Browse Prior Art Database

IMPROVED RELEASE AGENTS FOR FUSERS IN ELECTROSTATIC COPIERS

IP.com Disclosure Number: IPCOM000023605D
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 548K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to a thermo-oxidative stable hydrocar-bon release agent and a method for making said release agent for releasing toner from bare metal fuser rolls. It is well known in the art that toner particles can be fused to a substrate by contacting the toner particles upon the sub-strate with a heated, bare metal fuser member bearing a coating of a polymer release material. For example, in U.S. Patent 3,937,637, there is described a fuser roll structure for fusing toner images to a substrate wherein the toner images contact a rigid, thermally conductive core of a high surface energy material, such as glass or metal, having a coating of a polymer release material on the core, the polymer release material being the type which oxidizes and is capable of reacting with the core surface material. Polyethylene is one of the preferred polymer release materials.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 51% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

IMPROVED RELEASE AGENTS FOR Proposed Classification
FUSERS IN ELECTROSTATIC COPIERS U.S. Cl. 148/6
Thomas R. Hoffend tnt. Cl. C23f 7/00
Donald A. Seanor
Steven Strella

This disclosure relates to a thermo-oxidative stable hydrocar-
bon release agent and a method for making said release agent
for releasing toner from bare metal fuser rolls.

It is well known in the art that toner particles can be fused
to a substrate by contacting the toner particles upon the sub-
strate with a heated, bare metal fuser member bearing a
coating of a polymer release material. For example, in U.S.
Patent 3,937,637, there is described a fuser roll structure
for fusing toner images to a substrate wherein the toner
images contact a rigid, thermally conductive core of a high
surface energy material, such as glass or metal, having a
coating of a polymer release material on the core, the polymer
release material being the type which oxidizes and is capable
of reacting with the core surface material. Polyethylene is
one of the preferred polymer release materials.

It is also well known that carboxylic acids incorporated into
hydrocarbons increase the adhesion of hydrocarbons to metals.
For instance, fatty acids provide improved lubrication due to
attachment of the carboxyl group to metal surfaces and the
associated alignment of the hydrocarbon chains.

In accordance with the present disclosure, it has been found
that the incorporation of carboxylic acids into a hydrocarbon
release agent or mixture of hydrocarbon release agents
improves the toner release capability of the hydrocarbon
release agent. However, one of the main disadvantages of the
use of carboxylic acids in hydrocarbon release agents is the
increase in the rate of hydrocarbon thermo-oxidation, which
reduces the stand-by stability of the release agent.

In general, it was found that the incorporation of anti-
oxidants into a hydrocarbon release agent (without the
attached carboxylic acid groups) caused the toner release ca-
pability of the release agent to decrease; that is, hot offset
occurs at a lower temperature even though the thermo-oxidative
stability of the release agent improves. Accordingly, it has
been discovered that when the release agent is prepared by

Volume 3 Number 3 May/June 1978 153

[This page contains 1 picture or other non-text object]

Page 2 of 2

IMPROVED RELEASE...