Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-11-23
1996-08-06
Lipman, Bernard
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
1621647, 1621687, 524217, 524253, 524547, 524560, 526306, 5263077, C08L 304
Patent
active
055434460
ABSTRACT:
A water-soluble terpolymer for use as a dry strength additive for paper consists essentially of the following units: (a) (meth)acrylamide, (b) an ethylenically unsaturated, aliphatic carboxylic acid or a salt thereof, and (c) a water-soluble, polyvinyl monomer, wherein (c) comprises <0.07 mole % based on total monomers; a 1% solution of the terpolymer is capable of passing through a 200 mesh screen substantially without retention of polymer solids, and the terpolymer has a reduced specific viscosity of about 3.0 deciliters/g or less. The process for preparing the polymer includes the step of continuously adding both components of a redox initiator at a controlled rate to provide better control of polymerization and heat evolution.
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Hercules Incorporated
Kuller Mark D.
Lipman Bernard
Patterson Joanne W.
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