US4426228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic molding and spinning compound with low contents of low-molecular decomposition products
Assignee: Akzo Nobel NV
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Filing: 1981-08-26
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Granted: 1984-01-17
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Expires: 2001-08-26
Abstract
Abstract Molding compositions containing cellulose, 95-50% of a tertiary amine oxide, and up to 25% of a non-solvent also up to 10% of other polymers, all proportions relative to the weight of the composition and as additive, 0.01 up to 0.5% by weight, relative to the tertiary amine oxide, of an organic compound with a minimum of four carbon atoms and a minimum of two conjugated double bonds and a minimum of two groups in the form of hydroxyl and/or amino groups which, in turn, have a minimum of one unsubstituted hydrogen atom and/or contain glycerol aldehyde.
Inventors
- 👤 Alexander Brandner
- 👤 Hand G. Zengel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:22
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/08; B01D71/10; C; C08; C08L; C08L1/00; C08L1/02; D; D01; D01F; D01F2/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
Molding or spinning substance, comprising by weight 4.99-25% cellulose, 95-50% of a tertiary amine oxide, in given instances up to 25% of a non-solvent and up to 10% of other polymers, all proportions relative to the weight of the molding or spinning substance, and as additive, singly or in a mixture, 0.01 up to 0.5% by weight, relative to the tertiary amine oxide, of an organic compound with a minimum of four carbon atoms and a minimum of two conjugated double bonds and a minimum of two groups in the form of hydroxyl and/or amino groups which, in turn, have a minimum of one unsubstituted hydrogen atom and/or contain glycerol aldehyde, said additive being soluble in said tertiary amine oxide as well as its mixture with said non-solvent.
Claim 2
Dependent Claim
128 words
Molding or spinning substance, comprising by weight 4.99-25% cellulose, 95-50% of a tertiary amine oxide, in given instances up to 25% of a non-solvent and up to 10% of other polymers, all proportions relative to the weight of the molding or spinning substance, and as additive, singly or in a mixture, 0.01 up to 0.5% by weight, relative to the tertiary amine oxide, of an organic compound with a minimum of four carbon atoms and a minimum of two conjugated double bonds and a minimum of two groups in the form of hydroxyl and/or amino groups which, in turn, have a minimum of one unsubstituted hydrogen atom and/or contain glycerol aldehyde, said additive being soluble in said tertiary amine oxide as well as its mixture with said non-solvent.
Claim 3
Dependent Claim
23 words
Molding or spinning substance according to claim 1, wherein the hydroxyl and/or amino groups are bonded to the carbon atoms 1 and 4.
Claim 4
Dependent Claim
20 words
Molding or spinning substance according to claim 1, wherein the hydroxyl and/or amino groups are bonded to adjacent carbon atoms.
Claim 5
Dependent Claim
19 words
Molding or spinning substance according to claim 3, wherein the adjacent carbon atoms are linked by a double bond.
Claim 6
Dependent Claim
18 words
Molding or spinning substance according to claim 4, wherein the other double bond is a double carbonyl bond.
Claim 7
Dependent Claim
16 words
Molding or spinning substance according to claim 5, wherein the organic compound is L(+) ascorbic acid.
Claim 8
Dependent Claim
25 words
Molding or spinning substance according to claim 1, wherein the four carbon atoms and two conjugated double bonds are constituents of an aromatic ring system.
Claim 9
Dependent Claim
17 words
Molding or spinning substance according to claim 7, wherein the aromatic ring system is a benzene nucleus.
Claim 10
Dependent Claim
33 words
Molding or spinning substance according to claim 1 or claim 28, wherein the organic compound is pyrocatechol, pyrogallol, gallic acid, or the methyl ester, ethyl ester, propylester or isopropyl ester of gallic acid.
Claim 11
Dependent Claim
24 words
Molding or spinning substance according to claim 2 or claim 28, wherein the organic compound is hydroquinone, 4(methylamino)phenol sulfate, N-cyclohexyl-N'-(2-cyanoethyl)-1,4-phenylene diamine or N-cyclohexyl-N'-phenyl-1,4-phenylene diamine.
Claim 12
Dependent Claim
64 words
Process for producing the molding or spinning substance according to claim 1, comprising stirring the cellulose and, in given instances, also the other polymer, at temperatures between 70° and 190° C. in a tertiary amino oxide containing the organic compound as additive and, in given instances, up to 25% by weight of a non-solvent, said stirring to proceed until the polymer has been dissolved.
Claim 13
Dependent Claim
14 words
Process according to claim 11, wherein said temperature is between 100° and 150° C.
Claim 14
Dependent Claim
14 words
Process according to claim 12, wherein the temperature is between 115° and 130° C.
Claim 15
Dependent Claim
26 words
Process according to claim 11, wherein the mixture of tertiary amino oxide, non-solvent and additive has been recuperated from the precipitating bath of a molding process.
Claim 16
Dependent Claim
37 words
In a process for the production of molded shapes of the type in which a molding or spinning substance is extruded through an extruder, the improvement comprising employing the molding or spinning substance according to claim 11.
References Cited (Backward Citations)
US4144080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |