229 results about "Amino esters" patented technology

Poly(β-amino esters) prepared from the conjugate addition of bis(secondary amines) or primary amines to a bis(acrylate ester) are described. Methods of preparing these polymers from commercially available starting materials are also provided. These tertiary amine-containing polymers are preferably biodegradable and biocompatible and may be used in a variety of drug delivery systems. Given the poly(amine) nature of these polymers, they are particularly suited for the delivery of polynucleotides. Nanoparticles containing polymer/polynucleotide complexes have been prepared. The inventive polymers may also be used to encapsulate other agents to be delivered. They are particularly useful in delivering labile agents given their ability to buffer the pH of their surroundings. A system for preparing and screening polymers in parallel using semi-automated robotic fluid delivery systems is also provided.

Integrated processes of preparing industrial chemicals starting from seed oil feedstock compositions containing one or more unsaturated fatty acids or unsaturated fatty acid esters, which are essentially free of metathesis catalyst poisons, particularly hydroperoxides; metathesis of the feedstock composition with a lower olefin, such as ethylene, to form a reduced chain olefin, preferably, a reduced chain α-olefin, and a reduced chain unsaturated acid or ester, preferably, a reduced chain α,Ω-unsaturated acid or ester. The reduced chain unsaturated acid or ester may be (trans)esterified to form a polyester polyolefin, which may be epoxidized to form a polyester polyepoxide. The reduced chain unsaturated acid or ester may be hydroformylated with reduction to produce an α,Ω-hydroxy acid or α,Ω-hydroxy ester, which may be (trans)esterified with a polyol to form an α,Ωpolyester polyol. Alternatively, the reduced chain unsaturated acid or ester may be hydroformylated with reductive amination to produce an α,Ω-amino acid or α,Ω-amino ester, which may be (trans)esterified to form an α,Ωpolyester polyamine.

Acrylate-terminated poly(beta-amino esters) are cross-linked to form materials useful in the medical as well as non-medical field. The polymeric starting material is combined with a free radical initiator, either a thermal initiator or a photoinitiator, and the mixture for cross-linking is heated or exposed to light depending on the initiator used. The resulting materials due to the hydrolysable ester bond in the polymer backbone are biodegradable under physiological conditions. These cross-linked materials are particular useful as drug delivery vehicles, tissue engineering scaffolds, and in fabricating microdevices. The materials may also be used as plastics, coating, adhesives, inks, etc. The cross-linked materials prepared exhibit a wide range of degradation times, mass loss profiles, and mechanical properties. Therefore, the properties of the material may be tuned for the desired use. The high-throughput approach to preparing a library of cross-linked poly(beta-amino esters) allows for the rapid screening and design of degradable polymers for a variety of applications.

Poly(β-amino esters) prepared from the conjugate addition of bis(secondary amines) or primary amines to a bis(acrylate ester) are described. Methods of preparing these polymers from commercially available starting materials are also provided. These tertiary amine-containing polymers are preferably biodegradable and biocompatible and may be used in a variety of drug delivery systems. Given the poly(amine) nature of these polymers, they are particularly suited for the delivery of polynucleotides. Nanoparticles containing polymer/polynucleotide complexes have been prepared. The inventive polymers may also be used to encapsulate other agents to be delivered. They are particularly useful in delivering labile agents given their ability to buffer the pH of their surroundings. A system for preparing and screening polymers in parallel using semi-automated robotic fluid delivery systems is also provided.

Disclosed is a block copolymer formed by coupling the following components with each other: (a) a copolymer (A) of a polyethylene glycol (PEG) type compound with a biodegradable polymer; and (b) at least one oligomer (B) selected from the group consisting of poly(β-amino ester) and poly(amido amine). A method for preparing the same block copolymer, and a polymeric hydrogel type drug composition comprising the temperature and pH-sensitive block copolymer and a physiologically active substance that can be encapsulated with the block copolymer are also disclosed. The multiblock copolymer is obtained by copolymerization of a pH-sensitive poly(β-amino ester) and/or poly(amido amine) type oligomer, a hydrophilic and temperature-sensitive polyethylene glycol type compound and a hydrophobic and biodegradable polymer. Therefore, the block copolymer can form a polymeric hydrogel structure due to its amphiphilicity resulting from the combination of a hydrophilic group and a hydrophobic group in the copolymer and ionization characteristics depending on pH variations, and thus can be used as a drug carrier for target-directed drug delivery depending on pH variations in the body.

The present invention includes a catheter locking solution having both antimicrobial and anticoagulant properties including a local anesthetic and a viscosifying agent. The local anesthetic of the present invention may be an amino amide; an amino ester; an aminoacylanilide; an aminoalkyl benzoate; an amino carbonate; an N-phenylamidine compound; an N-aminoalkyl amid; an aminoketone, or combinations and mixtures thereof. In a particular embodiment of the present invention, the local anesthetic is tetracaine or dibucaine.

Self-polymerization of mono-aziridine (or azetidine) and multi-aziridine (or azetidine) containing compounds with vinyl group containing organic acid, such as acrylic acid (AA), 2-methylenesuccinic acid, 2,3-dimethylenesuccinic acid and etc, at ambient temperature results in the new type of cross-linked and linear type copolymers, respectively.

The polymerization of multi-functional aziridine (or azetidine) containing compounds with vinyl group containing organic acid results in the formation of high cross-linked polymers. The self-polymerization takes place at ambient temperature and the resultants, cross-linked polymeric networked materials, are solvent insoluble and potential for adhesive, composite matrix and other applications. These insoluble materials are hydrolyzed in an acidic or basic condition to form the water soluble β-amino acids.

A linear poly(β-aminoester) is obtained from the self-polymerization of vinyl group containing organic acid with mono-aziridine (or azetidine) containing compound at ambient temperature. poly(β-aminoester) is applicable for gene transfer, controlled drug release and other applications. This self-polymerization process offers a convenient route for preparing poly(β-aminoesters).

The invention relates to an ion stabilizer doped perovskite film. An ion stabilizer is doped in the perovskite film. The chemical structural formula of the ion stabilizer is R1-R-R2, wherein R is alkyl; R1 is any one of alkyl, aryl, hydroxyl, carboxyl, alkoxyl, amino, substituted amino, ester group and acylamino; and R2 is at least one of halogen, an oxygen-containing group, a sulfur-containing group, a nitrogen-containing group, a phosphorus-containing group, an arsenic-containing group and a carbon-containing group. The invention also discloses a preparation method and an application of theion stabilizer doped perovskite film. By doping the ion stabilizer, the battery performance of a doped perovskite solar battery is improved, and the stability of the solar battery is improved.

The invention publishes a technical method of the ignition-prevented settlement of poly-amino ester with reactivity and water ability. It uses multi-prussic acid ester, multi-alcohol compound and ignition-prevented multi-alcohol compound to react and produces the pre-polymer of poly-amino ester whose end-radicals is isocyanate group. Then block the end and then emulsificate NaHSO4 liquid and one or more organic solvent. Finally, accommodate pH to 2-6 by acid and then obtain the production. The invention applies to use cotton fiber or nitrile fiber for ignition-prevented settlement. The fabric's igniting prevention affect is obious and its physic mechanical ability changes little. Moreover, it does not emit harmful substance like formaldehyde. In short, the invention is a green ecotype aid and has a vast foreground.

Hair treatment compositions are disclosed comprising a β-amino ester compound in a cosmetically acceptable vehicle, such as a spray or cream. In embodiments, the compounds include a polybutadiene moiety. Methods of treating hair with the compositions to impart volume, texture and definition are also disclosed.

The invention provides a cyclobutyl-containing alpha-hydroxy-beta-amino ester compound. The invention discloses the novel compound with the formula (1), wherein R1 is alkyl, aryl or aralkyl, and R2 is alkyl. The invention also discloses a preparation method of the compound represented by the formula (1). The compound can be used in the synthesis of an anti-hepatitis C drug Boceprevir.

A curable formaldehyde-free binding composition for use with fiberglass is provided. Such curable composition comprises a conjugate addition product of an amine and an unsaturated reactant in the form of a β-amino-ester or β-amino-amide intermediate. The composition when coated on fiberglass is cured to form a water-insoluble polyamide or polyimide binder which exhibits good adhesion to glass. In a preferred embodiment the fiberglass is in the form of building insulation. In other embodiments the product is a microglass-based substrate for use in a printed circuit board, battery separator, filter stock, or reinforcement scrim.

The present invention relates to a nano filtration composite membrane and its preparation method. The membrane base body of said membrane is an ultrafiltration membrane, and it is characterized by that the surface layer of said membrane is made of polyacrylic amino ester polymer, and said surface layer has cross-linked net-like compact structure. Its preparation method includes the synthesis process, refining process, membrane-coating process and cross-linking process in turn. Said invention nano filtration composite membrane possesses higher removing rate for inorganic salt, can be up to 40-92%, and its water flux can be up to 10-95 l/sq.m h. Its raw material is easily available, and its production cost is low.

There is presently provided a stimulus-responsive polymer comprising a biodegradable polymer backbone and a stimulus-responsive pendant group attached to the biodegradable polymer backbone, wherein the biodegradable polymer backbone comprises a poly(amino ester) or a poly(amido amine), the poly(amido amine) optionally comprising a disulfide linkage in the backbone.

The invention provides α-amino esters of a hydroxypropylthiazolidine carboxamide derivative, (2S)-3-([1,1′-biphenyl]-4-ylsulfonyl)-N-[(1S)-3-hydroxy-1-phenylpropyl]-1,3-thiazolidine-2-carboxamide, as well as salts and crystal polymorphs thereof, that can be used to inhibit prostaglandin F receptor. The invention further encompasses methods of treating disorders such as pre-term labor at the early gestational stage by the administration of these substances to a patient in need of treatment.

The invention relates to a drug delivery device for providing local analgesia, local anesthesia or nerve blockade at a site in a human or animal in need thereof, the device comprising a fibrillar collagen matrix; and at least one drug substance selected from the group consisting of amino amide anesthetics, amino ester anesthetics and mixtures thereof, the at least one drug substance being substantially homogeneously dispersed in the collagen matrix, and the at least one drug substance being present in an amount sufficient to provide a duration of local analgesia, local anesthesia or nerve blockade which lasts for at least about one day after administration.

The invention falls into the biomedical field and relates to an electrostatic coating based non-viral nucleic acid ternary complex system (TCS) and the preparation method thereof. The TCS is prepared by autonomous compression of plasmid DNA or siRNA through cation polymer poly(beta-amino ester) to form a binary complex, and physical modification of the binary complex with multi-carboxyl polymer through electrostatic interaction. The invention can effectively compress and pack plasmid DNA or siRNA, enhance the lysosome escape of the TCS, and protect the plasmid from degradation in cell, thereby improving the efficiency of gene transfection and expression.

The invention discloses a preparation method of quick-response glucose-sensitive hydrogel which is quick in response to glucose stimulation in a physiological environment. The preparation method particularly includes adding acrylamidophenylboronic acid and acrylic acid amino ester, N-alkyl acrylamide and acrylamide or methacrylamide and N,N'-methylenebisacrylamide into an alkaline macromolecule aqueous solution, and stirring to dissolve completely so as to obtain a mixed solution; adding catalytic reaction accelerators tetramethylethylenediamine into the mixed solution with uniformly mixing; adding initiators accounting for 0.03-0.3% of monomer mass, into the obtained solution, and conducting room temperature reaction to obtain the hydrogel containing a macromolecular copolymer shown as structural formula (I). Alkaline macromolecules in the preparation method are a macromolecule component containing amino or partially containing lactam group and can enhance glucose sensitivity and responsiveness of the hydrogel in the physiological environment by being added, so that stability in use of the hydrogel is improved.

The invention relates to a charge reversal Pulullan derivative and a synthesis method and application thereof. The Pulullan derivative is composed of a Pulullan framework, a multi-amino modified group and a beta-carboxylic acid amide modified group, has remarkable liver/liver cancer targeting property, and can quickly respond to a faintly acid tumor microenvironment and a cell endosome/lysosome so as to achieve reversal from electronegativity to electropositivity. By modifying poly(beta-amino ester) (PBAE)/polylactic acid-polyglycolic acid copolymer (PLGA) composite nanoparticles with the Pulullan derivative, liver cancer targeted delivery of nanoparticles can be mediated efficiently, effective release of a carried drug at the tumor position is achieved, and the charge reversal Pulullan derivative is a liver/liver cancer targeted carrier material with excellent performance for drugs, genes and image contract agents and has broad application space.

The acrylate emulsion modified with acrylic acid monomer containing amino ester and seed emulsion containing epoxy group has improved cohesion to base material and thus greatly raised water resistance and wash fastness. Using the anionic and non-ionic emulsifier with olefine group makes the emulsion possess greatly raised electrolyte stability and low temperature stability and further raised water resistance. Furthermore, the emulsion with raised flowability and low temperature stability makes it possible to reduce the amount of glycol, propylene glycol and other water soluble solvent and thus reduce VOC in preparing emulsion paint, and this is favorable to protecting environment and saving energy. The emulsion is used in emulsion paint for outer wall.