46results about How to "Increase shear viscosity" patented technology

The invention provides artificial tear compositions, artificial tear-gel compositions, contact lens storage compositions, contact lens treatment compositions, ophthalmological drug vehicle compositions and topical drug vehicle compositions comprising one or more nonionic surfactants with one or more non-Newtonian viscosity enhancing excipients and one or more of a polyol and or an electrolyte and methods of their use.

The invention provides a coating used in the papermaking field. The coating contains nanometer microcrystalline cellulose, a pigment, a latex, an assistant and water, and the nanometer microcrystalline cellulose is highly-crystallized cellulose having a length of 100-500nm and a width of 3-100nm obtained by hydrolyzing a cellulose raw material in a strong acid; and the bone dry mass parts of the nanometer microcrystalline cellulose, the pigment, the latex, the assistant and water in the coating are 0.02-10, 75-95, 5-15 and 0.35-10 respectively. The invention also provides a coated paper made by using the coating. The coating is coated on the surface of paper to effectively improve the glossiness, the post-print glossiness and the roughness of the coated paper in order to improve the paper quality.

A dispersion contains particles of metal oxide having a median volume particle diameter in the range from 24 to 42 nm which are dispersed in a medium which includes a mixture of at least one polar material having an interfacial tension of less than 30 mNm−1 and at least one siloxane fluid. The dispersion can be used in a sunscreen product that exhibits effective UV protection, transparency, and improved skin feel.

The invention is directed to topical drug vehicle platform compositions for ophthalmological and dermatological use. These compositions comprise a means to sequester tears and an ophthalmological drug. The invention is further directed to methods of treating a spectrum of ocular surface disease epitheliopathies including but not limited to dry eye in a human or mammal. The invention is further directed to contact lenses, punctum plugs, pellets or any other device used to deliver drugs to the surface of the eye, coated or infused with compositions of the invention.

The invention discloses a waterproof crack-resisting coating and a preparation method thereof, and relates to the field of coating materials. The waterproof crack-resisting coating is prepared from the following components in parts by weight: 40 to 80 parts of elastic emulsion, 15 to 20 parts of ZnO-CeO2 particles, 10 to 30 parts of Portland cement, 20 to 40 parts of quartz sand, 10 to 30 parts ofcomplexing agent, 10 to 30 parts of cellulose, 10 to 30 parts of water reducing agent, 3 to 5 parts of defoaming agent, 3 to 5 parts of dispersing agent, 3 to 5 parts of leveling agent and 3 to 5 parts of thickening agent. The waterproof crack-resisting coating provided by the invention has the advantages of excellent waterproof and crack resistance, scrubbing resistance, pulverization resistance, stain resistance, weather fastness, good aging resistance, storage stability, low cost, greenness and environment friendliness.

The invention provides a method for forming a TiO2-latex composite particle dispersion comprising combining an aqueous TiO2 dispersion with a latex manufactured with a phosphate-containing ethylenically unsaturated reactive surfactant. The dispersions have improved opacity or hiding.

The invention discloses a novel oil-based fracturing fluid. The novel oil-based fracturing fluid is prepared from raw material components in percentage by mass as follows: 4 %-7 % of nano-silica and the balance of an oil-soluble base solution. The oil-based fracturing fluid contains simple components, and various requirements of the oil-based fracturing fluid are met; a preparation method is simple, convenient and easy to implement, and gel breaking is simple, so that the purposes of simplifying the construction process and reducing the cost are achieved.

The present invention provides a poly(meth)acrylate viscosity index improver which has a polymer chain containing a structural unit represented by formula (1) and a structural unit represented by formula (2), and of which the Mw is at least 100,000 and Mw / Mn is at most 1.6. [R1 indicates hydrogen or a methyl group, R2 indicates a group represented by formula (3), and R3 indicates an alkyl group having 1-18 carbon atoms and a straight chain or a branch having at most 5 carbon atoms. m and n are integers that satisfy m>=5 and n>=4 and m+n<=31.

The present invention provides a poly(meth)acrylate viscosity index improver that has a polymer chain containing a structural unit represented by general formula (1), and that has a weight average molecular weight (Mw) of at least 100,000 and a ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of at most 1.6. [In formula (1), R1 represents hydrogen or a methyl group, and R2 represents a C1-36 alkyl group.]

A computer-implemented method and non-transitory computer medium for calculating a shrinkage of a molding product comprises a step of using a computer processor to calculate a molding pressure of a molding fluid in a molding cavity by taking into consideration an increase of a shear viscosity of the molding fluid by a decrease of a shear rate, and a step of calculating the shrinkage of the molding products by taking into consideration a variation of a specific volume of the molding fluid as the molding pressure and a molding temperature decrease.

The present invention provides a viscosity index improver that is excellent in an effect of improving a viscosity index and a high-temperature high-shear viscosity of oils, etc. The viscosity index improver of the present invention includes a hydrogenated product of a copolymer containing a constitutional unit (a) derived from an aromatic vinyl compound and a constitutional unit (b) derived from a conjugated diene, a content of a constitutional unit (b1) derived from farnesene in a whole amount of the constitutional unit (b) derived from the conjugated diene being from 1 to 100% by mass, and a content of a constitutional unit (b2) derived from a conjugated diene other than farnesene in a whole amount of the constitutional unit (b) derived from the conjugated diene being from 0 to 99% by mass, and 50 mol % or more of carbon-carbon double bonds in the constitutional unit (b) derived from the conjugated diene being hydrogenated.

The invention relates to innovative cellulose derivatives with low surface swelling in aqueous suspension, with high relative high-shear viscosity, and with high thermal flocculation point in water, and also to their use in building-material systems.

There is disclosed a lubricant composition comprising a base oil, wherein the ratio of isoparaffins to normal paraffins in the base oil ranges from about 30 to about 400.

Long-chain branched poly(p-dioxanone) disclosed by the invention is prepared from star-branched hydroxyl-terminated poly(p-dioxanone) and monohydroxyl-terminated linear polymer by chain extension reaction with a coupling agent, wherein the star-branched hydroxyl-terminated poly(p-dioxanone) has number average molecular weight of 10<3>-10<5>; the monohydroxyl-terminated linear polymer has the number average molecular weight of 5*10<2>-1.5*10<4>; and the long-chain branched poly(p-dioxanone) has intrinsic viscosity of 0.5-4 dL / g, tensile strength of 25-50 MPa and elongation at break of 290-700%. The invention also discloses a preparation method of the long-chain branched poly(p-dioxanone). According to the long-chain branched poly(p-dioxanone) disclosed by the invention, the processing performance of a polymer is improved by long-chain branching, the problem of shaping processing difficulty caused by cross-linking easily occurring in a preparation process in the prior art is avoided, and the shearing viscosity and mechanical performance of the long-chain branched poly(p-dioxanone) are greatly improved.

The invention belongs to the technical field of biological medicine, and relates to a double-phase crosslinked sodium hyaluronate gel with controllable shearing viscosity, and a preparation method andpreparations thereof. The preparation method comprises following steps: 1, dissolving of sodium hyaluronate; 2, crosslinking of sodium hyaluronate; 3, smashing and dialysis of crosslined sodium hyaluronate blocks; and 4, mixing of crosslinked sodium hyaluronate gel with non-crosslinked sodium hyaluronate. The preparation method is capable of increasing product shearing viscosity greatly; the shearing viscosity can be adjusted through adjusting the adding ratio of non-crosslinked sodium hyaluronate; the machinery extruding effect of a colloid mill is capable of realizing entering of non-crosslinked sodium hyaluronate into crosslinked sodium hyaluronate gel particles, so that a three-dimensional net structure of obtained gel finished products is more stable, product elastic modulus is increased at a certain degree, and gel or gel preparations with expected effects are achieved.

The invention discloses a synthesis method to prepare hyperbranched polycation electrolyte based on self-condensing atom transfer radical (co)polymerization and is characterized in that the method makes use of an initiated monomer containing quaternary ammonium salt structures to obtain hyperbranched polycation electrolytes through the aqueous phase self-condensing atom transfer radical copolymerization of the initiated monomer, or through the aqueous phase self-condensing atom transfer radical copolymerization of other cationic unsaturated monomers. The method can obtain the polycation electrolyte simultaneously provided with high branching degree and high charge density in one step, and is simple in procedures; the obtained hyperbranched polycation electrolyte can be used for phase transfer catalysis, flow modification, immune diagnostic reagent and other occasions.

The invention is directed to a topical lidocaine gel composition comprising lidocaine or a salt thereof and magnesium chloride. The invention is further directed to a method of inducing local anesthesia in an eye of a patient comprising topically applying compositions of the present invention to the eye of the patient.

Soy protein and carbohydrate containing binder compositions are described. The binder compositions may include a carbohydrate, a nitrogen-containing compound, and a soy protein. The binder compositions may also optionally include thickening agents such as modified celluloses and polysaccharides.

The invention discloses a novel insulating composite material and a preparation method thereof and relates to the technical field of insulating materials. The novel insulating composite material is prepared from raw materials in parts by weight as follows: 30-40 parts of polyamide resin, 10-20 parts of epoxy cellulose acetate, 8-15 parts of calcium carbonate, 5-15 parts of silicon nitride, 8-15 parts of modified nano hydroxymethyl cellulose crystals, 3-8 parts of magnesium stearate, 8-13 parts of kaolin, 5-11 parts of silicon dioxide, 5-12 parts of mica particles, 6-14 parts of glass fibers, 2-6 parts of a silane coupling agent, 3-8 parts of a filling agent, 1.5-3.5 parts of an ultraviolet absorbent, 2.2-5.3 parts of an antioxidant, 0.8-4.6 parts of an anti-freezing agent and 1-5 parts ofa flame retardant.

The invention discloses an associative thickening vac-veova emulsion and a preparation method thereof, and belongs to the technical field of research and development of architectural coatings; the vac-veova emulsion comprises the following components by the mass percentages: 40-50% of water, 1-3% of an emulsifier, 30-40% of vinyl acetate, 5-15% of butyl acrylate, 5-15% of tertiary carbonic ester VV-10, 0-1% of acrylic acid, 1-20% of an associative thickening monomer, and 0.5-2% of persulfate. The method includes the steps: pre-emulsifying a portion of water, a portion of the emulsifier and other components except persulfate; dissolving a portion of persulfate in water; taking and adding the balance of water and the balance of the emulsifier into a reaction kettle, and then putting the emulsified liquid as a seed for reaction; then adding a part of the remaining sulfate, at the same time, dropping the rest of the persulfate and the emulsified liquid, controlling the temperature and carrying out heat preservation; and post-processing. The prepared vac-veova emulsion can form a dense associative network structure and effectively improves the medium and high shear viscosity of a coating.

The invention discloses long-chain branched polylactic acid with high melt strength and excellent processing fluidity. The long-chain branched polylactic acid is characterized by being prepared from the following raw materials in percentage by weight: 93.00-99.80% of polylactic acid; 0.10-2.00% of an organic peroxide; and 0.1-5.00% of a branching regulating agent. The invention also provides a preparation method of the long-chain branched polylactic acid with high melt strength and excellent processing fluidity. According to the invention, a compound containing one vinyl or allyl group and one epoxy bond or isocyanate group is used as a branching regulating agent, and a long-chain branched structure is uniformly introduced into a polylactic acid molecular chain by adopting a reactive extrusion technology so that the long-chain branched polylactic acid has excellent melt strength and processing fluidity at the same time.

The invention discloses an associated thickening agent generated by a rheologic and modified monomer and a preparation method of the associated thickening agent. The associated thickening agent generated by the rheologic and modified monomer is characterized by being a polymer emulsion with solid content of 28-32%, wherein the polymer emulsion is formed by carrying out emulsion polymerization reaction on methacrylic acid (MAA) accounting for 38-42% of the total mass of a monomer, ethyl acrylate (EA) accounting for 46-50% of the total mass of the monomer and a docosyl-polyoxyethylene methacrylate and tristyrylphenol ethoxylate methacrylate mixture HPM-400 accounting for 10-13% of the total mass of the monomer; the adding amount of an emulsifier accounts for 6-9% of the weight of the monomer. The thickening agent prepared by the invention can be used for remarkably increasing the viscosity of water and can also be used for increasing the viscosity of a waterborne paint and improving the splashing resistance of the waterborne paint when used for the waterborne paint.

The invention is directed to compositions comprising polysorbate 80, poloxamer 407, poloxamer 188, polyoxyl 35 castor oil, hydroxypropyl gamma cyclodextrin, hydroxypropylmethylcellulose, polyethylene glycol 400, mannitol, magnesium chloride, sodium chloride and potassium sorbate. The invention is further directed to a method of treating dry eye comprising topically applying compositions of the present invention to the eye of a subject in need thereof.

The present invention provides a poly(meth)acrylate-based viscosity index improver having a core, and three or more arms comprising a polymer chain containing a structural unit represented by formula (1) and a structural unit represented by formula (2), one end of said polymer chain being bonded to the core. The weight-average molecular weight (Mw) of the poly(meth)acrylate-based viscosity index improver is at least 100,000, and the weight-average molecular weight / the number average molecular weight (Mn) is not more than 1.6. [R1 represents hydrogen or a methyl group; R2 represents the group represented by formula (3); and R3 represents an alkyl group with 1 to 18 carbons. m and n are integers that satisfy m >= 5, n >= 4, and m + n <= 31.]

The invention provides artificial tear compositions comprising one or more nonionic surfactants with one or more non-Newtonian viscosity enhancing excipients and menthol and methods of their use.

The invention provides an emulsion stabilizer for preventing excessive emulsification of ink, and belongs to an ink assistant. The emulsion stabilizer is prepared by compounding an anti-emulsificationcomponent, lecithin and a nonionic surfactant. According to the invention, lecithin is compounded with an anti-emulsifying component and a water-in-oil type nonionic surfactant, so that good stability is achieved; and after the emulsion stabilizer is added into ink, the shear viscosity and leveling property of ink can be improved, the ink can be endowed with excellent hydrophobic property, the ink is emulsified in the kneading and squeezing process and quickly achieves water-oil balance, and the water-based ink has a better effect of controlling the emulsification of the ink.

The invention relates to an anti-mite unit dose article. The invention provides an anti-mite unit dose product containing a water-soluble polymer film. The water-soluble polymer film is formed as a pouch having an internal compartment, the inner compartment encloses a liquid laundry detergent composition therein. The liquid laundry detergent composition is characterized in that the liquid laundrydetergent composition is prepared, a high shear viscosity in the range of 100 mPas to 900 mPas measured at a shear rate of 1000 s-1 and a temperature of 20 DEG C, wherein the liquid laundry detergentcomposition comprises from 20% to 70% by total weight of the liquid laundry detergent composition of one or more non-soap surfactants and from 1% to 20% benzyl benzoate. The presence of benzyl benzoate in this amount in unit dose articles not only provides an anti-mite benefit, but also reduces liquid wiredrawing that may lead to film seal failure during the manufacturing process of such unit dosearticles, without negatively affecting the film plasticization characteristics.

The invention is directed to a topical composition comprising one or more topical active ingredients, one or more nonionic surfactants, one or more viscosity enhancers, polyethylene glycol and menthol. The invention is further directed to a method of reducing or eliminating pain comprising applying a composition of the present invention to a subject in need thereof.

The present invention relates to a composition comprising an aqueous dispersion of xanthan gum and opacifying pigment particles such as TiO2 encapsulated with a vinyl ester polymer or a vinyl ester-acrylate copolymer, as well as a method for its preparation. The composition is useful in coatings formulations, especially paint formulations.