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US 4,122,203 AGranted
Fire protective thermal barriers for foam plastics
OwnerJoel S. Stahlinventor
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OwnerJoel S. Stahlinventor
Estimating the term…
A foamed polymeric material is coated with a fire protective thermal barrier product. The polymeric material, thus protected, is used for on-site application on walls, ceilings, decks and roofs of buildings. The thermal barrier product (hereafter "thermal barrier" for brevity) is also used to protect foam plastics in fire-resistant factory-made building panels, the exteriors of tanks and other vessels, and the coverings over pipes. The thermal barrier comprises a normally fluent thermosetting synthetic resinous material in which is dispersed an effective amount of hydrated magnesium sulfate and, optionally, inert inorganic fillers, pigments and the like. The thermal barrier is flowed or sprayed onto the foamed polymeric material, optionally, with an adhesive interlayer or "tie-coat" therebetween, to form a fire resistant laminate which laminate meets the "15-minute finish rating" or "hourly rated" requirement of building codes as determined by a testing procedure currently designated ASTM E-119-76, and other fire resistance requirements as determined by other fire resistance tests. A process is disclosed for utilizing compositions belonging to a family of thermal barrier products containing inorganic salts having water of crystallization which is driven off at a temperature from about 200.degree. F but less than 600.degree. F.
A fire-protective thermal barrier comprising a cured thermosetting synthetic resinous material having dispersed therein an effective amount of a finely divided, crystalline, hydrated inorganic salt extender, sufficient to provide a predetermined level of fire resistance as specifically determined by ASTM E-119-76 or other fire resistance testing procedures, said hydrated extender being characterized by having at least 35% by weight water of crystallization, the major portion of which is released upon heating to a temperature in the range from about 200.degree. F. but below 600.degree. F.
A fire-protective insulating laminate comprising a foam plastic and bonded thereto a thermal barrier comprising a cured thermosetting synthetic resinous material having dispersed therein an effective amount of a finely divided, crystalline, hydrated inorganic salt extender, sufficient to provide a predetermined level of fire resistance as determined specifically by a testing procedure designated ASTM E-119-76, or other fire resistance testing procedures, said hydrated extender being characterized by having at least 35% by weight water of crystallization, the major portion of which is released upon heating to a temperature in the range from about 200.degree. F. but below 600.degree. F.
A fire-protective insulating panel comprising an inner and outer skin and a laterally coextensive laminate bonded thereto, said laminate comprising a foam plastic and bonded to one side a thermal barrier comprising a cured thermosetting synthetic resinous material having dispersed therein an effective amount of a finely divided, crystalline, hydrated inorganic salt extender, sufficient to provide a predetermined level of fire resistance as specifically determined by testing procedure designated ASTM E-119-76, or other fire resistance testing procedures, said hydrated extender being characterized by having at least 35% by weight of crystallization, the major portion of which is released upon heating to a temperature in the range from about 200.degree. F. but below 600.degree. F.
A spraying or flowing method for forming a fire-protective laminate comprising a foam plastic and, bonded thereto, a thermal barrier comprising a mixture of liquid thermosetting synthetic resin and said inorganic material dispersed therein, said method comprising:
Dependencies are inferred from the claim text.