FIELD: chemistry.
SUBSTANCE: fire-resistant unmolded masses or fire-resistant molded products are manufactured from polycondensation product, of new-varnish type, obtained by interaction of considered as wastes remains of bisphenol A with formaldehyde in acidic medium or from polycondensation product, of new varnish type, obtained by interaction of considered as wastes remains of bisphenol A, formaldehyde, and one or several phenol compounds in acidic acid. Fire resistant products are highly resistant to oxidation.
EFFECT: obtaining fire-resistant products highly resistant to oxidation.
7 cl, 4 ex, 3 tbl
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Author |
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| BINDER FOR REFRACTORIES |
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2003 |
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