Process for preparing functionalized polyorganosiloxane resins by redistribution in the presence of triflic acid and/or of at least one derivative thereof and of a nonbasic filler

The process for preparing functionalized polyorganosiloxane (POS) resins comprising units M:

• (R3SiO1/2), Q:
• (SiO4/2) and M′:
• (YaR3-aSiO1/2) and optionally D:
• (R2SiO2/2) and/or D′:
• (RYSiO2/2) and T:
• (RSiO3/2) and/or T′:
• (YSiO3/2), wherein:
• the radicals R, which are identical or different, represent C1-C10 alkyl or C8-C12 aryl;
• and
• the radicals Y, which are identical or different, represent a functional group Y selected from the group consisting of hydrogen, alkenyl, alkynyl, aryl, (alkyl)epoxy, ether, polyether, carboxylic acid, amide, amine, halide, alcohol, thiol and other sulfur derivative;
• said process comprising conducting a redistribution reaction between a POS resin and a POSf compound bearing functional units M′ and/or D′ and/or T′, as defined above, in the presence of an acid catalyst, wherein:
• at least one catalyst has formula (I) below:
• (CmF2m+1SO2)nA (I)
• wherein:
• m is an integer greater than or equal to 1;
• n is an integer equal to 1 or 2 and A represents OH, NH2 or NH with:
• (i) n=1 and A=OH;
• or
• (ii) n=1 and A=NH2 or NHR with R being a radical of SO2-Z type, with Z being a group other than CmF2m+1;
• or
• (iii) n=2 and A=NH;
• and wherein said catalyst is in the presence of a nonbasic inert filler;
• said process comprising the following essential steps:
• (1) combining the starting POS resin, the POSf bearing functional units, the acid catalyst (I) and the nonbasic inert filler in an organic solvent;
• (2) reacting at a temperature θr greater than or equal to room temperature and less than or equal to the boiling point of the solvent;
• (3) optionally quenching the reaction by adding an agent for neutralizing the acid catalyst (I);
• and
• (4) removing the inert filler from the reaction medium;
• wherein the redistributed and functionalized resin obtained is subjected to at least one other redistribution/functionalization, using POSfs bearing functional units.

A process for preparing functionalized polyorganosiloxane (POS) resins comprising units M:

• (R3SiO1/2), Q:
• (SiO4/2) and M′:
• (YaR3-aSiO1/2) and optionally D:
• (R2SiO2/2) and/or D′:
• (RYSiO2/2) and T:
• (RSiO3/2) and/or T′:
• (YSiO3/2), wherein:
• the radicals R, which are identical or different, represent C1-C10 alkyl or C8-C12 aryl;
• and
• the radicals Y, which are identical or different, represent a functional group Y selected from the group consisting of hydrogen, alkenyl, alkynyl, aryl, (alkyl)epoxy, ether, polyether, carboxylic acid, amide, amine, halide, alcohol, thiol and other sulfur derivative;
• said process comprising conducting a redistribution reaction between a POS resin and a POSf compound bearing functional units M′ and/or D′ and/or T′, as defined above, in the presence of an acid catalyst, wherein:
• at least one catalyst has formula (I) below:
• (CmF2m+1SO2)nA (I)
• wherein:
• m is an integer greater than or equal to 1;
• n is an integer equal to 1 or 2 and A represents OH, NH2 or NH with:
• (i) n=1 and A=OH;
• or
• (ii) n=1 and A=NH2 or NHR with R being a radical of SO2-Z type, with Z being a group other than CmF2m+1;
• or
• (iii) n=2 and A=NH;
• and wherein said catalyst is in the presence of a nonbasic inert filler;
• wherein Y═H or alkenyl in the functional units M′ and/or D′ and/or T′ of the POSf, and wherein, after the redistribution, other functionalization radicals Y1 bearing at least one unsaturation or at least one Si—H unit are grafted by hydrosilylation onto the ≡Si—H or ≡Si-alkenyl units, respectively, of the redistributed resin;
• wherein the redistributed and functionalized resin obtained is subjected to at least one other redistribution/functionalization, using POSfs bearing functional units.

A process for preparing functionalized polyorganosiloxane (POS) resins comprising units M:

• (R3SiO1/2), Q:
• (SiO4/2) and M′:
• (YaR3-aSiO1/2) and optionally D:
• (R2SiO2/2) and/or D′:
• (RYSiO2/2) and T:
• (RSiO3/2) and/or T′:
• (YSiO3/2), wherein:
• the radicals R, which are identical or different, represent C1-C10 alkyl or C8-C12 aryl;
• and
• the radicals Y, which are identical or different, represent a functional group Y selected from the group consisting of hydrogen, alkenyl, alkynyl, aryl, (alkyl)epoxy, ether, polyether, carboxylic acid, amide, amine, halide, alcohol, thiol and other sulfur derivative;
• said process comprising conducting a redistribution reaction between a POS resin and a POSf compound bearing functional units M′ and/or D′ and/or T′, as defined above, in the presence of an acid catalyst, wherein:
• at least one catalyst has formula (I) below:
• (CmF2m+1SO2)nA (I)
• wherein:
• m is an integer greater than or equal to 1;
• n is an integer equal to 1 or 2 and A represents OH, NH2 or NH with:
• (i) n=1 and A=OH;
• or
• (ii) n=1 and A=NH2 or NHR with R being a radical of SO2-Z type, with Z being a group other than CmF2m+1;
• or
• (iii) n=2 and A=NH;
• and wherein said catalyst is in the presence of a nonbasic inert filler;
• said process comprising the following essential steps:
• (1) combining the starting POS resin, the POSf bearing functional units, the acid catalyst (I) and the nonbasic inert filler in an organic solvent;
• (2) reacting at a temperature θr greater than or equal to room temperature and less than or equal to the boiling point of the solvent;
• (3) optionally quenching the reaction by adding an agent for neutralizing the acid catalyst (I);
• and
• (4) removing the inert filler from the reaction medium;
• wherein Y═H or alkenyl in the functional units M′ and/or D′ and/or T′ of the POSf, and wherein, after the redistribution, other functionalization radicals Y1 bearing at least one unsaturation or at least one Si—H unit are grafted by hydrosilylation onto the ≡Si—H or ≡Si-alkenyl units, respectively, of the redistributed resin;
• wherein the redistributed and functionalized resin obtained is subjected to at least one other redistribution/functionalization, using POSfs bearing functional units.