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US 4,394,460 AGranted
Ethylene-chlorotrifluoroethylene copolymer foam
AssigneeAllied Corporation
InventorsDaniel C. Chung, William A. Miller, Eugene R. Baumgaertner
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Abstract
A foam composition comprising an ethylene-chlorotrifluoroethylene copolymer, a blowing agent and a nucleating agent. The nucleating agent is the carbonate or oxide of a metal cation from the group of metals consisting of magnesium, calcium, barium, zinc and lead. The invention also is a method of making the above foam copolymer composition.
Claims34
A composition comprising:
- a copolymer of ethylene and chlorotrifluoroethylene, the copolymer having between 40 and 60 mol percent of ethylene units and correspondingly between about 60 and about 40 mol percent of chlorotrifluoroethylene units;
- an effective amount of a blowing agent selected from the group consisting of hydrozodicarboxylates, diesters of azodiformic acid and carbazides;
- and
- at least one nucleating agent selected from the group consisting of talc, magnesium carbonate, calcium carbonate, barium carbonate, zinc carbonate, lead carbonate, magnesium oxide, calcium oxide, barium oxide, zinc oxide and lead oxide.
1 more element
The composition as recited in claim 8 wherein the carbazide is p-toluene sulfonyl semicarbazide.
A composition comprising:
- a copolymer of ethylene and chlorotrifluoroethylene, the copolymer having between 40 and 60 mol percent of ethylene units and correspondingly between about 60 and about 40 mol percent of chlorotrifluoroethylene units;
- an effective amount of a chemically decomposing blowing agent;
- and
- calcium carbonate.
1 more element
Dependencies are inferred from the claim text.