C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1725
C08L 53/00 (2006.01) C08K 3/26 (2006.01) C08K 13/02 (2006.01)
Patent
CA 1094730
ABSTRACT OF THE DISCLOSURE The flame resistance imparted to (inter alia) poly- propylene by a combination of basic bismuth carbonate and suitably chlorinated paraffin wax, according to U.K. Patent 1,516,548, is extended to impact-resistant compositions of thermoplastic propylene-ethylene block copolymers compounded with a minor proportion of elastomeric ethylene-propylene co- polymer, by the additional presence of a defined triazine compound and a defined brominated organic compound. The former, present to the extent of 0.3-1.3% w/w on the total composition, may be melamine, ammeline, ammelide, acetoguan- amine, benzoguanamine or isocyanuric acid. The brominated organic compound, present in an amount of 0.5-10% w/w, may be penta-,deca- or octa- bromodiphenyl oxide, 1.2-bis (2.4.6- tribromo-phenoxy)ethane, pentabromophenol, pentabromotoluene or ethyl pentabromobenzene. A typical composition is 90.5 parts of block copolymer containing 20% of the eloastomer, 1 part of bismuth subcarbonate, 1 part of melamine, 3.5 parts of chlorinated paraffin wax (70% chlorine), 3.5 parts of decabro- modiphenyl oxide together with 0.5 parts of dibutyltin maleate (anti-acid stabilizer).
314148
Bertelli Guido
Locatelli Renato
Roma Pierpaolo
Montedison S.p.a.
Stewart & Kolash Ltd
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