Patent ID: 7129369

Claim:
A process for preparing amino-functional organopolysiloxanes comprising (i) mixing aminosilanes (A) of the general formula R a Q b Si(OR 1 ) 4−(a+b) (I), where each R may be the same or different and is a hydrogen atom or a monovalent unsubstituted or fluorine-, chlorine- or bromine-substituted C 1 - to C 18 -hydrocarbyl radical, each R 1 is the same or different and is a hydrogen atom or a C 1 - to C 4 -alkyl radical which may be substituted by an ether oxygen atom, a is 0, 1 or 2, b is 1, 2 or 3, with the proviso that the sum total of a+b is ≦3, where each Q may be the same or different and is a group of the formula —R 5 —[NR 6 (CH 2 ) n ] e N(R 6 ) 2 (II), where each R 5 independently is a bivalent linear or branched C 1 - to C 18 -hydrocarbyl radical, each R 6 may be the same or different and is a hydrogen atom, an unsubstituted or fluorine-, chlorine-, bromine-, hydroxyl- or C 1 -C 5 -alkoxy-substituted C 1 - to C 18 -hydrocarbyl radical or acyl radical, e is 0, 1, 2, 3 or 4, n is 2, 3, 4, 5 or 6, with organosilicon compounds (B) selected from the group consisting of siloxanes (B′) comprising units of the formula R d ⁡ ( O ⁢ R 1 ) f ⁢ SiO 4 - ( d + f ) 2 , and ( III ) R c ⁢ SiO 4 - c 2 ( IV ) and silanes (B″) of the formula R c Si(OR 1 ) 4−c (V), where c is 0, 1, 2 or 3, d is 0, 1 or 2, f is 1, 2 or 3, with the proviso that the sum total of d+f is ≦3, in the presence of at least one basic catalyst (C) selected from the group consisting of sodium hydroxide, sodium alkoxides, and sodium silanolates, and optionally one or more alcohols (D) of the formula H—[O(CHR 2 ) p ] m OR 3 (VI), where each R 2 may be the same or different and is a hydrogen atom or a C 1 - to C 18 -hydrocarbyl radical, each R 3 is the same or different and is a hydrogen atom, a C 1 - to C 30 -hydrocarbyl radical, or a group of the formula —(C═O)—R 4 , where R 4 is an R 2 or O—R 2 radical, p is 2, 3 or 4, and m is 0 or an integer from 1 to 100, (ii) reacting the mixture by heating to 70–100° C., and (iii) subsequent to reacting (ii), neutralizing the basic catalysts by addition of neutralizing agents which combine with the basic catalysts to form salts which are soluble in the amino-functional organopolysiloxanes thus obtained, wherein said reacting (iii) is carried out at a pressure in the range of from 1 to 200 hPa when alcohols (D) are present, and 300 to 700 hPa when alcohols (D) are not present.