Fire resistant jacket composition for electrical coaxial and fiber optic cable
AssigneePolymer Products Company, Inc.
InventorsElisabeth S. PAPAZOGLOU, Don Gary BARBER
Life of this patent
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Abstract
Zeolite-containing polyvinyl chloride containing compositions that are useful as the insulation for plenum cables are disclosed. A zeolite, either natural or synthetic, can satisfactorily replace either part or all of the molybdenum compound, particularly ammonium octamolybdate, in low smoke polyvinyl chloride based plenum compositions. Ion-exchanged zeolites, such as the zinc ion-exchanged zeolite can also be used. Zeolites are especially useful in lead-free Low Smoke PVC compositions. Because the cost of zeolite is only a fraction of the cost of the molybdenum compounds currently used in plenum cable compositions, this will dramatically reduce the cost of these materials.
Claims40
A composition comprising a 100 parts of chlorinated base polymer and greater than 2 parts of (a) a zeolite, (b) an ion-exchanged zeolite in which at least part of the cations in the ion-exchanged zeolite contain an element selected from the group consisting of Al, V, Mo, Mn, Fe, Co, Ni, Cu, Sn, Zn, Cr, Ti, Zr, W, Sb, Bi, B, and P, or (c) a mixture thereof, in which the composition has a limiting oxygen index of 43 or higher and a smoke value of less than 300 m2/Kg in a cone calorimeter test.
A composition comprising:
- (a) 100 parts of a base polymer selected from the group consisting of polyvinyl chloride and mixtures of polyvinyl chloride and chlorinated polyvinyl chloride in which the chlorinated polyvinyl chloride comprises 25 wt % of less of the mixture of the polyvinyl chloride and the chlorinated polyvinyl chloride;
- (b) 20 to 60 parts of a plasticizer, a brominated phthalate, a phosphate plasticizer, or a mixture thereof;
- (c) 2 to 20 parts of a thermal stabilizer or a mixture of thermal stabilizers;
- (d) 10 to 100 parts of a metal hydroxide or mixture of metal hydroxides;
- (e) 0 to 20 parts of a molybdenum compound or a mixture of molybdenum compounds;
- (f) 5 to 35 parts of a zeolite or mixture of zeolites, an ion-exchanged zeolite or a mixture of ion-exchanged zeolites, or a mixture thereof;
- wherein:
- the composition has a limiting oxygen index of 43 or higher,
- the composition has a smoke value of less than 300 m2/Kg in the cone calorimeter test, and
- at least part of the cations in the ion-exchanged zeolite contain an element selected from the group consisting of Al, V, Mo, Mn, Fe, Co, Ni, Cu, Sn, Zn, Cr, Ti, Zr, W, Sb, Bi, B and P.
A master batch comprising:
- (a) 20 parts of a base polymer selected from the group consisting of polyvinyl chloride and mixtures of polyvinyl chloride and chlorinated polyvinyl chloride in which the chlorinated polyvinyl chloride comprises 25 wt % of less of the mixture of the polyvinyl chloride and the chlorinated polyvinyl chloride;
- (b) 20 to 60 parts of a plasticizer, a brominated phthalate, a phosphate plasticizer, or a mixture thereof;
- (c) 2 to 20 parts of a thermal stabilizer or a mixture of thermal stabilizers;
- (d) 10 to 100 parts of a metal hydroxide or mixture of metal hydroxides;
- (e) 0 to 20 parts of a molybdenum compound or a mixture of molybdenum compounds;
- (f) 5 to 35 parts of a zeolite or mixture of zeolites, an ion-exchanged zeolite or a mixture of ion-exchanged zeolites, or a mixture thereof.
A master batch comprising:
- (a) 20 parts of a base polymer selected from the group consisting of polyvinyl chloride and mixtures of polyvinyl chloride and chlorinated polyvinyl chloride in which the chlorinated polyvinyl chloride comprises 25 wt % of less of the mixture of the polyvinyl chloride and the chlorinated polyvinyl chloride;
- (b) 20 to 60 parts of a plasticizer, a brominated phthalate, a phosphate plasticizer, or a mixture thereof;
- (c) 2 to 20 parts of a thermal stabilizer or a mixture of thermal stabilizers;
- (d) 10 to 100 parts of a metal hydroxide or mixture of metal hydroxides;
- (e) 0 to 20 parts of a molybdenum compound or a mixture of molybdenum compounds;
- (f) 5 to 35 parts of a zeolite or mixture of zeolites, an ion-exchanged zeolite or a mixture of ion-exchanged zeolites, or a mixture thereof;
- wherein:
- at least part of the cations in the ion-exchanged zeolite contain an element selected from the group consisting of Al, V, Mo, Mn, Fe, Co, Ni, Cu, Sn, Zn, Cr, Ti, Zr, W, Sb, Bi, B and P.
A composition comprising:
- (a) 100 parts of a base polymer selected from the group consisting of polyvinyl chloride and mixtures of polyvinyl chloride and chlorinated polyvinyl chloride in which the chlorinated polyvinyl chloride comprises 25 wt % of less of the mixture of the polyvinyl chloride and the chlorinated polyvinyl chloride;
- (b) 20 to 60 parts of a plasticizer, a brominated phthalate, a phosphate plasticizer, or a mixture thereof;
- (c) 2 to 20 parts of a thermal stabilizer or a mixture of thermal stabilizers;
- (d) 10 to 100 parts of a metal hydroxide or mixture of metal hydroxides;
- (e) 2 to 10 parts of a molybdenum compound or a mixture of molybdenum compounds;
- (f) 5 to 35 parts of an ion-exchanged zeolite or a mixture of ion-exchanged zeolites, or a mixture thereof;
- wherein:
- the composition has a limiting oxygen index of 41 or higher,
- the composition has a smoke value of 300 m2/Kg or less in a cone calorimeter test, and
- at least part of the cations in the ion-exchanged zeolite contain an element selected from the group consisting of Al, V, Mo, Mn, Fe, Co, Ni, Cu, Sn, Zn, Cr, Ti, Zr, W, Sb, Bi, B, and P.
Dependencies are inferred from the claim text.