US4524191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester composition and production thereof
Assignee: Asahi Kasei Corp
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Filing: 1983-01-31
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Granted: 1985-06-18
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Expires: 2003-01-31
Abstract
Abstract A polyester composition for molding having improved molding properties is disclosed, comprising 100 parts by weight of a polyester comprising mainly polyethylene terephthalate and 0.05 to 10 parts by weight of an aromatic polyamide as a nucleating agent which is uniformly dispersed in the polyester in a substantial size of 50 μm or less. A process for producing the polyester composition is also disclosed.
Inventors
- 👤 Katuyuki Nakamura
- 👤 Kazuya Neki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:00
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
222 words
An injection moldable polyester composition having an increased crystallization rate comprising: (A) 100 parts by weight of a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3; and (B) from 0.1 to 5 parts by weight of at least one wholly aromatic polyamide, as a nucleating agent, having a melting point of at least 300° C. and containing at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic group; (2) a dicarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, wherein said component (B) is uniformly dispersed as a distinct phase in said component (A), after blending with component (A), in a substantial size of 50 μm or less, and a half width of an exothermic peak of the polyester composition measured in a crystallization temperature range by a differential scanning calorimeter at a cooling rate of 10° C./min is 15° C. or less per 8 mg of component (A), whereby the crystallization rate of said polyester comprising mainly polyethylene terephthalate is increased.
Claim 2
Dependent Claim
222 words
An injection moldable polyester composition having an increased crystallization rate comprising: (A) 100 parts by weight of a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3; and (B) from 0.1 to 5 parts by weight of at least one wholly aromatic polyamide, as a nucleating agent, having a melting point of at least 300° C. and containing at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic group; (2) a dicarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, wherein said component (B) is uniformly dispersed as a distinct phase in said component (A), after blending with component (A), in a substantial size of 50 μm or less, and a half width of an exothermic peak of the polyester composition measured in a crystallization temperature range by a differential scanning calorimeter at a cooling rate of 10° C./min is 15° C. or less per 8 mg of component (A), whereby the crystallization rate of said polyester comprising mainly polyethylene terephthalate is increased.
Claim 3
Dependent Claim
15 words
A composition as in claim 1, wherein said half width is 10° C. or less.
Claim 4
Dependent Claim
28 words
A composition as in claim 1, which further contains from 2 to 200 parts by weight of (C) reinforcing fiber per 100 parts by weight of component (A).
Claim 5
Dependent Claim
14 words
A composition as in claim 3, wherein said reinforcing fiber (C) is glass fiber.
Claim 6
Dependent Claim
187 words
A process for preparing a polyester composition comprising (A) 100 parts by weight of a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3; and (B) from 0.05 to 10 parts by weight of at least one aromatic polyamide containing at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic group; (2) a dicarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, which comprises dissolving or suspending said at least one aromatic polyamide in a solvent, mixing therewith from 0.5 to 10 parts by weight, per part by weight of said aromatic polyamide, of a dispersing aid, causing co-precipitation of said aromatic polyamide and said dispersing aid and dispersing the precipitate in a polyester comprising mainly polyethylene terephthalate having a reduced specific viscosity (ηsp/c) of at least 0.3.
Claim 7
Dependent Claim
187 words
A process for preparing a polyester composition comprising (A) 100 parts by weight of a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3; and (B) from 0.05 to 10 parts by weight of at least one aromatic polyamide containing at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic group; (2) a dicarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, which comprises dissolving or suspending said at least one aromatic polyamide in a solvent, mixing therewith from 0.5 to 10 parts by weight, per part by weight of said aromatic polyamide, of a dispersing aid, causing co-precipitation of said aromatic polyamide and said dispersing aid and dispersing the precipitate in a polyester comprising mainly polyethylene terephthalate having a reduced specific viscosity (ηsp/c) of at least 0.3.
Claim 8
Dependent Claim
222 words
A process for manufacturing moldings by melting a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3 and molding it using an injection mold, which comprises, to increase the crystallization rate of said polyester, uniformly dispersing as a distinct phase which is present after blending in said polyester, in a substantial size of 50 μm or less, prior to said melting procedure, from 0.1 to 5 parts by weight, per 100 parts by weight of said polyester, of at least one wholly aromatic polyamide, as a nucleating agent, having a melting point of at least 300° C. and comprising at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic groups; (2) a discarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, so that a half width of an exothermic peak of the resulting polyester composition measured in a crystallization range by a differential scanning calorimeter at a cooling rate of 10° C./min is 15° C. or less per 8 mg of said polyester.
Claim 9
Dependent Claim
222 words
A process for manufacturing moldings by melting a polyester comprising mainly polyethylene terephthalate and having a reduced specific viscosity (ηsp/c) of at least 0.3 and molding it using an injection mold, which comprises, to increase the crystallization rate of said polyester, uniformly dispersing as a distinct phase which is present after blending in said polyester, in a substantial size of 50 μm or less, prior to said melting procedure, from 0.1 to 5 parts by weight, per 100 parts by weight of said polyester, of at least one wholly aromatic polyamide, as a nucleating agent, having a melting point of at least 300° C. and comprising at least one of (1) a diamine group represented by the formula (I) --NH--Ar.sub.1 --NH-- (I) wherein Ar 1 represents a divalent aromatic groups; (2) a discarboxylic acid group represented by the formula (II) --CO--Ar.sub.2 --CO-- (II) wherein Ar 2 represents a divalent aromatic group; and (3) an aminocarboxylic acid group represented by the formula (III) --NH--Ar.sub.3 --CO-- (III) wherein Ar 3 represents a divalent aromatic group, linked to each other through amido bonds, so that a half width of an exothermic peak of the resulting polyester composition measured in a crystallization range by a differential scanning calorimeter at a cooling rate of 10° C./min is 15° C. or less per 8 mg of said polyester.
Claim 10
Dependent Claim
20 words
A process as in claim 6, wherein molding is conducted at a metal mold temperature of 120° C. or less.
Claim 11
Dependent Claim
28 words
A composition as in claim 3, wherein the amount of reinforcing fiber is from 4 to 100 parts by weight per 100 parts by weight of component (A).
Claim 12
Dependent Claim
28 words
A composition as in claim 1, which contains 0.1 to 3 parts by weight of said aromatic polyamide component (B) per 100 parts by weight of component (A).
Claim 13
Dependent Claim
26 words
A composition as in claim 1, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 14
Dependent Claim
26 words
A composition as in claim 2, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 15
Dependent Claim
26 words
A composition as in claim 1, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 16
Dependent Claim
87 words
A composition as in claim 1, wherein said at least one wholly aromatic polyamide is selected from the group consisting of: (i) polyamides comprised of the diamine group represented by the formula (I) and the dicarboxylic acid group represented by the formula (II) wherein Ar 1 is p-phenylene, 4,4'-methylenediphenylene or 4,4'-oxydiphenylene and Ar 2 is p-phenylene, or Ar 1 is p-phenylene or 1,5-naphthylene and Ar 2 is m-phenylene; and (ii) polyamides comprised of the aminocarboxylic acid group represented by the formula (III) wherein Ar 3 is p-phenylene.
Claim 17
Dependent Claim
15 words
A composition as in claim 13, wherein said half width is 10° C. or less.
Claim 18
Dependent Claim
28 words
A composition as in claim 13, which further contains from 2 to 200 parts by weight of (C) reinforcing fiber per 100 parts by weight of component (A).
Claim 19
Dependent Claim
14 words
A composition as in claim 15, wherein said reinforcing fiber (C) is glass fiber.
Claim 20
Dependent Claim
28 words
A composition as in claim 15, wherein the amount of reinforcing fiber is from 4 to 100 parts by weight per 100 parts by weight of component (A).
Claim 21
Dependent Claim
28 words
A composition as in claim 13, which contains 0.1 to 3 parts by weight of said aromatic polyamide component (B) per 100 parts by weight of component (A).
Claim 22
Dependent Claim
26 words
A composition as in claim 13, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 23
Dependent Claim
26 words
A composition as in claim 14, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 24
Dependent Claim
26 words
A composition as in claim 13, wherein said component (B) is uniformly dispersed in said component (A) in a substantial size of 3 μm or less.
Claim 25
Dependent Claim
87 words
A process as in claim 5, wherein said at least one wholly aromatic polyamide is selected from the group consisting of: (i) polyamides comprised of the diamine group represented by the formula (I) and the dicarboxylic acid group represented by the formula (III) wherein Ar 1 is p-phenylene, 4,4'-methylenediphenylene or 4,4'-oxydiphenylene and Ar 2 is p-phenylene, or Ar 1 is p-phenylene or 1,5-naphthylene and Ar 2 is m-phenylene; and (ii) polyamides comprised of the aminocarboxylic acid group represented by the formula (III) wherein Ar 3 is p-phenylene.
Claim 26
Dependent Claim
87 words
A process as in claim 6, wherein said at least one wholly aromatic polyamide is selected from the group consisting of: (i) polyamides comprised of the diamine group represented by the formula (I) and the dicarboxylic acid group represented by the formula (II) wherein Ar 1 is p-phenylene, 4,4'-methylenediphenylene or 4,4'-oxydiphenylene and Ar 2 is p-phenylene, or Ar 1 is p-phenylene or 1,5-naphthylene and Ar 2 is m-phenylene; and (ii) polyamides comprised of the aminocarboxylic acid group represented by the formula (III) wherein Ar 3 is p-phenylene.
Claim 27
Dependent Claim
20 words
A process as in claim 23, wherein molding is conducted at a metal mold temperature of 120° C. or less.
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) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |