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...
Patent
1989-12-14
1992-03-03
Bleutge, John C.
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...
524531, 525285, C08K 0507, C08F25502
Patent
active
050933990
ABSTRACT:
A process for preparing a free-flowing powder is disclosed, which powder is useful in primer compositions. The process comprises the steps of (a) dissolving a polar group-containing modified propylene polymer (MPP) at an elevated temperature in a solvent for the MPP, (b) cooling the solution to precipitate particles of the MPP, (c) collecting the precipitated particles by simultaneously centrifuging and spraying the particles with a liquid capable of removing the solvent from the particles and which is also a solvent for a film forming resin, such as an epoxy, which is present in the primer composition, (d) continuing step (c) until substantially all of the solvent for the MPP has been removed from the particles, and (e) collecting the resulting powder, which has an average particle size of less than about 5 microns.
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Bleutge John C.
Morton International Inc.
Nacker Wayne E.
Rutledge L. Dewayne
Sellers II Robert E. L.
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