US4460650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile fibers, a process for producing acrylonitrile fibers, as well as producing peroxidized fibers, fibrous active carbon or carbon fibers therefrom
Assignee: Teijin Ltd
•
Filing: 1982-12-23
•
Granted: 1984-07-17
•
Expires: 2002-12-23
Abstract
Abstract Acrylonitrile fibers suitable for production of preoxidized fibers, fibrous active carbon and carbon fibers, which have thereon a water-soluble basic aluminum salt of the formula: Al.sub.2 (OH).sub.l (A).sub.m (B).sub.n (C).sub.p (Cl).sub.q (I) where (1) A, B and C stand for mutually different acid residues; (2) l and q are both an integer or decimal fraction larger than 0; (3) m, n and p are 0 or an integer or decimal fraction and make a total which is not zero; (4) l+mEm+nEn+pEp+q=6 (Em, En and Ep are the valence numbers of A, B and C, respectively); ##EQU1## in an amount of 0.005 to 5.0% by weight of aluminum element based on the fiber having the salt.
Inventors
- 👤 Hiroyasu Ogawa
- 👤 Kazuo Izumi
- 👤 Kenzi Shimazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:27
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/21; D01F9/22; D01F11/00; D01F11/10; D01F11/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
Acrylonitrile fibers which have been treated with a composition comprising a watersoluble basic aluminum salt of the formula: Al.sub.2 (OH).sub.1 (A).sub.m (B).sub.n (C).sub.p (Cl).sub.q (I) where (1) A, B and C stand for mutually different acid residues; (2) 1 and q are both an integer or decimal fraction larger than 0; (3) m, n and p are 0 or an integer or decimal fraction and make a total which is not zero; (4) 1+mEm+nEn+pEp+q=6(Em, En and Ep are the valence numbers of A, B and C, respectively); ##EQU6## so that an amount of 0.005 to 5.0% by weight of elemental aluminum is present in the salt in contact with the fibers based on the weight of the treated fibers.
Claim 2
Dependent Claim
119 words
Acrylonitrile fibers which have been treated with a composition comprising a watersoluble basic aluminum salt of the formula: Al.sub.2 (OH).sub.1 (A).sub.m (B).sub.n (C).sub.p (Cl).sub.q (I) where (1) A, B and C stand for mutually different acid residues; (2) 1 and q are both an integer or decimal fraction larger than 0; (3) m, n and p are 0 or an integer or decimal fraction and make a total which is not zero; (4) 1+mEm+nEn+pEp+q=6(Em, En and Ep are the valence numbers of A, B and C, respectively); ##EQU6## so that an amount of 0.005 to 5.0% by weight of elemental aluminum is present in the salt in contact with the fibers based on the weight of the treated fibers.
Claim 3
Dependent Claim
48 words
Acrylonitrile fibers as set forth in claim 1, wherein said fibers are composed of a material selected from the group consisting of a homopolymer, a copolymer, a mixture of a homopolymer and a copolymer, or a mixture of copolymers, and containing at least 85% by weight of acrylonitrile.
Claim 4
Dependent Claim
66 words
Acrylonitrile fibers as set forth in claim 2, wherein said fibers are composed of acrylonitrile and at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, their salts, esters, acid chlorides, acid amides, and n-substituted derivatives of the acid amides, vinyl chloride, vinylidene chloride, α-chloroacrylonitrile, vinyl pyridine, vinylsulfonic acid, allylsulfonic acid, vinylbenzenesulfonic acid and their alkali metal and alkaline earth metal salts.
Claim 5
Dependent Claim
16 words
Acrylonitrile fibers as set forth in claim 1, wherein said acid residues are inorganic acid residues.
Claim 6
Dependent Claim
35 words
Acrylonitrile fibers as set forth in claim 1, wherein each of said acid residues is an inorganic acid selected from the group consisting of nitric acid, nitrous acid, sulfuric acid, phosphoric acid and phosphorous acid.
Claim 7
Dependent Claim
133 words
Acrylonitrile fibers as set forth in claim 1, wherein said salt of formula I is a salt selected from the group consisting of: (1) Al 2 (OH) 2 .5 NO 3 Cl 2 .5 ; (2) Al 2 (OH) 5 (SO 4 ) 0 .25 Cl 0 .5 ; (3) Al 2 (OH) 2 .8 (SO 4 ) 0 .8 Cl 1 .6 ; (4) Al 2 (OH) 2 .7 (SO 4 ) 0 .26 Cl 2 .8 ; (5) Al 2 (OH) 2 .7 (SO 4 ) 0 .26 (PO 4 ) 0 .3 Cl 1 .88 ; (6) Al 2 (OH) 2 .65 (NO 3 ) 0 .05 (SO 4 ) 0 .1 (PO 4 ) 0 .1 Cl 2 .80 ; and (7) Al 2 (OH) 3 Cl 3 .
Claim 8
Dependent Claim
24 words
Acrylonitrile fibers as set forth in claim 1, wherein in said formula I, n and p are 0 and A is PO 4 .
Claim 9
Dependent Claim
62 words
Acrylonitrile fibers as set forth in claim 7, wherein said salt is selected from the group consisting of: (1) Al 2 (OH) 2 .7 Cl 2 .1 (PO 4 ) 0 .4 ; (2) Al 2 (OH) 2 .1 Cl 2 .4 (PO 4 ) 0 .5 ; (3) Al 2 (OH) 2 .8 Cl 1 .7 (PO 4 ) 0 .5.
Claim 10
Dependent Claim
25 words
Acrylonitrile fibers as set forth in claim 1, wherein said composition further comprises a phosphorous compound and an iron compound in addition to said salt.
Claim 11
Dependent Claim
20 words
Acrylonitrile fibers as set forth in claim 9, wherein said salt of formula I is free from any phosphorous element.
Claim 12
Dependent Claim
53 words
Acrylonitrile fibers as set forth in claim 9, wherein aluminum in said salt, iron in said iron compound and phosphorous in said phosphorous compound are present in the quantity of 0.005 wt% to 0.05 wt%, 0.005 to 0.01 wt% and 0.005 to 0.1 wt%, respectively, based on the weight of said treated fibers.
Claim 13
Dependent Claim
26 words
Acrylonitrile fibers as set forth in claim 9, wherein said phosphorous compound is selected from the group consisting of orthophosphoric acid, hypophosphorous acid and phosphorous acid.
Claim 14
Dependent Claim
32 words
Acrylonitrile fibers as set forth in claim 9, wherein said iron compound is selected from the group consisting of ferric chloride, ferric nitrate, ferric sulfate, ferrous chloride, ferrous nitrate and ferrous sulfate.
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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |