EP0042153A2
Expired / Lapsed
EP
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Thermoformable polymer blend composition
Assignee: Solo Cup Operating Corp
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Filing: 1981-06-11
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Granted: —
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Expires: 2001-06-11
Abstract
Abstract A thermoformable polymer blend composition comprising at least 50% by weight of an olefin polymer such as polyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenic block copolymer rubber, preferably a styrene- butadiene-styrene block copolymer, which acts as a compatibilizer for the olefin and styrene polymers in the blend. This blend can be formed on conventional machinery to give products having the beneficial properties of both types of polymers.
Inventors
- 👤 Michael Rocco Grancio
- 👤 David Francis Stewart
- 👤 John Francis Cass
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:30
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L53/00; C08L53/02; C08L2205/00; C08L2205/03
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
55 words
A thermoformable polymer blend composition comprising at least 50% by weight of olcfin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a-compatibilizer for said olefin and said styrene polymers in said blend.
Claim 2
Dependent Claim
55 words
A thermoformable polymer blend composition comprising at least 50% by weight of olcfin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a-compatibilizer for said olefin and said styrene polymers in said blend.
Claim 3
Dependent Claim
24 words
A polymer blend composition according to claim 1, wherein the amount of olefin polymer in the blend is about 54 to 82% by weight.
Claim 4
Dependent Claim
24 words
A polymer blend composition according to claim 1, wherein the amount of styrene polymer in the blend is about 15 to 40% by weight.
Claim 5
Dependent Claim
25 words
A polymer blend composition according to claim 1, wherein the amount of styrenic block copolymer in the blend is about 2 to 10% by weight.
Claim 6
Dependent Claim
14 words
A polymer blend composition according to claim 1, wherein said olefin polymer is polypropylene.
Claim 7
Dependent Claim
14 words
A polymer blend composition according to claim 1, wherein said olefin polymer is polyethylene.
Claim 8
Dependent Claim
19 words
A polymer blend composition according to claim 1, wherein said styrene polymer is general purpose polystyrene or impact polystyrene.
Claim 9
Dependent Claim
16 words
A polymer blend composition according to claim 1, wherein said styrene polymer is an acrylonitrile-butadiene-styrene copolymer.
Claim 10
Dependent Claim
16 words
A polymer blend composition according to claim 1, wherein said styrene polymer is a styrene-acrylonitrile copolymer.
Claim 11
Dependent Claim
16 words
A polymer blend composition according to claim 1, wherein said compatibilizer is a styrene-butadiene block copolymer.
Claim 12
Dependent Claim
16 words
A polymer blend composition according to claim 1, wherein said compatibilizer is a styrene-ethylene block copolymer.
Claim 13
Dependent Claim
16 words
A polymer blend composition according to claim 1, wherein said compatibilizer is a styrene-isoprene block copolymer.
Claim 14
Dependent Claim
40 words
A thermoformable polymer blend composition comprising at least 50% by weight of polyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 15
Dependent Claim
40 words
A thermoformable polymer blend composition comprising at least 50% by weight of polyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 16
Dependent Claim
41 words
A thermoformable polymer blend composition comprising from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40% by weight of a styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 17
Dependent Claim
41 words
A thermoformable polymer blend composition comprising from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40% by weight of a styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 18
Dependent Claim
42 words
A thermoformable polymer blend composition comprising from 54 to 82% by weight of polypropylene, from 15 to 40% by weight of general purpose polystyrene or impact polystyrene and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styrene block copolymer rubber compatibilizer.
Claim 19
Dependent Claim
42 words
A thermoformable polymer blend composition comprising from 54 to 82% by weight of polypropylene, from 15 to 40% by weight of general purpose polystyrene or impact polystyrene and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styrene block copolymer rubber compatibilizer.
Claim 20
Dependent Claim
106 words
A process of molding articles having a desired shape which comprises feeding a thermoplastic sheet formed from a polymer blend comprising at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a compatibilizer [or said olefin and said styrene polymers in said blend to a heating station where it is heated to its softening point, advancing the heated sheet to a forming station having molds of said desired shape, and molding the sheet within said forming station.
Claim 21
Dependent Claim
106 words
A process of molding articles having a desired shape which comprises feeding a thermoplastic sheet formed from a polymer blend comprising at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a compatibilizer [or said olefin and said styrene polymers in said blend to a heating station where it is heated to its softening point, advancing the heated sheet to a forming station having molds of said desired shape, and molding the sheet within said forming station.
Claim 22
Dependent Claim
18 words
The process of claim 16, wherein the thermoplastic sheet is fed from a roll of said sheet material.
Claim 23
Dependent Claim
14 words
The process of claim 16, wherein the thermoplastic sheet is continuously formed by extrusion.
Claim 24
Dependent Claim
44 words
The process of claim 16, wherein said polymer blend comprises at least 50% by weight of polyethylene or polypropylene from 10 to 48% by seight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatihilizer.
Claim 25
Dependent Claim
46 words
The process of claim 16, wherein said polymer blend comprises from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40 % by weight of a styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styrene block copolymer rubber compatibilizer.
Claim 26
Dependent Claim
16 words
The process of claim 20, wherein said styrene polymer is general purpose polystyrene or impact polystyrene.
Claim 27
Dependent Claim
68 words
A process of molding articles having a desired shape which comprises injection molding a polymer blend comprising at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40 by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a compatibilizer for said olefin and said styrene polymers in said blend.
Claim 28
Dependent Claim
68 words
A process of molding articles having a desired shape which comprises injection molding a polymer blend comprising at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40 by weight of a thermoplastic styrenic block copolymer rubber which is capable of functioning as a compatibilizer for said olefin and said styrene polymers in said blend.
Claim 29
Dependent Claim
44 words
The process of claim 22, wherein said polymer blend comprises at least 50% by weight of polyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 30
Dependent Claim
45 words
The process of claim 22, wherein said polymer blend comprises from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40% by weight of a styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styrene block copolymer rubber compatibilizer.
Claim 31
Dependent Claim
90 words
A process of molding articles having a desired shape which comprises feeding a thermoplastic sheet formed from a polymer blend comprising at least 50% by weight of an olcfin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenie block copolymer rubber which is capable of funetioning as a compatibilizer for said olefin and said styrene polymers in said blend to a forming station having molds of said desired shape, and molding the sheet within said forming station.
Claim 32
Dependent Claim
90 words
A process of molding articles having a desired shape which comprises feeding a thermoplastic sheet formed from a polymer blend comprising at least 50% by weight of an olcfin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic styrenie block copolymer rubber which is capable of funetioning as a compatibilizer for said olefin and said styrene polymers in said blend to a forming station having molds of said desired shape, and molding the sheet within said forming station.
Claim 33
Dependent Claim
44 words
The process of claim 25, wherein said polymer blend comprises at least 50% by weight of pulyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizcr.
Claim 34
Dependent Claim
45 words
The process of claim 25, wherein said polymer blend comprises from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40% by weight of a styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styrene block copolymer rubber compatibilizer.
Claim 35
Dependent Claim
9 words
Molded articles produced by the process of claim 16.
Claim 36
Dependent Claim
9 words
Molded articles produced by the process of claim 19.
Claim 37
Dependent Claim
9 words
Molded articles produced by the process of claim 22.
Claim 38
Dependent Claim
9 words
Molded articles produced by the process of claim 23.
Claim 39
Dependent Claim
9 words
Molded articles produced by the process of claim 25.
Claim 40
Dependent Claim
9 words
Molded articles produced by the process of claim 26.
Claim 41
Dependent Claim
69 words
A process of producing a thermoformabie polymer sheet which comprises mixing at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic slyrenic block copolymer rubber which is capable of functioning as a compatibilizer for said olcfin and said styrene polymers in said blend and forming a sheet therefrom by extrusion.
Claim 42
Dependent Claim
69 words
A process of producing a thermoformabie polymer sheet which comprises mixing at least 50% by weight of an olefin polymer, from 10 to 48% by weight of a styrene polymer and from 2 to 40% by weight of a thermoplastic slyrenic block copolymer rubber which is capable of functioning as a compatibilizer for said olcfin and said styrene polymers in said blend and forming a sheet therefrom by extrusion.
Claim 43
Dependent Claim
43 words
The process of claim 34, wherein the mixture comprises at least 50% by weight of polyethylene or polypropylene, from 10 to 48% by weight of a styrene polymer and from 2 to 20% by weight of a thermoplastic styrene-butadiene block copolymer rubber compatibilizer.
Claim 44
Dependent Claim
43 words
The process of claim 34, wherein the mixture comprises from 54 to 82% by weight of polyethylene or polypropylene, from 15 to 40% by weight of styrene polymer and from 2 to 10% by weight of a thermoplastic styrene-butadiene-styene block copolymcr rubber compatibilizer
Claim 45
Dependent Claim
16 words
The process of claim 36, wherein said styrene polymer is general purpose polystyrene or impact polystyrene.
Claim 46
Dependent Claim
11 words
A thermoformabie polymer sheet produced by the process of claim 34.
Claim 47
Dependent Claim
11 words
A thermoformabie polymer sheet produced by the process of claim 35.
References Cited (Backward Citations)
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