Perlite-based insulation board
AssigneeJohns Manville International, Inc.
InventorsCraig Donald DePorter, Steven Douglas Dawson, Mauro Vittorio Battaglioli, Christopher Paul Sandoval
Life of this patent
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Abstract
An insulation board suitable for use as a roof insulating board has a density between about 8 and about 15 pounds per cubic foot; a MOR/density ratio of at least 10.5 to 1 and includes, by dry weight, between about 45% and about 76% expanded perlite; between about 15% and about 45% cellulosic fibers; between about 0.1% and about 10% latex binder; between about 2% and about 9% bituminous material; and about 0% to about 3% alum.
Claims22
An insulation board for use as a roof insulating board:
- the insulation board having a density between about 8 and about 15 pounds per cubic foot and a MOR/density ratio of at least 10.5 to 1;
- the insulation board having a major surface adapted to be an upper major surface over which built-up roofing is to be applied;
- the insulation board comprising the following ingredients:
- expanded perlite between about 45% and about 76% by dry weight;
- cellulosic fibers between about 15% and about 45% by dry weight;
- latex binder about 0.1% to about 10% by dry weight;
- bituminous material about 2% to about 9% by dry weight;
- and
- alum about 0% to about 3% by dry weight;
- and
- a coating on the major surface of the insulation board that is essentially coextensive with the major surface of the insulation board;
- and the coating being formed from a coating composition comprising by weight (wet):
- ______________________________________ Water 88.8%-95.8% Asphalt Emulsion 1.5%-2.5% Vermiculite 2.0%-9.0% Carbon Black 1.0%-2.0%. ______________________________________
An insulation board for use as a roof insulating board:
- the insulation board having a density between about 8 and about 15 pounds per cubic foot and a MOR/density ratio of at least 10.5 to 1;
- the insulation board having a major surface adapted to be an upper major surface over which built-up roofing is to be applied;
- the insulation board comprising the following ingredients:
- expanded perlite between about 45% and about 76% by dry weight;
- cellulosic fibers between about 15% and about 45% by dry weight;
- latex binder about 0.1% to about 10% by dry weight;
- bituminous material about 2% to about 9% by dry weight;
- and
- alum about 0% to about 3% by dry weight;
- and
- a coating on the major surface of the insulation board that is essentially coextensive with the major surface of the insulation board;
- and the coating being formed from a coating composition comprising by weight (wet):
- ______________________________________ Water 36.0%-40.0% Bentonite Clay 4.8%-5.3% Asphalt Emulsion 53.8%-56.0% Thickener 0.5%-1.0% Sodium Silicate 0.0%-5.0%. ______________________________________
Dependencies are inferred from the claim text.