141 results about "Vinyl polymer" patented technology

To provide a group of polyorganosiloxane-containing polymer particles that yield molded articles with excellent impact strength. [Solution] A polyorganosiloxane-containing polymer particle group according to one aspect of the present invention comprises a polymer (A) containing a polyorganosiloxane (A1) and a first vinyl polymer (A2), and a second vinyl polymer (B). When the cross-section of a resin piece obtained by dispersing the polyorganosiloxane-containing polymer particle group in a resin is observed with a transmission electron microscope, the ratio of the number of particles satisfying the following formula (1) is less than 60%, where L is the diameter of each particle in the polyorganosiloxane-containing polymer particle group and M is the maximum domain length of the polyorganosiloxane (A1). M / L>0.1 ···(1)

The present invention relates to a polymer composition comprising an ethylene-based polymer and a polylactic acid. Such polymer composition exhibits desirably good melt fracture prevention properties, in particular in production of polymer films.

The invention relates to the technical field of lithium ion batteries, in particular to an ultrahigh-nickel ternary positive electrode material as well as a preparation method and application thereof. The preparation method of the ultrahigh-nickel ternary positive electrode material provided by the invention comprises the following steps: mixing a first vinyl polymer, a precursor, a metal oxide and a solvent to obtain a spinning solution A; mixing a second vinyl polymer, a lithium source and a solvent to obtain a spinning solution B; respectively depositing the spinning solution A and the spinning solution B by adopting an opposite electrostatic spinning technology to obtain a film-shaped material, and sintering to obtain a matrix material; and coating the surface of a base material by a wet method to prepare a fast ion conductor coating layer, and carrying out second sintering to obtain the ultrahigh-nickel ternary positive electrode material. According to the method provided by the invention, the agglomeration phenomenon of the ultra-high nickel positive electrode material in the sintering process is effectively reduced, so that the lithium ion battery containing the ultra-high nickel ternary positive electrode material has relatively high capacity and excellent cycle performance.

The present invention relates to a multilayer film comprising: an inner layer system comprising a first surface and a second surface; a first skin layer adhered to the inner layer system at the first surface of the inner layer system; and a second skin layer adhered to the inner layer system at the second surface of the inner layer system; wherein the inner layer system consists of a polymer formulation (A), wherein the polymer formulation (A) comprises: > 60.0 and < 90.0 wt% of a first ethylene-based polymer which is a linear low density polyethylene A (LLDPE A); and > 10.0 and < 40.0 wt% of a high density polyethylene (HDPE) having a density > 940 and < 970 kg / m 3 , preferably > 955 and < 970 kg / m 3 ; measured according to ASTM D792 (2008); and the first and / or second skin layer is a sealing layer comprising a second ethylene-based polymer which is a linear low density polyethylene B (LLDPE B) comprising polymerized moieties derived from ethylene and 1-octene or 1-hexene having a density > 890 and < 915 kg / m 3 , preferably > 900 and < 915 kg / m 3 , measured according to ASTM D792 (2008); preferably, wherein the sealing layer comprises > 70.0 wt% of the second ethylene-based polymer, or wherein the sealing layer consists of the second ethylene-based polymer; wherein the multilayer film is a biaxially oriented film, wherein the biaxial orientation is introduced in solid state. This film allows the production of a sealed package having a sufficiently high seal strength at reduced sealing temperature (also referred to as seal initiation temperature) which at the same time has improved tensile properties, such as an improved tensile modulus in machine and transverse direction and an improved tensile strength in machine and transverse direction, which has proven.

The present invention provides a curable resin composition containing a vinyl polymer having a reactive silyl group, which exhibits excellent weather resistance and good extensibility. [Solution] A curable resin composition comprising a vinyl polymer (A), wherein the vinyl polymer (A) has a main chain having repeating units of polymerizable vinyl monomers and reactive silyl groups bonded to the vinyl polymer main chain via a urethane structure, and the vinyl polymer (A) is a polymer obtained by silylation of the plurality of hydroxyl groups of a vinyl polymer (a) having a plurality of hydroxyl groups and a weight-average molecular weight / hydroxyl value of more than 4,000.

A nonaqueous secondary battery electrode binder composition comprising a water soluble vinyl polymer that includes a structural unit (a) derived from a vinyl monomer (A) that has an acid component, a structural unit (b) derived from a vinyl monomer (B) that exhibits a solubility of 8-300 g with respect to 100 g of water at 25°C, and a structural unit (c) derived from a vinyl monomer (C) that exhibits a solubility of not less than 1 g to less than 8 g with respect to 100 g of water at 25°C, wherein the content proportion of the structural unit (c) derived from the vinyl monomer (C) is 5-80 mol% with respect to all monomer units of the water soluble vinyl polymer.

The present invention relates to a vinyl chloride-based polymer, a resin composition comprising same and a preparation method therefor, the vinyl chloride-based polymer having a degree of polymerization of 2,800-5,000, and having a polydispersity index of 3.5 or more, calculated from a weight average molecular weight and a number average molecular weight which are obtained through gel permeation chromatography (GPC) analysis by using polystyrene as a standard according to US EPA 3640A: 1994.

The present invention relates to a thermoplastic material, wherein the thermoplastic material comprises ethylene-based polymer material, wherein the ethylene-based polymer material has a Vicat softening temperature of ≥50° C. as determined in accordance with ISO 306 (2013), method A50, and a weight loss as determined on a compression moulded sheet according to ISO 15527 (2010), Annex B, using silica sand / water slurry with a mass ratio of 3:2, test duration 7 h, of ≤0.50 wt %. The invention also relates to a slurry transportation pipe comprising the thermoplastic material as its inner layer, or consisting of the thermoplastic material.

The present invention relates to an organic peroxide emulsion comprising: at least one organic peroxide; at least one emulsifier comprising at least one non-ionic surfactant comprising at least one fatty chain and / or a protective colloid agent; a combination of two or more anti-gelling agents comprising not more than 9.5 wt% of a first anti-freezing agent, at least one second anti-freezing agent, relative to the total weight of the emulsion of ethanol; and water. The present invention also relates to a process for preparing such an emulsion, the use of such an emulsion for the polymerization or copolymerization of one or more ethylenically unsaturated monomers, and a halogenated vinyl polymer obtained by using such an emulsion.

The polymer particle group containing polyorganosiloxane involved in this invention comprises a polymer (A) containing polyorganosiloxane (A1) and a first vinyl polymer (A2) and a second vinyl polymer (B). When the cross-section of a resin sheet obtained by dispersing the polymer particle group containing polyorganosiloxane in a resin is observed with a transmission electron microscope, the diameter of each particle of the polymer particle group containing polyorganosiloxane is set to L, and the maximum length of the polyorganosiloxane (A1) region is set to M. The ratio of the number of particles satisfying the following formula (1) is less than 60%. M / L>0.1···(1).

The invention discloses a disubstituted alkyl azaanthrone visible light initiator, a preparation method and an application of the disubstituted alkyl azaanthrone visible light initiator in a thiol-olefin photopolymerization system. Under the protection of inert gas, a 2, 4-disubstituted alkyl heterocyclic anthrone compound is dissolved in an organic solvent, excessive alkali is added, and a reaction is carried out under the protection of inert gas to obtain the disubstituted alkyl azaanthrone visible light initiator. And slowly dropwise adding an excessive amount of an organic solution of an acyl chloride compound in an ice-water bath, reacting at room temperature, stopping the reaction after TLC (Thin Layer Chromatography) detects that the reaction is complete, carrying out suction filtration, concentrating filtrate, and purifying to obtain the novel disubstituted alkyl azacyclo-anthrone high-efficiency visible light initiator. The novel disubstituted alkyl azacyclo-anthrone compound obtained in the invention realizes double-bond copolymerization of sulfydryl in a thiol polymeric monomer and a vinyl polymeric monomer; the novel disubstituted alkyl azacyclo-anthrone compound obtained in the application can initiate and cure a prepolymer containing a mercaptan-olefin free radical photopolymerization system, so that the application range of the compound in a free radical photocuring system is widened.

The present invention relates to a biaxially stretched film having a layer obtained from a material containing an ethylene-based polymer having a melt flow rate (MFR) of 0.01 g / 10 minutes to 5.0 g / 10 minutes (inclusive), a density of 941 kg / m3 to less than 970 kg / m3, and a melt tension of 31 to 250 mN, the ratio (Mw / Mn) of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn) of the ethylene-based polymer measured by gel permeation chromatography (GPC) is 6.1 or more.

This invention provides a method for manufacturing a vinyl polymer, wherein a vinyl monomer is polymerized in the presence of a compound represented by formula (1). [Chemical 1] In formula (1), R 0 and R 1 Each of the following groups can be independently represented by a hydrogen atom, a cyano group, a monovalent hydrocarbon group that may have substituents, a monovalent heterocyclic group that may have substituents, an acetyl group, or -COOY. 1 When n is 1, R 2 It can be a monovalent hydrocarbon group that can have substituents, a monovalent heterocyclic group that can have substituents, an acetyl group, or -COOY. 2 When n is 2 or more, R 2 Through ester bond to R 0 With R 1 The bonded carbon atoms are followed by an n-valent group containing a chain hydrocarbon structure that can have ether bonds. X is an alkyl group or a monovalent electron-withdrawing group.

The present invention relates to a fibrous mat for a gypsum board, the fibrous mat comprising: a first layer comprising glass fibers; a second layer, the second layer being placed on the first layer, the second layer comprising glass fibers; a coating layer, the coating layer being placed on the second layer, the coating layer comprising at least one vinyl polymer; wherein the average diameter of the glass fibers in the first layer is greater than the average diameter of the glass fibers in the second layer; and the first layer and the second layer are impregnated with a composition comprising a binder. Furthermore, the invention relates to the use of the fibrous mat in a gypsum board, to a gypsum board containing the fibrous mat, to a method for producing a fibrous mat and to a method for producing a gypsum board.

The present invention relates to an aqueous crosslinkable vinyl polymer composition comprising 70 to 97.5 wt% of a crosslinkable oligomer PD1 stabilized dispersion of vinyl polymer P1, PD1 comprising a water-soluble or water-dispersible crosslinkable oligomer OL and at least one high molecular weight vinyl polymer P1 prepared in the presence of the water-soluble or water-dispersible crosslinkable oligomer OL; 2 to 29.5 wt% of at least one non-oligomer PD2 dispersion of vinyl polymer P2; and 0.5 to 28 wt% of at least one crosslinking agent X, and its use in coating compositions.

A polymer composition includes: (a) a propylene-based polymer having a melt mass-flow rate of ≥5.0 and ≤90.0 g / 10 min; and (b) ≥5.0 and ≤30.0 wt %, with regard to the total weight of the polymer composition, of an ethylene-based polymer having: a melt mass-flow rate of 3.0 and ≤30.0 g / 10 min; a density of ≥840 and ≤870 kg / m3; and a content of ≥25.0 and ≤50.0 wt % of moieties derived from 1-octene, with regard to the total weight of the ethylene-based polymer. Such polymer composition demonstrates improved low temperature impact strength, determined as Izod impact strength at −40° C. and / or at −30° C., as well as desirable toughness, determined as tensile modulus, whilst having good flowability in injection moulding and thereby allowing complex, thin-walled objects to be shaped.

The present invention provides: a novel binder that is capable of suitably contributing to the production of a battery and / or battery characteristics by means of a secondary battery binder which contains an aqueous polymer, wherein the amount of moisture generated at 170-290°C in the aqueous polymer is 15% by mass or less as measured by the measurement method described below, the aqueous polymer is a vinyl polymer that has a repeating unit having an acidic functional group and a nonionic hydrophilic repeating unit, the weight average molecular weight of the aqueous polymer is 1,000,000 or less, and the pH at 25°C of an aqueous solution that is obtained by dissolving the aqueous polymer in water at a concentration of 2% by mass is 6.5 to 8.5 inclusive; and a slurry which contains this binder. [Amount of moisture generated at 170-290°C] 20 g of an aqueous polymer solution which is obtained by dissolving the aqueous polymer in water so as to have a solid content concentration of 2% by mass is added to a tray, and after drying the aqueous polymer solution at 60°C for 8 hours in a forced convection oven, additional drying is performed for 24 hours under conditions of 60°C and a degree of pressure reduction of 0.1 MPa in a vacuum dryer so as to produce a film. The thus-produced film is cut into an approximately 2-mm-square piece weighing 10 mg, and measurement is performed under the conditions described below using a Karl Fischer moisture meter and a moisture vaporizer.　Measurement conditions: After the temperature is raised to 80°C, the temperature is kept at 80°C until the weight loss rate falls to 0.1 µg / s or less (method A). Thereafter, the temperature is raised from 80°C to 300°C over 30 minutes (method B).　Method A data collection interval: 1 second; Method B data collection interval: 5 seconds; Calculation of amount of generated moisture: The ratio of the amount of generated moisture is calculated according to the formula described below, where Wa is the weight after keeping the temperature at 80°C until the weight loss rate falls to 0.1 µg / s or less, and Wb is the amount of generated moisture detected between 170°C and 290°C.　Ratio of amount of generated moisture = Wb / Wa × 100 (% by mass)

Embodiments are directed to a thermally cross-linked ethylene-based polymer comprising an ethylene-based polymer formed by high pressure (greater than or equal to 100 MPa and less than or equal to 400 MPa), free-radical polymerization of ethylene and one or more hydrocarbon-based molecules. Each of the one or more hydrocarbon-based molecules comprises three or more terminal alkene groups. The thermally cross-linked ethylene-based polymer, thermally cross-linked in the presence of oxygen, has a greater melt elongation relative to an ethylene-based polymer not subjected thermal crosslinking in the presence of oxygen. Further embodiments are directed to a process for making the thermally cross-linked ethylene-based polymer.

Provided is a polyvinyl alcohol resin in which, as a polymer component, substantially only a polyvinyl alcohol is contained, wherein the absorbance Abs320 of a 0.1 mass% aqueous solution of the polyvinyl alcohol resin when optical path length is 10 mm and wavelength is 320 nm is not less than 0.09, the ratio (Abs320 / Abs370) of the absorbance Abs320 to the absorbance Abs370 of a 0.1 mass% aqueous solution of the polyvinyl alcohol resin when optical path length is 10 mm and wavelength is 370 nm is not greater than 4.9, and the combined content of bivalent metallic elements and trivalent metallic elements is less than 30 μmol / g.

Thermoplastic vinyl polymers are depolymerized in a non-reverse-mixing tubular reactor at a mild temperature (150 to 350°C) in the presence of a depolymerization catalyst. To promote depolymerization, hydrogen is preferably present. This depolymerization produces useful low molecular weight chemicals such as alkanes and alkenes, which can be used as raw materials for steam cracking to produce ethylene and other polyolefins, or as raw materials for waxes and greases.

The present disclosure provides an article. The article includes an adhesive layer with two opposing surfaces. The adhesive layer includes (i) a functionalized ethylene-based polymer having a melt index from 0.1 g / 10 min to 300 g / 10 min; (ii) from 0.01 wt % to 45 wt % of a functionalized hydrocarbon; (iii) a tackifier; and (iv) optionally, a crosslinking agent.

The present invention relates to a vinyl chloride-based polymer, a resin composition comprising same, and a method for preparing same, the vinyl chloride-based polymer having a degree of polymerization of 2800-5000, and a ratio (Mz / Mw) of a relative z-average molecular weight to a relative weight-average molecular weight of 2.6-5.5, the relative weight-average molecular weight being obtained using gel permeation chromatography (GPC) analysis with polystyrene as a reference material.

Embodiments are directed to a thermally cross-linked ethylene-based polymer comprising an ethylene-based polymer formed by high pressure (greater than or equal to 100 MPa and less than or equal to 400 MPa), free-radical polymerization of ethylene and one or more cyclicvinylsiloxane molecules. Each of the one or more cyclicvinylsiloxane molecules comprises two or more vinyl groups. The thermally cross-linked ethylene-based polymer, thermally cross-linked in the presence of oxygen, has a greater melt elongation relative to an ethylene-based polymer not subjected thermal crosslinking in the presence of oxygen. Further embodiments are directed to a process for making the thermally cross-linked ethylene-based polymer.

The invention relates to the field of polyurethane materials, and discloses a polyurethane material for service-oriented AGV trundles and a preparation method of the polyurethane material. The polyurethane material for the service-oriented AGV caster is prepared from a component A and a component B in parts by weight, wherein the component A is prepared from the following components in parts by weight: 40 to 50 parts of isocyanate prepolymer, 10 to 15 parts of wear-resistant additive, 0.5 to 1.5 parts of release agent and 0.3 to 1 part of antioxidant; the component B is prepared from the following components in parts by weight: 15 to 25 parts of polytetrahydrofuran ether glycol, 10 to 18 parts of polycaprolactone glycol, 8 to 12 parts of a chain extender and 0.2 to 0.4 part of a catalyst; the isocyanate prepolymer is prepared by reacting 4, 4 '-diphenylmethane diisocyanate, vinyl polymer grafted polyether polyol, a hydroxy alcohol and ethylene oxide-propylene oxide copolymer, diethylene glycol and a catalyst. The polyurethane material disclosed by the invention has good wear resistance and rebound resilience, and has good wear resistance, buffering and damping performance and low rotation resistance when being applied to service-oriented AGV trundles.

A slurry polymerization process for producing polyethylene in a polymerization reactor at a temperature of 40°C to 150°C and a pressure of 0.1 MPa to 20 MPa to obtain an ethylene-based polymer, wherein the polymerization occurs in the reactor slurry at least in the presence of a catalyst, ethylene and a diluent in the polymerization reactor, wherein the process comprises a shutdown phase in which at least one reactor inlet is closed, the reactor is cooled to a predetermined temperature threshold, the agitator is stopped, the reactor slurry is allowed to settle to the bottom of the internal reactor volume, active cooling of the reactor and heat exchangers is stopped, and the circulation loop pump is stopped.

To provide a technique for producing an aqueous suspension containing brimonidine and / or a salt thereof, brinzolamide and / or a salt thereof, and a carboxyvinyl polymer.SOLUTION: In an aqueous suspension containing brimonidine and / or a salt thereof, brinzolamide and / or a salt thereof, and a carboxyvinyl polymer, by selecting a carboxyvinyl polymer having a viscosity retention ratio against salt of 18% or less measured under the conditions shown in the specification as the carboxyvinyl polymer, an increase in the particle size of suspension particles (brinzolamide and / or a salt thereof) in the aqueous suspension over time can be suppressed.SELECTED DRAWING: None

Embodiments of the present disclosure relate to a thermoplastic adhesive composition comprising: at least one maleic anhydride grafted ethylene-based polymer; at least one ethylene / alpha-olefin / non-conjugated diene interpolymer having a molecular weight distribution (MWD) > 2.5, where MWD = Mw / Mn, where Mw is the weight average molecular weight and Mn is the number average molecular weight, both of which are measured by gel permeation chromatography; a very low density polyethylene (VLDPE) having a density in the range of 0.885 to 0.915 g / cm 3 ; and optionally at least one ethylene alkyl (meth)acrylate copolymer, where the alkyl group comprises one to four carbon atoms.

This disclosure provides a process. In embodiments, the process comprises contacting a single polymerization catalyst and co-catalyst in a single reactor with (i) an ethylene monomer and an optional C3-C8α-olefin comonomer, (ii) an alkyl-aluminum chain transfer agent, and (iii) an alkyl-zinc chain transfer agent under polymerization conditions at a temperature of 160°C to 250°C. The process is greater than 8.0 10 This involves forming an ethylene-based polymer having a / I2 value and a vinyl content exceeding 50 / 1,000,000C.

The invention discloses an aromatic vinyl polymer material functionalized by Friedel-Crafts reaction, a preparation method thereof, a dielectric film and a capacitor. The material comprises a main chain formed by vinyl monomer polymerization, an aromatic ring substituted side group and a functional group grafted on an aromatic ring through Friedel-Crafts reaction. The preparation method comprises the following steps: carrying out Friedel-Crafts grafting reaction on an aromatic vinyl polymer and a corresponding grafting reactant in an aprotic polar solvent under the catalysis of Lewis acid, and then precipitating, circularly purifying and washing with an acidic alcohol solution to obtain a high-purity product. In the design, aromatic ring conjugation and functional group steric hindrance synergistically improve the rigidity and thermal stability of a molecular chain; in a Friedel-Crafts acylation path, an induction effect of a polar functional group is synergistic with a conjugation effect, so that the dipole moment is remarkably increased, and the prepared dielectric film has a high dielectric constant while maintaining low dielectric loss. The material disclosed by the invention has excellent thermal stability and dielectric property, and is suitable for a new generation of high-temperature-resistant film capacitors.