Method for producing phosphoric acid ester-based polymer

Details Method for producing phosphoric acid ester-based polymer Method for producing phosphoric acid ester-based polymer

2011-06-21

2011-06-21

Cain, Edward J (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S277000

Reexamination Certificate

active

07964682

ABSTRACT:
Method for producing phosphoric acid ester-based polymer by copolymerizing monomer 1 of formula (1), monomer 2 of formula (2), and monomer 3 of formula (3):wherein the variables are as defined in the specification;wherein the variables are as defined in the specification; andwherein the variables are as defined in the specification, at pH ≦7 in solvent having dissolved oxygen concentration of 0.01-4.0 mg/kg, or in presence of phosphonic acid-based chelating agent, or by mixing monomers 1 to 3 at 10-50 ° C., initiating polymerization within 72 hours, and maintaining the temperature at 10-50 ° C. until polymerization is initiated. The phosphoric acid ester-based polymer may be used as a dispersant in a hydraulic composition.

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