Appeal No. 95-0432
Application 08/002,448
The present invention provides techniques, methods,
and additive combinations which permit the integral
blending of additives for filler/polymer composites for
the enhancement of physical properties such as impact
strength, tensile strength, etc. The present invention
provides novel methods for reinforcing thermoplastic
organic polymers such as polyethylene and polypropylene
by blending the polymer, a finely divided filler and a
surfactant which is a siloxane-polyoxyalkylene block
copolymer or a siloxane containing at least one silicone
bonded alkyl group of 12 or more carbon atoms or a
polyoxyalkylene compound containing polyoxyalkylene
blocks terminated at one end by an alkyl group having 12
or more carbon atoms or an alkenyl group and terminated
at the other end by an alkoxy group or a hydroxy group.
According to this invention, the novel method also
includes
the incorporation of an unsaturated silicon compound
containing at least one polymerizable unsaturated group,
at least one /SiO-group and not more than 5 silicon
atoms,
e.g. a polymerizable unsaturated hydrolyzable silane
coupling agent and/or an unsaturated organic compound
containing two or more polymerizable unsaturated groups
into the filler/-polymer mixture to provide synergistic
enhancement of the filled polymer physical properties.
The surfactants Godlewski prefers are polysiloxane-
polyalkyleneoxyalkylene block copolymers (col. 6, l. 38-39).
Nevertheless, Godlewski teaches that polysiloxane-polyalkylene
block copolymer surfactants, i.e., siloxanes containing at
least one silicon bonded alkyl group of 12 or more carbon
atoms,
are useful in the invention (col. 5, l. 31-45). At column 6,
line 57, to column 7, line 13, Godlewski lists polymeric
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Last modified: November 3, 2007