Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-06-01
1989-03-21
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 60, 526281, 526282, C08J 920
Patent
active
048143553
ABSTRACT:
The polymerization of compositions containing styrene by an aqueous suspension process in which is used a suspending agents system constituted by a mineral agent and, an extending agent which is at least a rosin acid derivative (abietic acid, neoabietic acid, dextropimaric acid) or their salts of a metal belonging to Group IIa of the Periodic Classification of elements. The use of this extending agent has the advantage to ameliorate the surface aspect of moulded articles obtained from expanded polymer pearls prepared with the above polymerization process.
REFERENCES:
patent: 3526605 (1970-09-01), Ingram
Foelak Morton
Societe Chimique des Charbonnages SA Tour Aurore
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