20 results about "Stabilizer for polymers" patented technology

Increasingly, plastics made from fossil raw materials such as petroleum or natural gas are being supplemented or replaced by plastics based on renewable raw materials obtained through biochemical processes. The question of sustainability then also arises for the plastic additives used for these plastics (and for plastics made from fossil raw materials). Therefore, there is a need for plastic additives based on renewable and readily available raw materials that are highly effective, low volatility, and compatible with polymeric substrates.

The present invention relates to a polymer dispersion and its use. The dispersion comprises polymer in particle form dispersed in an aqueous liquid phase. The polymer particles are obtained by a radical polymerisation of monomers in a presence of a dissolved rosin component, in an aqueous polymerisation medium comprising a polymeric stabilizer. The monomers comprise a first monomer (i) selected from alkyl (meth)acrylates and a charge-carrying second monomer (ii) having a cationic charge, when measured at pH 3, selected from ethylenically unsaturated tertiary amines.

The invention discloses a preparation method of a high-salt-resistant ultra-deep low-pressure oil and gas well workover fluid, which is characterized by comprising the following steps: adding 10 parts by weight of nano SiO2 and 90-300 parts by weight of solvent into a three-mouth reaction bottle with a reflux condensing tube, stirring and dispersing the nano SiO2 at room temperature, then heating to 60-85 DEG C, adding 1.0-8 parts by weight of benzene ring-containing anion modifier, reacting for 6-24 hours under reflux, and cooling to room temperature to obtain the high-salt-resistant ultra-deep low-pressure oil and gas well workover fluid. Then centrifuging to remove the solvent and the unreacted modifier in the reaction system, and carrying out vacuum drying on the product under heating to obtain nano SiO2-BA containing heat-resistant benzene rings and anions; the preparation method comprises the following steps: pouring 1.0-40 parts of nano SiO2-BA into 1000 parts of a solvent at room temperature, stirring until the nano SiO2-BA is uniformly dispersed, then pouring 1.0-20 parts of a thickening agent into a nano SiO2-BA system, stirring until the thickening agent is completely dissolved, then sequentially adding 3.0-90 parts of a polymer stabilizer, 0.1-8 parts of a bactericide and 0.1-8 parts of a heat stabilizer into the thickening agent solution while stirring, and uniformly stirring to obtain a finished product. The workover fluid capable of resisting high salt and multivalent salt at the ultrahigh temperature of 180-240 DEG C is obtained.

The invention discloses a clay stabilizer for a polymer dry powder direct distribution variable-viscosity fracturing fluid. The clay stabilizer is prepared from quaternary ammonium salt, an alcohol amine compound and a polyamine compound as raw materials in a solvent. The quaternary ammonium salt is quaternary ammonium salt with the carbon chain length of C12-C18; the alcohol amine compound is selected from at least one of ethanolamine, dimethyl propanolamine, hydroxyethyl piperazine, piperidine, isopropanolamine, triisopropanolamine, aminomethyl propanolate, hydroxyethyl ammonium salt and the like; the polyamine compound is selected from any one of poly dimethyl diallyl ammonium chloride, polyquaternary ammonium salt, poly allylamine, polyurea, polybutanediamine, polyethyleneimine, polyethylene polyamine and a polyethyleneimine cross-linked substance. The clay stabilizer disclosed by the invention is particularly suitable for polymer dry powder direct distribution variable-viscosity fracturing fluid, the stability of clay can be remarkably improved, particularly, excellent inhibition performance can still be kept under high-temperature and high-salt conditions, stratum damage is reduced, and the application requirements in complex environments of oil fields are met.

The present invention provides an encapsulated composition comprising at least one core-shell microcapsule, wherein the at least one core-shell microcapsule comprises a core comprising at least one benefit agent and a shell surrounding the core, wherein the shell comprises:a) a polymeric stabilizer that is formed by combination of a bio-based polymeric surfactant with at least one aminosilane;b) a bio-based and biodegradable hydrocollolid; andc) a linker derived from a bio-based and biodegradable epoxy resin.The invention also provides a method for preparing the encapsulated composition, a consumer product comprising the encapsulated composition and the use of the encapsulated composition to improve the perception or enhance the performance of the benefit agent in a consumer product.

COSMETIC COMPOSITIONS WITH IMPROVED WEAR AND TRANSFER RESISTANCE A cosmetic composition may be used to improve wear and transfer resistance. The cosmetic composition may include (i) a hydrogel dispersion in oil, the hydrogel having an ethylenic polymer core, and (ii) a transfer-resistant film-forming material, (iii) a hydrophilic active agent incorporated into the ethylenic polymer core, or (iv) both (ii) and (iii). The dispersion may include a plurality of ethylenic polymer core particles dispersed in an oily substance that is liquid at 20 °C and 1 atmosphere and also includes a polymer stabilizing agent. Figure for abbreviation: none

The present invention relates to a method for manufacturing pellets in a pelletizer, the method comprising the steps of: (a) pressing a compacted mixture by a roller through a nozzle to obtain a strand, and (b) crushing the strand to obtain a pellet, wherein the compacted mixture comprises (i) 87-97 weight % of a polymer stabilizer, which is tris(2,4-di-tert-butylphenyl) phosphite (CAS-No.31570-04-4), and (ii) 3-13 weight % of a processing aid, which is a propylene-ethylene copolymer and has a melting enthalpy of less than 100 J / g at 101.32 kPa. The pellets can be used to manufacture dust-free processing of the polymer stabilizer in a stabilized polymer. In addition, a method for stabilizing a polymer is disclosed, the polymer being a polyolefin, polystyrene, or a mixture thereof, comprising adding the pellets to the polymer.

The present invention relates to an oily dispersion (A) comprising i) at least one particle consisting of an ethylenic polymer, ii) at least one polymeric stabilizer comprising a (C9-C22)alkyl group, and iii) at least one hydrocarbon-based fatty substance which is liquid at 20° C. and 1 atmosphere. The invention also relates to a process for treating keratin materials, notably human keratin materials such as the skin or the hair, involving the application to said materials of at least one oily dispersion (A); to a process for preparing the oily dispersion, and to a multi-compartment kit comprising ingredients i) to iii).The oily dispersion (A) and the process for treating keratin materials as defined above make it possible to obtain a treatment for said materials which is notably resistant to shampoo washing, to sebum, to sweat and / or to water, but also to fatty substances, notably dietary fatty substances such as oils.

The invention relates to the technical field of biological and pharmaceutical preparations, and discloses an AS04 adjuvant composition for a vaccine as well as a preparation method and application of the AS04 adjuvant composition. The preparation method comprises the following steps: preparing 3-O-deacyl-4 '-monophosphoryl lipid A A polymer stabilizer; squalene; the preparation method comprises the following steps: S1, carrying out mixed adsorption on 3-O-deacyl-4'monophosphoryl lipid A and aluminum hydroxide, so as to prepare an adjuvant base core; s2, squalene and alpha-tocopherol are mixed and dissolved, and an oil phase premix is prepared; s3, dropwise adding the oil phase premix into the adjuvant-based core suspension under a low shearing force; s4, adding a polymer stabilizer solution into the mixture to carry out polymer coating; and S5, freeze-drying the final mixture. By sequentially constructing a multi-layer protection structure, the AS04 adjuvant is endowed with excellent freeze-drying stability, rapid redissolving performance and antigen activity protection effect.

The present invention relates to polyether polydimethylsiloxanes useful as stabilizers for polymer foams, such as polyurethane foams. It was found that polyether polydimethylsiloxane can be prepared based on the compound obtained in the recovery process. Therefore, the invention provides a method for preparing polyether polydimethylsiloxane based on recycled linear polydimethylsiloxane. The invention also relates to methods and compositions for making polymer foams using the polyether polydimethylsiloxane, and articles made therefrom. The invention also relates to the use of a composition containing recovered polydimethylsiloxane, and to the use of the polyether polydimethylsiloxane as a foam stabilizer.

The invention relates to a process for preparing a polyisoolefin homo- or copolymer, preferably selected from butyl rubber, polyisobutylene and poly(isobutylene-co-para methyl styrene), the process comprising the step of polymerizing at least one isoolefin monomer and optionally at least one copolymerizable monomer, preferably multiolefin monomer, in the presence of a preformed polymeric stabilizer. The preformed polymeric stabilizer comprises repeating units derived from styrene and repeating units having pendant linear or branched saturated alkyl groups with at least 3 carbon atoms. Preferably, the repeating units with the pendant alkyl groups are derived from monoterpenes, especially myrcene or ocimene, or sesquiterpenes, especially farnesene, and subsequently hydrogenated. The preformed polymeric stabilizer advantageously stabilizes the slurry of the polyisoolefin homo- or copolymer, preferably selected from butyl rubber, polyisobutylene and poly(isobutylene-co-para methyl styrene), that is formed during polymerization in a solvent.

The present invention relates to a polycarbodiimide composition, in particular comprising a specific polycarbodiimide and a reduced amount of P. The invention also relates to a method for producing the polycarbodiimide composition. The polycarbodiimide compositions can be used as stabilizers for polymers, in particular as hydrolytic stabilizers for thermoplastic polyurethane compositions. Furthermore, the present invention relates to a process for the preparation of a polycarbodiimide composition, a polycarbodiimide composition obtainable or obtained by said process.

The present invention relates to a polycarbodiimide composition, particularly comprising a specific polycarbodiimide and a small amount of P. The polycarbodiimide composition can be used as a stabilizer for polymers, particularly as a hydrolysis stabilizer for thermoplastic polyurethane compositions. Furthermore, the present invention relates to a process for preparing the polycarbodiimide composition, and a polycarbodiimide composition obtainable or obtainable by said process.

In one aspect, a method for forming a foamable polypropylene extrusion mixture includes providing a polypropylene resin and blending a nucleating agent, a polymer stabilizer, and a physical blowing agent with the polypropylene resin. In another aspect, a method for forming a foamable polypropylene extrusion mixture includes providing a polypropylene resin and blending a nucleating agent, a polymer stabilizer, a physical blowing agent, and a chemical foaming agent with the polypropylene resin. In further aspects, a foamable polypropylene extrusion mixture and foam articles are provided. The foamable polypropylene extrusion mixtures are extrudable to form a polypropylene foam sheet or web which is thermoformable to produce a polypropylene foam packaging tray having superior rigidity and puncture resistance.

The invention relates to the technical field of semiconductor surface engineering, in particular to a method and a device for growing nanorods on the surface of a quartz piece. The method for growing the nanorods on the surface of the quartz piece comprises the following steps: putting the cleaned quartz piece into a mixed solution formed by a polymer stabilizer, an alcohol solvent, a salt stabilizer aqueous solution, a catalyst and ethanol for 10-60 minutes, so that emulsion droplets are adsorbed on the surface of the quartz piece; dropwise adding a silicon dioxide precursor into the mixed solution, and reacting the emulsion droplets with the silicon dioxide precursor to obtain the quartz piece with the nano-columns on the surface. The appearance and density of the nano-columns on the surface of the quartz piece can be regulated and controlled, and the adhesive force of the surface of the quartz piece is improved.

The invention relates to a method for manufacturing a pellet in a pellet mill, which method comprises the steps of (A) pressing a mixture for compaction by a roller through a nozzle to obtain a strand, and (B) comminuting the strand to obtain the pellet, wherein the mixture for compaction comprises (i) 87 to 97 wt. % of a polymer stabilizer mixture polymer stabilizer mixture, which comprises the polymer stabilizers (i-1) 21 to 29 wt. % of tris(2,4-ditert-butylphenyl) phosphite (CAS-No. 31570-04-4), (i-2) 21 to 29 wt. % of tetrakis-[3-(3,5-ditert-butyl-4-hydroxy-phenyl)-propionyloxymethyl]methane (CAS-No. 6683-19-8), (i-3) 8 to 12 wt. % of a C16-C18 fatty acid calcium salt, (i-4) 36 to 44 wt. % of a calcium oxide, and wt. % of the polymer stabilizers (i-1), (i-2), (i-3) and (i-4) are based on the weight of the polymer stabilizer mixture, and (ii) 3 to 13 wt. % of a processing aid, which is a propylene-ethylene copolymer and which possesses a melting enthalpy below 100 J / g at 101.32 kPa. The pellet is useful for a dust-free handling of its polymer stabilizer mixture at a manufacturing of a stabilized polymer. Furthermore, a method for stabilizing a polymer, which is a polyolefin, a polystyrene or a mixture thereof, is disclosed, which comprises the dosing of the pellet to the polymer.

The invention belongs to the technical field of synthesis of propylene acetate, and discloses a supported catalyst, a preparation method thereof and a method for synthesizing propylene acetate by using the supported catalyst. The preparation method comprises the following steps: mixing and dispersing a metal palladium source, a metal copper source, a polymer stabilizer and a solvent to prepare a metal precursor solution; after a carrier is treated with alkali liquor, a metal precursor solution is sprayed to the surface of the carrier; then carrying out reduction treatment under the action of a reducing agent; and finally, dipping by adopting an acetate solution to prepare the supported catalyst. The polymer stabilizer is selected from at least one of polyvinyl alcohol, polyimide, carboxymethyl cellulose sodium, polyethyleneimine, polyacrylic acid and polymethyl methacrylate. The supported catalyst for synthesizing allyl acetate provided by the invention has high catalyst activity, can improve the utilization rate of noble metals, the conversion rate of reactants and the selectivity of reaction products, and reduces the synthesis cost of allyl acetate.

In one aspect, a method for forming a foamable polypropylene extrusion mixture includes providing a polypropylene resin and blending a nucleating agent, a polymer stabilizer, and a physical blowing agent with the polypropylene resin. In another aspect, a method for forming a foamable polypropylene extrusion mixture includes providing a polypropylene resin and blending a nucleating agent, a polymer stabilizer, a physical blowing agent, and a chemical foaming agent with the polypropylene resin. In further aspects, a foamable polypropylene extrusion mixture and foam articles are provided. The foamable polypropylene extrusion mixtures are extrudable to form a polypropylene foam sheet or web which is therm of ormable to produce a polypropylene foam packaging tray having superior rigidity and puncture resistance.

Solid pharmaceutical formulations including AZD4635 are described. The solid formulations can include a polymeric stabilizer (e.g., a polyvinylpyrollidone), an ionic surfactant (e.g., sodium docusate), and a non-ionic surfactant (e.g., a poloxamer).

The present invention provides a composition for manufacturing liraglutide-containing microneedles that contains liraglutide as an active ingredient, without denaturation of the active ingredient during manufacture, and maintains stability even after manufacture, and liraglutide-containing microneedles with enhanced stability manufactured using the composition. The composition for manufacturing liraglutide-containing microneedles according to the present invention uses a specific combination of a biodegradable polymer, a stabilizer and an antioxidant to prevent the denaturation of the active ingredient liraglutide during the manufacture of microneedles and to ensure that the stability of liraglutide is maintained after the manufacture of microneedles.