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US 2004/0087674 A1Published application
Insulation boards and methods for their manufacture
AssigneeBFS Diversified Products, LLC
InventorJohn B. Letts
Life of this patent
Estimating the term…
Abstract
A method for producing polyisocyanurate insulation foams, the method comprising contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane.
Claims15
A method for producing polyisocyanurate insulation foams, the method comprising:
- contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane.
A method for producing polyisocyanurate insulation foams, the method comprising:
- contacting an isocyanate-reactive compound with an isocyanate compound in the presence of a blowing agent that includes both isopentane and n-pentane in the substantial absence of cyclopentane, where the isopentane is present in a weight fraction that is greater than the weight fraction of the n-pentane.
A method for producing polyisocyanurate insulation foams, the method comprising:
- contacting an A-side stream of reactants that includes an isocyanate with a B-side stream of reactants that include a polyol and a blowing agent, where the blowing agent includes isopentane and n-pentane in a substantial absence of cyclopentane, where the weight ratio of the isopentane to the n-pentane if from 7:1 to 1:1.
Dependencies are inferred from the claim text.