US4177200A
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Silyl phosphates as neutralizing agents for alkali metal hydroxides
Assignee: General Electric Co
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Filing: 1977-11-25
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Granted: 1979-12-04
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Expires: 1997-11-25
Abstract
Abstract A silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in silicone reactions, comprising the reaction product of a linear siloxane, and a phosphorous oxyhalogen or phosphoric acid. The reaction products of the phosphorous oxyhalogen over phosphoric acid are preferred. Such a reaction product is preferred for the continuous neutralization of alkali metal hydroxides in the equilibration of siloxanes.
Inventors
- 👤 John S. Razzano
- 👤 Louis P. Petersen
- 👤 Bruce A. Ashby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:36
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/045; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/095
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
74 words
A silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in silicone reactions comprising the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR6## and siloxane of the formula, ##STR7## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
Claim 2
Dependent Claim
74 words
A silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in silicone reactions comprising the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR6## and siloxane of the formula, ##STR7## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
Claim 3
Dependent Claim
21 words
The reaction product of claim 1 wherein there is present 3 moles of the siloxane per mole of the halophosphorous compound.
Claim 4
Dependent Claim
13 words
The reaction product of claim 1 which has the formula, (R.sub.3 SiO).sub.3 P=O
Claim 5
Dependent Claim
11 words
The reaction product of claim 1 which has the formula, ##STR8##
Claim 6
Dependent Claim
18 words
The reaction product of claim 1 wherein R is an alkyl radical of 1 to 8 carbon atoms.
Claim 7
Dependent Claim
26 words
The reaction product of claim 1 wherein R is methyl and the reaction product has phosphoric acid content that varies from 5 to 30% by weight.
Claim 8
Dependent Claim
81 words
A process for forming a silyl phosphate which is an improved neutralizing agent from alkali metal hydroxide in silicone mixture comprising, (a) reacting a siloxane selected from the class consisting of siloxanes of the formula, ##STR9## and siloxanes of the formula, ##STR10## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 wherein R is hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20 and (b) distilling off undesired by-products.
Claim 9
Dependent Claim
81 words
A process for forming a silyl phosphate which is an improved neutralizing agent from alkali metal hydroxide in silicone mixture comprising, (a) reacting a siloxane selected from the class consisting of siloxanes of the formula, ##STR9## and siloxanes of the formula, ##STR10## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 wherein R is hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20 and (b) distilling off undesired by-products.
Claim 10
Dependent Claim
23 words
The process of claim 7 wherein in step (a) there is reacted 3 moles of the siloxane per mole of the halophosphorous compound.
Claim 11
Dependent Claim
21 words
The process of claim 7 wherein the reaction is carried out at temperatures in the range of 80° to 150° C.
Claim 12
Dependent Claim
17 words
The process of claim 1 wherein R is an alkyl radical of 1 to 8 carbon atoms.
Claim 13
Dependent Claim
40 words
The process of claim 1 wherein R is methyl and the product of the reaction has a phosphoric acid content that varies from 5 to 30% by weight and a viscosity that is less than 500 centipoise at 25° C.
Claim 14
Dependent Claim
61 words
A silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in the silicone reactions comprising the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR11## and siloxanes of the formula, ##STR12## with phosphoric acid, where R is a hydrocarbyl radical free of aliphatic concentration and x varies from 1 to 20.
Claim 15
Dependent Claim
61 words
A silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in the silicone reactions comprising the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR11## and siloxanes of the formula, ##STR12## with phosphoric acid, where R is a hydrocarbyl radical free of aliphatic concentration and x varies from 1 to 20.
Claim 16
Dependent Claim
21 words
The reaction product of claim 12 wherein there is present 1.5 moles of the siloxane per mole of the phosphoric acid.
Claim 17
Dependent Claim
20 words
The reaction product of claim 12, wherein a major portion of the product has the formula, [R.sub.3 Si O].sub.3 P=O
Claim 18
Dependent Claim
17 words
The reaction product of claim 12, wherein a major portion of the product has the formula, ##STR13##
Claim 19
Dependent Claim
18 words
The reaction product of claim 12 wherein R is an alkyl radical of 1 to 8 carbon atoms.
Claim 20
Dependent Claim
27 words
The reaction product of claim 12 wherein R is methyl and the reaction product has a phosphoric acid content that varies from 5 to 30% by weight.
Claim 21
Dependent Claim
69 words
A process for forming a silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in silicone reactions comprising (a) reacting a siloxane selected from the class consisting of siloxanes of the formula, ##STR14## and siloxanes of the formula, ##STR15## with phosphoric acid wherein R is a hydrocarbyl radical free of aliphatic concentration and x varies from 1 to 20 and (b) distilling of H 2 O.
Claim 22
Dependent Claim
69 words
A process for forming a silyl phosphate which is an improved neutralizing agent for alkali metal hydroxides in silicone reactions comprising (a) reacting a siloxane selected from the class consisting of siloxanes of the formula, ##STR14## and siloxanes of the formula, ##STR15## with phosphoric acid wherein R is a hydrocarbyl radical free of aliphatic concentration and x varies from 1 to 20 and (b) distilling of H 2 O.
Claim 23
Dependent Claim
23 words
The process of claim 18 wherein in step (a) there is reacted 1.5 moles of the siloxanes per mole of the phosphoric acid.
Claim 24
Dependent Claim
17 words
The process of claim 18 wherein the reaction is carried out at a temperature of 150°-195° C.
Claim 25
Dependent Claim
17 words
The process of claim 18 where R is an alkyl radical of 1 to 8 carbon atoms.
Claim 26
Dependent Claim
39 words
The process of claim 18 wherein R is methyl and the product of the reaction has phosphoric acid content that varies from 5 to 30% by weight and a viscosity that is less than 500 centipoise at 25° C.
Claim 27
Dependent Claim
80 words
A process of continuously neutralizing basic alkali metal silicone compounds present in siloxane equilibration reacting products comprising continuously adding to said siloxane equilibration reaction products a neutralizing amount of the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR16## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
Claim 28
Dependent Claim
80 words
A process of continuously neutralizing basic alkali metal silicone compounds present in siloxane equilibration reacting products comprising continuously adding to said siloxane equilibration reaction products a neutralizing amount of the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR16## with a halophosphorous compound selected from the class consisting of PO Cl 3 and PO Br 3 where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
Claim 29
Dependent Claim
72 words
A process for continuously neutralizing basic aliphatic metal silicone compounds present in siloxane equilibration reaction products comprising continuously adding to said siloxane equilibration reaction products a neutralizing amount of the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR17## and siloxanes of the formula, ##STR18## with phosphoric acid where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
Claim 30
Dependent Claim
72 words
A process for continuously neutralizing basic aliphatic metal silicone compounds present in siloxane equilibration reaction products comprising continuously adding to said siloxane equilibration reaction products a neutralizing amount of the reaction product of a siloxane selected from the class consisting of siloxanes of the formula, ##STR17## and siloxanes of the formula, ##STR18## with phosphoric acid where R is a hydrocarbyl radical free of aliphatic unsaturation and x varies from 1 to 20.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |