US5397807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatibilized carbon black and a process and a method for using
Assignee: Dow Chemical Co
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Filing: 1994-05-27
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Granted: 1995-03-14
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Expires: 2014-05-27
Abstract
Abstract Disclosed is a compatibilized carbon black useful in melt processing of plastic material. The carbon black is coated with a compatibilizing agent which enhances the dispersibility of the carbon black in a melt of the plastic material. Further disclosed are processes for making plastic foam structures with the compatibilized carbon black.
Inventors
- 👤 Martin K. Hitchcock
- 👤 Kyung W. Suh
- 👤 Arnold M. Bartz
- 👤 Andrew N. Paquet
- 👤 William G. Stobby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:07
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; B; B05; B05D; B05D3/00; B05D3/02; B32; B32B; B32B3/00; B32B3/26; B82; B82Y; B82Y30/00; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C3/00; C09C3/08; C09C3/10; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
114 words
A process for making a plastic polymer foam structure, comprising: a) heating a plastic polymer material to form a melt polymer material; b) incorporating into the melt polymer material a carbon black coated with a compatibilizing agent selected from the group consisting of fatty acids of 8-24 carbon atoms, ethoxylated fatty acids of 8-24 carbon atoms, fatty acid esters of 8-24 carbon atoms, phthalic esters of 8-24 carbon atoms, sorbitan esters, monoglycerides, mineral oils, silicone oils, and polyethylene glycols; c) further incorporating into the melt polymer material at an elevated pressure a blowing agent to form a foamable gel; and d) expanding the foamable gel at a lower pressure to form a foam structure.
Claim 2
Dependent Claim
114 words
A process for making a plastic polymer foam structure, comprising: a) heating a plastic polymer material to form a melt polymer material; b) incorporating into the melt polymer material a carbon black coated with a compatibilizing agent selected from the group consisting of fatty acids of 8-24 carbon atoms, ethoxylated fatty acids of 8-24 carbon atoms, fatty acid esters of 8-24 carbon atoms, phthalic esters of 8-24 carbon atoms, sorbitan esters, monoglycerides, mineral oils, silicone oils, and polyethylene glycols; c) further incorporating into the melt polymer material at an elevated pressure a blowing agent to form a foamable gel; and d) expanding the foamable gel at a lower pressure to form a foam structure.
Claim 3
Dependent Claim
12 words
The process of claim 1, wherein the carbon black is thermal black.
Claim 4
Dependent Claim
12 words
The process of claim 1, wherein the carbon black is furnace black.
Claim 5
Dependent Claim
12 words
The process of claim 1, wherein the compatibilizing agent is dibutyl phthalate.
Claim 6
Dependent Claim
28 words
The process of claim 1, wherein the foamable gel is expanded by extruding it through a die to a zone of lower pressure to form the foam structure.
Claim 7
Dependent Claim
22 words
The process of claim 5, wherein the foamable gel is cooled to an optimum foaming temperature prior to extrusion through the die.
Claim 8
Dependent Claim
16 words
The process of claim 6, wherein a nucleating agent is incorporated into the melt polymer material.
Claim 9
Dependent Claim
12 words
The process of claim 1, wherein the plastic material is a polystyrene.
Claim 10
Dependent Claim
12 words
The process of claim 1, wherein the plastic material is a polyethylene.
Claim 11
Dependent Claim
12 words
The process of claim 6, wherein the carbon black is thermal black.
Claim 12
Dependent Claim
12 words
The process of claim 6, wherein the compatibilizing agent is dibutyl phthalate.
Claim 13
Dependent Claim
12 words
The process of claim 6, wherein the plastic material is a polystyrene.
Claim 14
Dependent Claim
12 words
The process of claim 6, wherein the plastic material is a polyethylene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |