Disclosed herein is a polyurethane foam sponge produced by the steps of a) providing an hydrophobic polyol which has six hydroxyl groups, b) providing a hydrophilic diisocyanate obtained by reacting a diisocyanate with a hydrophilic polyether diol, c) reacting the hydrophobic polyol with the hydrophilic diisocyanate to obtain a prepolymer which includes 3 to 6 isocyanate groups, and d) mixing the prepolymer with a hydrophilic polyether polyol, a blowing agent, an end-capping agent, a reinforcing agent, and a catalyst to obtain the polyurethane foam sponge. A wound dressing including the polyurethane foam sponge is also disclosed.

A waterborne poly(alkynyl carbamate) prepolymer is provided which comprises a reaction product of a polyisocyanate comprising a first portion and a second portion of isocyanate groups; an isocyanate-reactive component comprising 0.1 mol % to 6 mol % of a C.sub.10-C.sub.50 glycol ether; and 99.9 mol % to 94 mol % of an alkynol, wherein the mol % is based on the moles of isocyanate in the polyisocyanate, wherein the first portion of isocyanate groups reacts with the C.sub.10-C.sub.50 glycol ether, wherein the second portion of isocyanate groups reacts with the alkynol, and wherein reaction occurs optionally in the presence of a catalyst. The reaction of long chain glycol ethers with the polyisocyanate at a level of from 0.1 mol % to 6 mol % imparts water dispersibility to the prepolymer, and when the prepolymer is dispersed in water, the performance of waterborne alternative polyurethane compositions made therefrom, such as coatings, adhesives, sealants, films, elastomers, castings, foams, and composites, are not compromised. The invention allows for the use of water as a carrier, thus eliminating the need for organic solvents.

The present invention relates to a process for producing perfume- or flavor-containing polyurea microcapsules with improved deposition of encapsulated actives on targeted surfaces such as fiber, hair and skin, which can be used in home or personal care products, as well as to microcapsules obtainable by such a process and consumer products comprising these microcapsules.

Disclosed are a spandex fiber with a reversible triple-shape memory effect and a preparation method thereof. In the present disclosure, the spandex fiber includes the following raw materials in parts by weight: 3 parts to 100 parts of a crystalline polyester diol or a crystalline polyether diol, 1 part to 30 parts of a diisocyanate, 0.1 parts to 15 parts of a polyurethane chain extender, and 0.2 parts to 11 parts of a polyurethane cross-linking agent, where the crystalline polyester diol or the crystalline polyether diol has a number-average molecular weight of 1,000-10,000 Daltons. The spandex fiber has a reversible deformation process, shows an ability to transform between “stretched” and “shortened” states infinitely under the action of a temperature field, and can memorize two temporary shapes. Moreover, the spandex fiber has easily accessible raw materials and a simple preparation method, and is suitable for large-scale industrial production.

This disclosure generally provides polyfunctional isocyanate compositions and polyurethane compositions made thereof which has improved impact resistance, wherein the polyfunctional isocyanate composition comprising a polyfunctional isocyanate compound which is a derivative of an ether based diisocyanate; wherein the functionality of the polyfunctional isocyanate compound is 3.

The present disclosure relates to a dispersant having the following structure of Chemical Formula 1, a light emitting film in which the dispersant is adsorbed on a surface of an inorganic luminescent particle, and a light emitting diode and a light emitting device in which the light emitting film is applied into an emitting material layer and/or a color conversion film. The dispersant enables the inorganic luminescent particle to have excellent dispersion property and optical properties, and thus the light emitting diode and the light emitting device can its luminous efficiency and luminous lifetime. ##STR00001##

An article is prepared by injection molding, wherein the article is formed from a hydrophilic thermoplastic polyurethane composition, wherein the thermoplastic polyurethane composition comprises the reaction product of a hydroxyl terminated polyol intermediate component, an aliphatic isocyanate component, and, optionally, a chain extender component. For injection molding, the hydrophilic thermoplastic polyurethane has a crystallization temperature measured by dynamic scanning calorimetry of at least 75° C.

Provided is a polyurethane resin-forming composition for a membrane-sealing material, the polyurethane resin-forming composition contributing to formation of (1) a urethane resin that is excellent in moldability, has a suppressed elution amount of a low-molecular-weight reaction product, and has excellent appearance or (2) a urethane resin that has a low viscosity, is excellent in cast moldability, and has a reduced water elution amount of a low-molecular-weight reaction product and a reduced solvent elution amount of a molded product.

The polyurethane resin-forming composition for a membrane-sealing material comprises: a polyisocyanate prepolymer (A) or an allophanate group-containing polyisocyanate prepolymer (A′) comprising a reaction product of a diphenylmethane diisocyanate (a1-1) and/or a modified product of a diphenylmethane diisocyanate (a1-2), and an active hydrogen-containing compound (a2); and a castor oil polymerized polyol (b1) comprising a castor oil polymerization product.

The present disclosure relates to a graft material including a self-healing polymer layer and to implantable medical devices including such a graft material. The invention also relates to methods of using and manufacturing such graft materials and devices. In one embodiment, the implantable medical device is a stent graft.

A compound having an uretonimine group contains, as a structural unit, a carbodiimide compound derived from at least one of an aliphatic diisocyanate and an aromatic diisocyanate, and also contains an isocyanate compound as a structural unit, wherein the residue obtained by removing an isocyanate group from the isocyanate compound and the residue obtained by removing a carbodiimide group from the carbodiimide compound are different.