Oligomeric dispersant

US6133347A · kind A · utility

Assignee

• MBT Holding AG · CH

Inventors

• Thomas M. Vickers, Jr. · Powell, US
• Rainer Packe-Wirth · Trostberg, DE
• Michael Porsch · Minneapolis, US
• Samy M. Shendy · Cuyahoga Falls, US
• Lynn E. Brower · Solon, US
• John Pickett · Kimpton, GB
• Runhai Lu · Vernon Hills, US
• Frank Danko · Macedonia, US

Key dates

• Filing date: Jul 9, 1999
• Grant date: Oct 17, 2000
• Expiry date: Jul 9, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2650/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A cementitious formulation comprising a cement and an oligomeric dispersant is provided. The dispersant is a reaction product of two or three moieties. The first moiety (A) is a nonpolymeric, functional moiety that adsorbs onto a particle, and wherein one or more A moieties together contain at least two residues to provide attachment of the dispersant onto a particle to be dispersed. The second required moiety (C) is a linear or branched water soluble, nonionic polymer that provides the dispersing capability. A third moiety (B), if present, is a nonpolymeric moiety disposed between the first and second moiety, to connect the first and second moieties. A method is provided for dispersing a cementitious formulation comprising a cement in water, including providing in said cementitious formulation the above oligomeric dispersant. A combination of any cement dispersant with an oligomeric dispersant wherein at least one A moiety is blocked is also provided in a cementitious formulation and in a method of making such cementitious formulation.