Color developer compositions for carbonless paper copying systems
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
May 27, 1994
filing date -
May 28, 1993
priority date (Note) -
Expired
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Abstract
There is disclosed a coating composition for the preparation of a CF sheet (i.e. a receiving sheet) of a carbonless paper copying system comprising a CF sheet and a CB sheet (i.e. a donating sheet). The coating composition comprises a color developer and an extender, wherein the extender comprises a particulate inorganic material which has been modified by treatment with a treating agent which has (i) a non-polar hydrophobic portion comprising at least one hydrocarbon group having a chain length of from 8 to 30 carbon atoms and (ii) a polar portion which is capable of binding with sites on the surface of the pigment particles.
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