1344 results about "Comonomer" patented technology

The invention discloses a hydrophilic polyacrylate / epoxy silica sol composite coating and a preparation method thereof. The composite coating is prepared from a polyacrylate epoxy silica sol solution containing carboxyl and a polyethylene glycol side chain through blending, coating, drying and heating crosslinking. The polyacrylate is synthesized by taking methyl methacrylate, methacrylic acid, hydroxyethyl methylacrylate and allyl polyethylene glycol as comonomers through a solution free radical copolymerization method, and the epoxy silica sol solution is prepared by taking tetraethoxysilane and gamma-glycidoxypropyltrimethoxysilane as raw materials through a solution polymerization method. The composite material is prepared through a sol-gel and core-shell preparation process. The preparation method comprises the following steps: carrying out solution blending on polyacrylate and epoxy silica sol, and carrying out coating, drying and other processes to generate the cross-linked polyacrylate / epoxy silica sol composite coating through a cross-linking reaction between carboxyl and epoxy. The prepared composite coating has the characteristics of long durability, wear resistance, hydrophilicity, antifogging, protein adsorption resistance and the like.

The specification relates to a wash-off label (100, 200) comprising a face (101, 301) and a pressure sensitive adhesive (102, 302) adjoined to the face, wherein the face (101, 301) comprises corona discharged filmic material and the pressure sensitive adhesive (102, 302) has a composition including at least one acrylic polymer comprising acrylic monomer(s) and / or non-acrylic comonomer(s) having a carbonyl group capable of undergoing a crosslinking reaction, amount of the acrylic monomer(s) and / or non-acrylic comonomer(s) having a carbonyl group capable of undergoing a crosslinking reaction being from 0.1 to 5 wt. % of monomer composition, and a crosslinking agent with dihydrazide functionality, amount of the crosslinking agent being from 20 to 150% with respect to the amount of the carbonyl groups capable of undergoing a crosslinking reaction. The wash-off label (100, 200) is detachable from a surface when exposed to an alkaline washing solution at a temperature of 85 degrees C. the detachability being such that the pressure sensitive adhesive (102, 302) remains attached to the face (101, 301). Further, the specification relates to a labelled item and use of the wash-off label for labelling an item. Still further, the specification relates to a label laminate web and a method of manufacturing the wash-off label as well as to a pressure sensitive adhesive composition for a wash-off label.

The present application relates to the technical field of lithium battery materials and binders, and discloses an aqueous polymeric binder, a preparation method therefor and a use thereof. The aqueous polymeric binder is obtained by copolymerizing a polymerization unit comprising an acrylic monomer, an acrylate monomer, an oil-soluble monomer, a water-soluble monomer, and an amphiphilic water-soluble monomer in an aqueous solvent; and the mass percentages of the monomers are as follows: acrylic monomer: 5%-15%; acrylate monomer: 45%-60%; oil-soluble monomer: 10%-40%; water-soluble monomer: 5%-20%; and amphiphilic water-soluble monomer: 5%-10%. The aqueous polymeric binder of the present application is mainly used for bonding of an edge coating of a negative electrode sheet of a lithium-ion battery; on the basis of the specific copolymerization monomer components and proportions, the obtained binder has excellent PP base film bonding performance and electrolyte swelling resistance; in addition, the binder avoids material mixing with a negative electrode, and has good prospects of application.

The invention provides a perfluoroether rubber sealing element and a preparation method thereof, and the preparation method comprises the following steps: taking tetrafluoroethylene and perfluoroalkyl vinyl ether as comonomers, and carrying out emulsion polymerization under the condition of a vulcanization point monomer and a chain transfer agent to obtain raw perfluoroether rubber; the preparation method comprises the following steps: mixing the raw perfluoroether rubber, the carboxyl fluorinated modified carbon nanotubes, a filler, a vulcanizing agent and an accelerant, and performing first-stage vulcanization and second-stage vulcanization to obtain the perfluoroether rubber sealing element. According to the perfluoroether rubber sealing element and the preparation method thereof provided by the invention, the compressive deformation resistance of the perfluoroether rubber sealing element is improved by adding the carboxyl fluorinated modified carbon nanotubes, so that the sealing element is ensured to meet the sealing requirement of semiconductor equipment.

The invention discloses photocuring conductive hydrogel as well as a preparation method and application thereof. According to the invention, methacryloylethyl sulfobetaine (SBMA), acrylic acid (AA) and hydroxyethyl methylacrylate (HEMA) are used as comonomers, deionized water is used as a solvent, N, N '-methylenebisacrylamide (MBAA) is used as a cross-linking agent, ammonium persulfate (APS) is used as an initiator, tetramethylethylenediamine (TEMED) is used as an accelerator, and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methyl propiophenone (Irgacure2959) is used as a photoinitiator; the conductivity is improved by adding an ionic compound potassium chloride (KCl), and the photocuring conductive hydrogel is prepared in a free radical polymerization manner by adopting an LED-UV curing box. The conductive hydrogel disclosed by the invention has the characteristics of good adhesion property, conductivity, mechanical property and the like, and has wide application in the fields of wearable strain sensors and other flexible electronics.

The invention discloses supercritical fluid foaming polyimide wave-absorbing foam and a preparation method thereof.The thermoplastic polyimide is prepared by the steps that aromatic dianhydride, aromatic diamine and aliphatic diamine serve as comonomers, polyimide acid is generated through solution polymerization, and then high-temperature cyclization is conducted; wherein the mole number of the aliphatic diamine accounts for 10-50% of the total mole number of the diamine, and the free volume and glass transition temperature of a molecular chain are effectively regulated and controlled by introduction of the aliphatic diamine; the wave-absorbing foam is prepared by taking polyimide as a matrix, doping 1-20wt% of wave-absorbing filler, and foaming for 1-3 hours in a supercritical carbon dioxide or nitrogen environment at the temperature of 180-220 DEG C and the pressure of 9-25MPa, through molecular structure design, the adsorption capacity and impact resistance of polyimide to carbon dioxide are remarkably improved, and the prepared foam has the advantages of light weight, high porosity, uniform foam structure and excellent heat resistance, can realize effective electromagnetic wave absorption in an X wave band, and is suitable for the fields of aerospace stealth and electromagnetic compatibility protection.

The invention belongs to the technical field of propylene polymerization, and particularly relates to a catalyst for olefin polymerization, an isotacticity-adjustable propylene polymer containing an ultra-high molecular weight polypropylene component and a production method of the isotacticity-adjustable propylene polymer, and the method comprises the following steps: in the presence of hydrogen and a polymerization catalyst, propylene or propylene reacts with one or more optional comonomers; at least one part of the obtained material flow containing the polypropylene component I is continuously subjected to polymerization reaction for 0.05-3.0 hours in a pipeline positioned outside the reactor or a subsequent reactor connected with the pipeline in series and in the presence of a mixture DH of a hydrogenation catalyst and an external electron donor; a propylene polymer product containing 0.03 wt%-15.0 wt% of an ultra-high molecular weight polypropylene component is obtained; the molar ratio of the hydrogenation catalyst to the total amount of hydrogen is 1 / 10000 to 1 / 100. According to the invention, the polypropylene product containing the ultra-high molecular weight component with lower content is prepared, and the isotacticity of the ultra-high molecular weight polypropylene component can be flexibly adjusted.

The invention provides a macromolecular agglomerant and a preparation method thereof. The high-molecular agglomerant takes 1, 3-butadiene as a main polymeric monomer and alpha, beta-unsaturated acid as a comonomer, and assistants comprise an emulsifier, an initiator and deionized water. The macromolecular agglomerant is used for further preparing large-particle-size polybutadiene latex and polyacrylate latex, the components are simple, introduction of more new monomers is reduced, the stability of the latex in the agglomeration process is improved, then ABS and ASA resin is prepared, the impact resistance and tensile property of the ABS and ASA resin are improved, and particularly the impact resistance under the low-temperature working condition is improved.

A submarine cable core comprising a conductor which is surrounded by at least an inner semiconductive layer, an insulation layer and an outer semiconductive layer in that order; wherein said insulation layer comprises: a low density polyethylene homopolymer or low density polyethylene copolymer with at least one polyunsaturated comonomer and optionally one or more further comonomers; and, a copolymer comprising at least one polar comonomer selected from the group consisting of an alkyl acrylate, an alkyl methacrylate or vinyl acetate, wherein the amount of polar monomer units in the insulation layer is from 1 to 150 micromol per gram based on the total amount of polymer components in the insulation layer.

The invention discloses flame-retardant anti-fouling copolymer nylon 6 and a preparation method and application thereof, and the preparation method comprises the following steps: adding a phosphorus-containing flame-retardant monomer, a silicon-containing reaction monomer, lactam, an initiator and a catalyst into a polymerization reaction kettle, and introducing nitrogen to replace air in the kettle; under the protection of nitrogen, firstly raising the temperature to 180-220 DEG C to carry out prepolymerization reaction, and then raising the temperature to 240-260 DEG C to carry out polymerization reaction; and after the polymerization reaction, removing water vapor in the system to react in a normal pressure state, then vacuumizing to react, filling nitrogen to recover to normal pressure after the reaction is finished, and discharging and cooling to obtain the flame-retardant and anti-fouling copolymer nylon 6. The phosphorus-containing comonomer and the silicon-containing comonomer are introduced into the copolymerized nylon, the intrinsic flame-retardant nylon material with high flame-retardant efficiency and permanent flame retardance is prepared through melt copolymerization at a relatively low introduction amount, and the intrinsic flame-retardant nylon material has certain hydrophobic and anti-fouling properties and also retains good mechanical properties and spinnability of the nylon material.

The invention discloses an antifouling wear-resistant auxiliary agent and a preparation method and application thereof, and belongs to the technical field of fluorine-containing functional preparations, the antifouling wear-resistant auxiliary agent is prepared from the following raw materials by mole: 1-2 parts of single-ended active perfluoropolyether alcohol PFPE-OH; 1 to 2 parts of isophorone diisocyanate; 1 part of nano silicon dioxide containing hydroxyl groups on the surface; 2 to 5 parts of monoisocyanate containing unsaturated bonds; 2 to 25 parts of acrylic acid hydroxyl ester; 40 to 400 parts of a comonomer; 2-20 parts of a reaction active monomer; the reactive monomer contains an unsaturated bond and is used for side chain grafting. The antifouling wear-resistant auxiliary agent comprises a nano silicon dioxide hybrid multi-branched polymer containing a perfluoropolyether group, contains a plurality of unsaturated sites, is suitable for a UV curing coating system, and can significantly improve the antifouling and anti-fingerprint characteristics and wear resistance of the surface of a coating.

The invention relates to the technical field of hydraulic fracturing exploitation of deep / ultra-deep oil and gas reservoirs, and discloses a gel-coated temporary plugging agent and a preparation method and application thereof.The gel-coated temporary plugging agent comprises a proppant inner core and a degradable gel shell coating the outer surface of the proppant inner core; the degradable gel shell is formed by a gel shell gelling solution, the gel shell gelling solution comprises small-molecule comonomers and a degradable cross-linking agent, and the small-molecule comonomers comprise acrylamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide, N, N-dimethylformamide the initiator is one or more of N, N-dimethylacrylamide, acrylic acid, hydroxyethyl acrylate, benzyl acrylate, 2-propyl acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-vinyl pyrrolidone; and the initiator is one or more of N, N-dimethylacrylamide, acrylic acid, hydroxyethyl acrylate, benzyl acrylate, 2-propyl acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and N-vinyl pyrrolidone. The gel-coated temporary plugging agent can be used for effectively plugging in a fracturing time period at high temperature / ultrahigh temperature, and the flow conductivity of fractured cracks can be enhanced by exposing an internal propping agent after the gel-coated temporary plugging agent is degraded.

The invention discloses a copper-based current collector modified by a self-repairing artificial interface layer, a preparation method of the copper-based current collector and application of the copper-based current collector in a negative-electrode-free lithium battery. According to the self-repairing artificial interface layer, an ionomer with a self-repairing function is prepared from a nitrogen-containing water-soluble comonomer, a quaternary ammonium salt monomer, double-bond-terminated polyoxyethylene and a dopamine self-repairing monomer in a solution polymerization mode, and the ionomer with the self-repairing function is prepared into a solution to serve as an electrophoresis solution; and depositing the ionomer on the exposed copper-based current collector by adopting an electrophoretic deposition method. The artificial interface layer obtained by the method is compact and uniform, the thickness is adjustable, and the effects of accelerating lithium ion transmission, homogenizing lithium deposition, self-repairing and the like can be achieved. When the copper-based current collector modified by the self-repairing artificial interface layer is used for the negative-electrode-free lithium battery, the cycle life of the copper-based current collector is obviously prolonged, and a new solution is provided for developing the high-performance negative-electrode-free lithium battery.

The invention relates to a foamable composition, biodegradable PMI (polymethacrylimide) foam and a preparation method thereof. The foamable composition comprises comonomers, an initiator, a foaming agent and a cross-linking agent, the comonomers comprise a first comonomer and a second comonomer, the first comonomer is selected from one or two of methacrylonitrile or acrylonitrile, and the second comonomer is selected from methacrylic acid; the composition also comprises a degradation agent, and the degradation agent is selected from one or a combination of more than two of polylactic acid, starch-based polyether polyol and polycaprolactone; the weight ratio of the degradation agent to the comonomer is (30-132): 180. According to the foamable composition disclosed by the invention, the biodegradation rate of the PMI foam is improved and the original high performance of the PMI foam is reserved by scientifically adding the degradation agent and adjusting the formula and adopting an in-situ polymerization technology.

The invention relates to the technical field of fertilizer slow release, and discloses a temperature-responsive starch-based gel coated slow-release fertilizer, which comprises the following raw materials: amorphous starch: a starting material is common corn starch; the cross-linking agent is N, N '-methylene bisacrylamide (MBA); n-isopropylacrylamide (NIPAM) is used for endowing the gel with temperature responsiveness; acrylamide (AM): as a comonomer to improve gel performance; the urea is used as a core component of the slow-release fertilizer; the absolute ethyl alcohol is used for wetting the surface of urea and promoting uniform coating of the SNA powder. According to the invention, the gel can automatically adjust the internal microporous structure according to different soil temperatures, so as to accurately control the release rate of nutrients, effectively solve the problem that the traditional slow release fertilizer cannot dynamically adjust the nutrient release according to the environmental change, and meet the differentiated demands of plants for nutrients in different growth stages.

The invention discloses a preparation method and application of ABS (Acrylonitrile Butadiene Styrene) grafted latex. The ABS grafted latex comprises polybutadiene latex, a comonomer, an emulsifier and an initiator. By controlling the type of the emulsifier, the stability of the MMA in the emulsion graft polymerization reaction process is improved, so that the production process of the ABS graft latex has better process continuity, the deslagging amount in the production process is obviously reduced, and when the transparent ABS resin is further prepared, the finished product has a lower haze level.

The application discloses a cross-linked ETFE composite film with gradient ultraviolet shielding function and a preparation method and application thereof, and belongs to the technical field of ETFE film preparation. The cross-linked ETFE composite film is composed of three layers of a surface layer, a middle layer and a bottom layer. The surface layer material comprises ETFE resin and fluorinated carbon quantum dots; the middle layer material comprises ETFE resin, allyl-containing comonomer A and phenyl-containing comonomer B; and the bottom layer material comprises ETFE resin and CeO2 nanowires. The fluorinated carbon quantum dots have a particle size of 3-5 nm and contain a -C4F9 structure. The comonomer A is an allyl-containing fluorine olefin monomer, and the comonomer B is a phenyl-containing organic fluorinated compound. Through the synergistic effect of the surface layer self-migration fluorinated carbon quantum dots, the middle layer copolymerization modification and the bottom layer CeO2 nanowires, high light transmittance, full-waveband ultraviolet shielding and long-term weather resistance are achieved.

In order to solve the problems of non-uniform dispersion, poor coating fluidity and insufficient peel strength of negative electrode prime coat slurry in the prior art, the invention provides a binder, binder slurry, a preparation method of the binder slurry, current collector prime coat slurry and a negative electrode plate. The binder is of a core-shell structure and comprises an inner core layer, a middle layer and an outer shell layer, and comonomers of the inner core layer comprise olefin monomers, aromatic vinyl monomers and unsaturated amide monomers; comonomers of the middle layer comprise olefin monomers, aromatic vinyl monomers and unsaturated ester monomers; comonomers of the outer shell layer comprise olefin monomers, sulfonic acid monomers, alcohol ether monomers and acrylic acid monomers. The adhesive provided by the invention is beneficial to generation of a bonding interface and a dispersion acting force interface, and meanwhile, the peel strength of the adhesive is improved; in addition, ether alcohol monomers are added into the shell layer, so that the surface tension of particles in the binder is reduced, the particles can more easily infiltrate conductive agent particles, and the high dispersion effect is achieved.

The invention belongs to the technical field of propylene polymerization, and particularly relates to a propylene polymer containing ultra-high molecular weight components and a preparation method thereof. The method comprises the following steps: (i) in the presence of a polymerization catalyst and hydrogen, propylene or propylene and a comonomer are subjected to a first-stage (co) polymerization reaction for 0.1-10 hours to prepare a material flow containing a polypropylene-I component; (ii) after the first polymerization reaction is finished, reducing the amount of hydrogen to 20 wt% or below of the initial amount through separation treatment and / or replacement treatment; then a hydrogenation catalyst is introduced, and polymerization reaction is continued for 0.01-3 hours; stopping the reaction to obtain the propylene polymer containing the ultra-high molecular weight polypropylene component; the molar ratio of the hydrogenation catalyst to the residual hydrogen is 1 / 10000 to 1 / 100. According to the prepared polypropylene containing the ultra-high molecular weight component, the melt strength is remarkably improved, and meanwhile, the mechanical property, the processability and the like of the polypropylene are obviously improved.

The invention relates to the technical field of high polymer materials, and discloses a high-durability pressure-sensitive adhesive with low VOCs release and a preparation method thereof.The high-durability pressure-sensitive adhesive is prepared from, by weight, 50-80 parts of acrylate copolymer, 0.5-5 parts of cross-linking agent, 10-30 parts of tackifying resin, 1-10 parts of inorganic filler, 0.1-2 parts of antioxidant and 20-50 parts of solvent. Wherein the tackifying resin is at least one of hydrogenated petroleum resin and glycerol ester of rosin, and the inorganic filler is one of nanoscale silicon dioxide and calcium carbonate. Butyl acrylate is used as a main monomer, 2-ethylhexyl acrylate is used as a comonomer, acrylic acid is used as a functional monomer, benzoyl peroxide is used as an initiator, free radical polymerization is carried out at the temperature of 60-85 DEG C under the protection of nitrogen for 4-8 hours, and a copolymer chain with the molecular weight distribution index (PDI) smaller than or equal to 2.5 is formed, so that the viscosity and elasticity of colloid can be balanced; the peeling strength and the weather resistance are improved, and the colloid is prevented from being too soft or embrittled.

The invention discloses a method for producing multimodal polyethylene through series connection of multiple reactors, and belongs to the field of olefin polymerization. The low-molecular-weight or medium-molecular-weight ethylene polymer is produced through polymerization in the first reactor, the obtained product enters the intermediate treatment unit to remove hydrogen, and then part of the product is shunted to enter the second reactor to be mixed with the ultra-high-molecular-weight ethylene polymer produced through ethylene polymerization in the second reactor; all polymers of the second reactor are returned to the intermediate treatment unit, and the rest products after hydrogen removal enter a third reactor and are mixed with high-molecular-weight ethylene polymers generated by copolymerization of ethylene and comonomers in the third reactor to generate multimodal polyethylene. The multimodal polyethylene produced by the method is wide in molecular weight distribution, and the molecular weight of ultra-high molecular weight polyethylene is flexible to regulate and control. According to the invention, material circulation between the third reactor and the second reactor is adopted, molecular chain-level mixing among the components is achieved, the compatibility is good, and the mechanical property is more excellent.

The invention relates to a dry-jet wet-spinning ultra-high-performance polyacrylonitrile-based carbon fiber and a preparation method thereof, and belongs to the technical field of carbon fibers. A preparation method of dry-jet wet-spinning ultra-high-performance polyacrylonitrile-based carbon fiber comprises the following steps: S1, mixing acrylonitrile, a comonomer, a chain transfer agent, an initiator and a solvent, carrying out polymerization reaction through a solvent dropwise addition method, and preparing a spinning solution; wherein the comonomers comprise a first comonomer, a second comonomer and a third comonomer; s2, the spinning solution is subjected to solidification, water washing, water drawing, oiling, drying and steam drawing, and precursor fibers are obtained; s3, the precursor fiber is sequentially subjected to pre-oxidation, low-temperature carbonization, high-temperature carbonization, graphitization, surface treatment, sizing and drying, and the ultra-high-performance polyacrylonitrile-based carbon fiber is prepared. Wherein the pre-oxidation adopts four-stage pre-oxidation treatment. The strength and modulus of the carbon fiber can be effectively and synergistically optimized, and the carbon fiber with high strength and high modulus is prepared.

The invention provides a low-melting-point PET short fiber, and relates to the technical field of fiber production. The low-melting-point PET short fiber comprises a high-strength low-melting-point PET short fiber, the short fiber is of a skin-core composite structure, a skin layer of the skin-core composite structure is modified low-melting-point polyester and is prepared by melt copolymerization of PET, 10-30% of rigid comonomers and 5-15% of flexible chain segments, the melting point is 110-160 DEG C, and the glass-transition temperature (Tg) is larger than or equal to 60 DEG C. The gradient interface enhancement technology is adopted, the PET-g-PE grafting layer is introduced between the skin layer and the core layer, the grafting rate reaches 5-8% through melt blending, a transition layer of 1-3 microns is formed, the peel strength is improved to 1.5 N / cm or above, and the problem of interface stripping of traditional composite fibers is solved.

The invention relates to a carbon fiber spinning solution and a preparation method thereof, belongs to the field of fiber materials, and solves at least one of the problems in the prior art that the molecular weight is difficult to increase, the molecular weight distribution is relatively wide, the viscosity and molecular weight of different batches are unstable and the like. The preparation method of the carbon fiber spinning solution comprises the following steps: adding a material containing acrylonitrile, a comonomer and a solvent into a polymerization device; carrying out demonomerization treatment on the acrylonitrile-based polymer liquid meeting the target molecular weight; and carrying out ammoniation treatment on the acrylonitrile-based polymer liquid subjected to demonomerization treatment. The viscosity and molecular weight stability of different batches of polymerization liquids are improved, a high-molecular-weight polymerization stock solution can be obtained, and the molecular weight distribution width is reduced.

The invention provides a preparation method of biomass high-water-absorption gel with bamboo powder as a raw material. The preparation method of the biomass high-water-absorption gel with the bamboo powder as the raw material comprises the following steps that firstly, 60-mesh bamboo powder is mixed with water, ultrasonic treatment is conducted for 1 min, and a bamboo powder mixed solution is prepared; 2, 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and acrylic acid (AA) are used as comonomers, and a sodium hydroxide solution is used for neutralization; and 3, uniformly mixing the neutralized monomer with the bamboo powder mixed solution, adding an initiator and a cross-linking agent, carrying out ultrasonic mixing dispersion for 1 min, introducing nitrogen for sweeping and blowing, and carrying out a reaction in an oil bath pan at 60 DEG C for about 20 min so as to obtain the high-water-absorption gel. The prepared super absorbent gel can effectively adsorb moisture, the adsorption capacity of the super absorbent gel to moisture at the room temperature can reach 1047 g / g at most, the bamboo powder is used as the raw material, the production cost is reduced, and the super absorbent gel has good application prospects.

The invention relates to a thermoplastic molding composition (P) comprising: (A) thermoplastic polymer composition (A) comprising: (A-1) 10 to 50 wt.-% of graft copolymer (A-1), (A-2) 1 to 50 wt.-%, of thermoplastic polymer matrix (A-2) based on one or more vinylaromatic copolymers, (A-3) 20 to 50 wt.-%, of polymerized alkyl methacrylate component (A-3), and (A-4) 0 to 45 wt.-% of comonomer which is copolymerized with the at least one polymerized alkyl methacrylate component (A-3), where the sum of (A-1), (A-2), (A-3) and optional comonomers (A-4) is 83.2 to 99.8 wt.-%; (B) a hindered amine light stabilizer composition (B), comprising at least two of substances (B-1) to (B-3): (B-1) 0 to 0.9 wt.-%, of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure (B-2) 0 to 0.9 wt.-%, of a hindered amine light stabilizer mixture having a monopiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the monopiperidine structure, and (B-3) 0 to 2 wt.-%, of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups with at least one alkyl group at each of the 2 and 6 positions of the piperidine groups (C) 0 to 5 wt.-%, of one or more further additives (C), different from (B); and (D) 0 to 10 wt.-%, of colorants, dyes and / or pigments (D), different from (C); wherein the constituents (A) to (D) sum up to 100 wt.-% of the molding composition (P).

The invention relates to a polypropylene material and a preparation method thereof, and discloses a high molecular weight propenyl elastomer toughened polypropylene blend composite material and a preparation method thereof. The preparation method comprises the following steps: toughening polypropylene by using a high-molecular-weight propenyl elastomer; the high-molecular-weight propenyl elastomer is prepared from propylene monomers and comonomers (one or more of 1-butene, styrene, 1-hexene, 1-octylene, 1-decene and the like) through a quinoline amino binuclear metal hafnium catalyst and co-catalysts (tri-pentafluorophenyl boron, triphenylcarbonium tetra (pentafluorophenyl) borate, aluminoxane, aluminum alkyl and the like). And one or more of alkyl aluminum chloride and the like). According to the present invention, the polypropylene-based blend composite material has characteristics of PP toughness improving, excellent strength and excellent rigidity maintaining, and excellent low temperature toughness, specifically, after the toughening modification, the normal temperature (25 DEG C) toughness and the low temperature (-25 DEG C) toughness of the polypropylene-based blend composite material are significantly improved, and the tensile strength change is not significant. Therefore, the invention has original innovation, and provides a new direction for the development of the field of polyolefin materials.

The invention belongs to the field of additives, and provides a polycarboxylate superplasticizer as well as a preparation method and application thereof. The preparation method of the polycarboxylic acid water reducer comprises the following steps: in the presence of water, an initiator and a chain transfer agent, comonomers including a polyether macromonomer, unsaturated carboxylic acid, unsaturated amide and a functional monomer are subjected to a polymerization reaction to form polycarboxylic acid, and the functional monomer is an esterification product of rhamnolipid and unsaturated alcohol. The polycarboxylate superplasticizer provided by the invention has improved workability while maintaining a relatively high water-reducing rate.

The invention discloses a plant-based deodorant and a preparation method thereof, and relates to the technical field of high polymer materials. When the plant-based deodorant is prepared, beta-cyclodextrin reacts with paratoluensulfonyl chloride and then reacts with ethylenediamine, and amino modified cyclodextrin is prepared; the plant-based extract is subjected to inclusion with amino modified cyclodextrin, and a cyclodextrin inclusion compound is prepared; the preparation method comprises the following steps: reacting hydroxyethyl cellulose with methacrylic anhydride to prepare double-bond modified cellulose; carrying out hydrothermal reaction on titanium sulfate, the carboxylated multi-walled carbon nanotube, ammonium fluoride and cerous nitrate to prepare a co-doped titanium dioxide / carbon nanotube; coating the co-doped titanium dioxide / carbon nano-tubes with oleic acid to prepare modified nano-particles; and reacting the double-bond modified cellulose with the cyclodextrin inclusion compound, and then copolymerizing with the modified nanoparticles and the comonomer to obtain the plant-based deodorant. The prepared plant-based deodorant has the advantages of good deodorization effect, slow release and photocatalytic degradation.

The present invention relates to a vinyl pyrrolidone copolymer of N-vinyl pyrrolidone and a maleic acid comonomer wherein the vinyl pyrrolidone copolymer is functionalized with a benzophenone substituent (BP) wherein the amount of maleic acid in the vinyl pyrrolidone copolymer is less than 1 mol%, preferably from 0.1 to 0.95 mol%, further preferably from 0.1 to 0.90 mol%, more preferably from 0.1 to 0.85 mol%, more preferably from 0.2 to 0.88 mol%, and the amount of N-vinyl pyrrolidone is less than 1 mol%, preferably from 0.1 to 0.95 mol%, further preferably from 0.1 to 0.90 mol%, more preferably from 0.1 to 0.85 mol%, more preferably from 0.2 to 0.88 mol%. The invention relates to the technical field of organic solvents, in particular to a method for preparing the organic solvents, which comprises the following steps of: preferably, 1-3mol%, more preferably, 0.3-0.88 mol%, more preferably, 0.4-0.88 mol%, even more preferably, 0.5-0.85 The vinyl pyrrolidone copolymer of the present invention is particularly suitable for use in coatings of medical devices and / or medical aids. Thus, the invention also relates to a composition comprising a vinyl pyrrolidone copolymer and optionally a cross-linking agent, and a medical device having a coating comprising a cross-linked vinyl pyrrolidone copolymer and optionally a cross-linking agent.