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US 4,308,070 AGranted
Asbestos-free composition for millboard for use at high temperatures
AssigneeGAF Corporation
InventorErnest A. Cavicchio
Life of this patent
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Abstract
An asbestos-free millboard formulation is provided which includes from about 5 to 20% of a cellulosic fiber, from 40 to 15% barytes, from 10 to 50% cement and from 15 to 40% of an inorganic filler selected from the group consisting of talc, diatomaceous earth, silicates, carbonates and mixtures thereof. The formulation can be processed on conventional millboard manufacturing equipment.
Claims14
An asbestos-free milboard comprising from about
- 5 to 20% cellulosic fibers,
- 10 to 50% inorganic binder,
- 40 to 15% barytes, and
- 40 to 15% inorganic filler,
- said percentages being on a dry weight basis.
2 more elements
Dependencies are inferred from the claim text.