Polyurethane encapsulating compounds for the embedding of hollow fibers of filter elements are provided. These are obtainable by mixing a polyol component (A) and an isocyanate component (B) to give a reaction mixture and reacting the mixture to completion to give the polyurethane encapsulating compound, wherein the polyol component (A) comprises (a1) at least one fatty-acid-based polyol, (a2) at least one amine compound having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom and (a3) at least one metal compound that functions as a polyurethane catalyst, wherein the polyurethane catalyst (a3) does not comprise any tin, lead and/or mercury and the isocyanate component (B) comprises at least one aromatic isocyanate having at least two isocyanate groups. Further provided is a method for producing filter elements using the polyurethane encapsulating compounds and the use of the polyurethane encapsulating compounds for the embedding of hollow fibers.

Provided is a liquid crystal display element that can be baked at a low temperature when forming a liquid crystal alignment film capable of imparting an alignment regulating property and a pretilt angle developing property via a photoalignment method. Further provided is a liquid crystal display element in which the liquid crystal pretilt angles are highly stable, and display burn-in hardly occurs even due to long usage. Further provided are a vertical liquid crystal alignment film to be used in the liquid crystal display element, and a liquid crystal aligning agent with which it is possible to provide the vertical liquid crystal alignment film. A liquid crystal aligning agent of the present invention contains: component (A), which is a polymer including (A-1) a site having an isocyanate group and/or a blocked isocyanate group and (A-2) a site having photoreactivity; component (B), which is a compound having, in a molecule, at least two functional groups of at least one type selected from the group consisting of an amino group and a hydroxyl group; and an organic solvent.

The present invention relates to a composition comprising: anNCO component comprising: A) at least one polyurethane comprising at least two NCO end groups obtained by polyaddition reaction: of a composition comprising at least one diisocyanate, of a composition comprising at least one polyol, B) at least one polyisocyanate comprising at least three isocyanate NCO functions, selected from the group consisting of biurets, of isocyanurates, of adducts of diisocyanates and triols, and of mixtures thereof; an OH component comprising: at least two polyols P1 having a number-average molecular weight of strictly less than 500 g/mol and at least one polyol P2 having a number-average molecular weight of strictly greater than 1000 g/mol, said composition comprising at least one rheology agent.

Pultrusion processes for producing fiber reinforced polyurethane composites are described. The processes utilize a polyurethane-forming reaction mixture comprises a chelated organometallic/metalorganic catalyst. Polyurethane-forming reaction mixtures suitable for use in such processes are also described.

A thermoplastic elastomer foam is made by incorporating a gaseous or supercritical blowing agent under pressure into a molten thermoplastic elastomer comprising polymeric crystalline domains, then releasing the pressure to foam the thermoplastic elastomer.

Provided are an adhesive including a polyisocyanate composition (X) containing a polyisocyanate (A), and a polyol composition (Y) containing a tertiary amine compound (B) having plural hydroxyl groups, a polyol (C), and an aliphatic cyclic amide compound (D), as essential components, a laminated film using the adhesive, and a method for producing a laminated film including a step of separately applying two components, which includes bringing a polyisocyanate composition (X) containing a polyisocyanate (A) that is applied onto one base material into contact with a polyol composition (Y) containing a tertiary amine compound (B) having plural hydroxyl groups, a polyol (C), and an aliphatic cyclic amide compound (D) that is applied onto the other base material, and performing pressure-bonding.

Provided are an adhesive including a polyisocyanate composition (X) containing a polyisocyanate (A), and a polyol composition (Y) containing a tertiary amine compound (B) having plural hydroxyl groups, a polyol (C), and an aliphatic cyclic amide compound (D), as essential components, a laminated film using the adhesive, and a method for producing a laminated film including a step of separately applying two components, which includes bringing a polyisocyanate composition (X) containing a polyisocyanate (A) that is applied onto one base material into contact with a polyol composition (Y) containing a tertiary amine compound (B) having plural hydroxyl groups, a polyol (C), and an aliphatic cyclic amide compound (D) that is applied onto the other base material, and performing pressure-bonding.

Polymeric based closed cell foams, such as shape memory polymer foams, contain bubbles. Making these bubbles continuous is called reticulation. Disclosed are embodiments of a device and method to controllably reticulate polymer-based closed cell foams by puncturing the membranes of these polymer-based closed cell foams.

Disclosed is a polyol composition comprising: (a) at least one monomeric polyol comprising three or more hydroxyl groups; (b) at least one higher polyol comprising three or more hydroxyl groups; and (c) at least one polyhydroxylated aromatic compound; wherein the at least one higher polyol comprises residues of either or both of the at least one monomeric polyol and the polyhydroxylated aromatic compound linked by one or more carbonate groups, oxygen ether groups, or a combination thereof, and wherein the polyol composition has a viscosity of less than 5000 cps at 150 degrees Fahrenheit. The at least one monomeric polyol and at least one higher polyol may have any structures affording polyol compositions and polyurethane compositions having the requisite physical characteristics in terms of polyol composition viscosity and polyurethane heat resistance, strength and flexural modulus. The polyol compositions are adapted to provide structurally robust, temperature resistant polyurethanes, but are of sufficiently low viscosity to permit the use of currently available pumping and mixing equipment. The resultant polyurethane compositions may exhibit heat distortion temperatures in excess of 110 degrees centigrade, high strength and essentially no loss of material properties in prolonged humidity tests at 70 degrees centigrade, lower peak exotherms, typically less than 250 degrees Fahrenheit during in-mold curing/polymerization. Articles prepared from polyurethanes incorporating such polyol compositions as reactants exhibit flexural strengths in excess of 10,000 psi and flexural moduli in excess of 400,000 psi, and exhibit outstanding green strength.

The invention relates to a polyurethane bone-tendon graft biomaterial and method of making the bone-tendon graft biomaterial. The biomaterial has a gradient of mechanical properties through photocrosslinking such that a first end of the biomaterial is crosslinked at a higher degree than a second end, and the first end of the biomaterial has mechanical properties of bone and the second end of the biomaterial has mechanical properties of tendon.