Page 196 - Handbook of Surface Improvement and Modification

11.3 Application data 191

11.3 APPLICATION DATA

The release coating composition having low coefficient of friction includes: an epoxy
functional polyorganosiloxane (dialkyl epoxysiloxy chain-stopped polydialkyl-alkylepoxy
siloxane); a fine particle silicone resin (highly crosslinked silicone resin obtained by a
controlled hydrolysis crosslinking of methyltrimethoxysilane which results in a resin with
a network structure in which siloxane bonds extend three-dimensionally, having a particle
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size of 0.5-12 μm); and a photoinitiator.
A solventless silicone release composition having a reduced coefficient of friction
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and improved slip characteristics. The composition contains a mixture of organopolysi-
loxane of wide-ranging viscosity having unsaturated terminal groups, crosslinkable poly-
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mer, and catalyst.
The drag sled quantifies the coefficient of friction using the equation F=μN, where F
is the longitudinal force required to pull the drag sled, μ is the coefficient of friction, and N
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is the normal force or weight of the drag sled. The drag sled is made to move relative to
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a substantially horizontal test surface. A load cell measures the longitudinal force F
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required to move the drag sled relative to the test surface. The drag sled is then removed
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from the test surface and hung vertically from a hook. Hanging the drag sled allows the
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drag sled's weight N to be measured. From these two measurements, the coefficient of
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friction μ can be calculated. The test was developed to measure a quality of road surface
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used for testing tires. The method of determines the coefficient of friction between the
road surface and the tire based on the level of braking at the time the vehicle substantially
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lost traction.
Polyesters and polyester containers having a reduced coefficient of friction and
improved clarity are produced using an antiblock agent comprising a dried talc having
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from about 20 to about 300 ppm water or a fatty acid tethered talc. The use of these talcs
results in polyesters and polyester containers having a coefficient of less than 1 and a clar-
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ity with haze values of less than 4%.
A polymerizable monomer adhesive composition includes a 1,1-disubstituted ethyl-
ene monomer and at least one slip additive, where the slip additive causes a polymer film
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formed from the monomer to have a lower coefficient of friction. The slip additive can
be selected from fluorinated monomers or polymers, fluorinated additives, siloxane-con-
taining monomers or polymers, siloxane-containing additives, fluorinated siloxanes, and
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long chain fatty acid esters. The slip additive can also form a second phase in a resultant
polymer film, where the second phase is soluble in the monomer but is insoluble or sub-
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stantially insoluble in the polymer.
A functional amine release agent displaying reduced coefficient of friction as com-
pared to standard silicone oils comprises a polydimethylsiloxane oil and a functional
amine selected from the group consisting of pendant propylamines and pendant N-(2-
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aminoethyl)-3-aminopropyl. The concentration of functional amine to polydimethylsi-
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loxane oil is approximately less than 0.0001 meq/g. According to certain embodiments,
the functional amine release agent is operable to impart a coefficient of friction of about
0.5 or more to the print media, resulting in improved finishing and converting equipment
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interaction. The release agent may have a viscosity of about 50 cSt.
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A method of reducing the coefficient of friction of gaskets. The method comprises
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coating the gasket with a curable silicone composition. The composition contains a cur-