Abstract: A method for treating carbon dioxide includes preparing a polyamine composition and delivering a stream containing carbon dioxide to the polyamine composition. The carbon dioxide reacts with polyamine in the polyamine composition to form a carbamate salt. A method for producing polyurea from carbon dioxide includes delivering a stream containing carbon dioxide to a polyamine composition. The carbon dioxide reacts with polyamine in the polyamine composition to form a carbamate salt. The method also includes dehydrating the carbamate salt to produce polyurea.

Abstract: An intermediate transfer member includes a mixture of a polyimide, a polyalkylene glycol ester, an optional polysiloxane, and an optional conductive filler component.

Abstract: Disclosed herein are a method for preparing a benzoxazole-based polymer by thermal rearrangement, the benzoxazole-based polymer prepared by the method and a gas separation membrane comprising the polymer. More specifically, provided are a method for preparing a benzoxazole-based polymer by subjecting poly(hydroxyamide) as an intermediate to thermal treatment involving dehydration, the benzoxazole-based polymer obtained thereby and gas separation membrane comprising the polymer. The benzoxazole-based polymer of the present invention can be simply prepared by thermally rearrangement via thermal treatment at low temperatures, and thus exhibits superior mechanical and morphological properties and has well-connected microcavities. Due to showing excellent permeability and selectivity for various gases, the benzoxazole-based polymer is suited for application to gas separation membranes, in particular, gas separation membranes for small gases.

Abstract: The present invention discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO2/CH4 and H2/CH4 separations. The polyimide membranes have CO2 permeability of 50 Barrers or higher and single-gas selectivity for CO2/CH4 of 15 or higher at 50° C. under 791 kPa for CO2/CH4 separation. The polyimide membranes have UV cross-linkable functional groups and can be used for the preparation of UV cross-linked polyimide membranes having CO2 permeability of 20 Barrers or higher and single-gas selectivity for CO2/CH4 of 35 or higher at 50° C. under 791 kPa for CO2/CH4 separation.

Abstract: A UV-protective water-soluble polyaminoamide comprising UV-absorbing end groups, wherein the polyaminoamide absorbs ultraviolet light radiation having a wavelength of about 200 nm to about 420 nm, compositions comprising the UV-protective polyaminoamide and methods of treating substrates with the UV-protective polyaminoamide.

Abstract: A series of novel phosphorus-containing compounds having the following formula is provided: in which: R1-R4, A, Q and m are as defined in the specification. A process for the preparation of the compound of formula (I) is also provided. A polymer of formula (PA), and preparation process and use thereof are further provided. A polymer of formula (PI), and preparation process and use thereof are also provided.

Abstract: The invention provides a process for the preparation of valerolactone, said process comprising reacting levulinic acid with hydrogen by using a solid Ru catalyst, characterized in that the process is carried out in the presence of at least 0.08% (w/w) water relative to the amount of levulinic acid. Said process may be faster and more selective. This process advantageously allows the production of valerolactone from renewable sources. The valerolactone may be used in the preparation of methylpentenoate, adipic acid dimethylester, adipic acid, hexamethylenediamine, and polyamide 6,6 (all claimed).

Abstract: Disclosed is a process for preparing a compound of the formula wherein R1 and R1?, R2 and R2?, and R3 are as defined herein, said process comprising (I) reacting a diacid of the formula HOOC—R2—COOH with a diamine of the formula H2N—R3—NH2 to form an acid-terminated oligoamide intermediate of the formula HOOC—R2—CONH—R3—HNCO—R2?—COOH; and (II) reacting the acid-terminated oligoamide intermediate with a monoalcohol of the formula R1—OH in the presence of a tin or organic titanate catalyst, in the absence of a coupling agent, and in the absence of a solvent to form the product. Also disclosed is a composition prepared by the process.

Abstract: A polyimide resin which is satisfactory in solvent solubility and heat resistance, has a low coefficient of water absorption and is excellent in adhesive properties and a method for manufacturing the same, a film containing the subject polyimide resin and a metal-clad laminate including an adhesive layer composed of the subject polyimide resin are provided. The polyimide resin is a polyimide resin containing a molecule having a repeating unit represented by a structure of any one of the following formulae (1) to (3) in a specified proportion, whose molecular end is capped by an end-capping agent.

Abstract: A co-polyester which includes the reaction product of a polycondensation polyester and epsilon-caprolactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof and a diol. The co-polyester is injectable and absorbable into animal, such as human, tissue and can be used for facial cosmetic or reconstructive surgery of soft tissue. Another embodiment is directed to a method for preventing adhesion using a co-polyester comprising the reaction product of a polycondensation polyester and epsilon-caprolactone, wherein the polycondensation polyester comprises the reaction product of diglycolic acid and/or a derivative thereof and a diol, and the co-polyester comprises about 40 to 50% by weight of the polycondensation polyester based on the total weight of the co-polyester.

Abstract: The present invention discloses blend polymer membranes comprising thermally rearranged polymers derived from aromatic polyimides containing ortho-positioned functional groups and methods for making and using these blend polymer membranes. The blend polymer membranes described in the current invention are prepared by heat treatment of blend polymer membranes comprising aromatic polyimides containing ortho-positioned functional groups such as —OH or —SH groups. In some instances, an additional crosslinking step is performed to improve the selectivity of the membrane. These blend polymer membranes have improved flexibility, reduced cost, improved processability, and enhanced selectivity and/or permeability compared to the comparable polymer membranes that comprise a single polymer.

Abstract: Poly(?-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.

Abstract: A thermoplastic polymer composition comprises a combination of: 40 to 60 pbw, of a polyetherimides, polyetherimide sulfones, or combination thereof having a weight average molecular weight from 5,000 to 80,000 Daltons; 40 to 60 pbw of a polyethylene terephthalate, the polyethylene terephthalate having a diethylene glycol content from 0.1 to 4 wt %, based on the weight of the polyethylene terephthalate, an intrinsic viscosity that is more than 0 and less than 0.83 dl/g, and carboxylic acid end groups in an amount from 10 to 150 meq/Kg; from 0 pbw to 1 pbw, based on 100 pbw of the polymer composition of a stabilizer selected from phenol-containing stabilizers, phosphorus-containing stabilizers, or a combination thereof; and, based on the weight of the polyethylene terephthalate, 10 to 300 antimony; 0 to 300 ppm of cobalt; and 0 to 300 ppm of titanium; wherein the polymer composition is bisphenol A free.

Abstract: The present invention provides a low-modulus low-stress resin which has such heat resistance that cohesive force and reliability can be retained even at high temperatures and which is applicable as various functional materials. The resin is a thermoplastic resin having a modulus of elasticity at room temperature, 25° C., of 1 GPa or lower and a modulus of elasticity at 250° C. of 1 MPa or higher, or a precursor resin thereof.

Abstract: A continuous process is disclosed for the extraction of monomeric caprolactam and its oligomers as the raw polymer product obtained in the polymerization of polyamide-6 in which no fresh water, but processing water or previously used extraction water is used for the granulation.

Abstract: Guanidine-based poly (amidoamine) polymers of formula (I): wherein n is an integer between 3 and 400; R1 is H, C1-6 alkyl; or taken together with the N atoms to which is bound and R2 is a piperazinic ring; R2 is C2-6 alkylen; C5-6 cycloalkylen; CH—COOH, CH—COOR, wherein R is C1-4 alkyl, phenyl or benzyl; R3 is —(CH2)p-HN—C (NH2)?NH, wherein p is an integer 1 to 6; for use as antiviral agents in the prevention and/or treatment of viral infections in a mammal, preferably a human subject.

Abstract: A process for preparing polyimide resins comprises stirring a diamine and a dianhydride in a solvent to form a slurry; heating the slurry to a temperature sufficient for the diamine and dianhydride to react wherein the temperature is below the melting point of the dianhydride, below the melting point of the diamine, or below the melting points of the dianhydride and diamine; and reacting the diamine and dianhydride to form a polyimide having sufficient molecular weight to precipitate from the solvent.

Abstract: In one aspect, the present invention describes biodegradable photoluminescent polymer (BPLP) compositions. In some embodiments, an aliphatic biodegradable photoluminescent polymer (BPLP) composition comprises a degradable oligomer, wherein the oligomer is synthesized from a diol, an amino acid, and a biocompatible multifunctional carboxylic acid comprising a hydroxyl group. The amino acid is linked as a side group to the degradable oligomer backbone, and fluorescence emanates from a 6-membered ring formed by a carboxylic acid group of the amino acid, an alpha carbon of the amino acid, an amide linkage formed by an amino group of the amino acid, and a central carbon of the multifunctional carboxylic acid via an esterification reaction of the carboxylic acid group of the amino acid and the hydroxyl group of the multifunctional carboxylic acid.

Abstract: Novel, crosslinked polymers using biomass derived materials, such as aldaric acids and derivatives, are provided. The polymers can be used as hydrogels and in antimicrobial compositions.

Abstract: The present disclosure provides polyamides and amidoamine curing agents including the reaction product of (1) a modified amine component comprising at least one multifunctional amine of structure 1: wherein R1 is selected from C1-C16 linear, cyclic, and branched alkyl, alkenyl, and alkaryl groups; R2 and R4 are hydrogen, R3 is R1 or hydrogen, X, Y, and Z are independently selected from C2-C10 alkylene, hexylene and cycloalkylene groups, n=0, 1, 2, 3, 4, 5, 6, or 7; and (2) a fatty acid component. Exemplary fatty acid components include at least one of monomer fatty acids, dimer fatty acids, trimer fatty acids, polymer fatty acids, esters of monomer, dimer, trimer, and polymer fatty acids and combinations thereof. The method for making the curing agents and articles formed therefrom are also disclosed.

Abstract: The invention is directed to maleimide thermosets incorporating imide-extended mono-, bis-, or polymaleimide compounds. These imide-extended maleimide compounds are prepared by the condensation of appropriate anhydrides with appropriate diamines to give amine terminated compounds. These compounds are then condensed with excess maleic anhydride to yield imide-extended maleimide compounds.

Abstract: A process for the production of non-thermoplastic polyimide film whose precursor solution has high storage stability and which exhibits high adhesiveness even without expensive surface treatment, more specifically, a process for the production of non-thermoplastic polyimide film made of a non-thermoplastic polyimide containing a block resulting from a thermoplastic polyimide which comprises (A) the step of forming a prepolymer having amino or an acid anhydride group at the end in an organic polar solvent (B) the step of synthesizing a polyimide precursor solution by using the obtained prepolymer, an acid anhydride, and a diamine in such a way as to become substantially equimolar over the whole step, and (C) the step of casting a film-forming dope containing the polyimide precursor solution and subjecting the resultant dope to chemical and/or thermal imidization, wherein the diamine and acid dianhydride used in the step (A) are selected so that the reaction of both with each other in equimolar amounts can give

Abstract: The present invention relates to a medical device for angioplasty or parts thereof, which is made of elastomeric material, wherein the elastomeric material comprises a polyamide-based polymer obtained from the polymerization of a compound forming polyamide blocks that is selected from the group consisting of an aminocarboxylic acid of Formula (1) and a lactam of Formula (2): with a polyether diamine triblock compound of Formula (3): and a dicarboxylic acid of Formula (4): HOOC—(R3)m-COOH??(4) wherein the groups R1, R2 and R3 are each binding groups comprising a hydrocarbon chain therein that may be interrupted by one or more amide groups; x is an integer from 1 to 20; y is an integer from 4 to 50, z is an integer from 1 to 20; m is 0 or 1.

Abstract: Radiopaque polymers have a main chain and a plurality of amide groups which have bound to the amide nitrogen atom thereof an organohalide group that is pendant to the polymer main chain, the organo halide group including one or more iodine and/or bromine atoms thereon. The polymer may be a modified polyamide polymer, copolymer or block copolymer or a modified poly(meth)acrylamide or (meth)acrylamide copolymer or block copolymer. The polymers may be employed in medical devices and are useful for instance to track the movement of a catheter through the body or the inflation of a balloon at a site. The polymers may be made by coupling reactions performed on preexisting amide polymers.

Abstract: A method polymerizes a monomer to form a polyamide having a reagent incorporated therein. In the method, a masterbatch is formed that includes the reagent. The masterbatch and the monomer are introduced into a reactor, and the monomer is polymerized in the presence of the reagent to form the polyamide having the reagent incorporated therein. The monomer may be a caprolactam monomer that may be polymerized in a VK tube reactor to form polyamide 6 having at least one free acid site. The reagent may be present in an amount of from 1 to 10 parts by weight per 100 parts by weight of the masterbatch. Additionally, the masterbatch and caprolactam may be introduced into the top of the VK tube reactor.

Abstract: A method for obtaining a composition of an aromatic polyamide containing para-phenylene terephthalamide and 2-(p-phenylene)benzimidazole terephthalamide units, the method including copolymerizing: i) a mole % of para phenylenediamine; ii) b mole % of 5(6)-amino-2-(p-aminophenyl)benzimidazole; and iii) 90-110 mole % of terephthaloyl dichloride in a mixture of N-methyl pyrrolidone and containing c wt. % of calcium chloride, wherein c is within the range from 1 to 20, and wherein the ratio a:b ranges from 1:20 to 20:1, a+b is 100 mole %, and i), ii), and iii) together comprise 1-20 wt. % of the mixture, wherein the product b·c is at least 50 and less than 215 and that the composition is a crumb with a relative viscosity ?rel of at least 4, wherein the crumb is defined as non-sticky particles at least 95% of which having an average diameter of 0.7-15 mm.

Abstract: The disclosure relates to methods and materials useful for depolymerizing a polymer. In one embodiment, for example, the disclosure provides a method for depolymerizing a polymer containing electrophilic linkages, wherein the method comprises contacting the polymer with a nucleophilic reagent in the presence of a guanidine-containing compound. The methods and materials of the disclosure find utility, for example, in the field of waste reclamation and recycling.

Abstract: An object of the present invention, which was made to solve the problems above, is to provide a polyimide precursor resin composition superior in transparency allowing reduction of the residual volatile material rate during molding and giving a polyimide resin composition (e.g., polyimide film) superior in mechanical properties and transparency even when a cheaper polyamide-imide is used.

Abstract: Disclosed is an acetylenic polyamide and a composition comprising said acetylenic polyamide, which acetylenic polyamide. Said acetylenic group is suitably obtained by subjecting at least one acetylenic compound to reaction with either at least one polyamide, or at least one amino functional monomer and/or carboxylic acid, yielding a corresponding acetylenic amide monomer, oligoamide or polyamide. Amide monomers and/or oligoamides can subsequently be used in production of the acetylenic polyamide.

Abstract: Disclosed herein are polymer compounds and a method for preparing thereof. More specifically, provided are polymer compounds with well-connected, narrow size distribution free-volume element and a method for preparing the polymer compounds by thermal rearrangement for aromatic polyimides containing ortho-positioned functional groups in the solid state.

Abstract: The present invention relates generally to mercaptofunctional high ?? EO chromophores and EO polymers, and particularly to mercaptofunctional high ?? EO chromophores and EO polymers useful for making electro-optical devices and systems. Mercaptofunctional high ?? EO chromophores are covalently bonded to poly(imido sulfide) polymers producing high Tg, low optical loss, covalently bonded, high ?? EO chromophore containing polymers. Methods of synthesizing these EO materials using mild polymerization conditions are also described.

Abstract: A novel polyimide compound which has a low linear expansion coefficient and permits film formation by a spin coating method or the like, a preparation method for the polyimide compound, and an optical film and an optical waveguide produced by employing the compound. The polyimide compound has a structural unit represented by the following general formula (1): wherein X is a covalent single bond, —CH2—, —C(CF3)2— or —CR(R?)— (wherein R and R?, which may be the same or different, are each a C1 to C6 alkyl group or an aryl group); A and B, which may be the same or different, are substituents each selected from a hydroxyl group, a halogen group and a C1 to C4 alkyl group; a and b, which are the numbers of the substituents A and B, respectively, are each an integer of 0 to 2; and o, p and q are each an integer of 1 to 5.

Abstract: Disclosed is a liquid crystal alignment agent that includes a polymer comprising polyamic acid including a repeating unit represented by the following Chemical Formula 1, polyimide including a repeating unit represented by the following Chemical Formula 2, or a combination thereof. In Chemical Formulae 1 and 2, X1, X2, Y1 and Y2 are the same in the detailed description.

Abstract: This invention is the design and synthesis of a caprolactone monomer which bears a pendant protected carboxyl group. This monomer has been copolymerized with caprolactone in varying ratios. After polymerization, the protecting group can be removed and an antibiotic can be attached as a new pendant group. The bioactivity of the antibiotic-bound poly(caprolactone) polymer is described.

Abstract: New bioresorbable polymers are synthesized from monomer analogs of natural metabolites In particular, polymers are polymerized from analogs of amino acids that contribute advantageous synthesis, processing and material properties to the polymers prepared therefrom, including particularly advantageous degradation profiles.

Abstract: An insulated wire including a conductor, and an insulating film formed by coating and baking an insulating varnish on the conductor directly or via another insulation layer. The insulating varnish includes a phenolic hydroxyl group-containing polyimide resin represented by a chemical formula (1): where X is a tetravalent aromatic group composing an aromatic tetracarboxylic dianhydride residue, Y1 is a divalent aromatic group including one or more phenolic hydroxyl groups and Y2 is a divalent aromatic group not including a phenolic hydroxyl group A ratio of the number Z1 of phenolic hydroxyl groups included in Y1 of the chemical formula (1) to the number Z2 of an imide group included in the chemical formula (1) is 0.15?Z1/Z2?0.85.

Abstract: Polyesteramides prepared from decreased perfection diamide diester monomers. The polymers exhibit improved physical properties.

Abstract: The invention provides new aliphatic diester-di-acid-containing PEA polymer compositions with significant improvement in hydrolytic degradation rates as compared to aliphatic di-acid-containing PEA polymers. The di-acids used in the invention PEA compositions include non-toxic fatty aliphatic homologs. These molecules inherently contain two-ester groups, which easily can be cleaved by biotic (enzymatic) and abiotic hydrolysis. Additional di-acid-type compounds useful for active polycondensation are ?,?-alkylene dicarboxylates composed of short aliphatic non toxic diols and di-acids. In addition, the invention PEA polymer compositions optionally can include a second monomer, such as a C-protected L-lysine-based monomer, to introduce additional chain flexibility into the polymer. The invention PEA polymer compositions are useful for delivery of bioactive agents when administered internally.

Abstract: A biodegradable cross-linked cationic multi-block copolymer of linear polyethylenimine (LPEI) wherein the LPEI blocks are linked together by hydrophilic linkers with a biodegradable disulfide bond and methods of making thereof. The biodegradable cross-linked cationic multi-block copolymer may also contain pendant functional moieties which are preferably receptor ligands, membrane permeating agents, endosomolytic agents, nuclear localization sequences, pH sensitive endosomolytic peptides, chromogenic or fluorescent dyes.

Abstract: The present invention is directed to linear, biodegradable polyesteramide (PEA) polymers synthesized with repeating units derived from aminophenol esters and diacids. These PEAs have a monomer repeat represented by as well as a variety of uses to coat, form or comprise medical devices, combination medical devices and pharmaceutical compositions, including sustained release formulations.

Abstract: Diamine compounds, which in particular are useful as precursors for the production of liquid crystal alignment layers, are represented by the general formula I: wherein A1 represents an organic group of 1 to 40 carbon atoms; A2 represents a hydrogen atom or an organic group of 1 to 40 carbon atoms.

Abstract: A polyamide resin composition for reflectors, which gives a molding having high mechanical strength and excellent heat resistance and which stably exhibits a high reflectance and can provide a reflector that resists a decrease in reflectance caused by heating, particularly in a LED production process and a reflow soldering process. A reflector obtained by molding the resin composition is also provided. The polyamide resin composition is composed of defined amounts of a polyamide resin (A), an inorganic filler (B) and a white pigment (C) (with the proviso that the total of the components (A), (B) and (C) does not exceed 100% by weight). The components of the polyamide resin (A) are defined and the polyamide resin (A) has a terminal amino group concentration of 70 to 230 mmol/kg.

Abstract: An inkjet ink capable of forming a polyimide film having, for example, strong mechanical strength, is provided. The inkjet ink contains: a polyamic acid (A) having a weight-average molecular weight of 50,000-500,000; one or more of an amic acid compound (B1) and an amic acid compound (B2), in which the amic acid compound (B1) is prepared from a compound (a3) having two or more anhydride groups and a monoamine (a5), and the amic acid compound (B2) is prepared from a diamine (a4) and a compound (a6) having one anhydride group; and a solvent (C).

Abstract: Provided are a new pH-sensitive co-polymer prepared from polyethylene oxide and a method of preparing the same. The polyethylene oxide co-polymer includes repeating units expressed by the Chemical Formulas 1 and 2, and further includes at least one of repeating units expressed by the Chemical Formulas 3 through 6.

Abstract: Higher diamondoid derivatives capable of taking part in polymerization reactions are disclosed as well as intermediates to these derivatives, polymers formed from these derivatives and methods for preparing the polymers.

Abstract: The invention relates to a non-fibrous polymer solution essentially consisting of 1 to 8 wt. % para-aramid, at least 50 mole % of the aromatic moieties thereof being unsubstituted, in a mixture of a) a polar amide solvent selected from N-methyl-2-pyrrolidone, N,N?-dimethylformamide, N,N?-dimethylacetamide, tetramethylurea, and mixtures thereof; b) between 0.7 mole of an alkali or earth alkali chloride per mole amide groups of the para-aramid and 7.5 wt. % of the alkali or earth alkali chloride, and c) water; and wherein at least 50 wt. % of the formed hydrochloric acid has been neutralized to obtain a solution having a dynamic viscosity which is at least a factor three smaller than the dynamic viscosity of the polymer solution without neutralization. The invention further pertains to a process making the same and para-aramid pulp-like fiber, paper and film made from said polymer solution.

Abstract: New polyols; oligomers, and polymers made from the polyols; and binders made from the new polyols, oligomers, or polymers that can be used in binders, where the binders typically include one or more polyols, and a polyfunctional acid or a polyfunctional nitrile.

Abstract: The disclosure relates to methods and materials useful for polymerizing a monomer. In one embodiment, for example, the disclosure provides a method for polymerizing a monomer containing a plurality of electrophilic groups, wherein the method comprises contacting the monomer with a nucleophilic reagent in the presence of a guanidine-containing catalyst. The methods and materials of the disclosure find utility, for example, in the field of materials science.

Abstract: Polycondensates with long-chain linear methylene sequences, their production, a method for producing linear odd-numbered C>20 ?,?-dicarboxylic acids and derivatives thereof and applications of the polycondensates are described.

Abstract: A polyamide resin comprising a dicarboxylic acid constitutional unit comprising an adipic acid unit and a diamine constitutional unit comprising a pentamethylenediamine unit and a hexamethylenediamine unit wherein a weight ratio of the pentamethylenediamine unit to the hexamethylenediamine unit being in the range of 95:5 to 60:40; a vibration-welded molded product having an excellent vibration welding strength, a hinged molded product and a binding band having an excellent low-temperature toughness, and a filament having an excellent transparency which are obtained from the polyamide resin; and a hinged molded product comprising a polyamide resin constituted of an adipic acid unit and a pentamethylenediamine unit.