Production of polyether siloxanes

Patent metadata

Field	Value
Publication number	US-9540500-B2
Application number	US-201514959461-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 5, 2014
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

Processes for producing polyether siloxanes are provided in which unsaturated polyethers are reacted with one or more SiH-functional siloxanes in the presence of Pt(0) compounds and tertiary amines Also, provided is the use of Pt(0) compounds and tertiary amines for producing polyether siloxanes and to the use of the polyether siloxanes thus obtained.

First claim

What is claimed as new is:

1. A process for producing polyether siloxanes, said process comprising:
reacting
a) one or more unsaturated polyethers with
b) one or more SiH-functional siloxanes in the presence of
c) Pt(0) compounds, and
d) one or more tertiary amines of general formula 1

where
R 1 =R 2 or independently at each occurrence is H or a C 2 to C 14 alkyl radical, and
R 2 =C 1 to C 14 alkyl radicals bearing at least one OH group.

2. The process according to claim 1 , wherein R 2 of the one or more amines of general formula 1 are C 1 to C 14 alkyl radicals each bearing precisely one OH group.

3. The process according to claim 1 , wherein the radicals R 1 of the one or more amines of general formula 1 are the same as R 2 .

4. The process according to claim 1 , wherein the radicals R 2 of the one or more amines of general formula 1 are selected from —CH 2 CH 2 OH, —CH 2 CH(CH 3 )OH, and a combination of —CH 2 CH 2 OH and —CH 2 CH(CH 3 )OH.

5. The process according to claim 1 , wherein the one or more unsaturated polyethers of component a) are polyethers of general formula II

where
a=0 to 12,
b=2 to 100,
c =0 to 100, and
d =0 to 40,
with the proviso that b +c +d ≧3

where
R 5 =identical or different C 1 to C 8 hydrocarbon radicals or H,
R 6 =identical or different C 1 to C 12 hydrocarbon radicals or H, and
R 7 =identical or different C 1 to C 12 hydrocarbon radicals or C(O)Me or H.

6. The process according to claim 1 , wherein the one or more SiH-functional siloxanes of component b) are siloxanes of general formula III
M e M′ f D g D′ h T i Q j   (III)

where
M=[R 8 3 SiO 1/2 ] M′=[R 8 2 SiHO 1/2 ]
D=[R 8 2 SiO 2/2 ] D′=[R 8 SiHO 2/2 ]
T=[R 8 SiO 3/2 ] Q=[SiO 4/2 ]and
e=0 to 10,
f=0 to 10,
g=0 to 500,
h=0 to 100,
i=0 to 10,
j=0 to 10
with the proviso that e +f≧2 and f +h ≧1,

where R 8 =identical or different C 1 to C 30 hydrocarbon radicals.

7. The process according to claim 1 , wherein the Pt(0) compounds comprise Pt(0) compounds bearing tetramethyldivinylsiloxane, or Pt(PPh 3 ) 4 .

Assignees

• Evonik Degussa Gmbh

Inventors

• Ferenz Michael
• Hofmann Stephan
• Dudzik Horst
• Schiller Carsten

Classifications

• C08G77/12

  containing silicon bound to hydrogen · CPC title

• C08L83/04

  Polysiloxanes · CPC title

• C08L71/02

  Polyalkylene oxides · CPC title

• C08G77/46

  containing polyether sequences · CPC title

• C08G65/00 Primary

  Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule · CPC title