Polyurethane foams that are hydrophilic but nonetheless have low compression sets are made from a combination of MDI and TDI prepolymers, water, and a polymer polyol. The foams optionally are made incorporating a phase change material in the foam formulation. The phase change material does not require encapsulation.

A two-component polyurethane compositions including (i) a polyol component A comprising a tri- or higher functional polyol P1 having an OH equivalent weight of from 60 g/mol to 250 g/mol and a di- or tri-functional polyether or polyester polyol P2 which is different from the polyol P1; and (ii) an isocyanate component B comprising at least one polyisocyanate I. Polyurethane compositions have surprisingly been found to be suitable for 3D printing processing, where they provide printed 3D objects with reduced tackiness even shortly after the printing. In addition, the invention provides processes for the production of three dimension objects form such compositions as well as three dimensional objects prepared accordingly and the use of corresponding compositions in 3D printing processes.

A solvent-based polyurethane retort adhesive system for producing laminates including: (A) at least one isocyanate compound, Component A, comprising: a blend of: (i) at least one aliphatic-based isocyanate and (ii) at least one aromatic-based isocyanate; and (B) at least one isocyanate-reactive component, Component B, comprising: (i) at least one phosphate ester compound and (ii) at least one polyether polyol having an average molecular weight of less than 1,500 g/mol; a process for producing the above adhesive; a multi-layer laminate product including the above adhesive; and a process for producing a laminate product using the above adhesive.

Polyurethane foams are made by curing a reaction mixture that contains an aromatic polyisocyanate, at least one isocyanate-reactive material having an average functionality of at least 2 and an equivalent weight of at least 200 per isocyanate-reactive group, at least one blowing agent, at least one surfactant and at least one catalyst, and a certain 3-oxopropanamide compound. Foams so produced emit low levels of aldehydes.

A solvent-based polyurethane retort adhesive composition for producing laminates including: (A) at least one isocyanate compound, Component A; and (B) at least one isocyanate (NCO)-reactive component, Component B, comprising (i) at least one phosphate ester compound and (ii) at least one polyester polyol having an average molecular weight of greater than 3,000 g/mol; a process for producing the above adhesive; a multi-layer laminate product including the above adhesive; and a process for producing a laminate product using the above adhesive.

The present invention relates to a molding made of reactive foam, wherein at least one fiber (F) is arranged partially inside the molding, i.e. is surrounded by the reactive foam. The two ends of the respective fiber (F) not surrounded by the reactive foam thus each project from one side of the corresponding molding. The reactive foam is produced by a mold foaming process. The present invention further provides a panel comprising at least one such molding and at least one further layer (S1). The present invention further provides processes for producing the moldings according to the invention from reactive foam/the panels according to the invention and also provides for the use thereof as a rotor blade in wind turbines for example.

The invention pertains generally to a shelf-stable polyurethane HFO-blown two-component polyurethane foam composition which includes controlling the ratio of tin-containing catalyst(s) to potassium-containing catalyst(s).

A reaction system for forming a viscoelastic polyurethane foam includes an isocyanate component and an isocyanate-reactive component that includes at least a polyol component, an additive component, and a preformed aqueous polymer dispersant. The mixture includes 50.0 wt % to 99.8 wt % of the polyol component, 0.1 wt % to 49.9 wt % of the additive component, and 0.1 wt % to 6.0 wt % of the preformed aqueous polymer dispersant. The aqueous polymer dispersant has a pH from 6.0 to 12.0 and includes from 5 wt % to 60 wt % of a polymeric component and from 40 wt % to 95 wt % of a fluid medium. The polymeric component includes at least one base polymer derived from 20 wt % to 100 wt % of at least one hydrophilic acid monomer having at least one carbonyl group, phosphate group, phosphonate group, or sulfonyl group, and optionally derived from at least one hydrophobic terminally unsaturated hydrocarbon monomer.

Very soft, launderable polyurethane foams for pillow and other bedding applications are made using a quasi-prepolymer of diphenylmethane diisocyanate and a polyether polyol having a high oxyethylene content. The quasi-prepolymer is reacted with isocyanate-reactive components that include a certain monoalcohol but is devoid of or nearly devoid of a polyether polyol having a high oxyethylene content.

A two-part curable urethane-based composition comprising a main agent (A); and a curing agent (B), wherein the main agent (A) contains a urethane prepolymer (a), an isocyanurate modified product of a polyisocyanate compound (b), and a silane coupling agent (c) in a specified ratio, the curing agent (B) contains a polyol (d) having a hydroxyl value of 50 to 500 mgKOH/g and an amine catalyst (e) in a specified amount, a mixing mass ratio of the main agent (A) to the curing agent (B) is 3:1 to 10:1, and an equivalent ratio of NCO group/OH group in the main agent (A) and the curing agent (B), respectively, is 1.0 to 5.0.