Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1975-12-31
1977-09-13
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
260 25B, 260 25E, 260 4243, 264 459, 264 53, 264211, 264DIG5, 264DIG13, 264DIG17, B29D 2700
Patent
active
040482081
ABSTRACT:
Expanded styrene polymer sheet material is produced by extruding expandable and/or general purpose styrene polymer with a conventional blowing agent, a nucleating system and small amounts of finely divided hydrophilic silicon dioxide and alkaline earth metal oxide. The resulting product has very fine, uniformly sized pores and improved flexibility.
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patent: 3696061 (1972-10-01), Selsor et al.
patent: 3933731 (1976-01-01), Machi et al.
patent: 3943089 (1976-03-01), Harpula et al.
patent: 3950484 (1976-04-01), Egli
"The Condensed Chemical Dictionary," Eighth edition, revised by Gessner G. Hawley, New York, Van Nostrand Reinhold, c 1971, pp. 148, 446, 783.
Cabot Corp. Bulletins "Cab-O-Sil, a New Colloidal Silica," Boston, Mass., Cabot Corp., Nov. 1958, c Pha-1. pp. 1-5.
Spicuzza, Jr. John P.
Sutej Joseph M.
Anderson Philip
ARCO Polymers, Inc.
Reap Coleman R.
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