GB1114386A – Process for the preparation of 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane
– Google Patents
GB1114386A – Process for the preparation of 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane
– Google Patents
Process for the preparation of 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane
Info
Publication number
GB1114386A
GB1114386A
GB2524/67A
GB252467A
GB1114386A
GB 1114386 A
GB1114386 A
GB 1114386A
GB 2524/67 A
GB2524/67 A
GB 2524/67A
GB 252467 A
GB252467 A
GB 252467A
GB 1114386 A
GB1114386 A
GB 1114386A
Authority
GB
United Kingdom
Prior art keywords
tetramethyl
product
phmesicl2
tetraphenyl
sodium
Prior art date
1966-01-17
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2524/67A
Inventor
Paul Alfred Eugene Guinet
Robert Raphael Puthet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rhone Poulenc SA
Original Assignee
Rhone Poulenc SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1966-01-17
Filing date
1967-01-17
Publication date
1968-05-22
1967-01-17
Application filed by Rhone Poulenc SA
filed
Critical
Rhone Poulenc SA
1968-05-22
Publication of GB1114386A
publication
Critical
patent/GB1114386A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C07—ORGANIC CHEMISTRY
C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
C07F7/02—Silicon compounds
C07F7/21—Cyclic compounds having at least one ring containing silicon, but no carbon in the ring
Abstract
1,3,5,7 – Tetramethyl – 1,3,5,7 – tetraphenyl-cyclotetrasiloxan is prepared by heating the polymeric hydrolysis product of PhMeSiCl2 with, as catalyst, an alkali metal carbonate, under reduced pressure with the continuous removal of the product by distillation. Aqueous hydrolysis of PhMeSiCl2 in known manner yields a polymer which is heated with preferably 0.05-6% of sodium, potassium, lithium or sodium-potassium carbonate, by weight of the said polymer, at a pressure of, for example, less than 1 cm. Hg., and on rectification the desired cyclotetra siloxane is obtained with, as a by-product, the crystalline cyclotrisiloxane.ALSO:1,3,5,7 – Tetramethyl – 1,3,5,7 – tetraphenyl -cyclotetrasiloxane may be employed in the treatment of fillers based upon silica and various metal oxides, such as titanium oxide and alumina.
GB2524/67A
1966-01-17
1967-01-17
Process for the preparation of 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane
Expired
GB1114386A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR46177A
FR1471200A
(en)
1966-01-17
1966-01-17
Process for preparing tetramethyl-1, 3, 5, 7 tetraphenyl-1, 3, 5, 7 cyclotetrasiloxane
Publications (1)
Publication Number
Publication Date
GB1114386A
true
GB1114386A
(en)
1968-05-22
Family
ID=8598916
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2524/67A
Expired
GB1114386A
(en)
1966-01-17
1967-01-17
Process for the preparation of 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane
Country Status (5)
Country
Link
US
(1)
US3484469A
(en)
DE
(1)
DE1618802B1
(en)
FR
(1)
FR1471200A
(en)
GB
(1)
GB1114386A
(en)
NL
(2)
NL6700310A
(en)
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS5250791B2
(en)
*
1972-12-30
1977-12-27
DE2536010C3
(en)
*
1975-08-13
1981-09-10
Bayer Ag, 5090 Leverkusen
Process for the preparation of octaphenylcyclotetrasiloxane
US4315870A
(en)
*
1979-01-24
1982-02-16
Rohm And Haas Company
Phosphorodiamidothioates
US4764631A
(en)
*
1988-01-15
1988-08-16
Dow Corning Corporation
Preparation of cyclopolydiorganosiloxanes via vapor phase rearrangement
FR2733988B1
(en)
*
1995-05-11
1997-08-01
Rhone Poulenc Chimie
PROCESS FOR THE MANUFACTURE OF CYCLOSILOXANES BY DEPOLYMERIZATION OF POLYSILOXANES
US5739370A
(en)
*
1997-04-02
1998-04-14
General Electric Company
Process the production of octaphenylcyclotetrasiloxane
DE69834325T2
(en)
*
1997-06-11
2007-05-03
Kaneka Corp.
Process for the preparation of cyclic oligosiloxanes
US6037486A
(en)
*
1997-12-08
2000-03-14
General Electric Company
Cracking of fluorosilicones to produce 1,3, 5-tris (3,3,3-trifluoropropyl)-1,3,5-trimethylcyclotrisiloxane
CN101125860B
(en)
*
2007-06-11
2011-05-11
杭州师范大学
Method for preparing methylphenylcyclosiloxane
CN101230073B
(en)
*
2008-01-14
2011-12-28
杭州师范大学
Method for preparing phenyl-containing mixed cyclic siloxane
CN111499868B
(en)
*
2020-04-10
2022-07-15
上海应用技术大学
Preparation method of methyl phenyl mixed ring body
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2849473A
(en)
*
1955-10-31
1958-08-26
Union Carbide Corp
Ethylsiloxane bis (dimethyl siloxane) cyclic trimer
US2979519A
(en)
*
1956-06-27
1961-04-11
Dow Corning
New cyclotrisiloxanes
US3337497A
(en)
*
1966-04-11
1967-08-22
Gen Electric
Ordered organopolysiloxanes
0
NL
NL129878D
patent/NL129878C/xx
active
1966
1966-01-17
FR
FR46177A
patent/FR1471200A/en
not_active
Expired
1967
1967-01-05
US
US607380A
patent/US3484469A/en
not_active
Expired – Lifetime
1967-01-09
NL
NL6700310A
patent/NL6700310A/xx
unknown
1967-01-17
DE
DE1967K0045061
patent/DE1618802B1/en
not_active
Withdrawn
1967-01-17
GB
GB2524/67A
patent/GB1114386A/en
not_active
Expired
Also Published As
Publication number
Publication date
FR1471200A
(en)
1967-03-03
DE1618802B1
(en)
1971-02-25
US3484469A
(en)
1969-12-16
NL129878C
(en)
NL6700310A
(en)
1967-07-18
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