US3629053A
Expired / Lapsed
US
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Novel polyamide and fiber thereof
Assignee: Kanegafuchi Spinning Co Ltd
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Filing: 1969-10-15
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Granted: 1971-12-21
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Expires: 1989-10-15
Abstract
Abstract WHEREIN N IS AN INTEGER OF 11-13, IS MELT-SPINNABLE AND DRAWABLE TO FORM FIBERS SUPERIOR IN STRENGTH, Young''s modulus and dye receptivity and which possess special luster and hand. The content of the said unit in the polyamide is preferably at least 3 percent by mole. Polymers of this invention include a homopolyamide and copolyamides comprising the said unit and at least one different polyamide unit. In particular, poly ( Alpha , omega -alkylene hexahydroterephthalamide/ Alpha , omega alkylene terephthalamide) wherein either of its alkylene group has 11-13 carbon atoms, is excellent in spinnability as well as in drawability. Polymer blend comprising the homopolyamide or copolyamide and at least one aliphatic polyamide can provide fibers with superior properties as well. Furthermore a conjugate filament consisting of the copolyamide and nylon-6, nylon-66 or a polyester is superior in elasticity, recoverability after extension, heat resistance and antistatic property. A novel polyamide containing in its main molecular chain a recurring structural unit of Alpha , omega -alkylene hexahydroterephthalamide having the general formula,
Inventors
- 👤 Isao Kimura
- 👤 Fumimaro Ogata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08L; C08L77/00; C08L77/02; C08L77/10; D01F6/00; D01F6/58; D01F6/60; D01F6/78; D01F6/80; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
22 words
A fiber-forming linear homopolyamide consisting essentially of, as its recurring structural unit, Alpha , omega -alkylene hexahydroterephthalamide as defined in claim 1.
Claim 2
Dependent Claim
35 words
A fiber-forming copolyamide consisting essentially of 97-3 percent by mole of Alpha , omega -alkylene hexahydroterephthalamide as defined in claim 1 and 3-97 percent by mole of at least one polyamide structural unit different therefrom.
Claim 3
Dependent Claim
32 words
A copolyamide as claimed in claim 3, wherein the said structural unit is Alpha , omega -alkylene terephthalamide having the following general formula: where, n is an integer of 11 to 13.
Claim 4
Dependent Claim
32 words
A copolyamide as claimed in claim 4, wherein the number of carbon atoms of the alkylene groups in Alpha , omega -alkylene hexahydroterephthalamide and in Alpha , omega -alkylene terephthalamide are equal.
Claim 5
Dependent Claim
21 words
A fiber-forming linear polyamide as claimed in claim 1, which has an inherent viscosity ( eta ) of at least 0.7.
Claim 6
Dependent Claim
18 words
A fiber-forming linear polyamide as claimed in claim 6, wherein the inherent viscosity ( eta ) is 0.8-1.2.
Claim 7
Dependent Claim
21 words
A polymer blend consisting essentially of a fiber-forming linear polyamide as claimed in claim 1 and at least one aliphatic polyamide.
Claim 8
Dependent Claim
21 words
A polymer blend consisting essentially of a fiber-forming linear homopolyamide as claimed in claim 2 and at least one aliphatic polyamide.
Claim 9
Dependent Claim
21 words
A polymer blend consisting essentially of a fiber-formIng linear copolyamide as claimed in claim 4 and at least one aliphatic polyamide.
Claim 10
Dependent Claim
30 words
A polymer blend as claimed in claim 9, wherein the amount of said homopolyamide is 97-3 percent by weight and that of said aliphatic polyamide is 3-97 percent by weight.
Claim 11
Dependent Claim
27 words
A polymer blend as claimed in claim 10, which consists of 97-3 percent by weight of said copolyamide and 3-97 percent by weight of said aliphatic polyamide.
Claim 12
Dependent Claim
27 words
A polymer blend as claimed in claim 10, which consists of 97-5 percent by weight of said copolyamide and 5-95 percent by weight of said aliphatic polyamide.
Claim 13
Dependent Claim
36 words
A polymer blend as claimed in claim 12, wherein said copolyamide consists of 10-97 percent by mole of the Alpha , omega -alkylene terephthalamide and 90-3 percent by mole of the Alpha , omega -alkylene hexahydroterephthalamide.
Claim 14
Dependent Claim
55 words
A polymer blend as claimed in claim 8, wherein said aliphatic polyamide is selected from the group consisting of polymerization products of lactams, of aliphatic omega -monoamino-monocarboxylic acids having six- 13 carbon atoms and of nylon salts consisting of aliphatic diamine having four- 13 carbon atoms and aliphatic dicarboxylic acid having six- 13 carbon atoms.
Claim 15
Dependent Claim
55 words
A polymer blend as claimed in claim 12, wherein said aliphatic polyamide is selected from the group consisting of polymerization products of lactams, of aliphatic omega -monoamino-monocarboxylic acids having six- 13 carbon atoms and of nylon salts consisting of aliphatic diamine having four- 13 carbon atoms and aliphatic dicarboxylic acid having six- 13 carbon atoms.
Claim 16
Dependent Claim
12 words
A drawn fiber which comprises a polyamide as claimed in claim 1.
Claim 17
Dependent Claim
14 words
A drawn fiber which consists essentially of a homopolyamide as claimed in claim 2.
Claim 18
Dependent Claim
14 words
A drawn fiber which consists essentially of a copolyamide as claimed in claim 3.
Claim 19
Dependent Claim
14 words
A drawn fiber which consists essentially of a copolyamide as claimed in claim 4.
Claim 20
Dependent Claim
14 words
A drawn fiber which consists essentially of a copolyamide as claimed in claim 5.
Claim 21
Dependent Claim
14 words
A drawn fiber which consists essentially of a copolyamide as claimed in claim 6.
Claim 22
Dependent Claim
14 words
A drawn fiber which consists essentially of a copolyamide as claimed in claim 7.
Claim 23
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 8.
Claim 24
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 9.
Claim 25
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 10.
Claim 26
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 11.
Claim 27
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 12.
Claim 28
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 13.
Claim 29
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 14.
Claim 30
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 15.
Claim 31
Dependent Claim
15 words
A drawn fiber which consists essentially of a polymer blend as claimed in claim 16.
Claim 32
Dependent Claim
62 words
A crimpable composite filament having at least two components in eccentric relationship across the filament, one component being a synthetic linear polymer selected from the group consisting of polyesters predominantly comprising polyethylene terephthalate and polyamides predominantly comprising poly- epsilon -caproamide or polyhexamethylene adipamide and as another component eccentric to and continuous with said first component, a copolyamide as claimed in claim 4.
Claim 33
Dependent Claim
35 words
A drawn crimpable composite filament as claimed in claim 33, wherein the number of carbon atoms of the alkylene groups in Alpha , omega -alkylene hexahydroterephthalamide and in Alpha , omega -alkylene terephthalamide are equal.
Claim 34
Dependent Claim
24 words
A drawn crimpable composite filament as claimed in claim 33, wherein the copolyamide has an inherent viscosity ( eta ) of at least 0.7.
Claim 35
Dependent Claim
22 words
A drawn crimpable composite filament as claimed in claim 33, wherein thE copolyamide has an inherent viscosity ( eta ) of 0.8-1.2.
Claim 36
Dependent Claim
38 words
A drawn crimpable composite filament as claimed in claim 33, wherein the said copolyamide consists of 20-97 percent by mole of the Alpha , omega -alkylene terephthalamide and 80-3 percent by mole of Alpha , omega -alkylene hexahydroterephthalamide.
Claim 37
Dependent Claim
25 words
A drawn crimpable composite filament as claimed in claim 33, wherein the melting point of the copolyamide is higher than that of the first component.
Claim 38
Dependent Claim
27 words
A drawn crimpable composite filament as claimed in claim 33, wherein the conjugate ratio of the first component and the copolyamide is in the range of 9:1-1:9.
Claim 39
Dependent Claim
30 words
A drawn crimpable composite filament as claimed in claim 33, wherein the arrangement of the two components in the cross section of the filament is eccentric sheath and core relation.
Claim 40
Dependent Claim
54 words
A drawn crimpable composite filament as claimed in claim 33, wherein the first component consists of at least 90 percent by weight of polyethylene terephthalate and at most 10 percent by weight of at least one polyester different therefrom selected from the group consisting of polyethylene isophthalate, polytetramethylene terephthalate, polyethylene hexahydroterephthalate and polyethylene oxybenzoate.
Claim 41
Dependent Claim
37 words
A drawn crimpable composite filament as claimed in claim 33, wherein the first component consists of polyester and the arrangement of the two components in the cross section of the filament is eccentric sheath and core relation.
Claim 42
Dependent Claim
45 words
A composite filament having at least two components in concentric sheath and core relation across the filament, one component being a polyester predominantly comprising polyethylene terephthalate and as another component concentric to and continuous with said first component, a copolyamide as claimed in claim 4.
References Cited (Backward Citations)
US3489641A
Cited
US3511749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |