135 results about "Stabilizer for polymers" patented technology

A metal nanoparticle colloid solution, metal-polymer nanocomposites, and methods for preparing the same are provided. The metal nanoparticle colloid solution and the metal-polymer nanocomposites can be prepared with a variety of polymeric stabilizers and have uniform particle diameter and shape. The metal nanoparticle colloid solution and the metal-polymer nanocomposites have wide applications, for example, as an antibacterial agent, a sterilizer, a conductive adhesiv, conductive ink or an electromagnetic wave shielder for an image display.

A non-aqueous dispersion comprising the dispersion polymerization reaction product of an ethylenically unsaturated monomer and a nonlinear, random acrylic polymer stabilizer is disclosed. Related coatings, methods, and substrates are also disclosed.

An aqueous dispersion including (A) at least one base polymer selected from the group consisting of an ethylene-based co-polymer and a propylene-based co-polymer; (B) at least one polymeric stabilizing agent; and at least one filler; wherein the polymeric stabilizing agent is different from the at least one base polymer and is compatible with the at least one base polymer and the at least one filler, and wherein the dispersion has filler in the range of greater than 0 to about 600 parts per hundred parts of a combined amount of the at least one base polymer and the polymeric stabilizing agent is disclosed.

Disclosed are multi-purpose polymers that are the polymerization product of a monomer mixture comprising at least one amino-substituted vinyl monomer; at least one nonionic vinyl monomer; at least one associative vinyl monomer; at least one semihydrophobic vinyl surfactant monomer; and, optionally, comprising one or more hydroxy-substituted nonionic vinyl monomer, crosslinking monomer, chain transfer agent or polymeric stabilizer. These vinyl addition polymers have a combination of substituents, including amino substituents that provide cationic properties at low pH, hydrophobic substituents, hydrophobically modified polyoxyalkylene substituents, and hydrophilic polyoxyalkylene substituents. The polymers provide surprisingly beneficial rheological properties in acidic aqueous compositions, and are compatible with cationic materials. The multi-purpose polymers are useful in a variety of products for personal care, health care, household care, institutional and industrial care, and industrial applications.

The invention relates to a cationic acrylamide copolymer aqueous emulsion-water and the method for preparing the same. The compound comprises 5-25 wt% of cationic polymer, 1.0-15 wt% of polymer stabilizer and 15-32 wt% inorganic salt. Said active cationic polymer comprises 72.8-90 mol% of at least one water-soluble monomer (A), 10-26 mol% of at least one cationic monomer (B), and 0.2-1.0 mol% of at least one hydrophobic monomer (C), and said polymer is prepared through free radical polymerization with pH being 3-8. The monomer (A) (B) possesses general formula respectively, monomer (c) is C1-C8 dialkyl ester of itaconic acid or C1-C32 alkyl ester of acroleic acid or C1-C32 alkyl ester or diene monomer of methacrylic acid. The method is multi-stage, and it can reduce polymerization system viscosity, increase active material content and stability of aqueous emulsion-in-water, which is characterized by high concentration, low cost, good fluidity and easiness for treatment.

The present disclosure includes a waterborne polyolefin based coating layer that has improved features as compared to epoxy coatings. The coating composition of the present disclosure include 40 to 80 weight percent (wt. %) of a base polymer; 10 to 30 wt. % of a polymeric stabilizing agent; 5 to 15 wt. % of a polymeric coupling agent; 0 to 35 wt. % of a polymeric performance improving agent; a neutralizing agent that partially or fully neutralize the polymeric stabilizing agent; and a fluid medium, where the wt. % values are based on the total weight of the base polymer, the polymeric coupling agent, the polymeric stabilizing agent and, when present, the polymeric performance improving agent (as used herein, this total weight of the base polymer, the polymeric coupling agent, the polymeric stabilizing agent and, when present, the polymeric performance improving agent may be referred to as the “solid content” of the coating composition).

A sensor comprises silver nanoparticles in which substantially all of the surfaces of the silver nanoparticles are available for interaction with an analyte or for functionalisation with a receptor which is capable of interacting with an analyte. Silver nanoparticles are preparated by forming the nanoparticles in the presence of a polymeric stabiliser such as PVA.

The present invention provides an article formed by impregnating a fibrous structure with a compound, the compound including an aqueous dispersion, the dispersion having (a) at least one polymer selected from the group consisting of an ethylene-based thermoplastic polymer, a propylene-based thermoplastic polymer, and mixtures thereof; (b) at least one polymeric stabilizing agent; and (c) water; and removing at least a portion of the water from the impregnated fibrous structure. The present invention also provides a method of forming a stiffened textile. The method may include the steps of: forming a compound, the compound including an aqueous dispersion having (a) at least one polymer selected from the group consisting of an ethylene-based thermoplastic polymer, a propylene-based thermoplastic polymer, and mixtures thereof, (b) at least one polymeric stabilizing agent, and (c) water; impregnating a textile with the compound; and removing at least a portion of the water from the impregnated textile.

The invention belongs to the technical field of oil production engineering, and provides a preparation method of a low molecular weight polymer clay stabilizer. The clay stabilizer is prepared from raw materials of carbon-containing ammonium salt and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) in the presence of an initiator in an aqueous solution through polymerization. The number average molecular weight of the polymer is less than 50000. The sulfonic acid group is introduced into the polymer stabilizer, so as to increase the water solubility and high temperature performance of the polymer. The stabilizer can form multiple point adsorption with a plurality of clay particles in the water; after adsorption, a layer of protective film is formed on the surface of clay particles to prevent expansion and migration of clay particles; and the stabilizer has the high temperature resistance performance reaching more than 120 DEG C.

The invention discloses a low-addition-amount environment-friendly alkali-free chlorine liquid accelerator. The low-addition-amount environment-friendly alkali-free chlorine liquid accelerator is prepared from, by mass, 45-55% of aluminum sulphate, 5-10% of magnesium sulfate, 5-10% of alcohol amine, 1-5% of organic acid, 1-5% of high-molecular polymer, 0-3% of a stabilizing agent and the balance water. The aluminum sulphate is at the industrial level, and the mass fraction percent of alumina is larger than or equal to 16.00. The magnesium sulfate is at the industrial level, and the alcohol amine is diethanolamine or triethanolamine. The organic acid is oxalic acid, formic acid or benzoic acid. The high-molecular polymer is polyacrylic acid or polyacrylamide. The stabilizing agent contains citric acid. The organic acid is used as a coagulation accelerating component and a pH adjusting agent, and on the basis that no alkali exists, the accelerator is stable and free of strength loss within 28 days, and concrete resilience is small, the addition amount is remarkably reduced; polyacrylic acid is used, not only is later-stage strength not affected, but also the stability of a solution is improved, and the stable time of the accelerator is longer than half a year.

The asphalt composition consists of petroleum asphalt 70-86 wt%, polymer 8-15 wt%, stabilizer 0.08-0.6 wt%, compatibilizing agent 6-10 wt% and stuffing 0-10 wt%. Its preparation process includes the following steps: heating petroleum asphalt to 175-185 deg.c and to reach flowing state, adding compatibilizing agent, polymer and stuffing successively through stirring, grinding in a colloid mill in the rotation speed of 2000-4000 rpm, swelling through stirring for 2-10, adding stabilizer and reacting for 1-5 hr to obtain the product. The asphalt composition has high stability at high temperature, high flexibility at low temperature and high elasticity restoring capacity, and is used in the antiscour layer of semi-rigid cement concrete road and the antifatigue layer of bridge.

A non-aqueous dispersion comprising a continuous phase and a dispersed phase, wherein the dispersed phase comprises the dispersion polymerization reaction product prepared from a reaction mixture comprising an ethylenically unsaturated monomer, an acrylic polymer stabilizer, and an aliphatic polyester stabilized seed polymer, is disclosed. Related coatings and coated substrates are also disclosed.

The present invention relates to compositions containing hydrolytically stable multi-purpose polymers that are polymerized from a monomer mixture comprising: at least one amino-substituted meth(acrylate) (ASMA) monomer or salt thereof; and at least one nonionic vinyl (NIV) monomer, wherein the monomer mixture optionally comprises one or more of at least one vinyl associative (VA) monomer; at least one vinyl surfactant (VS) monomer; and / or at least one polymerizable silicone macromer (PSM) and wherein the monomer mixture further optionally comprises one or more of at least one crosslinking (XL) monomer; at least one chain transfer agent (CTA); and / or at least one polymeric stabilizer. The multi-purpose polymers of the present invention can also be prepared from monomer mixtures containing chain transfer agents or other functional components commonly utilized in polymerization processes.

A composition and method of making a stabilizer for polymers. The composition has zinc oxide (ZnO) nanoparticles dispersed and having an average size of no more than about 15 nanometers, wherein the ZnO nanoparticles are provided as an additive to a polymeric material, thereby forming a stabilized polymer composite in which the ZnO nanoparticles remain dispersed and have an average size of no more than about 15 nanometers. The stabilized polymer composite is stabilized against heat and ultraviolet light. The polymeric material can be a (meth)acrylic resin, a styrenic resin, a pre-cure epoxy resin, or combinations thereof. In a concentrated form, the composition has ZnO nanoparticles that are typically less than 20% of the stabilized polymer composite. The stabilizer is polymerizable and may include additional additives.

A solid dispersion transdermal drug delivery system comprising a therapeutic agent in a stable amorphous form and a combination polymeric stabilizing and dispersing agent having a hydrogen bond-forming functional group, and a method of manufacturing these systems is provided. The weight ratio of the combination polymeric stabilizing and dispersing agent to the therapeutic agent is also disclosed.

The invention relates to a shale gas well slickwater fracturing fluid system high-efficiency emulsion quick water-soluble drag reducer, belonging to the technical field of oilfield drag reducers. The drag reducer is prepared by initiating polymerization of a component A, a component B and a component C by a free-radical initiator in water, wherein the component A is composed of a plurality of nonionic water-soluble monomers with carbon-carbon double bond; the component B is a water-soluble polymer stabilizer of univalent cationic monomers; and the component C is a univalent cationic inorganic salt. The drag reducer is simple to use, quick to hydrate and convenient to add, is green and environment-friendly, and has the advantages of high dissolution rate, no bubbling, salt resistance, calcium resistance, pollution resistance, high temperature resistance, favorable compatibility, no need of adding defoaming agent and the like; and the drag reduction efficiency can reach 70% when the drag reducer is used in fracturing. The drag reducer solves the problems of high tendency to granulation and low tendency to hydration in the use process of the existing drag reducer using dry powder, and the problem that the poor compatibility among various different ions and chemical assistants in the fracturing fluid can directly influence the feasibility and effectiveness of the slickwater fracturing.

A non-aqueous dispersion comprising the dispersion polymerization reaction product of an ethylenically unsaturated monomer and a nonlinear, random acrylic polymer stabilizer wherein the polymerization reaction product comprises epoxy functionality is disclosed. Related coatings, methods, and substrates are also disclosed.

In one embodiment, the present invention provides a method of forming a cellulose article having a specific volume of less than 3 cc / gm. The method includes the step of incorporating cellulose fibers with a compound, wherein the compound includes an aqueous dispersion. The aqueous dispersion may have at least one polymer selected from the group consisting of an ethylene-based thermoplastic polymer, a propylene-based thermoplastic polymer, and mixtures thereof; at least one polymeric stabilizing agent; and water. In certain embodiments, a combined amount of the at least one polymer and the at least one stabilizing agent comprises about 25 to about 74 volume percent of the aqueous dispersion.

The present invention provides glass polishing compositions and methods suitable for polishing a glass substrate at a down force of about 110 g / cm2 or less. One preferred polishing composition comprises a particulate cerium oxide abrasive (e.g., about 1 to about 15 percent by weight) suspended in an aqueous carrier containing a polymeric stabilizer, e.g., about 50 to about 1500 ppm of the stabilizer, and optionally, a water soluble inorganic salt. Preferably, the particulate cerium oxide abrasive has a mean particle size in the range of about 0.35 to about 0.9 μm. Another preferred composition comprises about 1 to about 15 percent by weight of a particulate cerium oxide abrasive characterized by a mean particle size of at least about 0.2 μm and a purity of at least about 99.9% CeO2, on a weight basis, suspended in an aqueous carrier at a pH at least about 1 unit higher or lower than the isoelectric point (IEP) of the cerium oxide abrasive.

The invention discloses a preparation method of organic siloxane microspheres with narrow particle size distribution and richly organized surfaces. The preparation method comprises the steps of (1) adding an anionic surfactant and a polymer stabilizer into deionized water, and mechanically stirring to prepare a dispersion liquid; (2) adding a siloxane monomer into the dispersion liquid, mechanically stirring for a certain period of time under a constant-temperature condition, and then adding a basic catalyst to initiate a reaction for a certain period of time to prepare a siloxane microsphere mixed liquid; (3) adjusting the pH value of the microsphere mixed liquid to a certain range, adding a silane monomer rich in organic groups, and stirring to react for a certain period of time to ensure that the silane monomer rich in organic groups is grafted to the siloxane microspheres through the reaction; and (4) centrifuging the reaction product to obtain a solid, and washing and drying to obtain the organic siloxane microspheres with narrow particle size distribution and richly organized surfaces. The preparation method disclosed by the invention is simple, is low in reaction condition requirement and low in preparation cost, and the prepared organic siloxane microspheres is narrow in particle size distribution and low in surface polarity.

The invention comprises a polymeric amphiphilic stabilizing agent and its use in the inverse-emulsion and inverse-suspenion polymerization of acrylic monomers. The stabilizing agent produces inverse-emulsions and inverse-suspensions having good stability, polymers with high molecular weights, high solid content, low coagulum and which can be branched providing a means to prepare branched, or structured, dry polymers. The stabilizing agent is amphiphilic copolymer that is prepared from a mixture of linear alkylmethacrylates monomers and acrylic or methacrylic acid co-monomers. Typically, the mixture of alkylmethacrylates is comprised of esters having alkyl moieties that are from 14 to 20 carbon atoms in length. The stabilizing agent copolymers typically have number average molecular weights from about 500 to 50,000 g / mol, or weight average molecular weights from 50,000 to 100,000 g / mol.

The present invention provides an aqueous suspoemulsion comprising (a) an oil phase comprising (i) at least one triazole active compound as emulsified component, solid at room temperature, (ii) at least one alkyl carboxylic acid amide as a solvent and a crystal growth inhibitor, and (iii) a polymeric stabilizer, and (b) a continuous water phase comprising (i) at least one strobilurin active compound as suspended solid component, solid at room temperature, (ii) at least one dispersant selected from the group consisting of methacrylic acid-methyl methacrylate-polyethyleneglycol graft copolymer, tristyrylphenolethoxylates and / or propylene oxide / ethylene oxide block copolymer with 10% to 50% EO, preferably with 20% to 50% EO and most preferably with 30% to 40% EO, (iii) water, and (iiii) additives, if appropriate. a process for preparing the suspoemulsion and its use for applying the active compounds comprised therein to plants and / or their habitat are also provided.

The present invention relates to a process for preparing a polymer dispersion comprising polymerising one or more water soluble anionic monomers (m1) and one or more non-ionic vinyl monomers (m2) present in a reaction mixture further comprising a polymeric stabiliser (B) and a polymeric co-stabiliser (C). It further relates to a polymer dispersion, the use of the polymer dispersion and a process for producing paper.

An emulsion composition for the topical application comprising: (a) A polymeric oily phase; (b) A polymeric emulsifier; (c) An aqueous phase; (d) A polymeric antimicrobial and optionally one or more components selected from polymeric film formers, inorganic and polymeric stabilizers, other inorganic or polymeric excipients and mixtures thereof.