Patent US5228319A successfully refreshed from Google Patents.
Patent EP0237199A2 successfully refreshed from Google Patents.
EP0237199A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Polysiloxazanes, silicon oxynitride fibers and processes for producing same
Assignee: Tonen General Sekiyu KK
•
Filing: 1987-02-12
•
Granted: —
•
Expires: 2007-02-12
Abstract
Abstract Novel polysiloxazanes comprising (̵(̵ SiH 2 ) n NH + and (̵(̵ SiH 2 ) m O as the main repeating units may be produced by reacting a dihalosilane or an adduct thereof with a Lewis base, with ammonia and water vapor or oxygen. From the polysiloxazane, novel silicon oxynitride shapes can be produced and the silicon odynitride shapes are essentially composed of silicon, nitride (5 mole% or more) and oxygen (5 mole% or more).
Inventors
- 👤 Osamu Funayama
- 👤 Mikiro Arai
- 👤 Hayato Nishii
- 👤 Takeshi Isoda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/584; C04B35/589; C08; C08G; C08G77/00; C08G77/48; C08G77/54
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
36 words
Polysiloxazanes comprising (̵(̵SiH 2 ) n NH)̵ and (̵(̵ (SiH 2 ) m O )̵ as the main repeating units where in each of n and m independently has a value of 1, 2 or 3.
Claim 2
Dependent Claim
36 words
Polysiloxazanes comprising (̵(̵SiH 2 ) n NH)̵ and (̵(̵ (SiH 2 ) m O )̵ as the main repeating units where in each of n and m independently has a value of 1, 2 or 3.
Claim 3
Dependent Claim
23 words
Polysiloxazanes as claimed in claim 1, wherein the polysiloxazanes have an average degree of polymerization based on repeating units of 5 to 300.
Claim 4
Dependent Claim
23 words
Polysiloxazanes as claimed in claim 1 or claim 2, wherein the polysiloxazanes are polymers having part of a linear sequence or cyclic sequence.
Claim 5
Dependent Claim
41 words
Polysiloxazanes as claimed in any one of the preceding claims, wherein the polysiloxazanes are composed of 50 to 60 mole% of hdyrogen, 20 to 25 mole% (excluding 0 mole%) of oxygen, and 0 to 25 mole% (excluding 0 mole%) of nitrogen.
Claim 6
Dependent Claim
41 words
Polysiloxazanes as claimed in claim 4, wherein 10% or less of said 50 to 60 mole% of the hydrogen is substituted by an organic group where the organic group is calculated based on the mole amount of the organic group itself.
Claim 7
Dependent Claim
72 words
A process for producing polysiloxazanes, in which at least one of a dihalosilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia and at least one of water and oxygen to form polysiloxazanes comprising (̵(̵SiH 2 ) n NH)̵ and (̵(̵ SiH 2 ) m O )̵ as the main repeating units where each of n and m independently has a value of 1, 2 or 3.
Claim 8
Dependent Claim
72 words
A process for producing polysiloxazanes, in which at least one of a dihalosilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia and at least one of water and oxygen to form polysiloxazanes comprising (̵(̵SiH 2 ) n NH)̵ and (̵(̵ SiH 2 ) m O )̵ as the main repeating units where each of n and m independently has a value of 1, 2 or 3.
Claim 9
Dependent Claim
35 words
A process as claimed in claim 6, wherein said at least one of the dihalosilane and the adduct is reacted with a combination of the ammonia and at least one of the water and oxygen.
Claim 10
Dependent Claim
35 words
A process as claimed in claim 6, wherein said at least one of the dihalosilane and the adduct is first reacted with the ammonia and then with at least one of the water and oxygen.
Claim 11
Dependent Claim
34 words
A process as claimed in claim 6, wherein said at least one of the dihalosilane and the adduct is first reacted with at least one of the water and oxygen and then with ammonia.
Claim 12
Dependent Claim
23 words
A process as claimed in any one of claims 6 to 9, wherein said dihalosilane is selected from dihalomonosilanes, dihalodisilanes and combinations thereof.
Claim 13
Dependent Claim
62 words
A process as claimed in any one of claims 6 to 10, wherein said Lewis base is selected from tertiary amines such as trialkylamines, pyridine, picoline and their derivatives; and secondary amines, phosphines, stibines and arsines, having a group with steric hindrance, and their derivatives, such as trimethylphosphine, dimethylethylphosphine, methyidiethylphosphine, triethylphosphine, trimethylarsine, trimethylstibine, trimethylamine, triethylamine, thiophene, furan, dioxane, selenophene and 1-methyl- phosphole.
Claim 14
Dependent Claim
42 words
A process as claimed in claim 6, wherein said at least one of the dihalosilane and the adduct is first reacted with ammonia to form polysilazanes and the polysilazanes are reacted with at least one of water and oxygen to form polyhydrosiloxazanes.
Claim 15
Dependent Claim
52 words
A process for producing silicon oxynitride fibers, in which at least one of a dihalosilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia and at least one of water and oxygen to form polysiloxazanes and the polysiloxazanes are spun and fired to form silicon oxynitride fibers.
Claim 16
Dependent Claim
52 words
A process for producing silicon oxynitride fibers, in which at least one of a dihalosilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia and at least one of water and oxygen to form polysiloxazanes and the polysiloxazanes are spun and fired to form silicon oxynitride fibers.
Claim 17
Dependent Claim
35 words
A process as claimed in claim 13, wherein said at least one of the dihalosilane and the adduct is reacted with a combination of the ammonia and at least one of the water and oxygen.
Claim 18
Dependent Claim
35 words
A process as claimed in claim 13, wherein said at least one of the dihalozilane and the adduct is first reacted with the ammonia and then with at least one of the water and oxygen.
Claim 19
Dependent Claim
34 words
A process as claimed in claim 13, wherein said at least one of the dihalosilane and the adduct is first reacted with at least one of the water and oxygen and then with ammonia.
Claim 20
Dependent Claim
42 words
A process as claimed in claim 13, wherein said at least one of the dihalosilane and the adduct is first reacted with ammonia to form polysilazanes and the polysilazanes are reacted with at least one of water and oxygen to form polyhydrosiloxazanes.
Claim 21
Dependent Claim
25 words
A process as claimed in any one of claims 13 to 17, wherein said polysiloxazanes are spun by dry spinning, centrifugal spinning or blow spinning.
Claim 22
Dependent Claim
33 words
A process as claimed in any one of claims 13 to 18, wherein said polysiloxazanes are dissolved in a solvent to form a spinning solution with a viscosity of 1 to 5000 poise.
Claim 23
Dependent Claim
25 words
A process as claimed in any one of claims 13 to 19, wherein the fibers resulting from said spinning of the polysiloxazanes are continuous fibers.
Claim 24
Dependent Claim
25 words
A process as claimed any one of claims 13 to 20, wherein said polysiloxazanes fibers are processed to form yarns and/or fabrics before being fired.
Claim 25
Dependent Claim
27 words
A process as claimed in any one of claims 13 to 21, wherein said polysiloxazanes fibers are fired in an inert atmosphere at above 800 0 c.
Claim 26
Dependent Claim
62 words
A process for producing silicon oxynitride fibers, in which at least one of a dihalozilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia to form polysilazanes, the polysilazanes are spun and then treated with at least one of water and oxygen to form polysilazane fibers, and the polysiloxazane fibers are fired to form silicon oxynitride fibers.
Claim 27
Dependent Claim
62 words
A process for producing silicon oxynitride fibers, in which at least one of a dihalozilane and an adduct of a dihalosilane with a Lewis base is reacted with ammonia to form polysilazanes, the polysilazanes are spun and then treated with at least one of water and oxygen to form polysilazane fibers, and the polysiloxazane fibers are fired to form silicon oxynitride fibers.
Claim 28
Dependent Claim
20 words
A process as claimed in claim 23, wherein said polysilazanes are spun by dry spinning, centrifugal spinning or blow spinning.
Claim 29
Dependent Claim
27 words
A process as claimed in claim 23 or claim 24, wherein said polysilazanes are prepared as a spinning solution with a viscosity of 1 to 5000 poise.
Claim 30
Dependent Claim
25 words
A process as claimed in any one of claims 23 to 25, wherein the fibers resulting from said spinning of the polysilazanes are continuous fibers.
Claim 31
Dependent Claim
30 words
A process as claimed in any one of claims 23 to 26, wherein said polysilazane fibers are processed to form yarns and/or fabrics before being reacted with water or oxygen.
Claim 32
Dependent Claim
26 words
A process as claimed in any one of claims 23 to 26, wherein said polysiloxazane fibers are processed to form yarns or fabrics before being fired.
Claim 33
Dependent Claim
22 words
A process as claimed in any one of claims 23 to 28, wherein said polysiloxazane fibers are fired at above 800 °C.
Claim 34
Dependent Claim
48 words
Silicon oxynitride fibers essentially composed of silicon, nitrogen and oxygen, the content of each of the nitrogen and the oxygen being 5 mole% or more the chemical composition of the silicon nitride fibers being as follows: where 0 < x > 3 and 0 < y > 4.
Claim 35
Dependent Claim
48 words
Silicon oxynitride fibers essentially composed of silicon, nitrogen and oxygen, the content of each of the nitrogen and the oxygen being 5 mole% or more the chemical composition of the silicon nitride fibers being as follows: where 0 < x > 3 and 0 < y > 4.
Claim 36
Dependent Claim
52 words
Silicon oxynitride fibers essentially composed of silicon, nitrogen, oxygen and carbon, the content of each of the nitrogen and oxygen being 5 mole% or more, the chemical composition of the silicon nitride fibers being as follows: where 0 < x > 3, and 0 < y > 4 and z < 1.1.
Claim 37
Dependent Claim
52 words
Silicon oxynitride fibers essentially composed of silicon, nitrogen, oxygen and carbon, the content of each of the nitrogen and oxygen being 5 mole% or more, the chemical composition of the silicon nitride fibers being as follows: where 0 < x > 3, and 0 < y > 4 and z < 1.1.
Claim 38
Dependent Claim
12 words
Silicon oxynitride fibers as claimed in claim 32, wherein z < 0.2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.