Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1991-05-03
1992-03-24
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 31, 525478, C08G 7706
Patent
active
050989804
ABSTRACT:
A platinum catalyst composition having improved thermal stability, and all of the utilities of platinum catalyst compositions of the art, is provided by mixing certain organosiloxanes which contain aryl and alkenyl groups, such as 1,3-divinyl-1,3-diphenyldimethyldisiloxane, in a quantity of at least 2 moles, with a platinum complex having as a ligand an organosiloxane which contains alkyl and alkenyl groups, such as 1,3-divinyltetramethyldisiloxane (or a mixture of said platinum complex and said organosiloxane), in a quantity of 1 mole of platinum atoms. In a preferred embodiment the mixture is distilled in vacuo to remove part or all of the organosiloxane which contains alkyl and alkenyl groups, and most preferably to remove at least a portion of the complexed organosiloxane which contains alkyl and alkenyl groups.
REFERENCES:
patent: 3419593 (1968-12-01), Willing
patent: 3715334 (1973-02-01), Karstedt
patent: 3775452 (1973-11-01), Karstedt
patent: 4288345 (1981-09-01), Ashby
Saruyama Toshio
Takeda Hideko
Togashi Atshushi
Dow Corning Toray Silicone Company, Ltd.
Grindahl George A.
Marquis Melvyn I.
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