C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/17
C08G 77/26 (2006.01)
Patent
CA 1333115
A process for preparing organopolysiloxanes contain- ing SiC-bonded organic radicals having a basic nitrogen which comprises reacting in a first step, a silane of the formula YSi(CH3)x(OR1)3-x in which R1 represents the same or different alkyl radicals having from 1 to 4 carbon atoms in each radical, and Y repre- sents a monovalent SiC-bonded organic radical having a basic nitrogen, and/or partial hydrolysates of the silane with an organo(poly)siloxane of the formula R3SiO(SiR2O)nSiR3 in which R represents the same or different, monovalent hydro- carbon radicals or monovalent fluorinated hydrocarbon radicals, and n is 0 or an integer having a value of from 1 to 100, in an amount of from 0.1 to 10 parts by weight per part by weight of the above silane and/or partial hydrolysates thereof, in the presence of a basic catalyst and in the absence of water, and in a second step, reacting the organopolysiloxane obtained in the first step, with water in order to hydrolyze groups of the formula -OR1, in which R1 is the same as above, to form silanol groups which are simultaneously and/or subsequently condensed with one another, and thereafter separating the product formed during the condensation from the alkanol and water, and optionally in a third step, reacting the product obtained from the second step with a cyclic organopolysiloxane of the formula (R2SiO)m in which R is the same as above and m is an integer having a value of from 3 to 12, and/or with an organopolysiloxane of ` the formula R3SiO(SiR2O)pSiR3 in which R is the same as above and p is 0 or an integer having a value of at least 1, in the presence of a basic catalyst.
550908
Braunsperger Karl
Gamon Norbert
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Schill & Seilacher (gmbh & Co.)
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