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US 12,540,214 B2Granted
HCFO-containing isocyanate-reactive compositions, related foam-forming compositions and polyurethane foams
AssigneeCovestro LLC
InventorsSteven Schilling, Albert Peterson
Life of this patent
Estimating the term…
Abstract
Disclosed are HCFO-containing isocyanate-reactive compositions, polyurethane foam-forming compositions containing such isocyanate-reactive compositions, rigid polyurethane foams made using such polyurethane foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in the construction of refrigerated storage devices. The isocyanate-reactive composition can exhibit a long shelf life, be shelf-stable, and produce a foam with good thermal insulation properties.
Claims22
An isocyanate-reactive composition comprising:
- (a) a polyol blend comprising, based on the total weight of the polyol blend:
- (1) 20 to 50% by weight of a saccharide initiated polyether polyol having an OH number of 200 to 600 mg KOH/g and a functionality of 4 to 6;
- (2) 40 to 55% by weight of an aromatic polyether polyol having an OH number of 170 to 600 mg KOH/g and a functionality of 3 to 5;
- and
- (3) 10 to 25% by weight of an aromatic polyester polyol having an OH number of 150 to 410 mg KOH/g and a functionality of 1.5 to 3;
- (b) a blowing agent composition comprising:
- (1) a physical blowing agent comprising at least 10% by weight, based on the total weight of the isocyanate-reactive composition, of a hydrochlorofluoroolefin (HCFO);
- and
- (2) a carbon dioxide generating chemical blowing agent;
- and
- (c) a catalyst composition comprising:
- (1) a morpholine;
- (2) an imidazole;
- and
- (3) an organometallic compound,
- wherein the morpholine (c)(1) is present in an amount of 1.5 to 2.5 parts by weight per 1 part by weight of the combination of imidazole (c)(2) and organometallic compound (c)(3) and the imidazole (c)(2) and organometallic compound (c)(3) are present in a weight ratio of 1.5 to 2.5:1.
13 more elements
An isocyanate-reactive composition comprising:
- (a) a polyol blend comprising, based on the total weight of the polyol blend:
- (1) 20 to 50% by weight of a saccharide initiated polyether polyol having an OH number of 200 to 600 mg KOH/g and a functionality of 4 to 6;
- (2) 40 to 55% by weight of an aromatic polyether polyol having an OH number of 170 to 600 mg KOH/g and a functionality of 3 to 5;
- and
- (3) 10 to 25% by weight of an aromatic polyester polyol having an OH number of 150 to 410 mg KOH/g and a functionality of 1.5 to 3;
- (b) a blowing agent composition comprising:
- (1) a physical blowing agent comprising at least 10% by weight, based on the total weight of the isocyanate-reactive composition, of a hydrochlorofluoroolefin;
- and
- (2) a carbon dioxide generating chemical blowing agent;
- and
- (c) a catalyst composition comprising:
- (1) a morpholine;
- (2) an imidazole;
- and
- (3) a catalyst comprising dibutyltin dilaurate, dibutyltin diacetate, stannous octoate, potassium octoate, potassium acetate, potassium lactate, or a combination thereof
- wherein the morpholine (c)(1) is present in an amount of 1.5 to 2.5 parts by weight per 1 part by weight of the combination of catalyst (c)(2) and catalyst (c)(3) and the catalyst (c)(2) and the catalyst (c)(3) are present in a weight ratio of 1.5 to 2.5:1.
13 more elements
Dependencies are inferred from the claim text.