Aqueous suspension polymerization process of compositions contai

Details Aqueous suspension polymerization process of compositions contai Aqueous suspension polymerization process of compositions contai

1989-01-11

1989-08-22

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524764, 521 56, 521 60, 526281, 526282, C08L 2300

Patent

active

048597309

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 of ameliorate the surface aspect of moulded articles obtained from expanded polymer pearls prepared with the above polymerization process.

REFERENCES:
patent: 2870107 (1959-01-01), Reynolds
patent: 3526605 (1970-09-01), Ingram
patent: 3844996 (1974-10-01), Fichteman
patent: 3988275 (1976-10-01), Satake et al.
patent: 4302371 (1981-11-01), Matsuo et al.

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