37results about How to "Molecular weight" patented technology

Improved processes for atom (or group) transfer radical polymerization (ATRP) and novel polymers have been developed and are described. In certain embodiments, novel copolymers comprising a least one polymeric branch or polymeric block with a predominantly alternating monomer sequence are described. Novel copolymers comprising a least one polymeric branch or polymeric block with a gradient monomer structure are described. Additionally, novel copolymers comprising a least one polymeric branch or polymeric block with a predominantly periodic monomer sequence are also described. Novel copolymers having a water soluble backbone and at least two hydrophobic polymeric branches grafted to the water soluble backbone are also described.

A composition including polyalphaolefins that function as drag reducing agents and a process for the preparation of polyalphaolefins that function as drag reducing agents are disclosed. The process includes contacting alpha olefin monomers with a catalyst system, which includes a catalyst and an activator (co-catalyst) in a reactant mixture. The catalyst is a transition metal catalyst, preferably titanium trichloride, and the co-catalyst may include an alkylaluminoxane, alone or in combination, with a dialkylaluminum halide or a halohydrocarbon. The polymerization of the alpha olefin monomers produces a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of at least 10 dL/g. The addition of the alkylaluminoxane during the polymerization process provides for a non-crystalline, ultra-high molecular weight polyalphaolefin and a more uniform molecular weight distribution of the resulting polyalphaolefin, thereby creating a drag reducing agent superior to known drag reducing agents. A process for forming a drag reducing agent comprising a non-crystalline, ultra-high molecular weight polyalphaolefin having an inherent viscosity of about at least 10 dL/g and a process for reducing drag in a conduit are also disclosed.

A manufacturing method of an optical film provided with a convexoconcave structure, comprises the steps of: coating a resin solution including a first resin solved by a solvent onto an endless or roll-like mold provided with a convexoconcave structure, and forming a resin solution layer on the mold; laminating a film substrate onto the resin solution layer to make a laminated film before the solvent in the resin solution layer is completely dried, the film substrate including a second resin, which is capable of absorving the solution or is soluble by the solvent; and peeling the laminated film from the mold before the solvent in the laminated film is completely dried.

An energy ray-curable elastomer composition, which comprises an energy ray-curable compound (A) having a (meth)acryloyl group, a polythiol compound (B) having 2 to 6 mercapto groups per molecule, and a polyfunctional (meth)acrylate (C), characterized in that the ratio of the number of (meth)acryloyl functional groups in component (A) to the number of mercapto functional groups in component (B) is 100:0.1-100:5n (wherein n represents the number of mercapto groups per molecule of the polythiol compound), and component (C) is used at a ratio of 1-8 parts by mass per 100 parts by mass of component (A). Thus, an energy ray-curable elastomer composition, which can achieve both high breaking elongation and good processability and shows good compression set, can be provided.

A chemical mechanical polishing aqueous dispersion of the invention includes (A) a first water-soluble polymer having a weight average molecular weight of 500,000 to 2,000,000 and including a heterocyclic ring in its molecule, (B) a second water-soluble polymer or its salt having a weight average molecular weight of 1000 to 10,000 and including one group selected from a carboxyl group and a sulfonic group, (C) an oxidizing agent, and (D) abrasive grains, and has a pH of 7 to 12.

A composition for administration of a beneficial agent, contains a solvent mixture including a hydrophobic solvent and a hydrophilic solvent; a bioerodible polymer; and a beneficial agent. The polymer and the beneficial agent are dissolved. The composition has a low viscosity, allowing for easy injection through standard hypodermic needles.

A novel process is used to prepare synthetic rubbers (B) which feature very narrow molecular weight distribution and a correspondingly low value for the polydispersity index. The preparation process encompasses the treatment of a synthetic rubber with ultrasound, where the resultant synthetic rubber (B) has a lower weight-average molecular weight (M_w) than the synthetic rubber (A) used. The resultant synthetic rubbers (B) have excellent suitability for processing via extruder processes or injection-moulding processes.

The present invention relates to cosmetics comprising a hydroxyl compound obtained by the reaction of a di- or higher-valent alcohol with a monovalent carboxylic acid and dimer acid, characterized in that the hydroxyl compound is obtained by reacting diglycerin with isostearic acid, and then reacting the obtained ester compound with dimer acid, wherein a molar ratio among diglycerin, isostearic acid and dimer acid is in the range of 1.0:1.4 to 1.6:0.5 to 0.8. The present invention provides cosmetics comprising the hydroxyl compounds having a high hydroxyl value.

The invention relates to a process of preparing regioregular polymers, in particular head-to-tail (HT) poly-(3-substituted) thiophenes or selenophenes with high regioregularity and defined molecular weight, to novel polymers prepared by this process, to the use of the novel polymers as semiconductors or charge transport materials in optical, electrooptical or electronic devices including field effect transistors (FETs), electroluminescent, photovoltaic and sensor devices, and to FETs and other semiconducting components or materials comprising the novel polymers.

The present invention relates to a poly-gamma-glutamate (PGA) having an ultra-high molecular weight greater than 5,000 kDa. The ultra-high molecular weight PGA according to the present invention has a mean molecular weight greater than 13,000 kDa, and more than 95% of its molecules have a molecular weight ranging from 3,000 to 15,000 kDa. Also, it can be produced by the culturing of Bacillus subtilis var. chungkookjang. The ultra-high molecular weight PGA according to the present invention shows very excellent moisture-absorbing, moisture-retaining, sustained release, mineral solubility, and water-absorbing properties, and thus, can be used as a new and high value-added material in various applications.

A process for advantageously producing, in a short period of time, a phenolic novolak resin, in which substantially no unreacted aldehyde remains, by using a continuous reactor, while a generation of high order condensation products is prevented. In continuously producing the phenolic novolak resin by reacting at least one of phenols with at least one of aldehydes in the presence of an acidic catalyst by using a continuous reactor which has a long reaction tube: the reaction tube is provided with a heating zone and a temperature control zone; a mixture of raw materials is heated, at the heating zone, to a temperature not less than a temperature, at which a reaction heat is generated; and then the mixture is subjected to a cooling operation at the temperature control zone, while the pressure within the reaction tube is kept to be not lower than a vapor pressure of water.

The present invention relates to purification and use of a novel emulsion stabilizing polysaccharide. In particular, a polyelectrolyte exopolysaccharide with high molecular weight comprising a high molecular weight polymer with a tri-saccharide repeating unit is disclosed. In one aspect of the invention, methods are directed to isolating and purifying a high molecular weight exopolysaccharide (EPS) from a cell supernatant. In another aspect, methods are disclosed for isolating a lipopolysaccharide (LPS) and a high molecular weight Acinetobacter polyelectrolyte exopolysaccharide (APE) from Acinetobacter bacteria. Compositions are also directed to lipid nanoparticles comprising a therapeutic agent encapsulated by a high molecular weight polysaccharide and nanoparticles comprising a therapeutic agent bound to a cationic polysaccharide cross-linked with a polyanion.

The present invention relates to stabilizer composition for halogen-containing polymer. It has recently been found that tin-based thermal stabilizers with a bridging alkyl group between two tin centers are effective stabilizers while having effectively double the molecular weight of the corresponding non-alkyl bridged stabilizer. It is expected that ongoing experimentation will confirm that the alkyl bridged stabilizers have much lower volatility which leads to greater retention of the stabilizer in the finished article.

A use of a polymerizable ultraviolet absorber is disclosed, which is applied to a polyurethane preparation. The polymerizable ultraviolet absorber is obtained by reacting an UV absorber having a reactive hydrogen group with a polyisocyanate having three —NCO groups. In addition, a composition for forming polyurethane comprising the aforementioned polymerizable ultraviolet absorber is also disclosed.