Cement additives

Details Cement additives Cement additives

1996-03-26

1997-03-25

Green, Anthony

Compositions: coating or plastic

Materials or ingredients

Additive materials for inorganic cements which contain a...

106728, 106810, 524 5, 524558, 526318, 526332, C04B 2424

Patent

active

056140177

ABSTRACT:
Substances useful as water reducing and superplasticizer additives for cement compositions are formed by reaction of carboxylic acid polymers with polyethers of C.sub.2 -C.sub.4 epoxides wherein partial cleavage of the polyether and esterification of the polyether and the cleavage products thereof by the other reactant are achieved. In one embodiment, a sulfonic acid is used to catalyze the reaction of poly(acrylic acid) and a monofunctional ethylene oxide-propylene oxide copolymer at a temperature in excess of 140.degree. C.

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