EP0394029A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fiber-filled polyphthalamide composition
Assignee: BP Corp North America Inc
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Filing: 1990-04-19
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Granted: —
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Expires: 2010-04-19
Abstract
Abstract Improved polyphthalamide compositions, particularly for injection molding applications, comprise a polyphthalamide component with at least two recurring units selected from terephthalamide, isophthalamide and adipamide units and having high heat deflection temperature when filled with glass fibers; reinforcing fibers; and effective amounts of particulate talc. Molded articles prepared from such compositions exhibit excellent mechanical and thermal properties, including high heat deflection temperature, even when molded using molds heated below Tg of the polyphthalamide component, often facilitating molding using steam or hot water-heated molds.
Inventors
- 👤 David Peter Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 11:00
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C08L; C08L77/00; C08L77/06; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265; C08K7/00; C08K7/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
93 words
A composition comprising (i) a polyphthalamide component comprising at least two recurring units selected from terephthalamide units, isophthalamide units and adipamide units and which, when filled with 33 weight percent glass fibers, has a heat deflection temperature at 264 psi (1.82 MPa), according to ASTM D-648, of at least about 240°C; (ii) about 10 to about 200 parts by weight reinforcing fibers per hundred parts by weight of the polyphthalamide component; and (iii) at least about 0.01 to 5 parts by weight particulate talc per hundred parts by weight of the polyphthalamide component.
Claim 2
Dependent Claim
93 words
A composition comprising (i) a polyphthalamide component comprising at least two recurring units selected from terephthalamide units, isophthalamide units and adipamide units and which, when filled with 33 weight percent glass fibers, has a heat deflection temperature at 264 psi (1.82 MPa), according to ASTM D-648, of at least about 240°C; (ii) about 10 to about 200 parts by weight reinforcing fibers per hundred parts by weight of the polyphthalamide component; and (iii) at least about 0.01 to 5 parts by weight particulate talc per hundred parts by weight of the polyphthalamide component.
Claim 3
Dependent Claim
26 words
The composition of Claim 1 containing about 0.01 to about 2 parts by weight of the talc per hundred part by weight of the polyphthalamide component.
Claim 4
Dependent Claim
48 words
The composition of Claim 1 or Claim 2 wherein the polyphthalamide component comprises at least two recurring units selected from: wherein R, R₁ and R₂ independently comprise a straight chain or cyclic aliphatic divalent radical which is unsubstituted or has up to one methyl substituent per carbon atom.
Claim 5
Dependent Claim
12 words
The composition of Claim 3 wherein R, R₁ and R₂ comprise hexamethylene.
Claim 6
Dependent Claim
26 words
The composition of Claim 3 or Claim 4 wherein the mole ratio of dicarboxylic acid moieties in the units A, B and C is about 65-95:25-0:35-5.
Claim 7
Dependent Claim
26 words
The composition of Claim 3 or Claim 4 wherein the mole ratio of dicarboxylic acid moieties in the units A, B and C is about 40-65:0-15:20-60.
Claim 8
Dependent Claim
26 words
The composition of Claim 3 or Claim 4 wherein the mole ratio of dicarboxylic acid moieties in the units A, B and C is about 70-99:30-1:0.
Claim 9
Dependent Claim
13 words
The composition of any preceding claim wherein the reinforcing fibers comprise glass fibers.
Claim 10
Dependent Claim
46 words
The composition of Claim 8 containing about 15 to about 100 parts by weight glass fibers per hundred parts by weight of the polyphthalamide component and about 0.1 to about 2 parts by weight of the talc per hundred parts by weight of the polyphthalamide component.
Claim 11
Dependent Claim
66 words
A composition according to Claim 1 comprising recurring units: such that the mole ratio of the dicarboxylic acid moieties in such units A:B:C is about 65-95:25-0:35-5; (ii) about 15 to about 100 parts by weight glass fibers per part by weight of the polyphthalamide component; and (iii) about 0.1 to about 2 parts by weight particulate talc per hundred parts by weight of the polyphthalamide component.
Claim 12
Dependent Claim
24 words
The composition of Claim 10 wherein the mole ratio of the dicarboxylic acid moieties in the units A, B and C is about 65:25:10.
Claim 13
Dependent Claim
45 words
The composition of any preceding claim additionally comprising about 0.01 to about 2 parts by weight per hundred parts by weight of the polyphthalamide component of a heat stabilizer selected from the group consisting of potassium iodide, sodium iodide and combinations thereof with cupric acetate.
Claim 14
Dependent Claim
43 words
The composition of any preceding claim additionally comprising about 0.01 to about 5 parts by weight per hundred parts by weight of the composition of a mold release agent selected from the group consisting of aluminium distearate, hexamethylene bis-stearamide wax and combinations thereof.
Claim 15
Dependent Claim
10 words
A molded article comprising the composition of any preceding claim.
Claim 16
Independent Claim
81 words
A method for preparing a molded article comprising heating a composition according to any of Claims 1 to 13 to at least the melting point of the polyphthalamide component of the composition, injecting the heated composition into a mold heated to a temperature ranging from about 20°C below Tg of the polyphthalamide component to about 20°C above said Tg, maintaining the composition in the mold for a time effective to solidify the polyphthalamide and removing a molded article from the mold.
Claim 17
Dependent Claim
26 words
The method of Claim 15 wherein the polyphthalamide component has a Tg up to about 125°C and the mold is a steam- or hot water-heated mold.
Claim 18
Dependent Claim
67 words
A method for preparing a molded article comprising heating a composition according to Claim 10 to about 300 to about 400°C to melt the polyphthalamide component of the composition, injecting the heated composition into a mold heated to about 60° to about 200°C and maintaining the composition in the mold for a time effective to solidify the polyphthalamide component and removing a molded article from the mold.
Claim 19
Dependent Claim
36 words
The method of Claim 17 wherein the polyphthalamide component has a Tg of about 80 to about 125°C, mold temperature is up to about 100°C ±10°C and the mold is a steam- or hot water-heated mold.
References Cited (Backward Citations)
No citation records indexed.
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