A process and composition is described for the inclusion of polyether polyols in concentrations greater than 10% loading on the B-side formulation with a catalyst package less than 1% loading on the B-side formulation. In one specific example, the use of glycerin as a fluorine ion scavenger is utilized to improve performance of the polyurethane systems through a twelve-month shelf life.

An aerosol can configuration includes an outer can, an inner container and a spray head with a discharge element. The spray head has an outlet valve connected to the interior of the outer can and an outlet valve connected to the interior of the inner container. The two outlet valves are opened jointly by pressing on the spray head, so that the contents of the outer can and the contents of the inner container jointly enter the discharge element. To form a foam, the outer can contains at least 30-70% by weight isocyanate, in particular diphenylmethane 4,4-diisocyanate, 3-15% by weight polyol with an OH number of less than 300, and 5-30% by weight liquid gas at a critical temperature of +70 C. At least 5-30% by weight polyol with an OH number of more than 300, and 1-10% by weight liquid gas with a critical temperature of +70 C. are contained in the inner container.

The present disclosure provides a method to produce a froth polyurethane foam using storage stable components. The method comprises preparing an A component, which comprises an isocyanate; preparing a B component, which comprises an isocyanate-reactive compound, and generating a foam by mixing the A component and the B component at a low pressure; wherein the A component or the B component or both further comprise a blowing agent comprising E-1,1,1,4,4,4-hexafluoro-2-butene (E-HFO-1336mzz) and one or more of a co-blowing agent chosen from carbon dioxide, nitrogen, or 1,1-difluoroethane (HFC-152a).

A B-side component of a two component low pressure polyurethane foam, the B-side component includes: a fluoride ion scavenger; one or more polyols consisting of all polyether polyols and, if the fluoride ion scavenger is a polyol, the fluoride ion scavenger, and no polyester polyols; at least one silicone polyether surfactant; at least one flame retardant and/or plasticizer; a catalyst package comprising an amine catalyst; and an HFO propellant consisting of 1,3,3,3-tetrafluoropropene and no other HFO propellant. Water is in an amount of less than 1% by weight of the B-side prior to inclusion of the HFO propellant at the B-side.