Process and agent for cross-linking organopolysiloxanes

Details Process and agent for cross-linking organopolysiloxanes Process and agent for cross-linking organopolysiloxanes

1987-02-10

1988-05-10

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

502160, 528 32, 528 43, C08G 7706

Patent

active

047436719

ABSTRACT:
The present invention provides a process for cross-linking organopolysiloxanes by means of a bis-benzoyl peroxide derivative with heating, wherein, as bis-benzoyl peroxide derivative, there is used at least one compound of the general formula: ##STR1## in which the symbols R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5, each independently of one another, have the following meanings: R.sup.1 and R.sup.5 are the same or different and signify alkoxycarbonyl radicals with 2 to 4 carbon atoms in the alkyl moiety or fluorine or hydrogen atoms, R.sup.2 and R.sup.4 are the same or different and signify alkyl radicals with 2 to 8 carbon atoms or hydrogen atoms and R.sup.3 signifies an alkyl radical with 1 to 8 carbon atoms or a hydrogen atom, at least 2 symbols and at most 4 symbols per benzene ring signifying hydrogen atoms.
The present invention also provides an agent for carrying out this process which consists essentially of silicone oil in which is contained, in finely divided form, 10 to 80% by weight of at least one compound of general formula (I).

REFERENCES:
patent: 3183206 (1965-05-01), Kniege et al.
patent: 3231542 (1966-01-01), Eisinger et al.
patent: 4202790 (1980-05-01), Stellar
patent: 4560495 (1985-12-01), Kato
patent: 4647641 (1987-03-01), Westbrook
Ullmann's Encyklopadie der technischen Chemie, vol. 21, 1982.

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