US4532275A
Expired / Lapsed
US
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Fiber-reinforced composite materials
Assignee: Teijin Ltd
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Filing: 1982-01-29
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Granted: 1985-07-30
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Expires: 2002-01-29
Abstract
Abstract A fiber-reinforced composite material comprising a resin and 20 to 90% by weight, based on the composite material, of reinforcing fibers, said reinforcing fibers comprising fibers of a wholly aromatic polyamide consisting essentially of (1) structural units of the formula ##STR1## and (2) structural units of the formula ##STR2## and/or structural units of the formula ##STR3## wherein X represents a halogen atom and n is an integer of from 1 to 3.
Inventors
- 👤 Yuzo Aito
- 👤 Keizo Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:40
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08J; C08J5/00; C08J5/04; C08J5/24; C08J5/246; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K2201/00; H05K2201/02; H05K2201/0275; H05K2201/0278; H05K2201/03; H05K2201/032; H05K2201/0323; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249947; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31725; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3528; Y10T442/3569; Y10T442/3585
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
72 words
A fiber-reinforced composite material comprising a resin and 20 to 90% by weight, based on the composite material, of reinforcing fibers, said reinforcing fibers comprising fibers of a wholly aromatic polyamide consisting essentially of (1) structural units of the formula ##STR12## and (2) structural units of the formula ##STR13## and/or structural units of the formula ##STR14## wherein X represents a halogen atom and n is an integer of from 1 to 3.
Claim 2
Dependent Claim
72 words
A fiber-reinforced composite material comprising a resin and 20 to 90% by weight, based on the composite material, of reinforcing fibers, said reinforcing fibers comprising fibers of a wholly aromatic polyamide consisting essentially of (1) structural units of the formula ##STR12## and (2) structural units of the formula ##STR13## and/or structural units of the formula ##STR14## wherein X represents a halogen atom and n is an integer of from 1 to 3.
Claim 3
Dependent Claim
21 words
The composite material of claim 1 wherein the reinforcing fibers are substantially composed of the fibers of the wholly aromatic polyamide.
Claim 4
Dependent Claim
22 words
The composite material of claim 1 wherein the reinforcing fibers are composed substantially of said wholly aromatic polyamide fibers and carbon fibers.
Claim 5
Dependent Claim
32 words
The composite material of any one of claims 1 to 3 wherein said wholly aromatic polyamide consists substantially of the structural units of formula (A) and the structural units of formula (B).
Claim 6
Dependent Claim
39 words
The composite material of any one of claims 1, 2 or 3 wherein said wholly aromatic polyamide consists substantially of the structural units of formula (A), the structural units of formula (B) and the structural units of formula (C).
Claim 7
Dependent Claim
21 words
The composite material of claim 1 wherein the structural units of formula (A) are units represented by the following formula ##STR15##
Claim 8
Dependent Claim
15 words
The composite material of claim 1 wherein in formula (C), X is a chlorine atom.
Claim 9
Dependent Claim
47 words
The composite material of claim 1 wherein said wholly aromatic polyamide consists of 5 to 95 mole% of the structural units of formula (A), 0 to 95 mole% of the structural units of formula (B) and 0 to 95 mole% of the structural units of formula (C).
Claim 10
Dependent Claim
34 words
The composite material of claim 3 wherein the reinforcing fibers are composed of 10 to 90% by weight of the wholly aromatic polyamide fibers and 90 to 10% by weight of the carbon fibers.
Claim 11
Dependent Claim
17 words
The composite material of claim 1 wherein the resin is a cured product of a curable resin.
Claim 12
Dependent Claim
14 words
The composite material of claim 10 wherein the curable resin is a thermocurable resin.
Claim 13
Dependent Claim
13 words
The composite material of claim 1 wherein the resin is a thermoplastic resin.
Claim 14
Dependent Claim
13 words
The composite material of claim 1 wherein the reinforcing fibers are long fibers.
Claim 15
Dependent Claim
13 words
The composite material of claim 1 wherein the reinforcing fibers are short fibers.
Claim 16
Dependent Claim
27 words
The composite material of claim 1 wherein the amount of the reinforcing fibers is 30 to 85% by weight based on the weight of the composite material.
Claim 17
Dependent Claim
14 words
The composite material of claim 1 which is in the form of a sheet.
Claim 18
Dependent Claim
20 words
The composite material of claim 1 which is in the form of a three-dimensional shaped article suitable for ultimate uses.
Claim 19
Dependent Claim
63 words
A fiber-reinforced composite material composed substantially of a cured product of a thermocurable resin and 30 to 85% by weight, based on the composite material, of fibers of an wholly aromatic polyamide, said wholly aromatic polyamide consisting of 20 to 60 mole% of structural units of the following formula ##STR16## and 80 to 40 mole% of structural units of the following formula ##STR17##
Claim 20
Dependent Claim
63 words
A fiber-reinforced composite material composed substantially of a cured product of a thermocurable resin and 30 to 85% by weight, based on the composite material, of fibers of an wholly aromatic polyamide, said wholly aromatic polyamide consisting of 20 to 60 mole% of structural units of the following formula ##STR16## and 80 to 40 mole% of structural units of the following formula ##STR17##
Claim 21
Dependent Claim
74 words
A fiber-reinforced composite material composed substantially of a cured product of a thermocurable resin and 30 to 85% by weight, based on the composite material, of fibers of a wholly aromatic polyamide, said wholly aromatic polyamide consisting of 15 to 50 mole% of structural units of the following formula ##STR18## 0to 80 mole% of structural units of the following formula ##STR19## and 5 to 85 mole% of structural units of the following formula ##STR20##
Claim 22
Dependent Claim
74 words
A fiber-reinforced composite material composed substantially of a cured product of a thermocurable resin and 30 to 85% by weight, based on the composite material, of fibers of a wholly aromatic polyamide, said wholly aromatic polyamide consisting of 15 to 50 mole% of structural units of the following formula ##STR18## 0to 80 mole% of structural units of the following formula ##STR19## and 5 to 85 mole% of structural units of the following formula ##STR20##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-29 | 1989-01-28 | 1989-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-29 | 1993-01-28 | 1993-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-29 | 1997-01-28 | 1997-07-30 | $7700.00 | Window Closed / Lapsed |