Polyorganosiloxane, polyorganosiloxane composition, cured product, polyorganosiloxane-containing electrolytic solution for electrolytic capacitor, and electrolytic capacitor using same
Provided are a polyorganosiloxane high in elasticity, high in strength and the like. The polyorganosiloxane is a polyorganosiloxane including an M unit (R 1 R 2 R 3 SiO 1/2 ) at a content of 10% by mol or more relative to the total of silicon and a T unit (R 6 SiO 3/2 ) at a content of 80% by mol or less relative to the total of silicon, the polyorganosiloxane having an alkoxy group bound and a reactive functional group bound to silicon, wherein the polyorganosiloxane has the alkoxy group bound at a content of 0.07 to 4% by weight based on the total weight of the polyorganosiloxane and has 3 to 12 of the reactive functional groups bound on a number basis per a molecular weight of 1000 of the polyorganosiloxane, and the weight loss of the polyorganosiloxane in heating at 110° C. under a reduced pressure of 0.15 torr for 2 hours is 5% by weight or less.
1. A polyorganosiloxane of formula (1)
(R 1 R 2 R 3 SiO 1/2 ) a (R 4 R 5 SiO 2/2 ) b (R 6 SiO 3/2 ) c (SiO 4/2 ) d (O 1/2 R 7 ) e (O 1/2 H) f (1),
R 4 R 5 O 2/2 being a unit D, R 1 R 2 R 3 SiO 1/2 being a unit M, and R 6 SiO 3/2 being a unit T,
wherein, relative to total silicon moles,
a+b+c+d=1,
a≥0.1,
b≤0.3,
c≤0.8,
c+d≥0.1, and
e+f≤1.0,
wherein the polyorganosiloxane comprises an alkoxy group bound to silicon and a reactive functional group bound to silicon, other than an alkoxy group,
wherein the alkoxy group is present in the polyorganosiloxane at a content in a range of from 0.07 to 4% by weight based on total polyorganosiloxane weight,
wherein the polyorganosiloxane comprises 3 to 12 of the reactive functional group on a number basis per a molecular weight of 1000 of the polyorganosiloxane,
wherein the polyorganosiloxane has a weight loss in heating at 110° C. under a pressure of 0.15 ton for 2 hours of 5% by weight or less,
wherein R 1 to R 6 are each independently an organic functional group other than an alkoxy group and a hydroxyl group, or a hydrogen atom,
wherein R 7 is an organic group having 1 to 7 carbon atoms,
wherein the reactive functional group is optionally branched and/or cyclic, and
wherein the reactive functional group comprises an alkenyl group, a methacryloyl group, an acryloyl group, an acyl group, a cyclic ether group, a hydrogen atom taken together with silicon to form a hydrosilyl group, or a combination of two or more of any of these.
2. The polyorganosiloxane of claim 1 , wherein the content of the M unit relative to the total silicon is 60% by mol or less.
3. The polyorganosiloxane of claim 1 , wherein the content of the M unit, relative to the total silicon, is in a range of from 20 to 60% by mol.
4. The polyorganosiloxane of claim 1 , wherein the reactive functional group is branched and/or cyclic.
5. The polyorganosiloxane of claim 1 , wherein the reactive functional group is a vinyl group, and
wherein the polyorganosiloxane comprises 4 to 9 of the reactive functional group on a number basis per a molecular weight of 1000 of the polyorganosiloxane.
6. The polyorganosiloxane of claim 1 , which is a liquid at 40° C.
7. The polyorganosiloxane of claim 1 , having a viscosity at 25° C. in a range of from 5 to 20000 mPa·s.
8. The polyorganosiloxane of claim 1 , having a number average molecular weight Mn in a range of from 600 to 5000, measured by GPC in terms of polystyrene.
9. The polyorganosiloxane of claim 1 , wherein the M unit, optionally of formula R 101 R 102 R 103 SiO 1/2 , comprises a trimethylsiloxy group or a dimethylsiloxy group.
10. The polyorganosiloxane of claim 1 , which is an MQ resin.
11. The polyorganosiloxane of claim 1 , which is an MTQ resin.
12. A composition, comprising:
the polyorganosiloxane of claim 1 .
13. A cured product, obtained by curing at least a portion of the polyorganosiloxane of claim 1 .
14. The polyorganosiloxane of claim 1 , comprising:
the SiO 4/2 as a Q unit;
wherein the polyorganosiloxane has a maximum absorption wavenumber of a Si—O stretching vibration is found in the wavenumber range from 1030 to 1060 cm −1 in infrared absorption spectrum analysis.
15. The polyorganosiloxane of claim 14 , wherein the M unit is present in a range of from 10 to 60% by mol, relative to total silicon.
16. The polyorganosiloxane of claim 14 , wherein the reactive functional group is branched and/or cyclic.
17. The polyorganosiloxane of claim 14 , wherein the reactive functional group is a vinyl group, and
wherein the polyorganosiloxane comprises 4 to 9 of the reactive functional groups on a number basis per a molecular weight of 1000 of the polyorganosiloxane.
18. The polyorganosiloxane of claim 14 , which is a liquid at 40° C.
19. The polyorganosiloxane of claim 14 , having a viscosity at 25° C. in a range of from 5 to 20000 mPa·s.
20. The polyorganosiloxane of claim 14 , having a number average molecular weight Mn in a range of from 600 to 5000 or less, measured by GPC in terms of polystyrene.
21. The polyorganosiloxane of claim 14 , wherein the M unit comprises a trimethylsiloxy group or a dimethylsiloxy group.
22. The polyorganosiloxane of claim 14 , which is an MQ resin.
23. The polyorganosiloxane of claim 14 , which is an MTQ resin.
24. A composition, comprising:
the polyorganosiloxane of claim 14 .
25. A cured product, obtained by curing at least a portion of the polyorganosiloxane of claim 14 .
26. An electrolytic solution suitable for an electrolytic capacitor, the electrolytic solution comprising:
the polyorganosiloxane of claim 1 .
27. An electrolytic solution suitable for an electrolytic capacitor, the electrolytic solution comprising:
the polyorganosiloxane of claim 1 .
28. An electrolytic solution suitable for an electrolytic capacitor, the electrolytic solution comprising:
the polyorganosiloxane of claim 3 .
29. The solution of claim 26 , wherein the reactive functional group is branched and/or cyclic.
30. The solution of claim 26 , wherein the polyorganosiloxane has a number average molecular weight Mn in a range of from 600 to 50000 or less, measured by GPC in terms of polystyrene.
31. The solution of claim 26 , further comprising:
ethylene glycol and/or y-butyrolactone.
32. The solution of claim 26 , further comprising:
organic acid and/or inorganic acid onium salt(s).
33. An aluminum electrolytic capacitor, comprising:
an anode;
a cathode comprising aluminum; and
the electrolytic solution of claim 26 .
34. The polyorganosiloxane of claim 1 , comprising 4 to 9 of the reactive functional groups on a number basis per a molecular weight of 1000 of the polyorganosiloxane.
35. The polyorganosiloxane of claim 3 , comprising 4 to 9 of the reactive functional groups on a number basis per a molecular weight of 1000 of the polyorganosiloxane.