Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1996-03-28
1997-10-21
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523209, 524714, 524730, 524837, C08K 906
Patent
active
056797273
ABSTRACT:
A platinum curing organosiloxane composition having improved hysteresis characteristics when cured. The composition requires the presence of a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 20 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms and a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 0.1 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C., where from 1 to 5 percent of the non-terminal repeating units of the siloxane comprise a vinyl radical. In addition, the present composition comprises 10 to 30 weight percent of a reinforcing silica filler that has been treated with hexamethyldisilazane and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an organohydrogen siloxane crosslinker comprising at least ten silicon-bonded hydrogen atoms per molecule.
REFERENCES:
patent: 4753978 (1988-06-01), Jensen
Griffith Phillip Joseph
Ho Chu Yat
Jensen Jary David
Kosal Diane Marie
Boley William F.
Dow Corning Corporation
Dow Corning Taiwan, Incorporated
Marquis Melvyn I.
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