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US 2017/0107152 A1Published application
Light Weight Gypsum Fiber Panel Suitable for Use as Roof Cover Board
AssigneeUnited States Gypsum Company
InventorsYufeng Xu, Eugene S. STIVENDER
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Abstract
A roof cover board made from a mixture of 30-60% stucco; 20-50% perlite; 10-30% cellulose fiber; 3-20% starch; and siloxane. Also disclosed is a stucco-free roof cover board made from a mixture of 30-60% perlite, 30-60% cellulose fiber, 5-25% starch; and siloxane. Also disclosed are methods for making same.
Claims20
A roof cover board made from a mixture of, on a water free basis, in wt. %:
- 30-60% stucco;
- 20-50% perlite;
- 10-30% cellulose fiber;
- 3-20% starch;
- and
- siloxane.
3 more elements
A roof cover board made from a mixture of, on a water free basis, in wt. %:
- 30-60% perlite,
- 30-60% recycled fiber,
- 5-25% starch, and
- siloxane;
- having an absence of gypsum,
- having an absence of bituminous material,
- having an absence of newsprint, and
- containing less than 5% polymer.
5 more elements
Dependencies are inferred from the claim text.