Synthesis of high molecular weight anionic dispersion polymers

Details Synthesis of high molecular weight anionic dispersion polymers Synthesis of high molecular weight anionic dispersion polymers

1996-03-20

1997-02-25

Zemel, Irina S.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525301, 525266, 525308, 525309, 520210, 520234, 520240, 526328, 5263184, C08F 216

Patent

active

056059701

ABSTRACT:
A process for synthesizing high molecular weight anionic dispersion polymer is disclosed, the process comprising providing a mixture of water, acrylic acid and a stabilizer; cooling the mixture to a temperature of less than 35.degree. C.; lowering the pH of the mixture to less than 4.5; adding ethylhexyl acrylate to the mixture to form an aqueous solution; stirring the aqueous solution; purging the solution with nitrogen simultaneous with the step of stirring; heating the solution to about 48.degree. C.; adding initiator for from about 2 to about 3 hours; heating the solution to about 75.degree. C. for about 30 to about 60 minutes; and cooling and collecting the polymer.

REFERENCES:
patent: 3493500 (1970-02-01), Volk
patent: 4929655 (1990-05-01), Takeda
patent: 5373066 (1994-12-01), Rebre

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