130 results about "Propylene Polymers" patented technology

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.

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 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 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

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

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.

Embodiments disclosed herein relate to a use of propane contained in a propylene feedstock for setting up impact copolymer polypropylene production in at least two polymerization zones comprising accumulating the propane in a first polymerization zone (2, 5) during a parallel operation mode of the first polymerization zone (2, 5) and a second polymerization zone (7, 10) producing respective propylene polymers. Embodiments disclosed herein also relate to a process and a system for setting up impact copolymer polypropylenes production.

This invention relates to laminated articles of nonwoven fabrics made of crimped composite fibers and articles comprising such laminated articles. This invention provides a nonwoven laminate comprising at least two layers, wherein at least one layer of the laminate comprises a nonwoven fabric of crimped composite fibers, the crimped composite fibers comprising: a first propylene polymer and a second propylene polymer, wherein the melting point of the second propylene polymer is 30°C or more higher than that of the first propylene polymer, the melting point being measured by differential scanning calorimetry (DSC), the melt flow rate (MFR: measurement temperature 230°C, load 2.16 kg) ratio (second polymer / first polymer) of the first and second propylene polymers is 1.7 or greater, the melt flow rate being measured according to ASTM D1238, and the component ratio expressed as the weight ratio of the first propylene polymer / second propylene polymer is 50 / 50 to 10 / 90, wherein the nonwoven fabric has a thickness of 0.484 mm or greater, 10 EA / 10 The curl count is 50 mm or greater, and the longitudinal (MD) stiffness is 50 mm or less in the adhesive area of ​​the embossed pattern.

The invention relates to a propylene polymer, the melt flow rate of the propylene polymer is greater than 40 g / 10 min under the conditions of 230 DEG C and a load of 2.16 kg, and the room temperature xylene soluble content (XS) of the propylene polymer is less than 4 wt%; preferably, the bending elastic modulus of the propene polymer is larger than or equal to 1.3 GPa, the tensile yield stress is larger than or equal to 32 MPa, and the simply supported beam impact strength is larger than or equal to 1.8 KJ / m < 2 >. The invention also relates to a preparation method and application of the propylene polymer. The propylene polymer provided by the invention has a high melt flow rate, also has a satisfactory lower xylene soluble substance content, and does not contain a plasticizer phthalate. In addition, due to the characteristic of low xylene soluble substance content, the product with high melt flow rate is endowed with better mechanical properties such as excellent stereoregularity, tensile yield stress, flexural modulus, impact strength and the like.

The present invention discloses a high thermal conductivity propenyl insulating material and a preparation method thereof, the propenyl insulating material comprises a propene polymer and a boron nitride filler, the boron nitride filler comprises micron boron nitride and nano boron nitride with a mass ratio of 3: 7-7: 3, the micron boron nitride particles with a particle size of 1-3 [mu] m account for 40-50 wt%, and the nano boron nitride particles with a particle size of 1-3 [mu] m account for 40-50 wt%. The proportion of particles with the particle size of 100-300nm in the nano boron nitride is 40-50wt%, and the content of the boron nitride filler in the allyl insulating material is 10-20wt%. According to the invention, by regulating and controlling the proportion and size distribution of two kinds of boron nitride with different sizes, a heat-conducting filler network is formed to improve the heat-conducting property of the material and play a role in nano eutectic self-enhancement, and the breakdown performance and dielectric loss of the material are improved instead of being reduced.

The solid titanium catalyst component (I) of the present invention contains titanium, magnesium, halogen, and a cyclic multiple-ester-group-containing compound (a) represented by the following formula (1).

Provided is a polymer blend composition comprising linear low density polyethylene, a polypropylene polymer, generally comprising a random polypropylene copolymer, and a compatibilizer. In one embodiment, there is provided a polymer blend composition comprising 15 to 35 wt % of a polypropylene polymer, 30-60 wt % of a linear low density polyethylene, and a compatibilizer polymer composition comprising 21-50 wt % of the polymer blend. The polymer blend is quite useful in a roofing membrane.

The present disclosure relates to a polyethylene composition particularly suited for blow molding, comprising: A) from 99.5% to 94% by weight of a recyclate polyethylene component; and B) from 0.5% to 6% by weight of a polypropylene composition comprising from 8% to 30% by weight of a propylene polymer fraction (a) and from 70% to 92% by weight of a polymer fraction (b) comprising one or more copolymer(s) of ethylene containing an amount of units deriving from ethylene equal to or lower than 40% by weight, wherein the polymer fraction (b) comprises a fraction soluble in xylene at 25°C equal to or greater than 60% by weight.

A polypropylene composition made from or containing:A) From 96 wt % to 80 wt %; of a propylene homopolymer having a fraction insoluble in xylene at 25° C. greater than 90 wt %, based upon the total weight of the propylene homopolymer; and a melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg between 80.0 g / 10 min and 300.0 g / 10 min; andB) From 4 wt % to 20 wt %; of a propylene ethylene copolymer having an ethylene derived units content ranging from 18 wt % to 38 wt %, based upon the total weight of the propylene ethylene copolymer;wherein the polypropylene composition having:a melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, between 80.0 g / 10 min and 150.0 g / 10 min;the sum of the amounts of A) and B) being 100 wt %.

The present invention relates to a cable comprising at least one layer comprising a polypropylene composition comprising (A) from 80.0 to 99.0 wt.-%, preferably from 82.5 to 97.2 wt. %, most preferably from 85.0 to 95.0 wt.-% of a copolymer of propylene and comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms having a total amount of comonomer units of from 10.0 to 16.0 wt %, preferably from 11.0 to 15.0 wt %, most preferably from 12.0 to 14.0 wt %, based on the total amount of monomer units of the copolymer of propylene (A); a melt flow rate MFR2 of from 0.5 to 2.5 g / 10 min, preferably from 0.8 to 2.3 g / 10 min, still more preferably from 1.0 to 2.0 g / 10 min and most preferably from 1.2 to 1.7 g / 10 min; a xylene cold soluble (XCS) fraction in a total amount of from 25.0 to 50.0 wt %, preferably from 27.5 to 45.0 wt %, more preferably from 30.0 to 42.5 wt % and most preferably from 32.5 to 40.0 wt %, based on the total weight amount of the copolymer of propylene (A); and (B) from 1.0 to 20.0 wt.-%, preferably from 2.5 to 17.5 wt %, most preferably from 5.0 to 15.0 wt.-% of a propylene polymer having a density of from 855 to 890 kg / m, preferably from 860 to 885 kg / m3, mot preferably from 865 to 880 kg / m3.

A graft copolymer obtained by carrying out graft polymerization of monomers including a vinyl cyanide-based monomer and an aromatic vinyl-based monomer on a propylene-based polymer, wherein the propylene-based polymer is a random copolymer, and the melt flow rate of the propylene-based polymer at 230°C and 2.16 kg is greater than or equal to 1.5 g / 10 minutes but less than 8 g / 10 minutes.

An article including a foamed sheet prepared by foam injection molding of a polymer composition including a high melt strength polypropylene, wherein the high melt strength polypropylene has a melt strength determined in accordance with ISO 16790:2005 at a temperature of 200° C., using a cylindrical capillary having a length of 20 mm and a width of 2 mm, a starting velocity v0 of 9.8 mm / s and an acceleration of 6 mm / s2 of ≥30 cN.

The resin composition according to the present invention contains: a component (A) which is a crushed material derived from a waste bumper of an automobile and which contains 1% by mass or more but less than 30% by mass of xylene insoluble substances; the present invention relates to a resin composition comprising a component (A), a component (B), which is a coating film release powder derived from a waste bumper of an automobile and contains a xylene insoluble substance in an amount of 30% by mass or more and less than 50% by mass, and a component (C), which is a propylene polymer, in which the content of the component (A) is 15% by mass or more and 35% by mass or less relative to the total mass of the resin composition, and the content of the component (B) is 15% by mass or more and 35% by mass or less relative to the total mass of the resin composition. The content of the component (C) is from 30% by mass to 70% by mass (inclusive).

The application belongs to the technical field of polymers, and discloses a kind of thermoplastic insulating material resistant to electrical treeing and a preparation method and application thereof.The thermoplastic insulating material contains alkenyl monomer-containing graft-modified propylene polymer, optional propylene polymer, auxiliary agent and optional elastomer;The auxiliary agent contains antioxidant and voltage stabilizer;In the thermoplastic insulating material, the content of alkenyl monomer-containing structural unit in the graft state is 0.1-6wt%, and the content of xylene-soluble matter is 0-70wt%;The melt flow rate of the thermoplastic insulating material under a load of 2.16kg at 230℃ is 0.2-7g / 10min;The bending modulus of the thermoplastic insulating material is 150-1600MPa.The thermoplastic insulating material has stable electrical treeing resistance, and can be used stably for a long time at high temperature and high field strength.

The invention relates to a method for producing a cable comprising at least one elongate electrically conductive element, a first semiconductor layer surrounding the elongate electrically conductive element, an electrically insulating thermoplastic layer surrounding the first semiconductor layer, and a second semiconductor layer surrounding the electrically insulating thermoplastic layer, the electrically insulating thermoplastic layer being obtained from an electrically insulating composition comprising at least one thermoplastic polymer (e.g. a propylene polymer), the method implementing controlled cooling of the cable after extrusion of the aforementioned layers.

The application discloses a kind of polyfluoroethylene-propylene polymers without PFOA polymerization process, it is related to fluoropolymer field.The specific steps include: in high-pressure reactor, deoxygenated high-purity water is imported, the reactor is stirred, the reactor is oxygen-free replacement, organic metal emulsifier is added, and the reactor is heated;Mixing gas 1 of tetrafluoroethylene and hexafluoropropylene is imported to the reactor pressure to reach reaction pressure, molecular weight regulator and initiator are added, and mixing gas 2 of tetrafluoroethylene and hexafluoropropylene is continuously imported during reaction to maintain reaction pressure, when the emulsion solid content in the reactor reaches 23-27%, the reaction stops, and polyfluoroethylene-propylene is obtained after post-processing procedure.The polyfluoroethylene-propylene resin prepared by the method has stable performance between batches, does not contain PFOA, and the process is green and environmentally friendly.

The present invention relates to a process for the preparation of a propylene polymer, the process comprising the steps: a) prepolymerizing propylene in the presence of a metallocene catalyst in a first reactor, yielding a prepolymer (A), wherein the prepolymerization is conducted at defined conditions, b) transferring the prepolymer (A) to a second reactor, and c) polymerizing propylene and optionally one or more of C2 and C4 to C10 alpha olefin comonomers in the presence of the prepolymer (A) in the second reactor, yielding a propylene polymer (B). The present invention also relates to a propylene polymer obtainable or obtained by the process.

A polypropylene-based resin composition comprising: a polypropylene-based resin (A) that includes a block polypropylene (A-1) composed of a continuous phase comprising a propylene polymer (A-1a) and a rubber phase comprising a copolymer (A-1b) of ethylene and propylene; an ethylene / α-olefin polymer (B) that is a polymer of ethylene and a C4-10 α-olefin; an inorganic filler (C); and, optionally, a stearate (D), wherein the block polypropylene (A-1) is configured such that the intrinsic viscosity of the xylene-soluble fraction in tetrahydronaphthalene at 135°C is less than 4 dl / g, and the ethylene-derived unit content in the copolymer (A-1b) is 20-40 mass% based on the total mass of the copolymer (A-1b).