Water-soluble polymers of esters made from acrylic acid and...

Details Water-soluble polymers of esters made from acrylic acid and... Water-soluble polymers of esters made from acrylic acid and...

2005-02-01

2005-02-01

Zalukeva, Tatyana (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S322000, C526S291000, C526S318300, C526S319000, C526S323100, C526S330000, C524S558000, C524S832000, C560S198000, C560S199000, C560S205000, C560S212000, C560S218000

Reexamination Certificate

active

06849703

ABSTRACT:
Water-soluble polymers of esters made from acrylic acid and alkylpolyalkylene glycols, obtainable by azeotropic esterification of a mixture of acrylic acid and alkylpolyalkylene glycol in a molar ratio of from 2 to 3:1 in the presence of at least 85% by weight, based on the alkylpolyalkylene glycol, of an organic solvent which forms an azeotrope with water, followed by free-radical polymerization, in an aqueous medium, of the mixture obtained during the esterification, where the organic solvent is distilled off azeotropically from the reaction mixture during the polymerization, and the water removed by distillation is returned to the mixture or replaced by a feed of fresh water, and preparation and use of these polymers as an additive to cementitious systems.

REFERENCES:
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patent: 6166112 (2000-12-01), Hirata et al.
patent: 6214958 (2001-04-01), Le-Khac et al.
patent: 6265495 (2001-07-01), Hirata et al.
patent: 19957177 (2001-08-01), None
patent: 0 884 290 (1998-12-01), None
patent: 0989108 (2000-03-01), None
patent: WO 0140337 (2001-06-01), None
patent: WO 0194518 (2001-12-01), None

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