Huntsman International LLC

Huntsman Petrochemical Corporation

Kristof Dedecker

Sachchida Nand Singh

Sheila Dubs

Paul Coleman

Jan Marc Vandenbroeck

Thomas Julien Joncheray

Gilles Jean Geumez

Luca Binaghi

Mauro Corio

Linda Carillo

Polyisocyanurate (PIR) and/or polyurethane (PUR) comprising insulation foams having significantly improved long term insulation values are disclosed as well as a processing method to fabricate said improved insulation foams and use of the improved insulation foams for thermal insulation.

Long term improvement of thermal insulation values in rigid polyisocyanurate/polyurethane comprising insulation foams

Polyurethane/polyisocyanurate foam insulation described herein is derived from a composition that contains an organic polyisocyanate, an isocyanate reactive material containing at least about 20% by weight, based on the total weight of the composition, of an aromatic polyester polyol, a hydrocarbon blowing agent, a first catalyst selected from the group consisting of a carboxylate salt of an alkali metal, a carboxylate salt of an alkaline earth metal, a carboxylate salt of a quaternary ammonium, and combinations thereof, and a second catalyst comprising a non-reactive tertiary amine, wherein a molar ratio of the first catalyst to the second catalyst is less than about 1.25, the composition gels quickly, and the composition has an isocyanate index greater than about 175. Such an insulating foam has a ratio of thermal conductivity at 75&#xb0; F. to thermal conductivity at 25&#xb0; F. between about 0.98 and about 1.10.

Hydrocarbon blown polyurethane foam formulation giving desirable thermal insulation properties

Process for preparing rigid polyurethane or urethane-modified polyisocyanurate foams from polyisocyanates and polyfunctional isocyanate-reactive compounds in the presence of blowing agents wherein the polyfunctional isocyanate-reactive compounds comprise a polyether polyol having a hydroxyl number of between 50 and 650 mg KOH/g obtained by reacting a polyfunctional initiator first with ethylene oxide and subsequently with propylene oxide wherein the propoxylation degree is between 0.33 and 2 mole propylene oxide per active hydrogen atom in the initiator and wherein the molar ratio of ethylene oxide to propylene oxide in said polyether polyol is at least 2.

Process for making rigid polyurethane or urethane-modified polyisocyanurate foams

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Leefdaal, Belgium

Kristof Dedecker