Highly efficient cement dispersants

US6284867A · kind A · utility

Assignee

• MBT Holding AG · CH

Inventors

• Thomas M. Vickers, Jr. · Powell, US
• Runhai Lu · Vernon Hills, US
• Lynn E. Brower · Solon, US
• Samy M. Shendy · Cuyahoga Falls, US
• Rainer Packe-Wirth · Trostberg, DE
• Hong P. Gao · Austin, US

Key dates

• Filing date: Jun 12, 2000
• Grant date: Sep 4, 2001
• Expiry date: Jun 12, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/408
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A substantially non-crosslinked polymer cementitious composition dispersant for the improvement of the fluidity of cementitious compositions comprising hydrophilic side chain substituted polyimide or polyamide backbone units, having at least some proportion of grafted oligomeric or polymeric hydrophilic side chains linking at least one of amides, esters, and thioesters, wherein the polymer cementitious composition is water soluble, and wherein crosslinking is such that in a statistical sampling there is greater than zero to less than 0.1 mole % of backbone units involved in crosslinking.