Intumescent coating composition and an article of manufacture thereof

Claim 1

AN INTUMESCENT COATING COMPOSITION COMPRISING UREA, A SOURCE OF FORMALDEHYDE, A HYDROPHILLIC CARBOHYDRATE, A FILM FORMING AQUEOUS LATEX-LIKE DISPERSION OF A COPOLYMER OF VINYLIDENE CHLORIDE AND VINYL CHLORIDE. AND A FOAM-FORMING INGREDIENT SELECTED FROM THE GROUP CONSISTING OF MONOAMMONIUM PHOSPHATE, DIAMMONIUM PHOSPHATE, PHOSPHORIC ACID, AMMONIUM SULPHATE, SULFAMIC ACID, AMMONIUM SULFAMATE, AMMONIUM BROMIDE, SODIUM TUNGSTATE, SODIUM BORATE AND BORIC ACID, THE FORMALDEHYDE AVAILABLE FROM SAID SOURCE BEING PRESENT IN A RATIO BETWEEN 1 AND 2.5 MOLES PER MOLE OF UREA, THE UREA AND FORMALDEHYDE AVAILABLE FROM SAID SOURCE BEING PRESENT IN THE AMOUNT BETWEEN 20 AND 70 PER CENT OF THE WEIGHT OF THE FOAM-FORMING INGREDIENT, THE CARBOHYDRATE BEING PRESENT IN AN AMOUNT NOT LESS THAN 5 PER CENT OF THE FOAM FORMING INGREDIENT, THE LATEX SOLIDS BEING PRESENT IN THE AMOUNT BETWEN 15 AND 35 PER CENT OF THE WEIGHT OF THE FOAM-FORMING INGREDIENT, AND THE COMBINED WEIGHT OF THE CARBOHYDRATE, THE UREA AND THE FORMALDEHYDE AVAILABLE FROM SAID SOURCE NOT EXCEEDING THE WEIGHT OF THE FOAM-FORMING INGREDIENT.