-01), Baker et al.
patent: 5300339 (1994-04-01), Hays et al.
patent: 5434653 (1995-07-01), Takizawa et al.
patent: 5707743 (1998-01-01), Janes et al.
patent: 5804114 (1998-09-01), Janes et al.

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