Process of making a polyurethane roller with high surface resist

Plastic and nonmetallic article shaping or treating: processes – Reactive gas or vapor treatment of work

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264104, 427 58, 427 74, 427162, 427400, C04B 4000, C04B 3500, B05D 512, B05D 506

Patent

active

058041141

ABSTRACT:
An electrophotographic developer roller is made by casting urethane prepolymer mixed with a butadiene, a trifunctional curative and ferric chloride powder. 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.

REFERENCES:
patent: 4058879 (1977-11-01), Lentz et al.
patent: 5248560 (1993-09-01), Baker et al.
patent: 5434653 (1995-07-01), Takizawa et al.
patent: 5496496 (1996-03-01), Kajita et al.

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