US4081430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic polyamide crystalline complex and the method for producing the same
Assignee: Mitsubishi Chemical Corp
•
Filing: 1976-10-19
•
Granted: 1978-03-28
•
Expires: 1996-10-19
Abstract
Abstract A novel aromatic polyamide crystalline complex capable of being molded at low temperatures is produced by contacting an aromatic polyamide in which at least 75 mol % of repeating unit comprises m-phenyleneisophthalamide with at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, epsilon -caprolactam and 2-pyrrolidone to form a crystalline complex and then removing the hexamethylphosphoric amide, N-methyl-2-pyrrolidone, epsilon -caprolactam and 2-pyrrolidone which are not contained in the crystal.
Inventors
- 👤 Shunsuke Minami
- 👤 Hideto Kakida
- 👤 Jun Nakauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:14
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/48
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
A crystalline complex which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide, wherein said crystalline complex has a maximum melting point of 156° C.
Claim 2
Dependent Claim
65 words
A crystalline complex which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide, wherein said crystalline complex has a maximum melting point of 156° C.
Claim 3
Dependent Claim
37 words
The crystalline complex of claim 1 which consists essentially of an aromatic polyamide and hexamethylphosporic amide and which shown reflections at X-ray diffraction angle (2θ) of 10.7°, 12.2°, 14.0°, 15.1°, 19.1°, 22.2°, 24.5°, 26.5°, 27.9° and 31.1°.
Claim 4
Dependent Claim
58 words
The crystalline complex of claim 1, which is produced by contacting an aromatic polyamide with hexamethylphosphoric amide to form a crystalline complex and then removing the excess of hexamethylphosphoric amide which is not contained in the crystal and which shows reflections at X-ray diffraction angles (2θ) of 10.7°, 12.2°, 14.0°, 15.1°, 19.1°, 22.2°, 24.5°, 26.5°, 27.9° and 31.1°.
Claim 5
Dependent Claim
33 words
The crystalline complex of claim 1 which consists essentially of an aromatic polyamide and N-methyl-2-pyrrolidone and which shows reflections at X-ray diffraction angles (2θ) of 11.5°, 13.5°, 16.2°, 18.3°, 22.0°, 24.4° and 26.0°.
Claim 6
Dependent Claim
53 words
The crystalline complex of claim 1, which is produced by contacting an aromatic polyamide with N-methyl-2-pyrrolidone to form a crystalline complex and then removing the excess of N-methyl-2-pyrrolidone which is not contained in the crystal and which shows reflections at X-ray diffraction angles (2θ) of 11,5°, 13.5°, 16.2°, 18.3°, 22.0°, 24.4° and 26.0°.
Claim 7
Dependent Claim
33 words
The crystalline complex of claim 1, which consists essentially of an aromatic polyamide and ε-caprolactam and which shows reflections at X-ray diffraction angles (2θ) of 9.0°, 11.8°, 17.9°, 19.8°, 23.3°, 24.5° and 28.7°.
Claim 8
Dependent Claim
53 words
The crystalline complex of claim 1, which is produced by contacting an aromatic polyamide with ε-caprolactam to form a crystalline complex and then removing the excess of ε-caprolactam which is not contained in the crystal and which shows reflections at X-ray diffraction angles (2θ) of 9.0°, 11.8°, 17.9°, 19.8°, 23.3°, 24.5° and 28.7°.
Claim 9
Dependent Claim
35 words
The crystalline complex of claim 1, which consists essentially of the aromatic polyamide and 2-pyrrolidone and which shows reflections at X-ray diffraction angles (2θ) of 11.0°, 17.4°, 18.4°, 20.2°, 21.0°, 23.2°, 25.0°, 26.2° and 27.4.
Claim 10
Dependent Claim
55 words
The crystalline complex of claim 1, which is produced by contacting the aromatic polyamide with 2-pyrrolidone to form a crystalline complex and then removing the excess of 2-pyrrolidone which is not contained in the crystal and which shows reflections at X-ray diffraction angles (2θ) of 11.0°, 17.4°, 18.4°, 20.2°, 21.0°, 23.2°, 25.0°, 26.2° and 27.4°.
Claim 11
Independent Claim
116 words
A method for producing a crystalline complex, which comprises contacting an aromatic polyamide with at least one member selected from the group consisting of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam and 2-pyrrolidone to form a crystalline complex, which consist essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide, wherein said crystalline complex has a maximum melting point of 156° C; and then removing the excess of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam, or 2-pyrrolidone which is not contained in the crystal.
Claim 12
Independent Claim
116 words
A method for producing a crystalline complex, which comprises contacting an aromatic polyamide with at least one member selected from the group consisting of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam and 2-pyrrolidone to form a crystalline complex, which consist essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide, wherein said crystalline complex has a maximum melting point of 156° C; and then removing the excess of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam, or 2-pyrrolidone which is not contained in the crystal.
Claim 13
Dependent Claim
61 words
The method of claim 10, which comprises contacting the aromatic polyamide (A) with at least one member selected from the group consisting of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam and 2-pyrrolidone (B) at a molar ratio (B)/(A) of at least 1 and a weight ratio (B)/(A) of not more than 10 at a temperature of 25°-150° C for 3 minutes - 60 hours.
Claim 14
Dependent Claim
26 words
The method of claim 10, wherein an excess of hexamethylphosphoric amide, N-methylpyrrolidone, ε-caprolactam of 2-pyrrolidone which is not contained in the crystal is removed by centrifuging.
Claim 15
Dependent Claim
26 words
The method of claim 10, wherein the excess hexamethylphosphoric acid amide, N-methylpyrrolidone, ε-caprolactam or 2-pyrrolidone which is not contained in said crystal is removed by filtration.
Claim 16
Dependent Claim
34 words
The method of claim 10, wherein the excess hexamethylphosphoric acid amide, N-methylpyrrolidone, ε-caprolactam or 2-pyrrolidone which is not contained in said crystal is removed by distillation at a temperature of less than 150° C.
Claim 17
Dependent Claim
33 words
The method of claim 10, wherein the excess hexamethylphosphoric acid amide, N-methylpyrrolidone, ε-caprolactam of 2 -pyrrolidone which is not contained in said crystal is removed by concentrating at temperature lower than 150° C.
Claim 18
Dependent Claim
72 words
A binder for a non-woven fabric or paper product comprising a crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
Claim 19
Dependent Claim
72 words
A binder for a non-woven fabric or paper product comprising a crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
Claim 20
Dependent Claim
70 words
A fiber or film obtained by melt extruding a crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
Claim 21
Dependent Claim
70 words
A fiber or film obtained by melt extruding a crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
Claim 22
Dependent Claim
66 words
A filter medium from the crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
Claim 23
Dependent Claim
66 words
A filter medium from the crystalline complex having a maximum melting point of about 156° C which consists essentially of an aromatic polyamide and from 0.3 to 2.5 moles of at least one member selected from the group consisting of hexamethylphosphoric amide, N-methyl-2-pyrrolidone, ε-caprolactam and 2-pyrrolidone per mole of said aromatic polyamide, at least 75 mol % of repeating unit of said aromatic polyamide being m-phenyleneisophthalamide.
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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |