Organopolysiloxanes and methods for preparing same

A method for preparing an organopolysiloxane (A) comprising putting into contact at a temperature comprised between 10 and 75° C.:

• at least one compound (C) selected from the group consisting of the organic compounds comprising at least one alkene or alkyne function for which at least one of the substituents is an acid function and the organic compounds comprising at least one acid function and at least one alkene or alkyne function for which at least one of the substituents is an electronattractor group;
• and at least an acid function, and
• at least one organopolysiloxane (B) selected from the group consisting of the organopolysiloxanes comprising siloxyl units (I.1) and (I.2) of the following formulae:
• Y
• a
• ⁢
• Z
• b
• 1
• ⁢
• SiO
• 4
• -
• (
• a
• +
• b
• )
• 2
• ;
• and
• (
• I
• ⁢
• .1
• )
• Z
• c
• 2
• ⁢
• SiO
• 4
• -
• c
• 2
• (
• I
• ⁢
• .2
• )
• wherein:
• a=1 or 2, b=0, 1 or 2 and a+b=1, 2 or 3
• c=1, 2, 3 or 4
• the symbols Y, either identical or different, represent a functional group of formula (I.3):
• -E-(NH-G)h-(NH2)i (I.3)
• wherein:
• h=0 or 1;
• i=0 or 1;
• h+i=1 or 2;
• E represents an aliphatic, cycloaliphatic or aromatic divalent hydrocarbon radical comprising from 1 to 30 carbon atoms;
• when it is present, G represents an aliphatic hydrocarbon radical comprising from 1 to 10 carbon atoms, monovalent when i=0 or divalent when i=1;
• the symbols Z1 and Z2, either identical or different, represent a monovalent hydrocarbon radical having from 1 to 30 carbon atoms and optionally comprising one or several unsaturations and/or one or several fluorine atoms, a hydroxyl group, or a radical-OR1 with IV which represents a linear, cyclic or branched C1-C10 hydrocarbon radical;
• said polyorganosiloxane (B) comprising, per molecule at least one siloxyl unit (I.1) bearing at least one functional group of formula (I.3),
• the method being carried out in the presence of a filler.