Use of complex polyester amines and polyester quaternary ammonium compounds as corrosion inhibitors for metal surfaces, and a method for protecting a metal surface from corrosion by contacting the metal surface with said corrosion inhibitor.

The present invention relates to polyester polyols comprising units derived from a) at least one COOH group or derivative thereof carrying component or mixture of components (A) comprising at least one compound carrying two COOH groups or derivatives thereof (A1), b) at least one OH group carrying component or mixture of components (B) comprising (i) at least one compound carrying three OH groups selected from the group consisting of 1,3,5-tris(hydroxymethyl)isocyanurate, 1,3,5-tris(2-hydroxyethyl) isocyanurate, 1,3,5-tris(2-hydroxyisopropyl)isocyanurate, 1,3,5-tris(2-hydroxypropyl)isocyanurate and 1,3,5-tris(2-hydroxybutyl)isocyanurate (B1), (ii) at least one compound carrying two OH groups selected from the group consisting of 1,1-bis(hydroxymethyl)-cyclohexane, 1,2-bis(hydroxymethyl)-cyclohexane, 1,3-bis(hydroxymethyl)-cyclohexane, 1,4-bis(hydroxymethyl)-cyclohexane, 1,1-bis(hydroxyethyl)-cyclohexane, 1,2-bis(hydroxyethyl)-cyclohexane, 1,3-bis(hydroxyethyl)-cyclohexane and 1,4-bis(hydroxyethyl)cyclohexane (B2), (iii) optionally at least one compound or polymer carrying at least three OH groups, which is different from B1 (B3), and (iv) optionally at least one compound or polymer carrying two OH groups, which is different from B2 (B4), and c) optionally at least one compound carrying at least one OH group and at least one COOH group or a derivative thereof (C), and to organic-solvent based two-component coating compositions comprising a) a first component (K1) comprising (i) at least one polyester polyol of the present invention and (ii) optionally at least one polymer carrying more than one OH group, which is different from the polyester polyol of the present invention (D), and b) a second component (K2) comprising (i) at least one compound, oligomer or polymer carrying more than one N═C═O group or blocked N═C═O group (F).

Linear, comb, and star shaped non-ionic polyesters and copolyesters, polyesteramides, polyamides, and copolyamides may be synthesized from the condensation polymerization of polyacids containing alpha-hydroxy polyacids and diols and/or polyols, and amino-diols and/or amines using boric acid, boric anhydride, and boronic acids as catalysts. Depending on the polyol, polyamine, and amino alcohol component, the resulting compound may be hydrophilic or hydrophobic, but not water soluble or dispersible, enabling use in packaging films, fibers, and other molded articles. The compounds may be completely water soluble, water dispersible, and/or amphipathic, thus being useful in cosmetics, agricultural compositions, biomedical and pharmaceutical applications.

Provided herein are bioactivated polymer/extracellular matrix (ECM) composites and methods of preparation and use thereof. In particular, heparinized cysteine-polymer/ECM composites, and methods of preparation and use thereof, are provided. In some embodiments, provided herein are compositions comprising a composite of: (a) extracellular matrix (ECM), and (b) a polyester covalently linked to a bioactive agent. In some embodiments, the composite is a homogeneous composite. In some embodiments, the ECM is decellularized ECM. In some embodiments, the ECM is not substantially crosslinked.

In one aspect, block copolymers are described herein. A block copolymer described herein, in some embodiments, comprises a first block comprising a polymer or oligomer formed from the reaction product of (i) a polycarboxylic acid or a polycarboxylic acid equivalent, (ii) a polyol, and (iii) an amino acid; and a second block comprising a polymer or oligomer that differs from the polymer or oligomer of the first block. In some cases, the polycarboxylic acid or polycarboxylic acid equivalent comprises citric acid, a citrate, or an ester of citric acid. The polyol can comprise an α,ω-n-alkane diol, poly(ethylene glycol), or poly(propylene glycol). In some embodiments, the amino acid forms a pendant group of the polymer or oligomer of the first block and/or forms a luminescent 6-membered ring with the polycarboxylic acid or polycarboxylic acid equivalent. The second block of a block copolymer described herein, in some embodiments, comprises a polylactone.

A pH-modulating poly(glycerol sebacate) composition includes poly(glycerol sebacate) and at least one pH-modulating agent associated with the poly(glycerol sebacate). A process of making a pH-modulating poly(glycerol sebacate) composition includes forming a poly(glycerol sebacate) by a water-mediated reaction from glycerol and sebacic acid and associating at least one pH-modulating agent with the poly(glycerol sebacate). A process of modulating a pH of a buffered aqueous solution includes placing a pH-modulating poly(glycerol sebacate) composition in a buffered aqueous solution. The pH-modulating agent is released into the buffered aqueous solution during degradation of the poly(glycerol sebacate) to reduce a decrease in pH of the buffered aqueous solution caused by degradation of the poly(glycerol sebacate).

Resin particles each include a binder resin. The binder resin includes an amorphous polyester resin and a crystalline resin. The amorphous polyester resin includes alcohol monomers as one of constituent components. The alcohol monomers include propylene glycol. Abundance of the crystalline resin in a region from an outermost surface of each of the resin particles to a depth of 150 nm from the outermost surface is 4% or less relative to an amount of the crystalline resin in an entire region of each of the resin particles. A radiocarbon .sup.14C content of the resin particles is 5.4 pMC or greater.

A curing agent composition and a curing agent coating formula thereof are provided. The curing agent composition includes 5 to 25 wt % of an ester group-containing amine end group adduct, 2 to 25 wt % of a C8-C22 hydrophobic saturated or unsaturated fatty amine, 2 to 25 wt % of a polyamine compound, 2 to 20 wt % of a silane compound, and 10 to 60 wt % of an ether solvent.

A compound comprising an oligomer formed from a biocompatible multifunctional carboxylic acid comprising a hydroxyl group and at least one carboxylic acid, an polyol (e.g., an aliphatic diol), and a linker. One or more conductive oligomers (e.g., polyanilines) are covalently bonded to the oligomer. The compounds can have various forms (e.g., articles of manufacture, films, scaffolds, and the like). The compounds have various uses. For example, the compounds are used in photoacoustic imaging methods.

A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.