Patent TW-383319-B (TW)
Title: Functionalized polyorganosiloxanes and one of the processes for the preparation thereof
Inventor: GAY MICHEL
IPC: C08G77/392
Filed: 1995-11-15
Granted: 2000-03-01
Abstract: Functionalized polyorganosiloxane formed by a statistical sequenced or block linear copolymer of following average formula (IV) in which: the symbol Y is a linear or branched alkoxy radical chosen from methoxy, ethoxy and (iso)propoxy; the symbol W is a monovalent hydrocarbon radical having from 2 to 30 carbon atoms and constituting a functional residue, bonded to the silicon via an Si-C bond, this residue being chosen from the following groups: (i) a linear or branched alkyl group comprising from 8 to 30 carbon atoms; (ii) a linear or branched C6-C12 alkenyl group containing one double bond in the chain or at the chain end; (3i) an unsaturated aliphatic mono cyclic group containing 5 to 6 cyclic carbon atoms and one ethylenic double bond in the ring optionally substituted by one linear or branched C1-C3 alkykl group, the said cyclic group optionally being bonded to the silicon via a linear or branched C2-C6 alkylene radical; the symbol R is a monovalent hydrocarbon radical chosen from linear or branched alkys having from 1 to 6 atoms; the symbol Z is a monovalent radical chosen from the radicals formed from those having the same definitions as R, and Y; the sum m+n+p+q is between 3 and 100; 1<=m<=50; 1<=n<=50; 0<=p<=10; 0<=q<=20. Functionalized polyorganosiloxane consisting of a cyclic copolymer of following average formula (V) in which: the symbol Y is a linear or branched alkoxy radical chosen from methoxy, ethoxy and (iso)propoxy; the symbol W is a monovalent hydrocarbon radical having from 2 to 30 carbon atoms and consitituting a functional residue, bonded to the silicon via an Si-C bond, this residue being chosen from the following groups: (i) a linear or branched alkyl group comprising from 8 to 30 carbon atoms; (2i) a linear or branched C6-C12 alkenyl group containing one double bond in the chain or at the chain end; (3i) an unsaturated aliphatic mono cyclic group containing 5 to 6 cyclic carbon atoms and one ethylenic double bond in the ring optionally substituted by one linear or branched C1-C3 alkyl group, the said cyclic group optionally being bonded to the silicon via a linear or branched C2-C6 alkylene radica;, the symbol R is a monovalvent hydrocarbon radical chosen from linear or branched alkys having from 1 to 6 atoms, and with r, s, t and u representing positive whole or decimal numbers; the sum r+s+t+u is between 3 and 8; +1<=r<=4; +1<=s<=4; +0<=t<=4; +0<=u<=4. Process for the preparation of functionalized polylorganosiloxane of formula (IV), wherein it consists essentially in (A) reacting a starting polyorganosiloxane of the following average formula (VI) in which the R symbols are identical or different and are as defined in the above; the Z' symbols are identical or different and have the same definitions as R; v is an integer or a decimal >=0 definable as follows: v=n+m+q; n, m and q have the same definitions as those recited in the above; w has the same definitions as that of p accordance with claim 3, with at least one alcohol of formula YH from which the functionality Y of the formula (IV) derives, which is useful as reactant and as reaction solvent, in the presence of a catalyst, at least one of the active elements of which is chosen from the transition metals, according to a dehydrogenation/condensation mechanism (1st stage), and in (B) carrying out the addition of the polyorganosiloxane which has been converted by dehydrogenation/condensation to at least one olefinic compound, from which the functionality W of the formula (V) derives, according to a hydrosilylation mechanism (2nd stage), in the presence of a catalyst and at a temperature of between 20 and 70 degree C. Process for the preparation of functionalized polyorganosiloxane of formula (V), wherein it consists essentially in (A) reacting a starting polyorganosiloxane of the following average formula (VII): in which the R symbols are identical or different and are as defined in the above; o has the same definition as that of u; y is an integer or a decimal >=0 definable as follows: y=r+r+t and Y+o is between 3 and 8, r,s and t has the same definition as those recited in the above, with at least one alcohol of formula YH from which the functionality Y of the formula (IV) derives, which is useful as reactant and as reaction solvent, in the presence of a catalyst, at least one of the active elements of which is chosen from the transition metals, according to a dehydrogenation/condensation mechanism (1st stage), and in (B) carrying out the addition of the polylorganosiloxane which has been converted by dehydrogenation/condensation to at least one olefinic compound, from which the functionality W of the formula (V) derives, according to a hydrosiliylation mechanism (2nd stage), in the presence of a catalyst and at a temperature of between 20 and 70 degree C.