High surface area magnesia curing agent

C - Chemistry – Metallurgy – 08 – L

Patent

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Details

C08L 61/06 (2006.01) B22C 1/22 (2006.01) B22C 9/02 (2006.01) C08K 3/22 (2006.01) C08K 3/36 (2006.01)

Patent

CA 2473243

Binder compositions of the present invention are useful in refractory and foundry applications. The compositions include an aggregate, a liquid resole resin, and a magnesium hardening agent. The compositions are workable and exhibit high compressive strengths in a short period of time. Additionally, the compositions have a low free phenol content and require a reduced resin content as compared to currently known compositions. The compositions reduce the cost to produce useful binders by eliminating the requirement for ester caning in addition to requiring reduced amounts of resin to obtain adequate compressive strength.

Les compositions de liants de la présente invention sont utiles dans des applications de réfractaires et de fonderie. Lesdites compositions comprennent un agrégat, un résol liquide et un agent de durcissement de magnésium. Lesdites compositions peuvent être travaillées et elles présentent des résistances à la compression élevées dans une courte durée. De plus, lesdites compositions présentent une faible teneur en phénols libres et nécessitent une teneur en résines diminuée comparé aux compositions actuellement connues. Lesdites compositions diminuent le coût de production de liants utiles étant donné qu'elles éliminent la nécessité de faire durcir l'ester en plus de nécessiter des quantités moindres de résine pour obtenir une résistance à la compression adéquate.

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