Insulation boards and methods for their manufacture

Details Insulation boards and methods for their manufacture Insulation boards and methods for their manufacture

2003-08-13

2009-11-03

Zemel, Irina S (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S159000, C521S160000, C521S170000, C521S902000

Reexamination Certificate

active

07612120

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.

REFERENCES:
patent: 5387618 (1995-02-01), Smits
patent: 5472990 (1995-12-01), Craig et al.
patent: 5837742 (1998-11-01), Fishback
patent: 6140383 (2000-10-01), Soukup et al.
patent: WO 97/21764 (1997-06-01), None
patent: WO 00/24813 (2000-05-01), None
patent: WO 02/072680 (2002-09-01), None

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