Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1981-03-23
1982-11-23
Briggs, Sr., Wilbert J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
523209, 523210, 524492, 524493, 524588, 525477, C08K 336, C08L 8306
Patent
active
043606105
ABSTRACT:
A new method of producing a silicone rubber composition yields a unique composition. When the composition is further mixed with extending filler and vulcanized, the tensile strength of the vulcanized silicone rubber is improved over that obtained when the composition is not produced following the method of this invention. The method mixes polydiorganosiloxane gum, treated reinforcing silica filler, a portion of hydroxylated organosilicon compound having an average of from 1 to 20 percent by weight hydroxyl radicals and an average of from 1 to 31 percent by weight vinyl radicals; heating the mixture; then cooling and admixing another portion of the hydroxylated organosilicon compound.
REFERENCES:
patent: 2890188 (1959-06-01), Konkle et al.
patent: 3268473 (1966-08-01), Brown
patent: 3696068 (1972-10-01), Creamer
patent: 4052357 (1977-10-01), Marinik
Donatelli Joan M.
Murray Milton C.
Borrousch Roger H.
Briggs Sr. Wilbert J.
Dow Corning Corporation
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