EP0051471A1
Expired / Lapsed
EP
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Tough thermoplastic nylon compositions and processes for preparing them
Assignee: Monsanto Co
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Filing: 1981-10-30
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Granted: —
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Expires: 2001-10-30
Abstract
Abstract Tough multi-phase'thermoplastic compositions consisting essentially of 55 to 99 parts by weight of a polyamide matrix and 1 to 45 parts by weight of a multiphase polymer comprising 50 to 90 parts by weight of a crosslinked elastomer core and 10 to 50 parts by weight of a rigid polymer shell comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to 79 parts by weight of an interpolymerized C, to C 8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of an interpolymerized acrylonitrile. The toughened compositions are useful for making molded and extruded parts possessing impact resistance and ductility.
Inventors
- 👤 Massimo Baer
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 21:57
CPC Classifications
C; C08; C08L; C08L77/00
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
155 words
A multiphase thermoplastic composition consisting essentially of 55 to 99 parts by weight of a polyamide matrix resin of number average molecular weight in the range of about 5000 to 30,000 and 1 to 45 parts by weight of a multiphase core//shell polymer comprising about 50 to about 90 parts by weight of a crosslinked elastomer core and about 10 to about 50 parts by weight of a rigid thermoplastic polymer shell of glass transition temperature at least about 35°C comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of interpolymerized acrylonitrile or methacrylonitrile based on 100 parts by weight of shell polymer.
Claim 2
Dependent Claim
155 words
A multiphase thermoplastic composition consisting essentially of 55 to 99 parts by weight of a polyamide matrix resin of number average molecular weight in the range of about 5000 to 30,000 and 1 to 45 parts by weight of a multiphase core//shell polymer comprising about 50 to about 90 parts by weight of a crosslinked elastomer core and about 10 to about 50 parts by weight of a rigid thermoplastic polymer shell of glass transition temperature at least about 35°C comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of an interpolymerized C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 45 parts by weight of interpolymerized acrylonitrile or methacrylonitrile based on 100 parts by weight of shell polymer.
Claim 3
Dependent Claim
56 words
The composition according to claim 1 wherein the ratio of the apparent melt viscosity of the polyamide to the apparent melt viscosity of the multiphase core// shell polymer at 10C° above the melting point of the polyamide and at a shear rate of 1000 sec. -1 is in the range of about 0.1 to about 1.
Claim 4
Dependent Claim
40 words
The composition, according to Claim 1 or 2 wherein the multiphase core//shell polymer has a core of weight average particle diameter of at least about 0.3 micron and a rigid shell of average thickness of at least about 0.025 micron.
Claim 5
Dependent Claim
29 words
The composition according to Claim 3 wherein the multiphase core//shell polymer has a core of weight average particle diameter in the range of about 0.3 to about 0.8 micron.
Claim 6
Dependent Claim
14 words
The composition according to claim 3 wherein the crosslinked elastomer core comprises interpolymerized butadiene.
Claim 7
Dependent Claim
58 words
The composition according to Claim 5 wherein the carboxylic acid monomer is selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, mesaconic acid, citraconic acid, aconitic acid, fumaric acid and maleic acid, and monoesters of itaconic acid, mesaconic acid, citraconic acid, aconitic acid, maleic acid and fumaric acid and C 1 to C 6 alcohols.
Claim 8
Dependent Claim
27 words
The composition according to Claim 5 wherein the carboxylic acid monomer is selected from the group consisting of C 1 to C 4 monoalkyl maleates and fumarates.
Claim 9
Dependent Claim
17 words
The composition according to Claim 7 wherein the notched impact strength is at least about 300 J/m.
Claim 10
Dependent Claim
21 words
The composition according to Claim 3 wherein the polyamide is nylon 6, nylon 6,6 or a copolymer of nylon 6-nylon 6,6.
Claim 11
Dependent Claim
21 words
The composition according to Claim 7 wherein the polyamide is nylon 6, nylon 6,6 or a copolymer of nylon 6-nylon 6,6.
Claim 12
Dependent Claim
14 words
The composition according to Claim 9 wherein the crosslinked elastomer core comprises interpolymerized butadiene.
Claim 13
Dependent Claim
18 words
The composition according to Claim 3 containing up to 50 weight percent of fibrous or particulate mineral filler.
Claim 14
Dependent Claim
15 words
The composition according to Claim 3 containing up to 50 weight percent of glass fiber.
Claim 15
Dependent Claim
26 words
The compositions according to Claim 1 wherein the polyamide matrix resin has a number average molecular weight in the range of about 8,000 to about 20,000.
Claim 16
Dependent Claim
25 words
The composition of Claim 3 wherein the weight average particle diameter of the core is in the range of about 0.4 to about 0.7 micron.
Claim 17
Dependent Claim
31 words
The composition of Claim 1 consisting essentially of 65 to 90 parts by weight of the polyamide matrix resin and 10 to 35 parts by weight of the multiphase core//shell polymer.
Claim 18
Dependent Claim
31 words
The composition of Claim 3 consisting essentially of 65 to 90 parts by weight of the polyamide matrix resin and 10 to 35 parts by weight of the multiphase core//shell polymer.
Claim 19
Dependent Claim
31 words
The composition of Claim 7 consisting essentially of 65 to 90 parts by weight of the polyamide matrix resin and 10 to 35 parts by weight of the multiphase core//shell polymer.
Claim 20
Dependent Claim
11 words
A process of preparing a toughened multiphase thermoplastic composition which comprises:
Claim 21
Dependent Claim
11 words
A process of preparing a toughened multiphase thermoplastic composition which comprises:
Claim 22
Dependent Claim
24 words
preparing an aqueous emulsion of an elastomeric core polymer of weight average particle size in the range of about 0.3 to about 0.8 micron;
Claim 23
Dependent Claim
24 words
preparing an aqueous emulsion of an elastomeric core polymer of weight average particle size in the range of about 0.3 to about 0.8 micron;
Claim 24
Dependent Claim
126 words
graft polymerizing on the elastomeric core a rigid shell comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts. by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of a C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 4 5 parts by weight of interpolymerized acrylonitrile or methacrylonitrile per 100 parts by weight of rigid shell, wherein the rigid shell has a glass transition temperature of at least about 35°C and is of average thickness at least about 0.025 micron and wherein the weight ratio of core to shell is in the range of about 9:1 to about 1:1;
Claim 25
Dependent Claim
126 words
graft polymerizing on the elastomeric core a rigid shell comprising from about 1 to about 25 parts by weight of an interpolymerized ethylenically unsaturated carboxylic acid monomer, from about 20 to about 80 parts. by weight of interpolymerized styrene, from about 0 to about 79 parts by weight of a C 1 to C 8 alkyl acrylate or methacrylate and from about 0 to about 4 5 parts by weight of interpolymerized acrylonitrile or methacrylonitrile per 100 parts by weight of rigid shell, wherein the rigid shell has a glass transition temperature of at least about 35°C and is of average thickness at least about 0.025 micron and wherein the weight ratio of core to shell is in the range of about 9:1 to about 1:1;
Claim 26
Dependent Claim
10 words
recovering the multiphase core//shell polymer from the aqueous emulsion; and
Claim 27
Dependent Claim
10 words
recovering the multiphase core//shell polymer from the aqueous emulsion; and
Claim 28
Dependent Claim
24 words
melt blending the multiphase core// shell polymer with a polyamide of number average molecular weight in the range of about 5,000 to about 30,000.
Claim 29
Dependent Claim
24 words
melt blending the multiphase core// shell polymer with a polyamide of number average molecular weight in the range of about 5,000 to about 30,000.
Claim 30
Dependent Claim
23 words
The process of Claim 19 wherein the polyamide is of number average molecular weight in the range of about 8,000 to about 20,000.
Claim 31
Dependent Claim
55 words
The process of Claim 19 wherein the polyamide and the multiphase core//shell polymer are selected to provide a ratio of apparent melt viscosity in the range of about 0.1 to about 1 determined at 10°C above the melting point of the polyamide and at a shear rate of 1000 sec. 1. 1000 sec. -1 .
Claim 32
Dependent Claim
25 words
The process of Claim 21 wherein the weight average particle size of the core is in the range of about 0.4 to about 0.7 micron.
Claim 33
Dependent Claim
30 words
The process of Claim 19, 20, 21, or 22 wherein the carboxylic acid monomer is selected from the group consisting of C 1 to C 4 monoalkyl maleates and fumarates.
References Cited (Backward Citations)
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