Browse Prior Art Database

PREPARATION OF PHOTOGENERATOR SPECIES IN ION EXCHANGE RESINS

IP.com Disclosure Number: IPCOM000023557D
Original Publication Date: 1978-Feb-28
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 285K

Publishing Venue

Xerox Disclosure Journal

Abstract

In the preparation of xerographic photoreceptors it is advan-tageous to direct and control the physical form of the photo-reactive species. There is described a method for localizing in a polymer matrix deposits of selenium and tellurium as well as their mixtures, compounds and heavy metal salts. Generally, the method involves localizing ions of the components of a precipitation reaction in an ion exchange resin, removing all mobile ions by washing and then carrying out the precipitation at or near the ion binding site within the polymer matrix by addition of a suitable second reagent.

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~ROX DISCLOSURE JOURNAL

PREPARATION OF PHOTOGENERATOR Proposed Classification
SPECIES IN ION EXCHANGE RESINS U.S. Cl. 96/1.5
Wolfgang H.H. Gunther Int. Cl. G03g 5/04

In the preparation of xerographic photoreceptors it is advan-
tageous to direct and control the physical form of the photo-
reactive species. There is described a method for localizing
in a polymer matrix deposits of selenium and tellurium as well
as their mixtures, compounds and heavy metal salts.
Generally, the method involves localizing ions of the
components of a precipitation reaction in an ion exchange
resin, removing all mobile ions by washing and then carrying
out the precipitation at or near the ion binding site within
the polymer matrix by addition of a suitable second reagent.

In one embodiment of the method Dowex 1 X 8, a strongly basic
ion exchange resin containing R-CH

                             2N(CH3)3~groups (where R
represents a crosslinked polystyrene moiety) , 20-50 mesh size,
exchange capacity 1.3 rneq/ml wet bed and 3.9 meq/g dry resin,
obtained as Baker Analyzed Reagent was converted into its
selenite salt form by treatment with an aqueous solution of
selenious acid H SeO . The beads were then washed free of
selenious acid an~ot~er ions, resuspended in water at~'~160°C
and reduced by addition of excess hydrazine hydrochloride.
Following this treatment, the beads were washed with water and
acetone, and dried in a stream of air. The product was deep
red and transparent under a low power microscope. The red
color was apparent thr...