WO1995002632B1 - Ethylene polymer foams blown with isobutane - Google Patents
Ethylene polymer foams blown with isobutaneInfo
- Publication number
- WO1995002632B1 WO1995002632B1 PCT/US1994/007478 US9407478W WO9502632B1 WO 1995002632 B1 WO1995002632 B1 WO 1995002632B1 US 9407478 W US9407478 W US 9407478W WO 9502632 B1 WO9502632 B1 WO 9502632B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blowing agent
- foam structure
- polymer material
- percent
- weight
- Prior art date
Links
- 239000006260 foam Substances 0.000 title claims abstract 10
- 229920000573 polyethylene Polymers 0.000 title claims abstract 4
- NNPPMTNAJDCUHE-UHFFFAOYSA-N Isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 title claims abstract 3
- 239000001282 iso-butane Substances 0.000 title claims abstract 3
- 239000004604 Blowing Agent Substances 0.000 claims abstract 18
- 238000000034 method Methods 0.000 claims abstract 13
- 239000002861 polymer material Substances 0.000 claims abstract 6
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-Tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims abstract 3
- UJPMYEOUBPIPHQ-UHFFFAOYSA-N 1,1,1-Trifluoroethane Chemical compound CC(F)(F)F UJPMYEOUBPIPHQ-UHFFFAOYSA-N 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims abstract 2
- 239000000155 melt Substances 0.000 claims 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000005187 foaming Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000000704 physical effect Effects 0.000 abstract 1
Abstract
Disclosed is an ethylene polymer foam structure having enhanced processing and physical properties. The foam structure comprises en ethylenic polymer material and a blowing agent. The blowing agent has a primary blowing agent of isobutane and a secondary blowing agent of 1,1,1-trifluoroethane, 1,1,1,2-tetrafluoroethane, or a blend of them. Further disclosed is a process for making the foam structure.
Claims
A
[received by the International Bureau on 13 January 1995 (13.01.95); original claims 4-11 amended; remaining claims unchanged (1 page)]
I . A process for making an ethylene polymer foam structure, comprising: a) heating an ethylene polymer material having greater than 50 percent by weight ethylenic monomeric units to form a melt polymer material; b) incorporating into the melt polymer material at an elevated pressure a blowing agent to form a foamable gel; and c) expanding the foamable gel at a lower pressure to form a foam structure, the process being characterized in that the blowing agent contains a primary blowing agent of isobutane and a secondary blowing agent selected from the group consisting of 1, 1,1- trif luoroethane, 1,1,1 ,
2-tetrafluoroethane, and a blend of the foregoi ng. 0 2- The process of Claim 1, wherein the foamable gel is cooled to a suitable foaming temperature, and expanded by extruding it through a die into a region of lower pressure to form the foam structure.
3. The process of Claim 1, wherein a stability control agent is incorporated into the melt polymer material. 15
4. The process of Claim 1, 2, or 3, wherein the blowing agent contains 5 to 95 weight percent of the primary blowing agent and 95 to 5 weight percent of the secondary blowing agent based upon the total weight of the blowing agent.
5. The process of Claim 1 , 2, or 3, wherein the blowing agent comprises 25 to 75 weight percent of the primary blowing agent and 75 to 25 weight percent of the secondary 0 blowing agent based upon the total weight of the blowing agent.
6. The process of Claim 1 , 2, or 3, wherein the secondary blowing agent is 1 , 1 , 1 - trif luoroethane.
7. The process of Claim 1 , 2, or 3, wherein the secondary blowing agent is 1 , 1 , 1 ,2- tetrafluoroethane.
25 8. The process of Claim 1 , 2, or 3, wherein the foam structure is 20 percent or less open-cell.
9. The process of Claim 1, 2, or 3, wherein the foam structure has an average cell size of 0.1 to 5.0 millimeters.
10. The process of Claim 1 , 2, or 3, wherein the foam structure has a density of 30 200 kilograms per cubic meter or less.
I I . The process of Claim 1, 2, or 3, wherein the ethylenic polymer material has greater than 70 percent or more by weight of ethylenic monomeric units.
35
23
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9084593A | 1993-07-12 | 1993-07-12 | |
| US08/090,845 | 1993-07-12 | ||
| US17780294A | 1994-01-06 | 1994-01-06 | |
| US08/177,802 | 1994-01-06 | ||
| US25215294A | 1994-06-01 | 1994-06-01 | |
| US08/252,152 | 1994-06-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1995002632A1 WO1995002632A1 (en) | 1995-01-26 |
| WO1995002632B1 true WO1995002632B1 (en) | 1995-02-23 |
Family
ID=27376675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/007478 WO1995002632A1 (en) | 1993-07-12 | 1994-07-01 | Ethylene polymer foams blown with isobutane |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5399592A (en) |
| WO (1) | WO1995002632A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5895614A (en) * | 1995-08-22 | 1999-04-20 | Tenneco Protective Packaging Inc. | Method of forming a microcellular foam plank |
| US6576174B1 (en) * | 2000-01-27 | 2003-06-10 | Industrial Thermo Polymers Limited | Residual gas extraction process |
| US6323245B1 (en) | 2000-08-24 | 2001-11-27 | Sealed Air Corporation (Us) | Blowing agent, polyolefin foam, and process for producing polyolefin foam |
| US7166248B2 (en) * | 2003-01-03 | 2007-01-23 | Pactiv Corporation | Reduced VOC emission alkenyl aromatic polymer foams and processes |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3668155A (en) * | 1968-06-27 | 1972-06-06 | Dow Chemical Co | Self-extinguishing ethylene copolymer foams comprising a ternary mixture of an antimony compound, a halogen-containing compound and a bromine compound |
| IT944979B (en) * | 1971-08-03 | 1973-04-20 | Dow Chemical Co | COMPOSITION CONTAINING A FIREPROOF COMPOUND FOR THE PROTECTIVE AND INSULATING COATING OF ELECTRIC CABLES |
| JPS58107317A (en) * | 1981-12-21 | 1983-06-27 | Shin Etsu Chem Co Ltd | Manufacture of foamable thermoplastic resin |
| US4663361A (en) * | 1985-12-24 | 1987-05-05 | The Dow Chemical Company | Expandable polyolefin compositions and preparation process utilizing isobutane blowing agent |
| WO1990001821A1 (en) * | 1988-08-05 | 1990-02-22 | Gerard Michael Criss | Cable reel |
| JP2932499B2 (en) * | 1989-05-18 | 1999-08-09 | 株式会社ジェイ エス ピー | Method for producing low density polyethylene resin foam |
| US5149473A (en) * | 1992-02-06 | 1992-09-22 | Amoco Corporation | Method for production of styrenic foam |
| US5210105A (en) * | 1992-06-09 | 1993-05-11 | The Dow Chemical Company | Carbon black-containing bimodal foam structures and process for making |
| US5244928A (en) * | 1992-08-07 | 1993-09-14 | The Dow Chemical Company | Foamable composition and process for making large cell size alkenyl aromatic polymer foam structure with 1,1-difluoroethane |
-
1994
- 1994-07-01 WO PCT/US1994/007478 patent/WO1995002632A1/en active Application Filing
- 1994-08-02 US US08/284,723 patent/US5399592A/en not_active Expired - Fee Related
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