Preparation of heat barrier materials
AssigneePlastonium, Inc.
InventorRudy W. Gunnerman
Life of this patent
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Abstract
Heat barrier materials are prepared by forming an intimate admixture of alkaline earth sulfate and finely divided carbonaceous material into a shaped composition and subjecting said shaped composition to a high temperature to cause a surface reaction to produce a coating comprising alkaline earth sulfide on the surface of said shaped composition.
Claims12
The method of forming a heat barrier which includes applying to a surface of a shaped intimate admixture of alkaline earth sulfate and thermosetting plastic of reduced particle size, a heat source to produce an adherent alkaline earth sulfide layer upon said surface to thereby form a a heat barrier coating resistant to the penetration of thermal energy into the body of said admixture, and using said admixture as a heat barrier material.
The method for forming a heat barrier including the steps of
- a. holding a thermosetting plastic of reduced particle size in intimate contact within a shaped matrix of alkaline earth sulfate hydrate,
- b. heating the surface of the composition so formed with a reducing flame to an elevated temperature at which the thermosetting plastic decomposes,
- c. reacting the carbon produced by the decomposition of the thermosetting plastic at said surface with the sulfate to reduce the sulfate at said surface to a sulfide, and to form an adherent heat barrier coating upon said surface, and
- d. using said composition as a heat barrier.
The method of forming a heat barrier which comprises
- a. bonding in intimate contact an alkaline earth sulfate with thermosetting plastic of reduced particle size to form a shaped article,
- b. applying to the surface of said shaped article a high temperature reducing flame to produce thereon an alkaline earth sulfide coating resistant to the transmission of thermal energy, and
- c. using said article as a heat barrier.
The method of forming a heat barrier which comprises
- a. mixing an alkaline earth sulfate with carbonaceous material comprising a carbon-containing material which will coke or char under the influence of heat to provide available carbon and having a maximum average particle size below about 500 microns,
- b. forming the resulting mixture into a shaped material,
- c. applying to the surface of the shaped material a high temperature atmosphere to produce thereon a coating of alkaline earth sulfide resistant to the transmission of thermal energy and
- d. using said shaped material as a heat barrier.
Dependencies are inferred from the claim text.