US4879328A
Expired / Lapsed
US
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Aromatic polyester composition and process for producing the same
Assignee: Toray Industries Inc
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Filing: 1988-05-13
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Granted: 1989-11-07
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Expires: 2008-05-13
Abstract
Abstract Disclosed is a polyester composition comprising (a) 100 parts by weight of an aromatic polyester; (b) 0.005-10 parts by weight of an epoxy compound of the formula (I): ##STR1## (wherein Ar means C 6 -C 20 aromatic group or C 6 l-C 20 alicyclic group, n means an integer of 0-20); and (c) 1-70 parts by weight of at least one elastomer which has at least one functional group selected from the group consisting of epoxy groups, carboxyl group, carboxylate ester groups, carboxylic acid amide groups, acid anhydride group, imide groups, carboxylate salt groups, hydroxyl group, amino group and cyano group, the elastomer having a tensile modulus of 1-6,000 kg/cm 2 . The polyester resin composition of the present invention can easily be molded and the obtained molded article excells in mechanical properties such as impact strength. The obtained molded article also excells in flowability and residence stability during the molding, and in hydrolysis stablity, resistance to thermal cycling and in weatherability.
Inventors
- 👤 Hiroo Karasawa
- 👤 Kiichi Kometani
- 👤 Kiyomi Okita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:55
CPC Classifications
C; C08; C08L; C08L63/00; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
110 words
A polyester composition comprising: (a) 100 parts by weight of an aromatic polyester; (b) 0.005-10 parts by weight of an epoxy compound of the formula (I): ##STR12## (wherein Ar means C 6 -C 20 aromatic group or C 6 -C 20 alicyclic group, n means an integer of 0-20); and (c) 1-70 parts by weight of at least one elastomer which has at least one functional group selected from the group consisting of epoxy groups, carboxyl group, carboxylate ester groups, carboxylic acid amide groups, acid anhydride group, imide groups, carboxylate salt groups, hydroxyl group, amino group and cyano group, the elastomer having a tensile modulus of 1-6,000 kg/cm 2 .
Claim 2
Dependent Claim
110 words
A polyester composition comprising: (a) 100 parts by weight of an aromatic polyester; (b) 0.005-10 parts by weight of an epoxy compound of the formula (I): ##STR12## (wherein Ar means C 6 -C 20 aromatic group or C 6 -C 20 alicyclic group, n means an integer of 0-20); and (c) 1-70 parts by weight of at least one elastomer which has at least one functional group selected from the group consisting of epoxy groups, carboxyl group, carboxylate ester groups, carboxylic acid amide groups, acid anhydride group, imide groups, carboxylate salt groups, hydroxyl group, amino group and cyano group, the elastomer having a tensile modulus of 1-6,000 kg/cm 2 .
Claim 3
Dependent Claim
26 words
The composition of claim 1, wherein the aromatic polyester has a relative viscosity of 1.10-2.0 at 25° C. when measured as a 0.5% solution in o-chlorophenol.
Claim 4
Dependent Claim
13 words
The composition of claim 1, wherein the aromatic polyester is a polyalkylene terephthalate.
Claim 5
Dependent Claim
13 words
The composition of claim 1, wherein the aromatic polyester is a polycyclohexanedimethylene terephthalate.
Claim 6
Dependent Claim
15 words
The composition of claim 3, wherein the polyalkylene terephthalate is polybutylene terephthalate or polyethylene terephthalate.
Claim 7
Dependent Claim
20 words
The composition of claim 1, wherein the Ar in the formula (I) is phenylene group, biphenylene group or naphthylene group.
Claim 8
Dependent Claim
15 words
The composition of claim 1, wherein the Ar in the formula (I) is 1,4-phenylene group.
Claim 9
Dependent Claim
17 words
The composition of claim 1, wherein the content of the epoxy compound is 0.05-5 parts by weight.
Claim 10
Dependent Claim
17 words
The composition of claim 1, wherein the content of the epoxy compound is 0.2-3 parts by weight.
Claim 11
Dependent Claim
19 words
The composition of claim 1, wherein the elastomer has a glass transition temperature of not higher than 0° C.
Claim 12
Dependent Claim
17 words
The composition of claim 1, wherein the tensile modulus of the elastomer is 5-2,000 kg/cm 2 .
Claim 13
Dependent Claim
16 words
The composition of claim 1, wherein the content of the elastomer is 3-40 parts by weight.
Claim 14
Dependent Claim
112 words
The composition of claim 1, wherein the elastomer is selected from the group consisting of: (i) glycidyl group-containing copolymers of an α-olefin and a glycidyl ester of an α,β-unsaturated acid; (ii) modified ethylene-based copolymers obtained by graft copolymerizing an ethylene-based polymer with 0.01 to 10% by weight of an unsaturated carboxylic acid or a derivative thereof; (iii) ethylene-based random copolymers of ethylene and an unsaturated carboxylic acid or a derivative thereof; (iv) acrylic polymers which may or may not contain a diene-based polymer; and (v) conjugated diene-based polymers having at least one functional group selected from the group consisting of hydroxyl group, carboxylic group, acid anhydride group, amino group and cyano group.
Claim 15
Dependent Claim
30 words
The composition of claim 13, wherein the α-olefin in the glycidyl group-containing copolymer is ethylene and the glycidyl ester of the α, β-unsaturated acid is glycidyl methacrylate and/or glycidyl acrylate.
Claim 16
Dependent Claim
39 words
The composition of claim 14, wherein at least one unsaturated monomer selected from the group consisting of C 1-C 10 alkyl acrylate, C 1 -C 10 alkyl methacrylate and vinyl acetate is further copolymerized to the glycidyl group-containing copolymer.
Claim 17
Dependent Claim
26 words
The composition of claim 13, wherein the content of the glycidyl ester of the α, β-unsaturated acid in the glycidyl group-containing copolymer is 0.1-50% by weight.
Claim 18
Dependent Claim
25 words
The composition of claim 13, wherein the content of the glycidyl ester of the α,β-unsaturated acid in the glycidyl group-containing copolymer is 1-25% by weight.
Claim 19
Dependent Claim
51 words
The composition of claim 13, wherein the unsaturated carboxylic acid or the derivative thereof in the modified ethylene-based copolymer is at least one member selected from the group consisting of C 3 -C 20 unsaturated carboxylic acids, acid anhydrides thereof, glycidyl esters thereof, imides thereof, amides thereof and metal salts thereof.
Claim 20
Dependent Claim
80 words
The composition of claim 13, wherein the ethylene-based polymer in the modified ethylene-based copolymer is selected from the group consisting of (A) copolymers of ethylene and propylene and/or butene-1; (B) copolymers of ethylene, propylene and/or butene-1 and C 6 -C 20 non-conjugated diene; (C) copolymers of ethylene and C 1 -C 10 alkylacrylate or C 1 -C 10 alkylmethacrylate; (D) copolymers of ethylene and saponified or non-saponified vinyl acetate; and (E) hydrogenated styrene-butadiene block copolymers or hydrogenated styrene-isoprene block copolymers.
Claim 21
Dependent Claim
90 words
The composition of claim 13, wherein the ethylene-based polymer in the modified ethylene-based copolymer is selected from the group consisting of ethylene/propylene copolymers, ethylene/propylene copolymers in which at least one non-conjugated diene of 1,4-hexadiene, dicyclopehtadiene, or ethylidene norbornane is further copolymerized, ethylene/butene-1 copolymers, ethylene/butene-1 copolymers in which at least one non-conjugated diene of 1,4-hexadiene, dicyclopehtadiene, or ethylidene norbornane is further copolymerized, ethylene/methyl acrylate copolymers, ethylene/ethyl acrylate copolymers, ethylene/butyl acrylate copolymers, ethylene/methyl methacrylate PG,50 copolymers, ethylene/vinyl acetate copolymers, saponified ethylene/vinyl acetate copolymers, hydrogenated styrene-butadiene block copolymers and hydrogenated styrene-isoprene block copolymers.
Claim 22
Dependent Claim
53 words
The composition of claim 13, wherein the unsaturated carboxylic acid or the derivative thereof in the modified ethylene-based copolymer is selected from the group consisting of acrylic acid, methacrylic acid, meleic acid, fumaric acid, itaconic acid, crotonic acid, tetrahydrophthalic acid, 5-norbornane-2,3-dicarboxylic acid, methylendomethylene tetrahydrophthalic acid and acid anhydrides, glycidyl esters and imides thereof.
Claim 23
Dependent Claim
37 words
The composition of claim 13, wherein the unsaturated carboxylic acid or the derivative thereof in the ethylene-based random copolymer is acrylic acid, methacrylic acid or a metal salt or a C 1 -C 8 alkyl ester thereof.
Claim 24
Dependent Claim
82 words
The composition of claim 13, wherein the acrylic polymer which may contain the diene-based polymer is a graft-copolymer which is obtained by graft copolymerizing at least one unsaturated monomer selected from the group consisting of acrylic acid, methacrylic acid, C 1 -C 8 alkylesters and glycidyl ester thereof, aromatic monovinyls and cyanated monovinyls with a graft base containing as its major constituent a C 1 -C 8 alkylacrylate or a C 1 -C 8 alkylmethacrylate, which may or may not contain polybutadiene.
Claim 25
Dependent Claim
48 words
The composition of claim 13, wherein the conjugated diene-based polymer is selected from the group consisting of polybutadiene, butadiene/styrene copolymers, butadiene-styrene block copolymers, styrene-isoprene block copolymers, butadiene/acrylonitrile copolymers obtained by copolymerizing or graft copolymerizing an unsaturated monomer having hydroxyl group, carboxyl group, acid anhydride group or amino group.
Claim 26
Dependent Claim
25 words
The composition of claim 1, wherein the elastomer has a melt flow rate of 0.1-100 g/10 minutes which is determined in accordance with ASTM D1238.
Claim 27
Dependent Claim
21 words
The composition of claim 1 further comprising 0.01-5 parts by weight of a hindered phenol derivative and/or a sulfur-containing ester compound.
Claim 28
Dependent Claim
38 words
The composition of claim 26, wherein the hindered phenol-based compound has a structural unit represented by the formula (II): ##STR13## (wherein R 1 means C 1 -C 10 alkyl) and has a molecular weight not less than 500.
Claim 29
Dependent Claim
61 words
The composition of claim 26, wherein the sulfur-containing ester compound is represented by formula (III) or (IV): S--R.sup.2 COOR.sup.3).sub.2 (III) (R.sup.5 SR.sup.4 COOCH.sub.2).sub.4 C (IV) (wherein R 2 and R 4 , the same or different, mean C 1 -C 10 alkyl group, and R 3 and R 4 , the same or different, mean C 3 -C 40 alkyl group)
Claim 30
Dependent Claim
22 words
The composition of claim 1 further comprising a filler in the amount of 50% by weight with respect to the whole composition.
Claim 31
Dependent Claim
46 words
The composition of claim 29, wherein the filler is selected from the group consisting of glass fibers, carbon fibers, metal fibers, aramide fibers, potassium titanate whiskers, glass flakes, glass beads, wallastenite, gypsum fibers, clay, mica, talc, sepiolite, titanium oxide, aluminum oxide, calcium carbonate and barium carbonate.
Claim 32
Dependent Claim
143 words
A process of producing a polyester composition comprising the steps of: blending in dry state (a) 100 parts by weight of an aromatic polyester; (b) 0.005-10 parts by weight of an epoxy compound of the formula (I): ##STR14## (wherein Ar means C 6 -C 20 aromatic group or C 6 -C 20 alicyclic group, n means an integer of 0-20); and (c) 1-70 parts by weight of at least one elastomer which has at least one functional group selected from the group consisting of epoxy groups, carboxyl group, carboxylate ester groups, carboxylic acid amide groups, acid anhydride group, imide groups, carboxylate salt groups, hydroxyl group, amino group and cyano group, the elastomer having a tensile modulus of 1-6,000 kg/cm 2 ; and thereafter melting and stirring the resulting mixture at temperature higher than the melting point of the aromatic polyester by 5°-50° C.
Claim 33
Dependent Claim
143 words
A process of producing a polyester composition comprising the steps of: blending in dry state (a) 100 parts by weight of an aromatic polyester; (b) 0.005-10 parts by weight of an epoxy compound of the formula (I): ##STR14## (wherein Ar means C 6 -C 20 aromatic group or C 6 -C 20 alicyclic group, n means an integer of 0-20); and (c) 1-70 parts by weight of at least one elastomer which has at least one functional group selected from the group consisting of epoxy groups, carboxyl group, carboxylate ester groups, carboxylic acid amide groups, acid anhydride group, imide groups, carboxylate salt groups, hydroxyl group, amino group and cyano group, the elastomer having a tensile modulus of 1-6,000 kg/cm 2 ; and thereafter melting and stirring the resulting mixture at temperature higher than the melting point of the aromatic polyester by 5°-50° C.
References Cited (Backward Citations)
US3222420A
Cited
US3560605A
Cited
GB1224684A
Cited
US4130549A
Cited
US4130601A
Cited
JPS53132034A
Cited
US4222928A
Cited
US4308195A
Cited
US4348500A
Cited
US4331782A
Cited
US4699942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |