WO1997022656B1 - Thermoplastic foam and process for producing it using carbon dioxide - Google Patents
Thermoplastic foam and process for producing it using carbon dioxideInfo
- Publication number
- WO1997022656B1 WO1997022656B1 PCT/IB1996/001478 IB9601478W WO9722656B1 WO 1997022656 B1 WO1997022656 B1 WO 1997022656B1 IB 9601478 W IB9601478 W IB 9601478W WO 9722656 B1 WO9722656 B1 WO 9722656B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymer melt
- thermoplastic foam
- copolymer
- blowing agent
- thermoplastic
- Prior art date
Links
- 239000006260 foam Substances 0.000 title claims abstract 27
- 229920001169 thermoplastic Polymers 0.000 title claims abstract 27
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract 23
- 238000000034 method Methods 0.000 title claims abstract 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract 9
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract 9
- 239000001569 carbon dioxide Substances 0.000 title claims abstract 9
- 229920000642 polymer Polymers 0.000 claims abstract 22
- -1 polysiloxane Polymers 0.000 claims abstract 21
- 239000004604 Blowing Agent Substances 0.000 claims abstract 12
- 229920001296 polysiloxane Polymers 0.000 claims abstract 10
- 229920000098 polyolefin Polymers 0.000 claims abstract 6
- 239000002480 mineral oil Substances 0.000 claims abstract 5
- 235000010446 mineral oil Nutrition 0.000 claims abstract 5
- 238000005187 foaming Methods 0.000 claims abstract 3
- 238000002844 melting Methods 0.000 claims abstract 2
- 229920001577 copolymer Polymers 0.000 claims 14
- 239000000463 material Substances 0.000 claims 6
- 239000000203 mixture Substances 0.000 claims 6
- 239000011159 matrix material Substances 0.000 claims 4
- 229920001155 polypropylene Polymers 0.000 claims 4
- JTXMVXSTHSMVQF-UHFFFAOYSA-N 2-acetyloxyethyl acetate Chemical compound CC(=O)OCCOC(C)=O JTXMVXSTHSMVQF-UHFFFAOYSA-N 0.000 claims 3
- 239000005977 Ethylene Substances 0.000 claims 3
- 239000004743 Polypropylene Substances 0.000 claims 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 3
- 239000004711 α-olefin Substances 0.000 claims 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims 2
- 239000004952 Polyamide Substances 0.000 claims 2
- 239000004698 Polyethylene (PE) Substances 0.000 claims 2
- 239000004793 Polystyrene Substances 0.000 claims 2
- 239000004205 dimethyl polysiloxane Substances 0.000 claims 2
- 229920001038 ethylene copolymer Polymers 0.000 claims 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims 2
- 150000002894 organic compounds Chemical class 0.000 claims 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims 2
- 229920002647 polyamide Polymers 0.000 claims 2
- 239000011528 polyamide (building material) Substances 0.000 claims 2
- 229920000573 polyethylene Polymers 0.000 claims 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims 2
- 229920002223 polystyrene Polymers 0.000 claims 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract 4
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000004806 packaging method and process Methods 0.000 abstract 1
Abstract
The present invention provides a process for producing thermoplastic foam, including: (a) melting a thermoplastic polymer to produce a polymer melt; (b) introducing a carbon dioxide blowing agent into the polymer melt; (c) adding to the polymer melt one or more additives selected from the group consisting of (1) polysiloxane, and (2) mineral oil; and (d) extruding and foaming the melted polymer melt, blowing agent, and one or more additives to produce thermoplastic foam. The resultant thermoplastic foam can be thermoformed into various foamed articles, such as foam packaging trays. The quality of foams made from a carbon dioxide blowing agent, and particularly 100 % carbon dioxide, has been found to be substantially improved by adding one or more of the foregoing additives, i.e., polysiloxane, mineral oil and, optionally, polyolefin to the polymer melt during the extrusion and foaming process. Such foams have far less ruptured cells, surface cracks and corrugation than comparable foams made with a carbon dioxide blowing agent but which lack the additives of the present invention.
Claims
AMENDED CLAIMS
[receded by the International Bureau on 1 July 1997 (01 07 97), original claims 1 9, 10, 14 15 18 and 24 amended, remaining claims unchanged (4 pages)]
1 A process for producing thermoplastic foam, comprising
(a) melting a thermoplastic polymer to produce a polymer melt. (b) introducing a blowing agent comprising carbon dioxide into said polymer melt.
(c) adding polysiloxane to said polymer melt, and
(d) extruding and foaming said polymer melt, blowing agent, and polysiloxane to produce thermoplastic foam
2 The process of claim 1. wherein said blowing agent consists essentially of carbon dioxide
3 The process of claim 1. further including the step of thermoform g said thermoplastic foam into a foamed article
4 The process of claim 1. wherein the thermoplastic foam contains a plurality of cells having a size which ranges from about 0 25 to about 0 45 millimeters
5 The process of claim 1. wherein said blowing agent is present in said polymer melt in an amount ranging from about 0 1 to about 15 weight percent, based on the weight of said polymer melt
6 The process of claim 1. wherein said thermoplastic polvmer is selected from the group consisting of polystyrene, polyprop lene, and polyethylene terephthalate
7 The process of claim 1. wherein said polysiloxane is a polydimethylsiloxane modified with an organic compound
8 The process of claim 1. wherein said polysiloxane is present in said polymer melt in an amount of no greater than about 1 0 eight percent, based on the eight of said polymer melt
9 The process of claim I . further including the addition of mineral oil to said polymer melt
10 The process of claim 9. wherein said mineral oil is present in said polymer melt in an amount ranging from about 0 03 to about 0 5 weight percent, based on the weight of said polymer melt
1 1 The process of claim 1. further including the addition of polyolefin to said polymer melt
12 The process of claim 1 1. wherein said polyolefin is selected from the group consisting of ethylenc/alpha-olefm copolymer. polypropylene. prop\ lene/ethylene copohmer. ethylene/vinyl acetate copolymer. and cthylene/vmyl alcohol copolymer
13 The process of claim I 1. herein said polyolefin is present in said polymer melt in an amount ranging from about I to about 15 weight percent, based on the weight of said polymer melt
14 T e process of claim 1. wherein said polysiloxane is added to said polymer melt prior to introducing said blowing agent to said polymer melt
15 The process of claim 1. wherein said polysiloxane is added to said pol mer melt concurrently with the introduction of said blowing agent to said polymer melt
16 The process of claim 1. further including the step of adhering an oxygen-barπer film to said thermoplastic foam
17 The process of claim 1 . wherein said oxygen-barπcr film comprises
(a) a bonding layer comprising a material selected from the group consisting of stvrene/butadiene copolymer. ethylene/vin l acetate copolymer. and blends of the foregoing mateπals. (b) an oxygen-barrier layer compπsing a material selected from the group consisting of ethylene/v yl alcohol copolymer. vinvlidene chloride and copolymers thereof, acrylonitrile. polyamide. and blends of the foregoing mateπals. and
(c) an outer layer comprising a material selected from the group consisting of polyethylene, polypropylene, propylcne/ethvlene copolymer. ethvlene/alpha-olefin copohmer. and blends of the foregoing materials
18 A thermoplastic foam, compπsing
(a) a polymeric matrix compπsing a thermoplastic polymer and polysiloxane. and (b) a plurality of cells dispersed throughout said polymeric matrix and containing a blowing agent comprising carbon dioxide
1 The theπnoplastic foam of claim 18. wherein said blowing agent consists essentially of carbon dioxide
20 The thermoplastic foam of claim 18. wherein said thermoplastic foam is a thermoformed article
21 The thermoplastic foam of claim 18. wherein said thermoplastic foam contains a plurality of cells having a size which ranges from about 0 25 to about 0 45 millimeters
22 The thermoplastic foam of claim 1 . wherein said thermoplastic polymer is selected from the group consisting of polystyrene, polypropylene, and polyethylene terephthalate
23 T e thermoplastic foam of claim 18. wherein said polysiloxane is a polydimethylsiloxane modified with an organic compound
24 The thermoplastic foam of claim 18. where said polymeric matrix further includes mineral oil
25 The thermoplastic foam of claim 18. where said polymeπc matrix further includes polyolefin
26 The thermoplastic foam of claim 25. wherein said polyolefin is selected from the group consisting of ethvlene/alpha-olefin copolymer. polypropylene, propylene/ethylene copolymer. ethylene/vinyl acetate copolymer. and ethylene/vinyl alcohol copolymer
27 The thermoplastic foam of claim 18. further including an oxygen-barrier film which is adhered to said thermoplastic foam
28 The thermoplastic foam of claim 26. wherein said oxygen-bamer film compπses
(a) a bonding layer comprising a mateπal selected from the group consisting of stvrene/butadiene copolymer. ethylene/vinyl acetate copolymer. and blends of the foregoing materials.
(b) an oxygen-barrier layer comprising a mateπal selected from the group consisting of ethylene/vinyl alcohol copolymer. vinylidene chlonde and copolymers thereof, acr lonitπle. polyamide. and blends of the foregoing mateπals. and
(c) an outer layer compπsing a mateπal selected from the group consisting of polyethylene, polypropylene, propylene/ethylene copolymer. ethvlene/alpha-olefin copolymer. and blends of the foregoing materials
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP96942545A EP0868472B1 (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
| BR9612060-6A BR9612060A (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
| AT96942545T ATE207507T1 (en) | 1995-12-18 | 1996-12-18 | THERMOPLASTIC FOAM AND PRODUCTION PROCESS THEREOF USING CARBON DIOXIDE |
| DE69616377T DE69616377T2 (en) | 1995-12-18 | 1996-12-18 | THERMOPLASTIC FOAM AND PRODUCTION METHOD THEREFORE WITH CARBON DIOXIDE |
| AU11679/97A AU709247B2 (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
| CA002240774A CA2240774C (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
| NZ324417A NZ324417A (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/573,812 US5670552A (en) | 1995-12-18 | 1995-12-18 | Foam and process for producing foam using a carbon dioxide blowing agent |
| US08/573,812 | 1995-12-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997022656A1 WO1997022656A1 (en) | 1997-06-26 |
| WO1997022656B1 true WO1997022656B1 (en) | 1997-08-14 |
Family
ID=24293488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB1996/001478 WO1997022656A1 (en) | 1995-12-18 | 1996-12-18 | Thermoplastic foam and process for producing it using carbon dioxide |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US5670552A (en) |
| EP (1) | EP0868472B1 (en) |
| CN (1) | CN1080281C (en) |
| AT (1) | ATE207507T1 (en) |
| AU (1) | AU709247B2 (en) |
| BR (1) | BR9612060A (en) |
| CA (1) | CA2240774C (en) |
| DE (1) | DE69616377T2 (en) |
| ES (1) | ES2164267T3 (en) |
| NZ (1) | NZ324417A (en) |
| WO (1) | WO1997022656A1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5962545A (en) * | 1997-06-23 | 1999-10-05 | The Dow Chemical Company | Method of enhancing open cell formation in alkenyl aromatic polymer foams |
| US6428297B1 (en) * | 1998-10-28 | 2002-08-06 | Dart Container Corporation | Apparatus for making a corrugation-free foam |
| US6288144B1 (en) | 1999-04-20 | 2001-09-11 | Uniroyal Chemical Company, Inc. | Processing of coupled, filled polyolefins |
| DE19921386A1 (en) * | 1999-05-10 | 2000-11-16 | Basf Ag | Open cell particle foams |
| US6403663B1 (en) | 1999-09-20 | 2002-06-11 | North Carolina State University | Method of making foamed materials using surfactants and carbon dioxide |
| US6764756B1 (en) * | 1999-12-23 | 2004-07-20 | Sealed Air Corporation (Us) | Polyolefin foam composite structure and method for making the same |
| US6773798B2 (en) * | 1999-12-23 | 2004-08-10 | Sealed Air Corporation (Us) | Polyolefin foam composite structure and method for making the same |
| JP2004512406A (en) | 2000-10-24 | 2004-04-22 | ダウ グローバル テクノロジーズ インコーポレイティド | Method of preparing water-free multimodal thermoplastic polymer foams and foams prepared therefrom |
| DK1345986T3 (en) * | 2000-12-21 | 2009-01-12 | Dow Global Technologies Inc | Blowing agent composition and polymer foam containing a normally liquid hydrofluorocarbon and carbon dioxide |
| US7658989B2 (en) * | 2001-03-28 | 2010-02-09 | North Carolina State University | Nano-and micro-cellular foamed thin-walled material, and processes and apparatuses for making the same |
| CA2435144C (en) * | 2003-07-15 | 2010-06-15 | Beaver Plastics Ltd. | Top dressing for seedling containers |
| US20060160928A1 (en) * | 2005-01-18 | 2006-07-20 | Cleveland Christopher S | Thermoformed polystyrene products |
| US8314161B2 (en) | 2005-08-22 | 2012-11-20 | Owens Corning Intellectual Capital, Llc | Deformable, rigid polystyrene foam board |
| DE102006014235A1 (en) * | 2006-03-28 | 2007-10-04 | Brugg Rohr Ag, Holding | Sheath for heat-insulated pipes |
| ITBO20070391A1 (en) * | 2007-06-01 | 2008-12-02 | Coopbox Europ Spa | PLASTIC MATERIAL LEAF, TRAY FOR A FOOD PRODUCT OBTAINED FROM THE LEAF, PACKAGE INCLUDING THE TRAY AND ITS APPLICATION METHOD. |
| CA2828727A1 (en) * | 2011-03-02 | 2012-09-07 | Mark Allen Nunley | Methods for integrated natural gas purification and products produced therefrom |
| CN102924742B (en) * | 2011-08-12 | 2015-09-30 | 黑龙江鑫达企业集团有限公司 | Supercritical CO 2 legal system is for the method for expandable polypropylene resin particle |
| CN102504498B (en) * | 2011-10-10 | 2013-06-26 | 北京工商大学 | Foaming PET (Polyethylene Terephthalate) sheet and preparation method thereof |
| WO2014018768A1 (en) * | 2012-07-27 | 2014-01-30 | Reedy International Corporation | Additives for low loss wire and cable dielectrics |
| WO2016023218A1 (en) | 2014-08-15 | 2016-02-18 | Dow Global Technologies Llc | Polydimethylsiloxane grafted polyethylene foam |
| KR20180089467A (en) * | 2015-12-03 | 2018-08-08 | 다우 글로벌 테크놀로지스 엘엘씨 | High Porous Microporous Polyethylene |
| US11414529B2 (en) * | 2018-06-21 | 2022-08-16 | Fina Technology, Inc. | Polystyrene compositions for foam extrusion |
| EP3663339B1 (en) * | 2018-12-03 | 2024-05-15 | Trinseo Europe GmbH | Foams and method of forming foams of ionomers of copolymers of vinylidene aromatic monomer and unsaturated compounds with acid groups |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4344710A (en) * | 1980-06-10 | 1982-08-17 | Mobil Oil Corporation | Polymer foam extrusion system |
| US4424287A (en) * | 1980-06-10 | 1984-01-03 | Mobil Oil Corporation | Polymer foam process |
| US4596832A (en) * | 1980-07-28 | 1986-06-24 | Dainippon Ink And Chemicals, Inc. | Process for producing thermoplastic resin foam |
| US4452751A (en) * | 1982-02-26 | 1984-06-05 | The Dow Chemical Company | Styrena polymer foam made with α-polyolefin additives |
| US4454086A (en) * | 1982-06-18 | 1984-06-12 | The Dow Chemical Company | Making cross-linked styrene polymer foam |
| US4529740A (en) * | 1984-02-06 | 1985-07-16 | W. R. Grace & Co. | Foamable hot melt polymer compositions |
| US4728674A (en) * | 1986-11-03 | 1988-03-01 | General Electric Company | Modified polyphenylene ether resins having improved foamability and methods of making the same |
| US4847148A (en) * | 1987-10-30 | 1989-07-11 | W. R. Grace & Co. | Thermoformable barrier sheet |
| US4935089A (en) * | 1987-10-30 | 1990-06-19 | W. R. Grace & Co.-Conn. | Method of making a thermoformable barrier sheet |
| US5286429A (en) * | 1988-06-27 | 1994-02-15 | Mobil Oil Corporation | High melt index polystyrene foam and method |
| JPH02240145A (en) * | 1989-03-14 | 1990-09-25 | Sekisui Plastics Co Ltd | Preparation of polyolefin resin foam |
| US5250577A (en) * | 1989-08-02 | 1993-10-05 | The Dow Chemical Company | Polystyrene foam made with only carbon dioxide as a blowing agent and a process for making the same |
| US5128196A (en) * | 1990-03-16 | 1992-07-07 | Amoco Corporation | Foamed core-reclaim multi-layer sheet and process for production thereof |
| US5118561A (en) * | 1990-10-01 | 1992-06-02 | W. R. Grace & Co.-Conn. | Recycling of barrier polystyrene foam scrap and barrier polystyrene foam containing recycled barrier polystyrene foam scrap |
| CA2083004A1 (en) * | 1992-05-13 | 1993-11-14 | Thomas Hessen | Barrier polyprepylene foam trays |
| US5218006A (en) * | 1992-06-01 | 1993-06-08 | Reedy Michael E | Process for producing polystyrene foam |
| US5288740A (en) * | 1992-10-23 | 1994-02-22 | The Dow Chemical Company | Process for making alkenyl aromatic foam packing bodies with carbon dioxide and/or ethane blowing agent systems |
| US5269987A (en) * | 1992-12-22 | 1993-12-14 | Reedy Michael E | Process for producing alkenyl aromatic foams using a combination of atmospheric and organic gases and foams produced thereby |
| US5422378A (en) * | 1993-06-04 | 1995-06-06 | The Dow Chemical Company | Foamable styrenic polymer gel and resulting foam |
-
1995
- 1995-12-18 US US08/573,812 patent/US5670552A/en not_active Expired - Lifetime
-
1996
- 1996-12-18 EP EP96942545A patent/EP0868472B1/en not_active Expired - Lifetime
- 1996-12-18 NZ NZ324417A patent/NZ324417A/en not_active IP Right Cessation
- 1996-12-18 AU AU11679/97A patent/AU709247B2/en not_active Ceased
- 1996-12-18 WO PCT/IB1996/001478 patent/WO1997022656A1/en active IP Right Grant
- 1996-12-18 BR BR9612060-6A patent/BR9612060A/en not_active IP Right Cessation
- 1996-12-18 AT AT96942545T patent/ATE207507T1/en not_active IP Right Cessation
- 1996-12-18 ES ES96942545T patent/ES2164267T3/en not_active Expired - Lifetime
- 1996-12-18 CA CA002240774A patent/CA2240774C/en not_active Expired - Fee Related
- 1996-12-18 CN CN96180047A patent/CN1080281C/en not_active Expired - Fee Related
- 1996-12-18 DE DE69616377T patent/DE69616377T2/en not_active Expired - Lifetime
-
1997
- 1997-11-12 US US08/968,672 patent/US5994420A/en not_active Expired - Fee Related
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