36results about How to "Desirable stability" patented technology

A multinuclear transition metal compound which has two or more catalytic active sites, and is useful in preparing the olefin polymer and copolymer, is disclosed. The multinuclear transition metal compound for olefin polymerization includes two or more metals, and at least one ligand having a cyclopentadienyl moiety, which connects the two or more metals. The preferable multinuclear transition metal catalyst for olefin polymerization includes the first transition metal, the first η ligand having a cyclopentadienyl moiety, which is coordinated to the first transition metal, and the second transition metal to which the second η ligand having a cyclopentadienyl moiety is coordinated, wherein the second transition metal is bonded to the first η-ligand via a sigma (σ) bond.

A block copolymer of the formula [S-I-(I/B)]_nX or [S-I-(I/B)-/B]_nX or mixtures thereof wherein each S is independently a polymer block of an alkenyl arene; each I is a polymer block of isoprene; each B is a polymer block of butadiene and each (I/B) is a mixed random polymer block of isoprene and butadiene in a weight ratio I:B of from about 10:90 to about 90:10, n is an integer equal to or greater than 2, X is the residue of a coupling agent, and wherein the alkenyl arene content of the block copolymer represents a weight ratio of the alkenyl arene block to conjugated diene block of the total block copolymer and is in the range of from about 15 to about 35 wt %. Compositions for the manufacture of transparent, gel-free films, adhesives, fibers, injection molded articles, dipped goods, oil gels, and bitumen are also disclosed and comprise from about 3 to about 90 wt % of the claimed block copolymer and one or more components selected from thermoplastic resins, polyolefins, tackifying resins, end block resins, polystyrene, oils, engineering thermoplastics, fillers, and antioxidants.

A catalyst system capable of producing a cyclic olefin polymer having a polar functional group and a high molecular weight with a high yield in which a catalyst is not deactivated due to polar functional groups of monomers, and a method of producing polymers using the same are provided. The catalyst system for polymerization of olefin according to the present invention has good thermal and chemical stability, and thus, in the method of preparing polyolefin using the catalyst system, the deactivation of a catalyst due to a polar functional group of the monomer can be prevented, and thus a high yield of the cyclic olefin polymer with a high molecular weight can be obtained when a ratio of the catalyst to the monomer is 1:5000, and the removal of a catalyst residue is not required.

A liquid dish cleaning composition with desirable cleansing properties comprising a C_8-18 ethoxylated alkyl ether sulfate, two anionic surfactant, a betaine surfactant, an alkyl polyglucoside surfactant, a hydroxy containing organic acid, and water.

Disclosed is a method for preparing a cycloolefin polymer containing polar functional groups, comprising: preparing a catalyst mixture including i) a precatalyst, containing a Group 10 transition metal having a ligand containing oxygen ions bonded to the metal; ii) a first cocatalyst which is an organic compound containing a Group 15 element; and iii) a second cocatalyst which is capable of providing an anion and weakly coordinating to the metal of the precatalyst; and subjecting a monomer solution comprising a norbornene-based compound containing a polar functional group to an addition polymerization reaction in the presence of an organic solvent and the catalyst mixture, at a temperature of 80-200° C., the total amount of the organic solvent being 50-800% by weight based on the total weight of the monomer contained in the monomer solution, and the product yield of the polymer being 50% by weight or more based on the total weight of the monomer.

A process is provided in which at least one multi-functional alcohol having a hydroxyl functionality of at least two serves as a polymerization initiator. The multi-functional alcohol initiator is optionally, although preferably, reacted with a catalyst to form a catalyst-initiator complex, which is then used in the polymerization of glycidyl nitrate. The resulting poly(glycidyl nitrate) has a functionality substantially equivalent in number to the hydroxyl functionality of the multi-functional alcohol initiator. The poly(glycidyl nitrate) is cross-linked with at least one aromatic polyisocyanate having at least one aromatic ring and, on average, more than two isocyanate moieties bonded directly to the aromatic ring.

The present disclosure relates to an ink-jet ink set which, in spite of using a black ink including a black pigment, may form printed matter (e.g., images) with desirable water resistance and/or color balance after fading (fading stability) and/or ink-jet ink sets with desirable storage stability. An ink set may include a yellow dye ink including a yellow dye, a magenta dye ink including a magenta dye, a cyan dye ink including a cyan dye and a black ink. A black ink may include a black pigment, a yellow dye, a magenta dye and a cyan dye. A black ink may have a weight ratio of an amount of a black pigment to a total amount of the yellow dye, the magenta dye, and the cyan dye of from about 5/95 to less than about 30/70 (e.g., from about 5/95 to about 30 (but not inclusive of 30)/70).

The invention discloses a freeze-dried nanometer powder injection of ursolic acid and a preparing method thereof. It major composes of active material of ursolic acid, complex vehicle of nanometer powder, excipient of freeze-drying. Compared to other popular preparations, its advantages are high target application of liver, concentrate on the affects, increase curative effect, decrease side effect, high dispersity and stability. It is prepared through dissolving ursolic acid as active raw material in medical organic solvent, adding complex vehicle of bean lecithin and stearic acid, stirring while heating until reaction completed, adding distilled water, adding excipient, stirring while heating until reaction completed, filtering with microporous membrane and freeze-drying the filtrate. Its average particle size is 209.5 mm, drug loading is 25.2%. it is for inhibiting and treating liver cancer, decreasing expression of p53, bcl-2 and topo-II.

The invention provides a dental implant including a neck portion, a bottom portion and a body portion. The body portion connects the neck portion and the bottom portion. The body portion has a first end, a second end and a plurality of threads. The threads are disposed between the first end and the second end. Along a long axial direction and a direction from the first end to the second end, the cusp widths of the threads gradually increase, or heights from the cusp to the root of the threads gradually decrease. Therefore, the dental implant can be used to gradually squeeze and expand the alveolar bone and meanwhile improve the density of the alveolar bone, so that the dental implant has desirable initial-stage stability after the dental implant surgery, thereby solving the micromotion phenomenon after the instant dental implant surgery, and facilitating subsequent osseointegration.

A powdered composition is disclosed, the powdered composition comprising a complex between one or more cannabinoids having at least one phenolic moiety and a basic ion exchange resin. Also, an orally dispensable delivery vehicle, a method of manufacturing the powdered composition, a method of manufacturing the orally dispensable delivery vehicle, composition for use as a medicament, composition for use in a treatment, method of treatment, and use of a basic ion exchange resin as a stabilizing agent are disclosed.

The present invention relates to a polypropylene composition comprising a long chain branched polymer having high melt strength. The process for preparing the corresponding polypropylene having composition is provided comprising blending a propylene base polymer with a unsaturated polyfunctional poly(alkylsiloxane), a polyfunctional acrylate coagent, an initiator, additives such as stabilizer, acid neutralizer and antioxidants, and reactive extruding the blend to form a branched polymer composition bridged by siloxane units.