US4290935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly rigid polyamide composition
Assignee: Toray Industries Inc
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Filing: 1979-10-25
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Granted: 1981-09-22
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Expires: 1999-10-25
Abstract
Abstract A highly rigid poly-ε-caproamide composition containing about 50 to 5000 ppm of barium combined with the poly-ε-caproamide, and having a γ-type crystal ratio of about 0.3 to 0.7 is disclosed. The polyamide has improved rigidity without loss of other advantageous mechanical properties of poly-ε-caprolactam. By addition of an aluminum compound, the rigidity of the composition can be further improved. A bisamide compound may be added to provide excellent mold release without harming the mechanical properties of the composition.
Inventors
- 👤 Toshio Muraki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:51
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08L; C08L77/00; C08L77/02
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
37 words
A highly rigid polyamide which comprises poly-ε-caprolactam containing about 50 to 5000 ppm of combined barium, said barium combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase.
Claim 2
Dependent Claim
37 words
A highly rigid polyamide which comprises poly-ε-caprolactam containing about 50 to 5000 ppm of combined barium, said barium combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase.
Claim 3
Dependent Claim
17 words
A polyamide composition of claim 1 wherein the amount of combined barium is 500 to 2000 ppm.
Claim 4
Dependent Claim
47 words
A highly rigid polyamide which comprises poly-ε-caprolactam containing about 50 to 5000 ppm of barium and about 2 to 200 ppm of aluminum, at least said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.4 to 0.9 in the crystalline phase.
Claim 5
Dependent Claim
47 words
A highly rigid polyamide which comprises poly-ε-caprolactam containing about 50 to 5000 ppm of barium and about 2 to 200 ppm of aluminum, at least said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.4 to 0.9 in the crystalline phase.
Claim 6
Dependent Claim
17 words
A highly rigid polyamide of claim 3 wherein the amount of aluminum is 4 to 40 ppm.
Claim 7
Dependent Claim
111 words
A highly rigid polyamide molding composition which comprises 100 parts by weight of poly-ε-caprolactam containing about 50 to 5000 ppm of barium, said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase and about 0.005 to 1 part by weight of a bisamide compound represented by the following general formula ##STR2## wherein R 1 represents a divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 and R 3 represent monovalent hydrocarbon groups having 10 to 30 carbon atoms, and R 4 and R 5 represent hydrogen or a monovalent hydrocarbon group having 1 to 4 carbon atoms.
Claim 8
Dependent Claim
111 words
A highly rigid polyamide molding composition which comprises 100 parts by weight of poly-ε-caprolactam containing about 50 to 5000 ppm of barium, said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase and about 0.005 to 1 part by weight of a bisamide compound represented by the following general formula ##STR2## wherein R 1 represents a divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 and R 3 represent monovalent hydrocarbon groups having 10 to 30 carbon atoms, and R 4 and R 5 represent hydrogen or a monovalent hydrocarbon group having 1 to 4 carbon atoms.
Claim 9
Dependent Claim
120 words
A highly rigid polyamide molding composition which comprises 100 parts by weight of poly-ε-caprolactam containing about 50 to 5000 ppm of barium and about 2 to 200 ppm of aluminum, at least said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.4 to 0.9 in the crystalline phase and about 0.005 to 1 part by weight of a bisamide compound represented by the following general formula ##STR3## wherein R 1 represents a divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 and R 3 represent monovalent hydrocarbon groups having 10 to 30 carbon atoms, and R 4 and R 5 represent hydrogen or monovalent hydrocarbon groups having 1 to 4 carbon atoms.
Claim 10
Dependent Claim
120 words
A highly rigid polyamide molding composition which comprises 100 parts by weight of poly-ε-caprolactam containing about 50 to 5000 ppm of barium and about 2 to 200 ppm of aluminum, at least said barium being combined with the poly-ε-caprolactam, and having a γ-type crystal ratio of about 0.4 to 0.9 in the crystalline phase and about 0.005 to 1 part by weight of a bisamide compound represented by the following general formula ##STR3## wherein R 1 represents a divalent hydrocarbon group having 1 to 10 carbon atoms, R 2 and R 3 represent monovalent hydrocarbon groups having 10 to 30 carbon atoms, and R 4 and R 5 represent hydrogen or monovalent hydrocarbon groups having 1 to 4 carbon atoms.
Claim 11
Dependent Claim
41 words
A process for producing a highly rigid polyamide which comprises treating poly-ε-caprolactam with an aqueous solution containing barium ions, said solution having a normality of about 0.01 to 1, heating the treated poly-ε-caprolactam to the molten state, and solidifying the same.
Claim 12
Dependent Claim
41 words
A process for producing a highly rigid polyamide which comprises treating poly-ε-caprolactam with an aqueous solution containing barium ions, said solution having a normality of about 0.01 to 1, heating the treated poly-ε-caprolactam to the molten state, and solidifying the same.
Claim 13
Dependent Claim
49 words
A process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of barium-ε-caprolate and Ba(OH) 2 wherein a poly-ε-caprolactam having γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase is obtained.
Claim 14
Dependent Claim
49 words
A process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of barium-ε-caprolate and Ba(OH) 2 wherein a poly-ε-caprolactam having γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase is obtained.
Claim 15
Dependent Claim
54 words
A process for producing a highly rigid polyamide which comprises melt-blending poly-ε-caprolactam containing about 50 to 5000 ppm of barium, said barium being combined with the poly-ε-carpolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 with an aluminum salt of an aliphatic carboxylic acid having about 2 to 20 carbon atoms.
Claim 16
Dependent Claim
54 words
A process for producing a highly rigid polyamide which comprises melt-blending poly-ε-caprolactam containing about 50 to 5000 ppm of barium, said barium being combined with the poly-ε-carpolactam, and having a γ-type crystal ratio of about 0.3 to 0.7 with an aluminum salt of an aliphatic carboxylic acid having about 2 to 20 carbon atoms.
Claim 17
Dependent Claim
73 words
A process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of Ba(OH) 2 and barium salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms and an aluminum compound selected from the group consisting of aluminum salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms, aluminum borate and aluminum hydroxide.
Claim 18
Dependent Claim
73 words
A process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of Ba(OH) 2 and barium salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms and an aluminum compound selected from the group consisting of aluminum salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms, aluminum borate and aluminum hydroxide.
Claim 19
Dependent Claim
24 words
The process according to claim 10 wherein a poly-ε-caprolactam having γ-type crystal ratio of about 0.3 to 0.7 in the crystalline phase is obtained.
Claim 20
Dependent Claim
20 words
The process according to claim 10 wherein a poly-ε-caprolactam containing 2 to 200 ppm of said aluminum salt is obtained.
Claim 21
Dependent Claim
46 words
The process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of barium-ε-caprolate and Ba(OH) 2 so as to produce a poly-ε-caprolactam containing about 50 to 5,000 ppm of combined barium.
Claim 22
Dependent Claim
46 words
The process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of barium-ε-caprolate and Ba(OH) 2 so as to produce a poly-ε-caprolactam containing about 50 to 5,000 ppm of combined barium.
Claim 23
Dependent Claim
85 words
The process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of Ba(OH) 2 and barium salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms and an aluminum compound selected from the group consisting of aluminum salts of an aliphatic carboxylic acid having 2 to 20 carbon atoms, aluminum borate and aluminum hydroxide so that the resulting poly-ε-carprolactam contains about 50 to 5,000 ppm of barium.
Claim 24
Dependent Claim
85 words
The process for producing a highly rigid polyamide which comprises melt-polymerizing ε-caprolactam to poly-ε-caprolactam in the presence of a barium compound selected from the group consisting of Ba(OH) 2 and barium salts of an aliphatic carboxylic acid having about 2 to 20 carbon atoms and an aluminum compound selected from the group consisting of aluminum salts of an aliphatic carboxylic acid having 2 to 20 carbon atoms, aluminum borate and aluminum hydroxide so that the resulting poly-ε-carprolactam contains about 50 to 5,000 ppm of barium.
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |