METHOD FOR THE PRODUCTION OF A MAGNETIC LAYER ON A SUBSTRATE AND PRINTABLE MAGNETIZABLE VARNISH
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United States of America Patent
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Issued Date -
May 27, 2010
app pub date -
May 23, 2008
filing date -
Jun 5, 2007
priority date (Note) -
Abandoned
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Abstract
The current invention relates to a method for the production of a magnetic layer on a substrate, comprising the production of a printable varnish, containing 60 weight-% of neodym iron boron powder, 10 weight-% of ferrite powder, preferably strontium hexaferrite powder, 1.4 weight-% of a catalyst, 1.1 weight-% of a dispersing additive, and as the remainder a matrix, preferably an epoxy polyol matrix. These agents are mixed by means of stirring or kneading, and rolled in a three-roll mill. Preferably, they are applied to a substrate by screen printing, and subsequently pre-cured at 80 to 120° C. for six to twelve hours, and then cured at 200° C. to 220° C. for three hours.
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