Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1984-09-10
1985-12-17
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524864, 524588, 528 17, 528 18, 528 38, 427387, 428447, C08L 8300
Patent
active
045593850
ABSTRACT:
Aqueous emulsions for impregnating organic fibers, comprising, in addition to water and dispersants, (1) a diorganopolysiloxane having a Si-bonded hydroxyl group in each terminal unit and whose organic radicals are free of basic nitrogen atoms; (2) an organopolysiloxane containing diorganosiloxane units in which the two organic radicals are monovalent hydrocarbon radicals and also contains at least two monovalent SiC-bonded organic radicals per molecule having a basic nitrogen atom in which the organopolysiloxane is present in the emulsion in an amount of from 5 to 50 weight percent based on the weight of the diorganopolysiloxane (1); (3) an organosilicon compound selected from an organosilane containing at least two SiOC-bonded monovalent organic radicals consisting of carbon, hydrogen and possibly oxygen and/or partial hydrolyzates thereof, in which the organosilicon compound is present in the emulsion in an amount of from 2 to 6 weight percent based on the total weight of the diorganopolysiloxane (1) and organopolysiloxane (2); and (4) a condensation catalyst, which is present in an amount of from 0.2 to 1 weight percent based on the total weight of the diorganopolysiloxane (1) and organopolysiloxane (2).
These aqueous emulsions are prepared by mixing the organosilicon compound (3) with an emulsion of diorganopolysiloxane (1) and organopolysiloxane (2) and thereafter mixing the resultant mixture with the condensation catalyst (4).
REFERENCES:
patent: 3836371 (1974-09-01), Kokoszka
patent: 3876459 (1975-04-01), Burrill
Huhn Karl
Ullrich Kurt
Marquis Melvyn I.
Wacker-Chemie GmbH
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