초록 ▼

The present invention is directed to an insulating coating for refractory articles, adapted to be applied by spraying or gunning, which is easy to apply, cost effective, eliminates the potential health hazards associated with ceramic fiber paper, and which imparts sufficient insulating properties to

The present invention is directed to an insulating coating for refractory articles, adapted to be applied by spraying or gunning, which is easy to apply, cost effective, eliminates the potential health hazards associated with ceramic fiber paper, and which imparts sufficient insulating properties to the refractory article in high temperature environments. More particularly, the present invention is directed to an insulating coating and a method of preparing the insulating coating wherein the coating composition is comprised of about 25% to about 75% by weight of lightweight aggregate, up to about 25% to about 75% by weight of binder, up to 0.5% by weight of organic fiber, up to about 15% by weight of an additive to improve green strength, and up to about 5% by weight of a foaming agent.

대표청구항 ▼

[ Having thus described the invention, it is claimed:] [1.] An insulating coating composition for application to a refractory article by spraying or gunning, said coating composition comprising:about 25% to about 75% by weight of a lightweight aggregate wherein said lightweight aggregate is selected

[ Having thus described the invention, it is claimed:] [1.] An insulating coating composition for application to a refractory article by spraying or gunning, said coating composition comprising:about 25% to about 75% by weight of a lightweight aggregate wherein said lightweight aggregate is selected from the group consisting of hollow ceramic microspheres, phenolic microballoons, mullite holospheres, perlite, vermiculite, bubble alumina, and mixtures thereof;about 25% to about 75% by weight of a binder wherein said binder is selected from the group consisting of colloidal silica, calcium aluminate cement, sodium silicate, and mixtures thereof;about 0.1% to about 0.5% by weight of organic fiber;about 5.5% to about 15% by weight of an additive to improve green strength wherein said additive is selected from the group consisting of ball clay, lignins, saccarides, aliphatics, and mixtures thereof; andabout 2.2% to about 5% by weight of a foaming agent wherein said foaming agent is selected from the group consisting of ionic surfactants, anionic surfactants, and mixtures thereof.