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US 5,397,807 AGranted
Compatibilized carbon black and a process and a method for using
AssigneeThe Dow Chemical Company
InventorsMartin K. Hitchcock, Kyung W. Suh, Arnold M. Bartz, Andrew N. Paquet, William G. Stobby
Life of this patent
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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.
Claims13
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.
2 more elements
Dependencies are inferred from the claim text.