Patent US913307A successfully refreshed from Google Patents.
EP0306774A2
Expired / Lapsed
EP
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Olefinic impact modifiers for compatible blends of polyphenylene ethers and linear polyester resins
Assignee: General Electric Co
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Filing: 1988-08-24
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Granted: —
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Expires: 2008-08-24
Abstract
Abstract Thermoplastic compositions comprising polyphenylene ethers and polyesters, impact-modified by glycidyl (meth)acrylate grafted EPDM and compatibilized by an aromatic polycarbonate exhibit high impact strength alone and when combined with other impact modifiers. Their shear sensitive viscosity properties makes them uniquely suitable for extrusion and blow molding applications.
Inventors
- 👤 John Bennie Yates Iii
- 👤 Charles Franklyn Pratt
- 👤 Angelika Howard Mchale
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 18:09
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L69/00; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/126; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
131 words
An impact modified thermoplastic composition comprising the following various components and any reaction products thereof: (a) a compatible resin composition comprising (i) at least one polyphenylene ether resin, alone, or in combination with a polystyrene resin: (ii) at least one poly(alkylene dicarboxylate) resin, the weight ratio component of (i) to component (ii) being at most 1.5:1; and (iii) at least one polymer containing a substantial proportion of aromatic polycarbonate units, alone, or in combination with a styrene homopolymer; and (b) an effective amount of an impact modifier comprising an EPDM terpolymer grafted with glycidyl methacrylate or glycidyl acrylate or a mixture thereof, alone, or grafted in further combination with a Ci-Cis alkyl methacrylate or acrylate or a mixture thereof, alone, or in combination with at least one additional compatible impact modifier.
Claim 2
Dependent Claim
131 words
An impact modified thermoplastic composition comprising the following various components and any reaction products thereof: (a) a compatible resin composition comprising (i) at least one polyphenylene ether resin, alone, or in combination with a polystyrene resin: (ii) at least one poly(alkylene dicarboxylate) resin, the weight ratio component of (i) to component (ii) being at most 1.5:1; and (iii) at least one polymer containing a substantial proportion of aromatic polycarbonate units, alone, or in combination with a styrene homopolymer; and (b) an effective amount of an impact modifier comprising an EPDM terpolymer grafted with glycidyl methacrylate or glycidyl acrylate or a mixture thereof, alone, or grafted in further combination with a Ci-Cis alkyl methacrylate or acrylate or a mixture thereof, alone, or in combination with at least one additional compatible impact modifier.
Claim 3
Dependent Claim
74 words
A composition as defined in Claim 1 wherein component (a)(i) comprises from about 15 to about 45 percent by weight; component (a)(ii) comprises from about 15 to about 45 percent by weight component (a)(iii) comprises from about 3 to about 50 percent by weight; and component (b) comprises from about 8 to about 25 percent by weight, all percentage proportions being based on the weight of the total various resinous components in the composition.
Claim 4
Dependent Claim
17 words
A composition as defined in Claim 1 wherein component (a)(i) comprises a polyphenylene ether and a polystyrene.
Claim 5
Dependent Claim
14 words
A composition as defined in Claim 1 wherein said polyphenylene ether comprises poly(2,6-dimethyl-1,4-phenylene ether).
Claim 6
Dependent Claim
13 words
A composition as defined in Claim 3 wherein the polystyrene comprises a homopolymer.
Claim 7
Dependent Claim
14 words
A composition as defined in Claim 3 wherein the polystyrene comprises a rubber-modified polystyrene.
Claim 8
Dependent Claim
14 words
A composition as defined in Claim 3 wherein the polyphenylene ether comprises poly(2,6-dimethyl-1,4-phenylene ether).
Claim 9
Dependent Claim
28 words
A composition as defined in Claim 1 wherein component (a)(ii) comprises poly(ethylene terephthalate) or poly(butylene terephthalate) or a mixture thereof and component (a)(iii) comprises bisphenol A polycarbonate units.
Claim 10
Dependent Claim
13 words
A composition as defined in Claim 8 wherein component (a)(ii) comprises poly(1,4-butylene terephthalate).
Claim 11
Dependent Claim
17 words
A composition as defined in Claim 9 wherein component (a)(ii) contains an agent which suppresses ester-carbonate exchange.
Claim 12
Dependent Claim
16 words
A composition as defined in Claim 10 wherein the exchange suppressing agent comprises sodium dihydrogen phosphate.
Claim 13
Dependent Claim
13 words
A composition according to Claim 1 wherein component (a)(iii) comprises a polycarbonate homopolymer.
Claim 14
Dependent Claim
13 words
A composition as defined in Claim 1 wherein component (a)(iii) comprises a polyester-polycarbonate.
Claim 15
Dependent Claim
16 words
A composition as defined in Claim 1 wherein component (a)(iii) comprises a poly(2,6-dimethyl-1,4-phenylene ether)-polycarbonate block copolymer.
Claim 16
Dependent Claim
40 words
A composition as defined in Claim 9 wherein polyphenylene ether component (a)(i) contains no more than 800 ppm of unneutralized amino nitrogen and has an intrinsic viscosity of at least about 0.25 dl/g as measured in chloroform at 25 C.
Claim 17
Dependent Claim
44 words
A composition as defined in Claim 15 wherein component (a)(i) comprises a polyphenylene ether which has been inactivated by at least one of precompounding with at least one non-volatile compound containing a carboxylic acid, acid anhydride or ester group and extrusion with vacuum venting.
Claim 18
Dependent Claim
33 words
A composition as defined in Claim 1 wherein the grafted EPDM terpolymer is derived from approximately 45 to 70 mole percent ethylene, approximately 30-55 mole percent propylene and a minor amount of 5-ethylidene-2-norbornene.
Claim 19
Dependent Claim
36 words
A composition as defined in Claim 2 wherein the EPDM-glycidyl ester grafted terpolymer is present in an amount of, approximately, 10 to 20 percent by weight based on the total weight of resins in the composition.
Claim 20
Dependent Claim
32 words
A composition as defined in Claim 1 wherein in component (b) the EPDM terepolymer is grafted ' with 2% more by weight based on said terpolymer of glycidyl methacrylate or glycidyl acrylate.
Claim 21
Dependent Claim
16 words
A composition as defined in Claim 1 wherein component (b) also comprises an additional impact modifier.
Claim 22
Dependent Claim
36 words
A composition as defined in Claim 20 wherein said additional modifier is a triblock copolymer wherein the end blocks are derived from styrene and the midblock is derived from at least one of isoprene and butadiene.
Claim 23
Dependent Claim
20 words
A composition as defined in Claim 21 wherein the aliphatic unsaturation in the midblock has been removed by selective hydrogenation.
Claim 24
Dependent Claim
134 words
A process for producing an impact modified thermoplastic molding composition comprising blending (a) a compatible resin composition comprising (i) at least one polyphenylene ether resin, alone, or in combination with a polystyrene resin: (ii) at least one poly(alkylene dicarboxylate) resin, the weight ratio component of (i) to component (ii) being at most 1.5:1; and (iii) at least one polymer containing a substantial proportion of aromatic polycarbonate units, alone, or in combination with a styrene homopolymer; and an effective amount for enhanced impact strength of an impact modifier comprising an EPDM terpolymer grafted with glycidyl methacrylate or glycidyl acrylate or a mixture thereof, alone, or grafted in further combination with a C 1 -C 18 alkyl methacrylate or acrylate or a mixture thereof, alone or in combination with at least one additional compatible impact modifier.
Claim 25
Dependent Claim
134 words
A process for producing an impact modified thermoplastic molding composition comprising blending (a) a compatible resin composition comprising (i) at least one polyphenylene ether resin, alone, or in combination with a polystyrene resin: (ii) at least one poly(alkylene dicarboxylate) resin, the weight ratio component of (i) to component (ii) being at most 1.5:1; and (iii) at least one polymer containing a substantial proportion of aromatic polycarbonate units, alone, or in combination with a styrene homopolymer; and an effective amount for enhanced impact strength of an impact modifier comprising an EPDM terpolymer grafted with glycidyl methacrylate or glycidyl acrylate or a mixture thereof, alone, or grafted in further combination with a C 1 -C 18 alkyl methacrylate or acrylate or a mixture thereof, alone or in combination with at least one additional compatible impact modifier.
Claim 26
Dependent Claim
32 words
A process as defined in Claim 23 compound (a)(i) comprises poly(2,6-dimethyl-1,4-phenylene ether), component (a)(ii) is selected poly(ethylene terephthalate), poly(1,4-butylene terephthalate), or a mixture thereof, and component (a)(ii) comprises a poly (bisphenol-A carbonate).
Claim 27
Dependent Claim
14 words
The process of Claim 24 wherein the high-molecular weight thermoplastic polyester is poly(1,4-butylene terephthalate).
Claim 28
Dependent Claim
19 words
An article of manufacture comprising a container blow-molded from an impact modified thermoplastic composition as defined in Claim 1.
References Cited (Backward Citations)
No citation records indexed.
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