Preparation of amino-functional organopolysiloxanes

Details Preparation of amino-functional organopolysiloxanes Preparation of amino-functional organopolysiloxanes

2006-10-31

2006-10-31

Barts, Samuel (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

Reexamination Certificate

active

07129369

ABSTRACT:
A process for preparing amino-functional organopolysiloxanes comprising(i) mixing aminosilanes of the general formulain-line-formulae description="In-line Formulae" end="lead"?RaQbSi(OR1)4−(a+b),in-line-formulae description="In-line Formulae" end="tail"?where R and R1are hydrogen or optionally substituted hydrocarbyl,a is 0, 1 or 2, b is 1, 2 or 3, and a+b is ≦3,Q is —R5—[NR6(CH2)n]eN(R6)2,where R5is a hydrocarbyl diradical and R6is hydrogen, hydrocarbyl, or acyl,e is 0, 1, 2, 3 or 4, n is 2, 3, 4, 5 or 6,with organosilicon compounds selected from siloxanes comprising unitsRd⁡(O⁢R1)f⁢SiO4-(d+f)2⁢⁢and⁢⁢Rc⁢SiO4-c2or silanes RcSi(OR1)4−c,where c is 0, 1, 2 or 3, d is 0, 1 or 2, f is 1, 2 or 3,with the proviso that d+f is ≦3,basic catalysts selected from alkali metal hydroxides, alcoholates and siloxanolates,and optionally, alcohols H—[O(CHR2)p]mOR3,where R2and R3are hydrogen or hydrocarbyl,p is 2, 3 or 4, and m is 0 or an integer from 1 to 100,(ii) reacting by heating to 70–100° C., and(iii) subsequently, neutralizing the basic catalysts by addition of neutralizing agents which form salts which are soluble in the amino-functional organopolysiloxanes thus obtained.

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