Appeal No. 2006-0916
Application No. 10/345,711
water.” (Column 9, line 19 to column 10, line 2.) With respect
to the auxiliary substances or additives, Markusch discloses (as
one class of suitable substances) “water and low-molecular
weight organic compounds which have molecular weights of up to
about 400,” including polyhydroxyl compounds (polyols). (Column
10, line 25 to column 12, line 48.) The proportion by weight of
the polyisocyanate to the particulate or fibrous material is
said to be between 1:99 and 90:10. (Column 15, lines 41-45.)
Regarding the process of making the composite, Markusch
teaches:
The production of the composite materials may be
carried out, for example, by mixing the above
described components either in one stage or in several
stages in an intermittently or continuously operating
mixing apparatus and then leaving the resulting
mixture to react, in most cases outside the mixing
apparatus in molds or on suitable substrates. If only
small quantities of the polyisocyanate with ionic
groups are used as binder, based on the quantity of
inorganic and/or organic particulate and/or fibrous
material which is required to be bonded, it is often
advantageous to use a procedure in which the binder
components are sprayed, scattered, spread-coated or
rolled on to the particulate and/or fibrous material
and the component mixture is then hardened after the
shaping process, optionally at an elevated
temperature.
The processing temperatures used may be between
0°C and 300°C but are preferably between 5°C and
150°C. According to one preferred procedure, the
components are combined at room temperature and then
bonded at room temperature or elevated temperature,
optionally under pressure. If desired, the mixture of
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