Siloxacycles are synthesized in high yield and purity by reaction of acyloxymethyl (alkoxy) silanes in the presence of a catalyst which is a metal from groups 3 to 15 of the periodic table, or a compound thereof.
A method for producing (hydroxymethyl)polysiloxanes of the general formula I
(SiO
4/2
)
k
(R
1
SiO
3/2
)
m
(R
1
2
SiO
2/2
)
p
(R
1
3
SiO
1/2
)
q
[O
1/2
—(SiR
2
2
—X—Y—)
a
SiR
2
2
—CH
2
—OH]
s
[O
1/2
H]
t
formula I,
includes reacting silanol-containing organosiloxanes of the general formula II
(SiO
4/2
)
k
(R
1
SiO
3/2
)
m
(R
1
2
SiO
2/2
)
p
(R
1
3
SiO
1/2
)
q
[O
1/2
H]
r
formula II
with cyclic or acyclic compounds that include at least one unit of the general formula III.
Z—[O—CH
2
—SiR
2
2
]
n
—Y formula III