US 11,787,895 B2
Sprayable marine foam
Anthony J. Taylor, Medina, OH (US); and Andrew P. Shinko, Uniontown, OH (US)
Assigned to ICP CONSTRUCTION, INC., Andover, MA (US)
Filed by ICP CONSTRUCTION, INC., Andover, MA (US)
Filed on Oct. 12, 2020, as Appl. No. 17/67,886.
Claims priority of provisional application 62/915,084, filed on Oct. 15, 2019.
Prior Publication US 2021/0108022 A1, Apr. 15, 2021
Int. Cl. C08G 18/64 (2006.01); C08G 18/08 (2006.01); C08G 18/48 (2006.01); C08J 9/14 (2006.01)
CPC C08G 18/64 (2013.01) [C08G 18/14 (2013.01); C08G 18/4804 (2013.01); C08J 9/146 (2013.01); C08J 2203/142 (2013.01); C08J 2375/06 (2013.01); C08J 2375/08 (2013.01)] 8 Claims
 
1. A two component polyurethane or polyisocyanurate foam blown by at least one hydrofluoroolefin blowing agent, the two component foam synthesized from two sets of pressurized reactant components which comprise an A-side and a B-side:
the B-side reactant components comprising a polyol blend:
25-50 wt. % of at least one polyether polyol in the polyol blend present in a major amount;
10-40 wt. % of at least one phthalic anhydride based aromatic polyester polyol present in a minor amount in the polyol blend;
30-65 wt. % of at least two additives comprising at least one plasticizer and at least one flame retardant;
1-5 wt. % of at least one surfactant;
1-5 wt. % of at least one catalyst;
0.5-3 wt. % of water;
the at least one hydrofluoroolefin blowing agent having a boiling point at atmospheric pressure of between ˜ −45° C. to ˜ 0° C. inclusive and miscible blends thereof, and
the weight percentages of all of the B-side reactant components combining to total 100%,
the A-side reactive components comprising:
a poly- or diisocyanate; and
the at least one hydrofluoroolefin blowing agent having a boiling point at atmospheric pressure of between ˜ −45° C. to ˜ 0° C. inclusive and miscible blends thereof, and
wherein the foam passes all United States Coast Guard Title 33, Part 183 specifications wherein the buoyant force of the foam is not reduced more than 5% after exposure to all of the conditions identified in the United States Coast Guard Title 33, Part 183 specifications.