Back to results
US 5,783,280 AGranted
Rigid thermal insulation
AssigneeSolv-Ex Corporation
InventorsJohn S. Rendall, Massoud Ahghar
Life of this patent
Estimating the term…
Abstract
An insulation material comprising the double salt of aluminum potassium sulphate and method of producing such. Aluminum sulphate materials and potassium sulphate materials are combined to form aluminum potassium sulphate which is then dehydrated to remove the water of hydration. Porous forms are made by mixing the hydrated aluminum potassium sulphate with a binder before dehydration. The resultant dehydrated sulphate expands greatly to provide an insulative material which is of lightweight and inorganic.
Claims6
A rigid insulation, comprising:
- a rigid foam obtained from a mix of a hydrated crystlline form of a double salt of aluminum potassium sulphate Al.sub.2 K.sub.2 (SO.sub.4).sub.4 precipitated from a liquor, and a binding agent, wherein heat has been used to dehydrate said double salt of aluminum potassium sulphate to-cause, it and said binding agent to foam and expand within a mold;
- a thin-film coating of carbon releasing agent on the foam that provides for a separation of the foam from said mold;
- and
- a backing sheet attached to a surface of the foam and releasing agent and providing for moisture and abrasion protection.
1 more element
Dependencies are inferred from the claim text.