Patent EP0307993A1 successfully refreshed from Google Patents.
EP0307993A1
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Composites comprising an aramid matrix
Assignee: Akzo NV
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Filing: 1988-09-02
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Granted: —
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Expires: 2008-09-02
Abstract
Abstract A combination of 10-80% by volume of reinforcing fibres and 20-90% by volume of thermoplastic fibres or films suitable to be formed into a composite structure, the thermoplastic fibres or films essentially consisting of an amorphous copolyamide built up of units derived from at least two different dicarboxylic acids and at least two different diamines, of which the divalent aromatic radicals are linked together by amide bonds selected from the groups P1, P2, Q1 and Q2, P1: 1,4-phenylene, 1,5-naphthylene, 2,6-naphthylene and 4,4′-diphenylene; P2: radicals of the formula: where X = -C(Y)(Y′)-, -O-, -S-, -SO₂- or -CO-, and Y, Y′ are the same or different and represents hydrogen or C₁₋₄ alkyl, or together cyclohexyl; Q1: 1,3-phenylene, 1,6-naphthylene, 2,7-naphthylene and 3,4′-diphenylene; Q2: radicals of the formula: where X = -C(Y) (Y′)-, -O-, -S-, -SO₂- or -CO- and Y, Y′ are the same or different and represent hydrogen or C₁₋₄ alkyl, or together cyclohexyl; each group including the radicals which per aromatic ring comprise 1-4 substituents R, where R may be the same or different and may stand for C₁₋₄ alkyl, C₁₋₄ alkoxy, Cl, F, aryl, ortho-fused benzeno or aryl-C₁₋₄-alkyl, with the proviso that expressed as the mole fraction of the total of amide bonds the proportion of none of the monomer units is higher than 0,32, the proportion of radicals selected from the groups P1 and P2 together is in the range of 0,18 to 0,82, the proportion of the radicals selected from the groups Q1 and Q2 together is in the range of 0,18 to 0,82, and the proportion of the radicals from the group Q2 is at least 0,15. The said combination is suitable for forming a composite structure.
Inventors
- 👤 Doetze Jakob Sikkema
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 17:39
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/046; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265; C08G69/32; C08J2377/00; C08J2377/10; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249945; Y10T428/249946
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
269 words
A combination of 10-80% by volume of reinforcing fibres and 20-90% by volume of thermoplastic fibres or films suitable to be formed into a composite structure, the thermoplastic fibres or films essentially consisting of an amorphous copolyamide build up of units derived from at least two different dicarboxylic acids and at least two different diamines, of which the divalent aromatic radicals are linked together by amide bonds selected from the groups P1, P2, Q1 and Q2, P1: 1,4-phenylene, 1,5-naphthylene, 2,6-napthylene and 4,4′-diphenylene: P2: radicals of the formula: where X = -C(Y) (Y′)-, -O-, -S-, -SO₂- or -CO-, and Y,Y′ are the same or different and represent hydrogen or C₁₋₄ alkyl, or together cyclohexyl; Q1: 1,3-phenylene, 1,6-naphthylene, 2,7-napthylene and 3,4′-diphenylene; Q2: radicals of the formula: where X = -C(Y) (Y′)-, -O-, -S-, -SO₂- or -CO- and Y, Y′ are the same or different and represent hydrogen or C₁-₄ alkyl, or together cyclohexyl; each group including the radicals which per aromatic ring comprise 1-4 substituents R, where R may be the same or different and may stand for C₁₋₄ alkyl, C₁₋₄ alkoxy, Cl, F, aryl, ortho-fused benzeno or aryl-C₁₋₄-alkyl, with the proviso that expressed as the mole fraction of the total of amide bonds the proportion of none of the monomer units is higher than 0,32, the proportion of radicals selected from the groups P1 and P2 together is in the range of 0,18 to 0,82, the proportion of the radicals selected from the groups Q1 and Q2 together is in the range of 0.18 to 0,82, and the proportion of the radicals from the group Q2 is at least 0,15.
Claim 2
Dependent Claim
269 words
A combination of 10-80% by volume of reinforcing fibres and 20-90% by volume of thermoplastic fibres or films suitable to be formed into a composite structure, the thermoplastic fibres or films essentially consisting of an amorphous copolyamide build up of units derived from at least two different dicarboxylic acids and at least two different diamines, of which the divalent aromatic radicals are linked together by amide bonds selected from the groups P1, P2, Q1 and Q2, P1: 1,4-phenylene, 1,5-naphthylene, 2,6-napthylene and 4,4′-diphenylene: P2: radicals of the formula: where X = -C(Y) (Y′)-, -O-, -S-, -SO₂- or -CO-, and Y,Y′ are the same or different and represent hydrogen or C₁₋₄ alkyl, or together cyclohexyl; Q1: 1,3-phenylene, 1,6-naphthylene, 2,7-napthylene and 3,4′-diphenylene; Q2: radicals of the formula: where X = -C(Y) (Y′)-, -O-, -S-, -SO₂- or -CO- and Y, Y′ are the same or different and represent hydrogen or C₁-₄ alkyl, or together cyclohexyl; each group including the radicals which per aromatic ring comprise 1-4 substituents R, where R may be the same or different and may stand for C₁₋₄ alkyl, C₁₋₄ alkoxy, Cl, F, aryl, ortho-fused benzeno or aryl-C₁₋₄-alkyl, with the proviso that expressed as the mole fraction of the total of amide bonds the proportion of none of the monomer units is higher than 0,32, the proportion of radicals selected from the groups P1 and P2 together is in the range of 0,18 to 0,82, the proportion of the radicals selected from the groups Q1 and Q2 together is in the range of 0.18 to 0,82, and the proportion of the radicals from the group Q2 is at least 0,15.
Claim 3
Dependent Claim
50 words
A combination according to claim 1, in which the proportion of the radicals selected from the groups P1 and P2 together is in the range of 0,36 to 0,74 and the proportion of the radicals from the groups Q1 and Q2 together is in the range of 0,36 to 0,74.
Claim 4
Dependent Claim
49 words
A combination according to claim 1 or 2, characterized in that the amorphous aromatic copolyamide is essentially build up of two dicarboxylic acids and two diamines, at least one of which comprises a radical from the group Q2 and at least one radical from the groups P1 and P2.
Claim 5
Dependent Claim
24 words
A combination according to claim 3, characterized in that the proportion of each of the monomers is in the range of 0,22 to 0,28.
Claim 6
Dependent Claim
46 words
A combination according to claim 3 or 4, characterized in that one of the two dicarboxylic acids and one of the two diamines each comprise a radical from the groups P1 and P2, and the others each comprise a radical from the groups Q1 and Q2.
Claim 7
Dependent Claim
31 words
A combination according to any one of the claims 1-5, characterized in that the thermoplastic fibres essentially consist of a copolyamide of p-phenylene diamine, bis (4-aminophenyl)methane, isophthalic acid and terephthalic acid.
Claim 8
Dependent Claim
31 words
A combination according to one or more of the claims 1-6, characterized in that the thickness of the thermoplastic fibres or films is in the range of 5 to 200 µm.
Claim 9
Dependent Claim
24 words
A combination according to any one of the claims 1-7, characterized in that it comprises the thermoplastic fibres in the form of endless yarn.
Claim 10
Dependent Claim
24 words
A combination according to any one of the claims 1-7, characterized in that it comprises the thermoplastic fibres in the form of staple yarn.
Claim 11
Dependent Claim
29 words
A combination according to any one of the claims 1-9, in which the reinforcing fibres are aramid fibres, carbon fibres, glass fibres, boron fibres, ceramic fibres or metallic fibres.
Claim 12
Dependent Claim
26 words
A combination according to any one of the claims 1-10, in which use is made of reinforcing fibres coated with a solution of the amorphous copolyamide.
Claim 13
Dependent Claim
21 words
A composite structure obtained by shaping under pressure and with heating the combination according to any one of the claims 1-11.
Claim 14
Dependent Claim
41 words
A composite structure according to claim 12, in the form of an endless belt of the copolyamide according to any one of the claims 1-11 as matrix, in which reinforcing fibres are embedded mainly in the longitudinal direction of the belt.
Claim 15
Dependent Claim
59 words
A copolyamide which expressed as the mole fraction of the total of amide bonds is built up of 0,22-0,28 units derived from terephthalic acid, 0,22-0,28 units derived from paraphenylene diamine, 0,22-0,28 units derived from isophthalic acid and 0,22-0,28 units derived from a 3,3′- or 4,4′-diamine of diphenyl methane, diphenylpropane-2,2, diphenyl cyclohexane-1,1, diphenyl ether, diphenyl sulphide, diphenyl sulphone, or benzophenone.
Claim 16
Dependent Claim
59 words
A copolyamide which expressed as the mole fraction of the total of amide bonds is built up of 0,22-0,28 units derived from terephthalic acid, 0,22-0,28 units derived from paraphenylene diamine, 0,22-0,28 units derived from isophthalic acid and 0,22-0,28 units derived from a 3,3′- or 4,4′-diamine of diphenyl methane, diphenylpropane-2,2, diphenyl cyclohexane-1,1, diphenyl ether, diphenyl sulphide, diphenyl sulphone, or benzophenone.
References Cited (Backward Citations)
FR2355864A1
Cited
EP0099997A1
Cited
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