The present invention relates to a self-healing polyurethane, a polyol for use in the polyurethane, and to the use of the polyol and/or polyurethane in coatings, elastomers, composites, adhesives and/or sealants. The polyurethane is capable of exhibiting self-healing (for example, intrinsic self-healing) which results in recovery of a proportion of one or more physical parameters. The polyurethane which is capable of self-healing is the reaction product of reactants comprising a polyol, a polyisocyanate; and optionally, a chain extender. The polyol comprises at least one dimer fatty residue; at least one urethane, amide or carbonate group; and at least two hydroxyl end groups.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both of one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250? F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

Provided herein is a pigmented aqueous basecoat material including an aqueous polyurethane-polyurea dispersion (PD) having polyurethane-polyurea particles present in the dispersion, an average particle size (volume average) of 40 to 2000 nm, and a gel fraction of at least 50 wt %. The polyurethane-polyurea particles, in each case in reacted form, include: at least one polyurethane prepolymer containing isocyanate groups and including anionic groups and/or groups which can be converted into anionic groups, and at least one polyamine comprising two primary amino groups and one or two secondary amino groups. The aqueous basecoat material includes a specific solvent composition. Also provided herein is a method of using basecoat materials including the dispersion (PD) and multicoat paint systems produced using the basecoat materials.

In one aspect, compositions are described herein. In some embodiments, a composition described herein comprises the reaction product of (i) citric acid, a citrate, or an ester of citric acid with (ii) a polyol, and (iii) a monomer comprising one or more alkyne moieties and/or azide moieties. The reaction product, in some instances, comprises a polymer. Further, in some cases, a composition described herein comprises a plurality of polymers. In some embodiments, the polymers are selected to be reactive with one another through a click chemistry reaction scheme to form a polymer network. In another aspect, medical implants and medical devices are described herein, the implants and devices comprising a polymer or polymer network described herein.

An adhesive for bonding comprising a blocked isocyanate and organic carbonate, and optionally a phenoxy resin, catalyst, metal acetylacetonate, and a process for using such an adhesive to bond elastomers, such as liquid silicone rubber to substrates, such as polycarbonate in an injection molding process.

There is provided an oligomeric polyol composition having (a) an oligomeric network containing residues of at least one polyhydroxylated aromatic compound and residues of at least one polyol having at least three hydroxyl groups; and (b) a plurality of peripheral groups having one or more pendant hydroxyl groups bound to the oligomeric network by a plurality of linking units. The residues of the polyol may optionally contain one or more oxygen ether groups, one or more amino ether groups, or both one or more oxygen ether groups and one or more amino ether groups. Reaction of the oligomeric polyols with isocyanate monomers affords a new class of polyurethanes having superior heat and water resistance. The new polyurethanes exhibit lower peak exotherms, typically less than 250? F. during in-mold polymerization. Articles prepared from polyurethanes incorporating such oligomeric polyol compositions exhibit flexural strengths and moduli in excess of 10,000 psi and 400,000 psi respectively, and outstanding green strength.

The present invention relates to a process for the preparation of a hydroxy-amino polymer, comprising the steps: a) reacting an H-functional starter compound carrying at least one Zerewitinoff-active H atom with an unsaturated cyclic carboxylic acid anhydride and at least one alkylene oxide compound to give a hydroxyl-group-carrying prepolymer, b) adding a primary amine and/or ammonia to the double bonds of the hydroxyl-group-carrying prepolymer obtained according to step a) to give the hydroxy-amino polymer, wherein the reaction of the H-functional starter compound with the unsaturated cyclic carboxylic acid anhydride and/or the addition of the alkylene oxide compound is carried out using a double metal cyanide catalyst (DMC catalyst). The invention relates additionally to a hydroxy-amino polymer obtainable by the above-mentioned process, wherein the ratio of the amount of alkylene oxide compound to the amount of carboxylic acid anhydride is at least 1.1:1, and further to the use of this hydroxy-amino polymer in the preparation of a polyurethane urea polymer.

Absorbent element for spilled petroleum or its derivatives comprising an oil-absorbent, hydrophobic and oleophilic material, essentially based on polyurethane foam, having a specific weight in the range of 15-30 g/l and delimiting open cells and closed cells, the latter being in a percentage equal to or lower than 10% of the total cells. The invention further relates to an assembly comprising a plurality of such elements and a method for fabricating an oil-absorbent material.

Provided is a curable photochromic coating composition including (a) a polyol component, (b) a poly(anhydride) having at least three cyclic anhydride groups, (c) a secondary crosslinker, and (d) a photochromic material. The polyol component includes (i) a first polyol having two hydroxyl groups and a hydroxyl equivalent weight of at least 15,000 g/mol and (ii) a second polyol different from the first polyol having at least three hydroxyl groups and a hydroxyl equivalent weight of at least 300 g/mol. The secondary crosslinker is selected from a poly(carbodiimide), an oxazoline-functional material, or mixtures thereof. The present invention also provides an optical article prepared from the curable photochromic coating composition.

The present invention relates to a process for producing a hydroxy amino polymer comprising the steps: a) Reaction of an H functional starter compound bearing at least one Zerewitinoff active H atom with an unsaturated, cyclical carboxylic acid anhydride and at least one alkylene oxide compound for obtaining a prepolymer bearing hydroxyl groups, b) Addition of a primary amine and/or of ammonia to the double bond(s) of the prepolymer bearing hydroxyl groups obtained according to step a) for obtaining the hydroxy amino polymer,
wherein the ratio of added amino groups to hydroxyl groups in a hydroxy amino polymer is at least 0.6. Furthermore, the invention relates to a hydroxy amino polymer, which can be achieved according to this process as well as a polyurea/polyurethane system, which contains such a hydroxy amino polymer.