Appeal No. 1999-2153
Application No. 08/958,848
solid thermally conductive filler, and a dispersant which is a
polyester self-condensation reaction product of a hydroxy fatty
acid or a mixture of hydroxy fatty acids, the reaction product
having an acid no. of about 45-85. According to the appellants,
the use of a polyester self-condensation reaction product having
an acid number within the aforementioned range results in a paste
which possesses the desirable combined properties of high thermal
conductivity and relatively low paste viscosity. The appealed
subject matter also relates to a method of using such a paste and
to a method of making such a paste. This subject matter is
adequately represented by independent claim 1 which reads as
follows:
1. A thermally conductive paste having enhanced
thermal conductivity and paste properties comprising:
a non-aqueous dielectric liquid carrier;
a solid thermally conductive filler in an amount of
about 50-85% by volume of the paste dispersed in the liquid
carrier; and
a dispersant which is a polyester self-condensation
reaction product of a hydroxy fatty acid or mixture of
hydroxy fatty acids the reaction product having an Acid No.
of about 45-85 in an amount of about 1 to 10 weight % of the
paste.
2
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