60 results about "Living anionic polymerization" patented technology

Fabric care compositions adapted for use in a laundering process such as detergent compositions and laundry rinse compositions, comprise at least one reactive cationic polymer (preferably amine- or amide-epichlorohydrin resin or a derivative thereof), at least one reactive anionic polymer and at least one textile compatible carrier. The compositions have improved dye transfer and stain release properties and may be used in methods of treating fabric as part of a laundering process.

A nanoparticle which includes a multi-armed core and surface decoration which is attached to the core is prepared. A multi-armed core is provided by any of a number of possible routes, exemplary preferred routes being living anionic polymerization that is initiated by a reactive, functionalized anionic initiator and ε-caprolactone polymerization of a bis-MPA dendrimer. The multi-armed core is preferably functionalized on some or all arms. A coupling reaction is then employed to bond surface decoration to one or more arms of the multi-armed core. The surface decoration is a small molecule or oligomer with a degree of polymerization less than 50, a preferred decoration being a PEG oligomer with degree of polymerization between 2 and 24. The nanoparticles (particle size ≦10 nm) are employed as sacrificial templating porogens to form porous dielectrics. The porogens are mixed with matrix precursors (e.g., methyl silsesquioxane resin), the matrix vitrifies, and the porogens are removed via burnout. Greater porosity reduces the dielectric constant k of the resulting dielectrics. The porous dielectrics are incorporated into integrated circuits as lower k alternatives to silicon dioxide.

The present invention is a coupled radial anionic polymer comprising a polyhedral oligosilsesquioxane [POSS] of the formula [R—SiO_3/2]_n. POSS compounds having R=vinyl, glycidyldimethyl silyl, and isobutyl have been found effective in coupling anionic living polymers to yield radial polymers having 2 to 10 arms. Radial polymers of the present invention have been formed using POSS octamers and mixtures of POSS octamers, decamers and dodecamers. The present invention also relates to a process for coupling living anionic polymers with POSS compounds.

The invention discloses a method for preparing terminal carboxyl group polymer through active anionic polymer termination, and belongs to the field of anionic polymerization. The method comprises steps as follows: step (1), an active anionic polymer solution is prepared and has the concentration of 5-20g/ 100 ml, active anionic polymer comprises homopolymer or copolymer of styrene, butadiene and isoprene; step (2), oxa-cycloalkane is added into the active anionic polymer solution, the mixture reacts for 10-50 minutes at the temperatures ranging from 20 DEG C to 60 DEG C, and a solution of active polymer with an oxygen anion terminal is prepared; and step (3), the solution of active polymer with the oxygen anion terminal is mixed with acid anhydride, the mixture reacts for 20-120 minutes at the temperatures ranging from 20 DEG C to 100 DEG C, and a product is terminated by a methanol solution of HCl or an ethanol solution of HCl. The method is a new terminal carboxyl group functionalization method and is provided for solving problems of excessive side reactions, rigorous reaction conditions and the like of a conventional method for preparing terminal carboxyl group polymer through anionic polymerization; and by means of the method, terminal carboxyl group functionalized polymer with a controllable terminal structure can be obtained under the mild condition, the side reaction is few, and the operation is simple.

The invention belongs to the technical field of butyl rubber preparation, and relates to a slurry polymerization method for preparing bimodal distribution star-shaped branched butyl rubber by using animino-terminated functionalized macromolecular branching agent. The slurry polymerization method comprises two steps of synthesizing the imino-terminated functionalized macromolecular branching agentand synthesizing the star-branched butyl rubber with amino; a copolymer of styrene and derivatives of styrene, and isoprene is prepared by adopting active anionic polymerization technology, and the imino-containing branching agent macromolecules are obtained by using Schiff base for end capping. The preparation method comprises the following steps: dissolving the branching agent into chloromethane, adding an obtained mixture into a butyl rubber slurry polymerization kettle, and preparing the star-shaped branched butyl rubber with bimodal distribution by taking the branching agent as a cationic polymerization grafting agent and a slurry stabilizer. Lower Mooney stress relaxation and intrinsic viscosity are achieved, and better processability is achieved; the imino groups introduced duringend capping can increase the polarity of the branching agent, so that the dispersion of carbon black in a butyl rubber matrix is facilitated, the compatibility of butyl rubber and carbon black is improved, and the system energy is reduced.

The invention discloses a preparation method of an eight-arm heteroarm star-shaped polymer. A polystyrene lithium compound is synthesized through a living anionic polymerization method, and then subjected to an addition reaction with monohydroxy heptaethylene polyhedral oligomeric silsesquioxane in benzene to obtain a seven-arm star-shaped polystyrene crude product; slightly excessive low addition products are removed by utilizing a fractional precipitation method, thus pure monohydroxy functional seven-arm star-shaped polystyrene can be obtained, and hydroxyls of the pure monohydroxy functional seven-arm star-shaped polystyrene are subjected to azide modification to obtain seven-arm star-shaped polystyrene containing azide groups. On the other hand, polycaprolactone, polyethylene glycol, polymethylacrylic acid-N, N-dimethylamino ethyl ester, and tert-butyl methacrylate of which the ends contain alkynyls are respectively synthesized, and subjected to cycloaddition reaction with alkynyls and azides at the generating end of the seven-arm star-shaped polystyrene containing the azide groups to obtain the product; the method has the characteristics of high reaction efficiency, mild reaction conditions and few side reactions. The star-shaped polymer prepared by the invention is controllable in structure and molecular weight, and relatively narrow in molecular weight distribution.

The present invention provides a radiation sensitive composition for a color filter comprising (A) a pigment, (B) a dispersant, (C) an alkali-soluble resin, (D) a polyfunctional monomer, (E) a photopolymerization initiator and (F) a solvent, wherein the dispersant (B) comprises an acrylic copolymer obtained through living anionic polymerization and having an amine value (unit; mgKOH/g) and an acid value (unit; mgKOH/g) each greater than 0.

The invention provides a boron alkyl-halogenated onium salt system and an application thereof in living polymerization of epoxy monomers and belongs to the field of an epoxy resin. An epoxy monomer active anion controllable polymerization reaction system provided by the invention contains an initiator, a catalyst, a solvent and epoxy monomers, wherein the halogenated quaternary ammonium salt or halogenated quaternary phosphor salt is taken as the initiator and the boron alkyl is taken as the catalyst. The epoxy monomer polymerization system provided by the invention is capable of efficiently triggering the epoxy monomer controllable anionic polymerization reaction under the conditions of shorter period and room temperature. An epoxypropane/ethane polymer prepared according to the system provided by the invention can be applied to the additives of aviation chemical products.

The invention relates to a circular polymer and a preparation method thereof. The active anion polymerizing and end-capping techniques and the ring-opening polymerization (ROP) are adopted to synthesize a linear polymer with hydroxyls at both ends; sodium hydride (NaH) and propine bromide are adopted to modify chain-end hydroxyls into propargyls; the ROP is adopted to synthesize a linear polymer which is polycaprolactone (PCL) with hydroxyls at both ends; the propiolic acid is adopted to modify chain-end hydroxyls into propargyls; the atom transfer radical polymerization (ATRP) is adopted to synthesize linear polymer with bromine-based group at two ends; the nitrogen-oxygen free radical compound containing propargyls is adopted to modify chain-end bromine-based groups into propargyls; and the Glaser coupling reaction of the propargyls is adopted to synthesize the circular polymer in the presence of cuprous bromide (CuBr) and N, N, N', N'' and N''-pentamethyl diethylenetriamine (PMDETA).

The present invention provides a thermoplastic elastomer composition having excellent fluidity, compression set and flexibility, and a block copolymer which provides the thermoplastic elastomer composition. Specifically disclosed is a hydrogenated block copolymer obtained by hydrogenating a block copolymer which is obtained by reacting a living polymer represented by formula (1): B1-A-B2-X (wherein B1 and B2 each represents a polymer block mainly composed of a structural unit derived from a conjugated diene compound; A represents a polymer block mainly composed of a structural unit derived from a vinyl aromatic compound; and X represents an active end of the living anionic polymer) with a coupling agent. The mass of the polymer block B1 before the hydrogenation reaction relative to the total mass of the polymer blocks B1 and B2 is within the range of 0.10-0.45, and the contained amount of the structural unit derived from a vinyl aromatic compound relative to the mass of the hydrogenated block copolymer is within the range of 25-50% by mass.

The present invention provides a method for producing a block copolymer, which includes subjecting styrene or a derivative thereof (excluding α-methylstyrene) to living anionic polymerization in the presence of a polymerization initiator by means of a microreactor having a channel being capable of mixing a plurality of liquids with each other, reacting a propagation end of the resultant polymer block (A) derived from styrene or a derivative thereof with α-methylstyrene to obtain an intermediate polymer having a polymer unit (B) derived from α-methylstyrene bonded to one end of the polymer block (A), and then subjecting a)meth)acrylate compound (c) to living anionic polymerization in the presence of a polymerization initiator so that the polymer unit (B) derived from α-methyl styrene in the intermediate polymer serves as a propagation end to form a polymer block (C) derived from the)meth)acrylate compound (c)

A cyclic conjugated diene copolymer comprising a main chain comprised of (A) cyclic conjugated diene monomer units, (B) monomer units obtained from vinyl aromatic monomers each having a hydrogen atom at the α-position thereof, and optionally (C) monomer units obtained from commoners which are other than the monomers used for obtaining the monomer units A and B and which are copolymerizable with at least one of the monomers used for obtaining the monomer units A and B, wherein all monomer units A and the monomer units B together form one or more polymer chains each having an A/B random sequence, wherein the one or more polymer chains each having an A/B random sequence contain at least one polymer chain having a number average molecular weight of from 20,000 to 500,000 and contain no polymer chain having a number average molecular weight of more than 500,000. A process for producing the above-mentioned cyclic conjugated diene copolymer by living anionic polymerization.

The radiation-sensitive composition for a color filter contains (A) a pigment, (B) a dispersant, (C) an alkali-soluble resin, (D) a polyfunctional monomer, (E) a photopolymerization initiator and (F) solvent. The dispersant (B) essentially comprises an acrylic copolymer obtained by living anion polymerization and having >0 amine value (mgKOH/g) and 0 acid value (mgKOH/g). The use amount (in terms of solid content) of the acrylic copolymer is 3 to 35 parts by weight with respect to 100 parts by weight of the pigment (A).

The invention relates to an air atmosphere anion ring-opening polymerization method of an N-sulfonyl aziridine derivative. The preparation method comprises the following step: by taking sulfur anionswith stable air as an initiator, adding the sulfur anions, an N-sulfonyl aziridine derivative monomer and a solvent according to a stoichiometric ratio in an air atmosphere to carry out active anion ring-opening polymerization, so as to obtain a corresponding polymer. The initiator and the monomer of the polymerization system are insensitive to air and water, air atmosphere active anion polymerization can be achieved, the initiator has numerous varieties and is easy to obtain, the polymerization system is suitable for a wide variety of monomers, and large-scale controllable preparation of homopolymers and copolymers of the N-sulfonyl aziridine derivative can be achieved. Because a high vacuum technology and an inert atmosphere are not needed, the method is suitable for industrial scale-upproduction.

The invention discloses an application of hydrogenated styrene thermoplastic elastomers in preparation of artificial heart valves. The thermoplastic elastomers are a block polymer synthesized through active anionic polymerization, a solid phase or a dispersed phase is polystyrene, and a rubber phase is a hydrogenated conjugated diene polymer or a hydrogenated conjugated diene and styrene random copolymer. The hydrogenated styrene elastomers used in the invention have excellent biological stability, anti-coagulation performance, anti-calcification performance and mechanical strength, and can be used for preparing the artificial heart valves with more durable performance than that of a bioprosthetic valve.

The invention relates to an organic-inorganic nano composite particle and a preparation method and application thereof, in the preparation process, active anionic polymerization is utilized to initiate polymerization of diene monomers or styrene monomers to obtain a macroinitiator; activity conversion on an active center of the polymer macroinitiator is carried out by using 1, 1-diphenylethylene, and initiating of a vinylpyridine monomer to carry out active anionic polymerization induced self-assembly is realized, so that block polymer nano self-assembled particles are obtained; cross-linking of the nano self-assembled particles is carried out by using a cross-linking agent and the nano self-assembled particles are taken as a polymer template; a pyridine group is complexed with metal ions, and a series of organic-inorganic nano composite particles are prepared through a reduction reaction. The preparation method of the organic-inorganic nano composite particles prepared by the invention is realized in one pot, and has the advantages of simplicity, high efficiency, strong universality, clean system, high solid content, controllable morphology and the like.

There is provided a novel chain-end functionalized PEO of formulas (I) to (IV) prepared via living anionic polymerization and chain-end functionalization, as well as a simple method of preparing nano-sized transition metal or metal salt particles using the same, which can be readily stabilized even in an aqueous medium. The water-soluble PEO-based polymers having various functional groups (including a drug group such as vitamin and anti-cancer agent) and the process of preparing nano-sized transition metal or metal salt particles using the same can be advantageously used in the development of new materials for drug delivering system and imaging, e.g., a contrast agent and an anti-cancer agent simultaneously.

Provided are a vinyl-biphenylpyridine monomer and a polymer thereof. More particularly, the present invention provides a vinyl-biphenylpyridine monomer having a side chain of pyridine or phenylpyridine as a functional group, a homopolymer of which molecular weight and molecular weight distribution are controlled using the monomer, and a block copolymer of which molecular structure and molecular weight are controlled to facilitate synthesis of an organic metal complex. Accordingly, the present invention provides a vinyl-biphenylpyridine monomer and a polymer thereof which are effectively used as nano and optical functional materials.

This invention deals with an approach to control anionic polymerization. The anionic polymerization is conducted by adding a kind of initiator ligand compound, directly or in the form of solution into the monomer or initiator at the same or different time, or at different stages. The metal atoms in the ligand can form the association with the initiator cations, while the alkyloxy groups in the intiator ligand can restrict the entering channel of the addition of the monomers due to their relatively large volume or steric hindrance. Therfore, the initiator ligand compound can restrict the rate of anionic polymerization, restrain the side reaction, and make the anionic polymerization possible to be conducted at room or even higher temperature.

The molar ratio of initiator ligand compound to initiator is from 0.01:1 to 20:1. Compared with present technologies, the method of this invention can control and adjust the homopolymerization and copolymerization rate, side reactions and the polymerization temperature, and make it possible to industrialize.