HYDROFLUORO OLEFIN PROPELLANT IN A POLYURETHANE FOAM COMPOSITION

1 . A B-side component of a two component low pressure polyurethane foam, the B-side component comprising:

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,

wherein 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.

2 . The B-side component of claim 1 , wherein the one or more polyether polyols are at least 35% by weight of the B-side.

3 . The B-side component of claim 1 , wherein the one or more polyether polyols comprise at least one oxypropylated triol and at least one propylene oxide diol.

4 . The B-side component of claim 1 , wherein the fluoride ion scavenger comprises glycerin ranging from approximately 1.0 to 8.0% by weight of the B-side.

5 . The B-side component of claim 1 , wherein the at least one flame retardant and/or plasticizer comprises a phosphate-ester flame retardant plasticizer.

6 . The B-side component of claim 5 , wherein the phosphate-ester flame retardant plasticizer comprises tris(1-chloro-2-propyl) phosphate.

7 . The B-side component of claim 1 , wherein the amine catalyst is a tertiary amine catalyst, and wherein the catalyst package further comprises an organotin catalyst.

8 . The B-side component of claim 1 , wherein a catalytic decay ratio (gel) is less than 1.5 and a catalytic decay ratio (tack-free) is less than 1.5 after storage of the B-side component for at least six months.

9 . The B-side component of claim 8 , wherein the catalytic decay ratio (gel) is less than 1.5 and the catalytic decay ratio (tack-free) is less than 1.5 after storage of the B-side component for at least twelve months.

10 . The B-side component of claim 1 , wherein water in the amount of less than 1% by weight of the B-side prior to inclusion of the HFO propellant at the B-side is 0% by weight of the B-side.

11 . The B-side component of claim 1 , further comprising:

an aliphatic diol chain extender having a molecular weight ranging from approximately 90 to 1,500 g/mol and in an amount ranging from approximately 1.0 to 15.0% by weight of the B-side.

12 . The B-side component of claim 1 , further comprising:

an inert pressurant that is selected from the group consisting of nitrogen and carbon dioxide.

13 . A B-side component of a two component low pressure polyurethane foam, the B-side component comprising:

an HFO propellant consisting of 1,3,3,3-tetrafluoropropene and no other HFO propellant glycerin as a fluoride-ion scavenger;

one or more polyether polyols and no polyester polyols;

at least one silicone polyether surfactant;

at least one flame retardant and/or plasticizer; and

a catalyst package comprising an amine catalyst,

wherein the B-side component exhibits a catalytic decay ratio (gel) of less than 1.5 and a catalytic decay ratio (tack-free) of less than 1.5 after storage of the B-side component for at least twelve months, and

wherein water is an amount of less than 1% by weight of the B-side prior to inclusion of the HFO propellant at the B-side.

14 . The B-side component of claim 13 , wherein water in the amount of less than 1% by weight of the B-side prior to inclusion of the HFO propellant at the B-side is 0% by weight of the B-side prior to inclusion of the HFO propellant at the B-side.

15 . The B-side component of claim 13 , wherein the at least one flame retardant and/or plasticizer comprises a phosphate-ester flame retardant plasticizer.

16 . The B-side component of claim 13 , wherein the catalyst package is free of any organotin catalyst.

17 . A two-component low-pressure polyurethane foam kit, the kit comprising:

an A-side component comprising at least one diisocyanate; and

a B-side component comprising:

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 at one or both of the A-side component and the B-side component,

wherein the kit is configured for low pressure dispensing.

18 . The kit of claim 17 , wherein the catalyst package at the B-side component further comprises an organotin catalyst.

19 . The kit of claim 17 , wherein the A-side component comprises a first pressurized cylinder and the B-side component comprises a second, different pressurized cylinder, wherein the first pressurized cylinder has an internal canister pressure of 250 psi or less to configure the first pressurized cylinder for low pressure dispensing, and wherein the second pressurized cylinder has an internal canister pressure of 250 psi or less to configure the second pressurized cylinder for low pressure dispensing.

20 . The kit of claim 17 , wherein a catalytic decay ratio (gel) is less than 1.5 and a catalytic decay ratio (tack-free) is less than 1.5 after storage of the B-side component for at least six months.