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UTILIZATION OF N-ETHYL PYRROIDINONE IN RAPID PENETRATING THERMAL INK JET DESIGN

IP.com Disclosure Number: IPCOM000027636D
Original Publication Date: 1998-Jun-30
Included in the Prior Art Database: 2004-Apr-08
Document File: 2 page(s) / 105K

Publishing Venue

Xerox Disclosure Journal

Abstract

N-Ethyl pyrrolidinone imparts penetrant properties on printing media such as plain office paper when present in ink jet inks. Because of its mild penetrant properties, concentrations of about 20 percent by weight were needed to achieve rapid penetration on papers such as Xerox@ Image Series Elite and to achieve medium penetration on papers such as Courtland 4024DP felt.

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XEROX DISCLOSURE JOURNAL

UTILIZATION OF N-ETHYL Proposed Classification

PYRROIDINONE IN RAPID PENETRATING THERMAL INK JET INK DESIGN
Richard L. Colt
Luis A. Sanchez
Kurt B. Gundlach
Maura A. Sweeney

U. S. C1. 106/020R Int. C1. C09d 11/00

N-Ethyl pyrrolidinone imparts penetrant properties on printing media such as plain office paper when present in ink jet inks. Because of its mild penetrant properties, concentrations of about 20 percent by weight were needed to achieve rapid penetration on papers such as Xerox@ Image Series Elite and to achieve medium penetration on papers such as Courtland 4024DP felt.

N-Octyl pyrrolidinone imparts potent penetrant properties on printing media such as plain oEce paper when present in ink jet inks in amounts of about 1 percent by weight. This
material is thus effective at lower loadings than comparable materials; for example, cyclohexylpynolidinone enables similar penetrant properties when present in ink jet inks in amounts of about 6 percent by weight. N-Octyl pyrrolidinone also has desirable environmental, health, and safety characteristics.

N-Octyl pyrrolidinone can exhibit a tendency to phase separate when present in aqueous inks. By incorporating N-ethyl pyrrolidinone into the ink along with the N-octyl pyrrolidinone, a homogeneous aqueous ink can be obtained. These ink ingredients are also compatible with polyquaternary conductive polymers, which are desirable ink ingredients. In a preferred embodiment, about 20 parts by weight of N-ethyl pyrrolidinone are present in the ink for every 1 part by weight of N-octyl pyrrolidinone.

EXPERIMENTAL

An ink composition was prepared by simple...