Foamed radiation-crosslinked high density polyethylenes

Details Foamed radiation-crosslinked high density polyethylenes Foamed radiation-crosslinked high density polyethylenes

1977-12-14

1980-01-29

Turer, Richard B.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415918, 521 95, 521143, 521915, C08F 246, C08F 818

Patent

active

041860683

ABSTRACT:
Foamed radiation-crosslinked high density polyethylenes having substantially closed cells and uniform structure are made from radiation-crosslinked high density polyethylene compositions comprising thermosensitive foaming agents by heating such compositions while excluding molecular oxygen from contact therewith during that heating and foaming step. Oxygen is excluded by providing an oxygen-free inert gas atmosphere or by submerging the foamable material beneath the surface of a body of liquid heat transfer medium during the heating and foaming step.

REFERENCES:
patent: 3098831 (1963-07-01), Carr
patent: 3470119 (1969-09-01), Benning et al.
patent: 3562367 (1971-02-01), Shinohara et al.
patent: 3711584 (1973-01-01), Sagane et al.
patent: 3852177 (1974-12-01), Atchinson et al.
J. Polymer Sci., 32, 257-290, Lawton et al., 1958.
Benning, C. J., Plastic Foams, published by John Wiley & Sons, p. 334, 1969.

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