213 results about "Propylene Polymers" patented technology

The invention discloses a polyion liquid / polyvinylidene fluoride-hexafluoropropylene-based solid electrolyte with a microscopic liquid phase and a preparation method and application thereof, and the preparation method comprises the following steps: adding a lithium salt into N-methyl-2-pyrrolidone, and stirring until the lithium salt is completely dissolved; then adding imidazolyl polyion liquid to prepare a solution A; adding polyvinylidene fluoride-hexafluoropropylene into N-methyl-2-pyrrolidone to prepare a solution, adding the solution into the solution A, continuously stirring until the solution is fully dissolved to obtain a precursor solution of the solid electrolyte, casting the precursor solution onto a polytetrafluoroethylene mold, and carrying out vacuum drying to obtain the solid electrolyte. And the polyvinylidene fluoride-hexafluoropropylene polymer-based solid electrolyte added with the imidazolyl polyion liquid is prepared by adding the imidazolyl polyion liquid into the polyvinylidene fluoride-hexafluoropropylene polymer-based solid electrolyte. The polymer-based solid electrolyte with a microscopic liquid phase is obtained through an electrolyte preparation process which is mild in condition, simple to operate and easy for large-scale production, and the solid electrolyte has good conductivity and mechanical properties.

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.

Diaryl silane bridged metallocene catalysts, methods of making the same, and propylene polymers (copolymers) made therefrom. The obtained silane-bridged metallocene catalyst has very high activity in the polymerization of olefins, especially ethylene and propylene. The diarylsilane bridged metallocene may be synthesized by substituting a dichlorocyclopentadienyl fragment with lithium indenyl. Direct lithiation / substitution with an aryl or alkyl lithium reagent provides a dilithiated ligand that undergoes metallization with a Group IV metal precursor.

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.

A propylene polymer composition made from or containing:a) from 15 wt % to 35 wt % of a propylene 1-hexene copolymer containing from 6.2 to 8.5% by weight, of 1-hexene derived units and having a Melt Flow Rate from 3.5 to 8.5 g / 10 min;b) from 15 wt % to 35 wt % of a propylene 1-hexene copolymer containing from 10.4 wt % to 14.5 wt %, of 1-hexene derived units and having a Melt Flow Rate from 3.5 to 8.5 g / 10 min; andc) from 38 wt % to 68 wt % of a propylene ethylene copolymer containing from 3.4 wt % to 5.7 wt % of ethylene derived units and having a Melt Flow Rate from 3.5 to 12.0 g / 10 min,wherein the sum of the amount of a), b) and c) being 100.

The invention belongs to the technical field of propylene polymerization, and particularly relates to a propylene polymer directly prepared by polymerization reaction and a preparation method thereof, and the method comprises the following steps: (i) in the presence of a polymerization catalyst and hydrogen, propylene or propylene and optional one or more comonomers are subjected to a first-stage (co) polymerization reaction for 0.1-10 hours, preparing a material flow containing a polypropylene-I component; (ii) continuing to polymerize at least a portion or all of the stream containing the polypropylene-I component in a line located outside the reactor in the presence of a hydrogenation catalyst for 0.01-3 hours; then stopping the reaction to obtain a propylene polymer containing an ultra-high molecular weight polypropylene component; wherein the molar ratio of the hydrogenation catalyst to the total hydrogen in the reactor is 1 / 10000-1 / 100. According to the invention, the properties (including melt strength, tensile strength, impact strength, bending strength and the like) of a polypropylene product are remarkably improved while good processability is maintained.

A polypropylene composition (I) comprising: (A) at least 90 wt.% of a propylene polymer comprising: (a) from 20 wt.% to 44 wt.% of a propylene-hexene copolymer, (b) from 25 wt.% to 45 wt.% of a propylene-hexene-ethylene terpolymer, (c) from 25 wt.% to 50 wt.% of a propylene-ethylene copolymer; wherein-the melt flow rate of components (a) + (b) + (c) ranges from 3.5 to 12.0 g / 10 min; the propylene polymer (A) has a xylene soluble content ranging from 16.4% to 35.3% by weight, and the propylene polymer (A) has a melting point ranging from 122 DEG C to 132 DEG C, and (B) up to and including 10.0% by weight of polybutene, the amounts of (A) and (B) being based on the total weight of (A) + (B).

The invention discloses a method for preparing a multi-block segmented copolymer with comonomer content in cascade distribution based on multiple reactors, which comprises the following steps of: adjusting the comonomer content, the comonomer type, the retention time and the catalyst type of each reactor by adopting a mode of connecting multiple reactors in series; the segmented copolymer with the comonomer content in cascade distribution is adjustable in strength and toughness range and good in product compatibility. The process method provided by the invention is especially suitable for a catalyst system of which the copolymerization capability is sensitive to the content of a comonomer. The block olefin copolymer has the characteristics of high mechanical strength, enhanced toughness, enhanced peel strength with glass or a back plate, increased crosslinking degree and improved light transmittance. The prepared polyolefin product can be widely applied to strength and hardness modification of vinyl polymers or allyl polymers.

The present invention provides a polypropylene-based resin composition comprising a polypropylene-based resin (A) including a continuous phase consisting of a propylene polymer (a1) and a rubber phase consisting of a copolymer (a2) of ethylene and α-olefin having 3-10 carbon atoms, and an optional component ethylene / α-olefin copolymer (B) which is a copolymer of ethylene and α-olefin having 3-10 carbon atoms.

The present invention relates to a polypropylene-based master batch comprising 15-35% by weight, based on the total weight of the polypropylene-based master batch, of a polypropylene having a melt flow rate MFR (230 DEG C, 230 DEG C, 230 DEG C) of 15-50 g / 10 min measured according to ISO 1133. 2.16 kg) and 65-85% by weight, based on the total weight of the polypropylene-based masterbatch, of a surface-treated filler material product comprising at least one heavy calcium carbonate-containing filler material; a polyester fiber composition comprising the polypropylene-based master batch; a polyester nonwoven or filament formed from the polyester fiber composition; the invention also relates to a method for preparing the polyester nonwoven or filament and to the use of the polypropylene-based masterbatch in the production of polyester nonwoven or filament and to articles formed from polyester nonwoven or filament.

Nonwoven fabrics are provided that include a plurality of crimped bicomponent fibers having a first component comprising a first polymeric material comprising a first polymer or a first polymeric blend and a second component comprising a second polymeric material, in which the second polymeric material comprises a second polymeric blend of (i) at least one polypropylene polymer, (ii) at least one polyethylene polymer, and (iii) at least one compatibilizer comprising or consisting of at least one polypropylene-polyethylene copolymer.

The application discloses a light reflection and enhancement film and an enhanced photovoltaic module with the same, the light reflection and enhancement film comprises a buffer layer and a substrate layer, the preparation raw materials of the buffer layer comprise an ethylene polymer, a mesoporous composite material, a filler and an additive, and the preparation raw materials of the substrate layer comprise a propylene polymer alloy, the mesoporous composite material, the filler and the additive. The light reflection and enhancement film and the enhanced photovoltaic module with the same have the advantages that the mesoporous material is compounded with the nanometer material to form the mesoporous composite material, and then the mesoporous composite material is used for preparing the buffer layer and the substrate layer, so that the reflectivity of the ultraviolet region of 330-380 nm, the adhesion between the buffer layer and the battery and the adhesion between the substrate layer and the adhesive film are improved, the light reflection and enhancement film is applied to the gap position between the battery pieces on the photovoltaic battery, the battery hidden crack and the fragments can be avoided, and the module power can be greatly improved compared with the application on the glass.

The invention relates to the technical field of olefin polymerization, in particular to a catalyst component for preparing a propylene polymer, the propylene polymer and a synthesis method of the propylene polymer. When the melt index of the propylene polymer is 2g / 10min to 20g / 10min, the z-average molecular weight of the propylene polymer is greater than or equal to 1,000,000; when the isotacticity of the propylene polymer is greater than or equal to 96%, mmmm% in boiling heptane insoluble substances is greater than or equal to 89%; the bending elastic modulus of the propylene polymer is greater than or equal to 1.3 GPa, the tensile yield stress is greater than or equal to 32 MPa, and the cantilever beam notch impact strength is greater than or equal to 40 J / m; the polymer contains a part of molecules with particularly large molecular weight, and the part of macromolecules have relatively regular molecular chains, so that the polymer is excellent in rigid-tough balance, and particularly high in modulus.

To provide an adhesive having excellent adhesion between a polypropylene resin and a metal, and particularly, a polymer material that enables excellent bonding of metal surface substrates without surface treatment.SOLUTION: Provided is a chlorosulfonated propylene polymer in which chlorine and chlorosulfone groups are bonded to a propylene polymer, the chlorosulfonated propylene polymer having a chlorine content of 5.0-23.0 wt.% and a sulfur content of 0.1-5.0 wt.%, and a crystal melting energy of 5-100 J / g as measured with a differential scanning calorimeter (DSC).SELECTED DRAWING: None

The present invention addresses the problem of providing a modified polyolefin resin composition which contains a high content of an unsaturated carboxylic acid or an acid anhydride thereof, has little influence of reaction residues, can suppress an increase in fluidity after graft modification, and has excellent mechanical properties such as bending strength and impact resistance of a molded article when used as a compatibilizer for fiber-reinforced plastics. [Solution] The resin composition contains a reaction product obtained by reacting a propylene polymer (A), a diene elastomer (B), and an unsaturated carboxylic acid or an acid anhydride (C) thereof, and the content of the unsaturated carboxylic acid or the acid anhydride (C) thereof in the resin composition is 2.0 mass% or more. The melt mass flow rate of the resin composition measured at 190 DEG C / 2.16 kg as specified in JIS K 7210 is 2 g / 10 min to 500 g / 10 min (inclusive), and the reaction residue derived from the unsaturated carboxylic acid or the anhydride (C) thereof in the resin composition is less than 2.0 mass%.

This invention discloses a propylene polymer-based composite film, its preparation method, and its applications. The composite film comprises at least two distinct layers: layer a and layer b; wherein layer a and layer b each contain at least one propylene polymer; and at least one of layers a and b contains a propylene impact copolymer; wherein the propylene impact copolymer contains an elastic portion that forms a dispersed, strip-shaped rubber phase in the composite film, the rubber phases being arranged parallel to each other, and the average dimension of the rubber phases along their transverse axis being 20-200 nm and the average aspect ratio being 5-20. This composite film simultaneously exhibits excellent impact resistance and optical properties, even good tensile properties and / or good heat-sealing strength at relatively low heat-sealing temperatures, and even good uniformity. This composite film is particularly suitable for use in the packaging materials field, especially in battery packaging materials, electronic product packaging materials, or food packaging materials.

A nonwoven fabric (NF) comprising a multilayer structure, the multilayer structure comprising: i) at least one meltblown layer (M) comprising meltblown fibers (MBF) comprising a first propylene polymer (PP1) having: a) an amount of 2,1- region defects in the range of 0.0 to 0.1 mol%; and b) a melting temperature T in the range of 155 to 170°C. m ii) at least one spunbond layer comprising spunbond fiber (SBF) comprising a second propylene polymer (PP2) having: a) an amount of 2,1- region defects in the range of 0.4 to 1.5 mol%; and b) a melt temperature T in the range of 145 to 160 °C. m The melting temperature T of the first polypropylene polymer m (PP1) has a higher melting temperature than the first polypropylene polymer (T). m (PP2) at least 5.0°C.

The invention discloses a pearlescent paper structure and a manufacturing method thereof. The pearlescent paper structure is provided with a middle layer and a matte layer. The matte layer is arranged on the middle layer, the matte layer is made of a polyolefin material and a filler, and the polyolefin material is formed by reacting a propylene polymer, an ethylene polymer and an initiator. The total weight of the matte layer is 100 weight percent, the content of the propylene polymer is 20 to 65 weight percent, the content of the ethylene polymer is 30 to 75 weight percent, and the content of the filler is 5 to 10 weight percent. The arithmetic mean roughness of the matte layer is 0.5 [mu] m to 1.3 [mu] m. Through selection of materials and adjustment of manufacturing steps, the polyolefin material generates fewer crystal points, so that the pearlescent paper has better printing quality, and the pearlescent paper structure has lower surface roughness.

The invention provides a propylene polymerization sphere-like catalyst component, a solid titanium main catalyst and a preparation method and application of the solid titanium main catalyst, the solid titanium main catalyst comprises titanium halide, magnesium halide and peroxidated benzoate internal electron donors, and under the action of an alkyl aluminum cocatalyst and an organosilicon compound external electron donor, the solid titanium main catalyst is prepared into the sphere-like catalyst component. The catalyst is used for propylene polymerization or copolymerization, shows very high polymerization activity, very good hydrogen regulation sensitivity and stereospecificity, can be used for preparing a green and environment-friendly propylene polymer with high polymer isotacticity, good particle morphology and less fine powder, and can be used for producing a polypropylene product with a high melt index.

The purpose of the present invention is to provide an airbag storage cover that has excellent long-term heat resistance, long-term light resistance, and fogging resistance while maintaining high-temperature strength and low-temperature impact resistance. The present invention relates to an airbag storage cover containing a thermoplastic elastomer composition containing 10-300 parts by mass of the following component (B) with respect to 100 parts by mass of the following component (A). Component (A): Propylene-based polymer. Component (B): Olefin-based block copolymer containing an ethylene polymer block and an ethylene 1-octene copolymer block, and satisfying the following condition (X1). Condition (X1): In the proportion of triad monomer sequences determined by 13C NMR measurement, the sum of OOO, OOE, and EOO is 6.0-20.0% (where E represents an ethylene monomer unit and O represents an octene monomer unit).

The invention belongs to the technical field of polypropylene preparation, and particularly relates to a propylene polymer, a preparation method thereof and a polypropylene composition. The propylene polymer is characterized in that the propylene polymer comprises a propylene homopolymer as a matrix, and the content of the propylene homopolymer is greater than or equal to 99 wt%; the composition comprises a polymer nucleating agent, and the mass content of the polymer nucleating agent is 1-1000 ppm; the matrix comprises 0.1 wt%-10.0 wt% of ultra-high molecular weight components with the molecular weight M greater than or equal to 10,000,000; m < z + 1 > of the propylene polymer is greater than or equal to 6000 * 10 < 3 >, and M < z + 1 > / Mn is greater than or equal to 100. The propylene polymer provided by the invention has both processability and mechanical properties, and the rigidity and toughness of the mechanical properties are remarkably improved at the same time.

The invention is directed to a polypropylene composition having improved scratch resistance properties, wherein the polypropylene composition comprises (i) ≥50.0 wt. % and ≤90.0 wt. % of a propylene polymer, (ii) ≥5.0 wt. % and ≤30.0 wt. % of an elastomeric ethylene alpha-olefin co-polymer, and (iii) ≥0.1 wt. % and ≤20.0 wt. % of a poly(siloxane-carbonate) block copolymer, with regard to the total weight of the polypropylene composition. The invention further relates to a process for preparing such polypropylene composition and to an article comprising the polypropylene composition.

The disclosure relates to a method for producing a propylene polymer composition, comprising melt processing a propylene polymer in the presence of a composition comprising at least one hydrogen donor comprising a di-substituted p-cresol derivative, at least one peroxide comprising a peroxydicarbonate, and at least one polymer additive comprising at least one antioxidant distinct from the at least one hydrogen donor The melt processing is performed under inert conditions. The disclosure further relates to embodiments of propylene polymer compositions.

To provide: a method for producing a solid catalyst for propylene-based copolymerization which makes it possible to produce a polypropylene having high stereoregularity and excellent melt flowability in high yield, and also to produce a copolymer having a high comonomer content through copolymerization with an alpha-olefin, and may further dramatically reduce an agglomeration phenomenon of polymer particles during the copolymer production; and a method for producing a propylene-based polymer using the same.SOLUTION: A method for producing a solid catalyst for propylene-based polymerization comprises steps of: a step (1) of reacting a dialkoxy magnesium with a metal halide compound in the presence of an organic solvent; a step (2) of reacting the reaction product of the step (1) with at least one internal electron donor while increasing the reaction temperature; and a step (3) of reacting the reaction product of the step (2) with a titanium halide.SELECTED DRAWING: None

The present invention relates to a flame retardant polypropylene composition (C) comprising a propylene polymer (PP), a nitrogen containing flame retardant (FR) and an anti-dripping agent (A), the anti-dripping agent (A) having a F 30 high melt strength polypropylene (HMS-PP) having a melt strength of at least 20 cN. Furthermore, the present invention also relates to a flame retardant polypropylene composition (C) having a F 30 use of a high melt strength polypropylene (HMS-PP) having a melt strength of at least 20 cN as an anti-dripping agent and an article comprising the flame retardant polypropylene composition (C).

An object of the present invention is to provide a film for a capacitor such that the film excels in high-temperature dielectric breakdown voltage (high-temperature BDV) and has blocking resistance, and bleeding-out of, for instance, a nucleating agent is suppressed even after long-term storage. The present invention pertains to a multilayer polypropylene film for a capacitor, the film including a base layer composed of a propylene polymer composition containing a propylene homopolymer (X) and 0.0001 to 0.05 mass % of a polymer-based α-crystal nucleating agent (C), and a front layer or a back layer composed of a propylene-based polymer (Y) on at least one surface of the base layer, wherein the base layer and the front layer or back layer are stretched.

To provide a method for producing a polyoxypropylene-based polymer, by which the polyoxypropylene-based polymer having a large molecular weight and exhibiting a low viscosity due to a narrow molecular weight distribution can be produced without using a large amount of water.SOLUTION: The polyoxypropylene-based polymer having a design molecular weight value X (g / mol) of 12,000g / mol or more and 30,000g / mol or less is obtained by setting the internal temperature of a reaction vessel charged with an initiator, a double metal cyanide complex catalyst, and propylene oxide to 90 °C or higher and 110 °C or lower. Activating the double metal cyanide complex catalyst, and after adjusting the internal temperature of the reaction vessel to a temperature of at least 90 °C and at most 110 °C, carrying out polymerization by additionally adding propylene oxide to the reaction vessel over Y minutes under a condition of at least 120 °C and at most 160 °C, wherein the value of X / Y is at least 35 and at most 67.SELECTED DRAWING: None

A polypropylene composition comprising: (a) from 45.7% to 69.7% by weight of a crystalline propylene polymer; (b) from 5.3% to 29.3% by weight of an elastomeric copolymer of ethylene and propylene; (c) from 3.0% to 27.0% by weight of recycled polyethylene (r-PE); d) from 1.0% to 15.0% by weight of a crystalline propylene homopolymer; the percentages of (a), (b), (c) and (d) are relative to the sum of (a), (b), (c) and (d).

The present invention relates to a cast film comprising a polypropylene composition comprising a) more than 85 to less than 98 wt.-% (based on the overall weight of the polyolefin composition) of at least one polypropylene polymer (PP) having a MFR2 (according to ISO1133, 2.16 kg load at 230 °C) in the range from 1.0 to 6.0 g / 10 min, a molecular weight distribution index Mw / Mn measured by GPC (according to ISO 16014-4:2003 and ASTM D 6474-99) in the range from 4.0 to 8.0, a xylene soluble content (XCS) determined according to ISO 16152 based on the overall weight of polypropylene polymer in the range from 2.0 to 3.5 wt.-%, b) more than 2.0 to less than 15 wt.-% (based on the overall weight of the polyolefin composition) of a hydrocarbon resin product comprising a hydrocarbon resin having a glass transition temperature TG (according to ISO 11357-2:2020) of more than 50°C, preferably in the range from 50 to 125°C; and a weight average molecular weight Mw (according to ISO 16014-4:2003 and ASTM D 6474-99) in the range from 1.0 to 10.0 kg / mol; and c) optionally further additives, wherein the sum of all ingredients always adds up to 100 wt.-%.

Provided is a roofing membrane composition comprising from 3 to 6 wt % of a thermoplastic polypropylene polymer, from 32 to 57 wt % of a linear low density polyethylene, and from 5 to 25 wt % of a performance modifier polymer. The roofing membrane composition has been found to provide an economical roofing membrane which meets the elevated temperature requirements now demanded in the industry. The roofing membrane composition further comprises a flame retardant, an ultraviolet stabilizer, and a pigment.