Preparation of comb-branched polymers

Details Preparation of comb-branched polymers Preparation of comb-branched polymers

2007-06-19

2007-06-19

Wu, David W. (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S319000, C526S240000, C524S005000, C560S183000

Reexamination Certificate

active

11430758

ABSTRACT:
A comb-branched polymer is disclosed. The polymer comprises recurring units of an unsaturated carboxylic monomer, an oxypropylene-rich poly(oxyethylene-oxypropylene) macromonomer and an oxyethylene-rich poly(oxyethylene-oxypropylene) macromonomer. The comb-branched polymer can be used as a water reducing agent in cement. It gives significantly lower air entrainment in cement admixture.

REFERENCES:
patent: 4814014 (1989-03-01), Arfaei
patent: 5834576 (1998-11-01), Nagano et al.
patent: 6214958 (2001-04-01), Le-Khac et al.
patent: 6582510 (2003-06-01), Schwartz

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