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
1990-11-29
1993-06-01
Michl, Paul R.
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...
524457, 526 78, 526 79, 526 80, 526 81, 526 82, 526 83, 526 84, 526 85, 526 86, 526 87, C08F 222, C08F 224, C08F 238
Patent
active
052160653
ABSTRACT:
A process for emulsion polymerization to form a latex having a particle size greater than about 0.5 micrometers by charging to a reaction vessel under agitation a reaction mixture including water, emulsifiers at an initial concentration slightly greater than or equal to the critical micelle concentration, a protective colloid, ethylenically unsaturated monomers, and an ionically balanced combination of an anionic and a cationic water soluble free radical initiator or a nonionic initiator; reacting the mixture to form an emulsion of polymerized monomer; and adding additional monomer, emulsifier, and protective colloid and a water soluble chain transfer agent to the reactor while continuing to agitate the mixture under conditions such that the emulsifier concentration does not exceed that at which new polymeric nuclei are formed.
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Colyer Emerson K.
Liang Rong-Chang
Reno Elizabeth A. B.
Ruffner, Jr. Charles G.
Michl Paul R.
Niland Patrick
The Mead Corporation
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