C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
400/1358, 400/54
C08K 5/34 (2006.01) C08K 5/3477 (2006.01) C08K 5/3492 (2006.01) C08K 13/02 (2006.01) C08L 23/02 (2006.01) C08L 25/06 (2006.01)
Patent
CA 1129133
ABSTRACT A thermoplastic polymer, especially polystyrene or polypropylene, useful in the production of paints and varnishes, has its inflammability reduced by incorporation of a flame- proofing additive of the kind comprising an (a) ammonium or amine phosphate (especially ammonium metaphosphate) and (b) one or more organic compounds which on thermal decomposition evolve an uninflammable gas or vapour and leave a carbonaceous residue, the novel feature being that an ester of isocyanuric acid of the formula: Image in which R1, R2 and R3, which may be the same or different, are linear or ramified alkylene groups having 1 - 6 chain-linked carbon atoms, and Z1, Z2 and Z3 are -OH or groups,is incorporated. Suitable proportions Image are 5 - 30% by weight on the total composition for (a) and for (b) + (c), whilst the (b)/(c) weight ratio should be from 10:1 to 1:10. The components (b) and (c) are desirably cross-linked e.g. by formaldehyde, and may be mutually condensed. Thus as (b) + (c) a melamine/tris(2-hydroxyethyl) isocyanurate/formalde- hyde condensate may be used. The resultant compositions have improved flame resistance and mechanical characteristics.
311174
Montedison S.p.a.
Stewart & Kolash Ltd
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