Isocyanate-reactive compositions that include a hydrofluoroolefin blowing agent, polyurethane foam-forming compositions, as well as spray-applied polyurethane foams formed therefrom that can provide structural support to wall structures and can also exhibit ASTM E84-16 Class A flame spread and smoke development characteristics at a foam thickness of 4 inches.

The present invention relates to a method for producing foam and foam produced thereby. The method for producing foam includes a step for producing foam by kneading and injection molding a first extrusion product and a second extrusion product, wherein the first extrusion product is obtained by extruding a first composition including an aromatic vinyl-based resin, and the second extrusion product is obtained by extruding a second composition including a polyamide resin and a foaming agent.

The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a precipitation-resistant metal-based catalyst used alone or in combination with an amine catalyst.

The invention provides polyurethane and polyisocyanurate foams and methods for the preparation thereof. More particularly, the invention relates to closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, and a precipitation-resistant metal-based catalyst used alone or in combination with an amine catalyst.

Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing, sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing, sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

HCFO-containing isocyanate-reactive compositions, foam-forming compositions containing such isocyanate-reactive compositions, rigid PUR-PIR foams made using such foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in discontinuous foam panel applications. The isocyanate-reactive composition includes a polyol blend, a blowing agent composition, and a tertiary amine catalyst. The polyol blend includes: (1) an aromatic polyester polyol having a functionality of 1.5 to less than 2.5 and an OH number of 150 to 360 mg KOH/g; (2) an aromatic polyester polyol having a functionality of at least 2.5 and an OH number greater than 360 mg KOH/g, which is present in an amount of at least 10% by weight, based on the total weight of the aromatic polyester polyol in the polyol blend; and (3) an amine-initiated polyether polyol having an OH number of at least 500 mg KOH/g and a functionality of 2.5 to 4. The blowing agent composition includes a hydrochlorofluoroolefin and a carbon dioxide generating chemical blowing agent.

A process includes calcining a high potassium carbonaceous waste product to form potassium oxide and carbon dioxide and reacting the potassium oxide and carbon dioxide to yield bio-based potassium carbonate. The process also includes catalyzing a reaction of a lignocellulosic biomass with abundant hydroxyl groups into a biopolyol using the bio-based potassium carbonate and brominating using a brominating agent a triglyceride to form a bio-isocyanate. In addition, the process includes reacting the biopolyol and the bio-isocyanate to form a polyurethane foam.

A process includes calcining a high potassium carbonaceous waste product to form potassium oxide and carbon dioxide and reacting the potassium oxide and carbon dioxide to yield bio-based potassium carbonate. The process also includes catalyzing a reaction of a lignocellulosic biomass with abundant hydroxyl groups into a biopolyol using the bio-based potassium carbonate and brominating using a brominating agent a triglyceride to form a bio-isocyanate. In addition, the process includes reacting the biopolyol and the bio-isocyanate to form a polyurethane foam.

Described is an at least partly continuous process for making polyurethane foam layers that are suitable for medical applications, in particular in wound dressings, at a high throughput rate. The described process includes a step of accelerated curing of the polyurethane foam performed at a stage of the overall curing process at which the risk of a run-away reaction is minimized.