Stock material or miscellaneous articles – Composite – Of carbohydrate
Patent
1975-03-19
1976-08-03
McCamish, Marion E.
Stock material or miscellaneous articles
Composite
Of carbohydrate
21 7, 106 15FP, 252 81, 260DIG24, 428921, B32B 2100, B32B 2104
Patent
active
039730743
ABSTRACT:
A flame-proof product comprising a cellulosic base, and particularly a wood based product having at least one surface treated with a composition which when the surface is subjected to fire or high temperatures combines with some of the material of the base to form a protective intumescent coating on the surface which insulates the remainder of the product from thermal destruction. The treating composition includes potassium hydroxide and/or potassium carbonate alone or mixed with a comparatively small amount of sodium hydroxide and/or sodium carbonate. The composition may in addition include potassium chloride, or potassium acetate, or potassium citrate, or potassium bicarbonate, or potassium bisulfite, or potassium metaphosphate, or potassium nitrite, or potassium sulfide, or potassium sulfite, or potassium thiosulfate, or potassium phosphate (tribasic).
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de Lissa Richard C. F.
Schwarze Walter G.
Epstein Henry F.
MacMillan Bloedel Limited
McCamish Marion E.
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