Expanding process

Details Expanding process Expanding process

1982-03-08

1984-03-20

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264DIG9, 521 57, B29D 2700

Patent

active

044380585

ABSTRACT:
The invention relates to a process of expanding styrene beads which comprises expanding said beads in the presence of a surfactant having a HLB value of 3 to 18 and showing a surface resistance less than 10.sup.14 .OMEGA./cm. By the process, blocking of beads is prevented, antistatic effect can be given to the shaped article and saving of steam used in the course of expanding is achieved.

REFERENCES:
patent: 3086885 (1963-04-01), Jahn
patent: 3697454 (1972-10-01), Trimble
patent: 3819544 (1974-06-01), Pillar et al.
patent: 4003858 (1977-01-01), Biglione et al.
patent: 4020133 (1977-04-01), Altares, Jr.
Emulsions: Theory and Practice, New York, Reinhold, .COPYRGT.1957, pp. 188-197.
Kirk-Othmer Encyclopedia of Chemical Technology, Third Edition, vol. 22, Sulfonation and Sulfation to Thorium and Thorium Compounds, New York, John Wiley & Sons, pp. 360-361.
"The Condensed Chemical Dictionary," Eighth Edition, Revised by Gessner G. Hawley, New York, van Nostrand Reinhold, .COPYRGT.1971, pp. 380, 447, 710, 711, 825.

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