Zeolites as smoke suppressants for halogenated polymers
AssigneePennwalt Corporation
InventorsStanley R. Sandler, John C. Wetzel
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Abstract
Zeolites and metal-ion exchanged zeolite are used to impart smoke suppressant characteristics to halogenated polymers.
Claims15
A composition comprising 100 parts by weight of a halogenated polymer and 0.1 to 30 parts by weight of a smoke suppressant selected from the group consisting of completely and partially metal-ion exchanged zeolites, both naturally occurring and synthetic, and mixtures thereof, wherein the exchanged metal is selected from from the group consisting of V, Mo, Mn, Fe, Co, Ni, Cu, Zn, Sb, Bi and mixtures thereof, the zeolite being represented by the general formula:
- M.sub.2/n O.Al.sub.2 O.sub.3.XSiO.sub.2.YH.sub.2 O
- where
- M is a metal, selected from the group consisting of alkali and alkaline earth metals, V, Mo, Mn, Fe, Co, Ni, Cu, Zn, Sb, Bi and mixtures thereof;
- n is the cation valence;
- X lies between 0.1 and 20 inclusive
- Y is the number of moles of water of crystallization and has a value of 0 to 20.
A process for preparing a low smoke halogenated polymer using 0.1 to 30 parts by weight per 100 parts by weight of polymer of a smoke suppressant selected from the group consisting of completely and partially metal-ion exchanged zeolites, both naturally occurring and synthetic, and mixtures, wherein the exchanged metal is selected from the group consisting of V, Mo, Mn, Fe, Co, Ni, Cu, Zn, Sb, Bi, and mixtures thereof, the zeolite being represented by the general formula:
- M.sub.2/n O.Al.sub.2 O.sub.3.XSiO.sub.2.YH.sub.2 O
- where M is a metal, selected from the group consisting of alkali and alkaline earth metals, V, Mo, Mn, Fe, Co, Ni, Cu, Zn, Sb, Bi and mixtures thereof;
- n is the cation valence;
- X lies between 0.1 and 10, inclusive;
- Y is the number of moles of water of crystallization and has a value of 0 to 20 inclusive.
Dependencies are inferred from the claim text.