Process for controlling bead size in the manufacture of expandab

Details Process for controlling bead size in the manufacture of expandab Process for controlling bead size in the manufacture of expandab

1984-08-27

1986-09-02

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264DIG9, 264DIG15, 521 56, C08J 922, C08J 920

Patent

active

046095128

ABSTRACT:
A process for controlling bead size in the manufacture of expandable styrene polymers by suspension polymerization, wherein, referred to the aqueous phase, a concentration of ions of calcium, aluminum, metals of the 1st, 2nd, or 6th through 8th side groups of the period table of elements of 3.times.10.sup.31 5 to 3.times.10.sup.-2 % by mass is established, these metal ions being present as cations in the higher oxidation stage of water-soluble, inorganic salts.

REFERENCES:
patent: 3462380 (1969-08-01), Ronden et al.
patent: 4361656 (1982-11-01), Mostafa

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