Extruded solid composite articles and compositions for producing same
AssigneeKoslow Technologies Corporation
InventorEvan E. Koslow
Life of this patent
Estimating the term…
Abstract
Extruded composite solid articles from feed mixtures comprising a substantially uniform mixture of particulate binder material and particulate primary material in which the feed mixture is forced through an extrusion die of substantially uniform cross-section and subject to heat, pressure and cooling which consolidates the feed mixture whereby it emerges from the die as a solid composite article and in which the pressure in the extrusion die is supplied by back-pressuring means external of the die. Solid filter elements of activated carbon particles for a wide variety of filtering applications may be formed.
Claims14
An extruded composite solid article formed by extrusion of an extrudable composition comprising a substantially uniform mixture of:
- a) about 50% to about 70% by weight activated carbon particles as powdered or granular primary particles having a diameter of from about 0.1 to about 3000 micrometers;
- b) about 27.5% to about 37.5% by weight lubricating oil;
- c) about 4.0% to about 22.5% by weight thermoplastic binder particles having a diameter of from about 0.1 to about 250 micrometers and optionally
- d) up to about 3% by weight solid state lubricant, and
- wherein said activated carbon particles have a softening temperature at least about 25.degree. C. above the softening temperature of the binder particles.
An extruded composite solid article formed by extrusion of an extrudable composition comprising a substantially uniform mixture of:
- a) about 20 to about 60% by weight activated carbon particles;
- and
- b) about 27.5% to about 65% by weight micronized manganese dioxide particles of at least about -100 mesh size
- as powdered or granular primary particles having a diameter of from about 0.1 to about 3000 micrometers, and
- c) about 12.5% to about 22.5% by weight thermoplastic binder particles having diameters between about 0.1 and about 250 micrometers, and
- wherein said activated carbon particles have a softening temperature at least about 25.degree. C. above the softening temperature of the binder particles.
An extruded composite solid article formed by extrusion of an extrudable composition comprising a substantially uniform mixture of:
- a) about 80% to about 88.5% by weight activated carbon particles as powdered or granular primary particles having a diameter of from about 0.1 to about 3000 micrometers;
- and
- b) about 12.5% to about 20% by weight binder particles having diameters between about 0.1 and about 250 micrometers, and
- wherein said activated carbon particles have a softening temperature at least about 25.degree. C. above the softening temperature of the binder particles.
A composition comprising a substantially uniform mixture of:
- a) about 50% to about 70% by weight activated carbon particles as powdered or granular primary particles having a diameter of from about 0.1 to about 3000 micrometers;
- b) about 27.5% to about 37.5% by weight lubricating oil;
- c) about 4.0% to about 22.5% by weight thermoplastic binder particles having diameter of from about 0.1 to about 250 micrometers and optionally
- d) up to about 3% by weight solid state lubricant, and
- wherein said activated carbon particles have a softening temperature at least about 25.degree. C. above the softening temperature of the binder particles.
A composition comprising a substantially uniform mixture of:
- a) about 80% to about 88.5% by weight activated carbon particles as powdered or granular primary particles having a diameter of from about 0.1 to about 3000 micrometers;
- and
- b) about 12.5% to about 20% by weight thermoplastic binder particles having diameters between about 0.1 and about 250 micrometers, and
- wherein said activated carbon particles have a softening temperature at least about 25.degree. C. above the softening temperature of the binder particles.
Dependencies are inferred from the claim text.