140 results about "Polymer blend" patented technology

This application provides preservative compositions of pyrithione compounds, organic acids or their salts, and aromatic alcohols, which have a synergistic effect and can reduce the amount of pyrithione required as an effective preservative in end-use formulations.

The invention discloses a dope solution for membrane fabrication comprising a blend of TEP with NMP as a solvent system in a process to make PVDF membranes, where PVDF resin comprises a homopolymer resin, or a copolymer of VDF and at least one of hexafluoroprdpylene, trifluoroethylene, chlorotrifluoroethylene, or a tetrafluoropropene.

The present invention relates to a fat composition comprising at least 30 wt% of stearic acid (C18:0) and at least 45 wt% of saturated fatty acids (SAFA); and wherein the fat composition comprises 1.0 to 8.0 wt% of SSS triglycerides and at most 10.0 wt% of UUU triglycerides, and the weight ratio of S2U triglycerides to SSS triglycerides of the fat composition is 6.0 to 20.0 and the weight ratio of S2O triglycerides to S2L triglycerides is at most 30.0; wherein S is a saturated fatty acid, U is an unsaturated fatty acid, O is oleic acid and L is linoleic acid. The present invention further relates to a fat blend comprising the fat composition as hard stock, wherein the fat blend is further used in a water-in-oil emulsion product, such as a margarine or a spread.

The invention relates to (i) a spinning fluid for flash spinning polyvinylidene fluoride (PVDF) or polyvinylidene fluoride blends from a spin dope comprising dichloromethane and a cyclic hydrofluorocarbon, and (ii) a method for producing a plexifibril of PVDF or PVDF blends using the spinning fluid.

A polymer blend composition including 99.9 to 0.1 weight percent, preferably 99.9 to 10 weight percent, more preferably 99.9 to 30 weight percent of a sulfonated poly(arylene ether), its metal salt, or a combination thereof, preferably the metal salt of the sulfonated poly(arylene ether), and 0.1 to 95 weight percent, preferably 0.1 to 90 weight percent, more preferably 0.1 to 70 weight percent of a poly etherimide; wherein the polymer blend composition has a single glass transition temperature. The polymer blend composition can be used in selectively permeable separation membranes. Alternatively, a selectively permeable separation membrane can include a first polymer layer wherein the polymer is 100 weight percent of a sulfonated poly(arylene ether), its metal salt, or a combination thereof, and a second layer including a polyetherimide, or the blend of the sulfonated poly( arylene ether), its metal salt, or a combination thereof, and the polyetherimide.

This invention discloses a penicillin V potassium capsule and its preparation method. The preparation method includes: preparing modified polylactic acid glycolic acid copolymer microspheres; mixing penicillin V potassium micropowder with the modified polylactic acid glycolic acid copolymer microspheres, adding fumed silica and anhydrous calcium hydrogen phosphate for further mixing to obtain a blend; granulating the blend using a dry granulation method; filling the obtained granules into capsules, polishing, and packaging; and modifying the polylactic acid glycolic acid copolymer with povidone and ethyl cellulose to obtain the modified polylactic acid glycolic acid copolymer microspheres. This invention designs polylactic acid glycolic acid copolymer microspheres that are double-modified with povidone and ethyl cellulose, resulting in better drug loading flowability, more stable mixing uniformity, and significantly improved flowability compared to penicillin V potassium powder. The addition of fumed silica and anhydrous calcium phosphate further enhances antistatic properties and reduces the powder return rate.

A kind of multi-component ultra-high temperature ceramic fiber and its preparation method, belong to continuous ultra-high temperature ceramic fiber preparation technical field.Different from the method for preparing ultra-high temperature ceramic fiber by using the blend of silicon-based ceramic precursor and ultra-high temperature metal component precursor as raw material, the preparation method of the ultra-high temperature metal component precursor can realize the uniform dispersion of multi-component, and the refractory metal component content in the precursor is high, which can effectively improve the temperature resistance grade of the fiber and the high-temperature mechanical properties, oxidation resistance and other properties.The non-fusible treatment of fiber precursor is realized by using a combination of various pre-crosslinking methods, effectively solving the problems of difficult non-fusible treatment of fiber precursor caused by low softening point and few active groups of the precursor, and difficult to obtain shaped ceramic fiber.The ultra-high temperature ceramic fiber prepared by the present application has excellent high-temperature mechanical properties and oxidation resistance, and can be used as a reinforcing material for ultra-high temperature ceramic fiber reinforced ceramic matrix composites.

The application discloses a kind of based on continuous gradual change micro-nano structure's bionic antireflection light-thermal sensing material and its preparation method, method includes the following steps, provide elastic substrate layer, intermediate conductive layer and upper layer heat-sensitive layer;Wherein, elastic substrate layer is high molecular elastic polymer, intermediate conductive layer includes silicone rubber and carbon nanotube blend, upper layer heat-sensitive layer includes silicone rubber, carbon black and carbon nanotube blend;Elastic substrate layer is formed into elastic plane material using heat curing or light curing mode, on its upper surface, spray conductive layer in normal temperature environment, after drying and annealing, obtain solidified intermediate conductive layer;Subsequently, with light-thermal sensitive layer again spraying, after heating and curing, obtain upper layer heat-sensitive layer, the application is through interface bionic structure, the synergic design of conductive material and light-thermal material, effectively improve the light absorption efficiency and response sensitivity of sensing material.

The application discloses a kind of for promoting walnut incision healing and preparation method and application thereof, it is related to walnut cultivation protection technical field.The healing paste is by elastic film-forming base phase 12-35%, high water absorption / water release humidity particle phase 3-12%, hydrophobic water-blocking microphase 5-22%, rheological and interface control phase 1-8%, osmotic pressure and water activity adjustment phase 5-20% and the rest amount of water and preservative etc.composition according to mass percentage;Film-forming base phase includes aqueous polyurethane-acrylate copolymer emulsion and modified polyvinyl alcohol or polyvinyl alcohol-starch blend, humidity particle phase includes crosslinked sodium carboxymethyl cellulose and crosslinked starch or alginate microparticles, hydrophobic microphase includes beeswax, microcrystalline wax, vegetable oil and rosin resin.By preparing each functional phase in turn and assembling in aqueous system, obtain the healing paste suitable for walnut incision protection under different climatic conditions.

The application belongs to the technical field of food packaging materials, and particularly relates to an antioxidant and bacteriostatic food packaging material based on multi-field synergy and gradient ultrasonic and a preparation method thereof, the preparation method comprising the following steps: mixing a metal salt solution with the polyphenol polysaccharide blend to obtain a metal-polyphenol polysaccharide blending system; performing gradient power ultrasonic treatment on the metal-polyphenol polysaccharide blending system, wherein the gradient power ultrasonic treatment comprises at least two ultrasonic stages with gradually increased power; and forming the ultrasonically treated blending system into a gel to obtain the food packaging material. The application has the beneficial effect that two-step addition enables metal ions and polyphenols to form a uniform metal-polyphenol coordination network; and gradient power ultrasonic treatment realizes bubble removal, molecular chain stretching and rearrangement in stages under the premise of protecting the activity of polyphenols, and finally constructs an antioxidant and bacteriostatic food packaging material free of bubble defects and stable in structure.

Living polymers prepared by organolithium initiated polymerization of conjugated diene monomer or copolymerization of conjugated diene and vinyl aromatic monomers are efficiently coupled by using a functionalized siloxane oligomer blend as coupling agent. Diene rubber compositions partially coupled with functionalized siloxane oligomer blends exhibit broad molecular weight distribution, increased throughput in their industrial processing, as well as faster dissolution in recipes to produce rubber toughened plastics such as HIPS and ABS. Radial styrene-butadiene block copolymers as well as their corresponding hydrogenated block copolymers achieved excellent thermoplastic elastomer performance and can be used for hotmelt adhesives, sealants, asphalt modification, footwear; technical compounds, thermoplastic gels, films or elastic fibers.

The invention relates to a biologically degradable polymer fibre made of renewable raw materials with good physical properties, as well as a method for its production and its use. The Polymer blend fibre of the present invention is made from different biopolymers, each being an aliphatic polyester, and is biologically degradable under Home Composting conditions.

This disclosure provides a method. In one embodiment, the method includes the step of preparing pellets of recycled spent material. The recycled spent material is formed from a multilayer structure comprising at least (i) a layer composed of an olefin polymer and (ii) an adhesive layer. The adhesive layer comprises a solvent-free polyurethane adhesive composition. The method includes the step of blending the pellets with an olefin polymer blend component to form a blended material. The method includes the step of forming an article from the blended material. This disclosure also provides an article produced by the method.

This invention relates to a method for preparing a polymer composition, the method comprising the steps of: (a) processing at a temperature T 混合 (a) Mixing the polymer or polymer blend with the azide derivative of formula (I): N3-Ar(I), wherein Ar is a heteroaromatic group, and (b) heating the mixture from step (a) to a temperature T. R T 混合 The glass transition temperature or melting temperature of the polymer used in step (a) is higher than that of the polymer used in step (a), or the highest glass transition temperature or melting temperature of all polymers present in the polymer blend of step (a) at a content of at least 8% by weight relative to the total weight of the blend, T R Equal to or higher than the decomposition temperature of the azide in formula (I), and T 混合 Strictly below T R The present invention also relates to polymer compositions obtained by the method of the present invention. The present invention further relates to the use of the additive N3-Ar of formula (I) for upgrading recycled plastics or mixtures of plastics.

Polymer compositions are disclosed containing at least one high molecular weight polyethylene polymer for producing gel extruded articles. In one embodiment, porous membranes are produced that have an excellent balance of properties including high porosity and high strength characteristics. In one aspect, very thin membranes can be formed having high strength characteristics.

The present invention relates to elastomer materials, and more precisely to an elastomer material blend of at least one polyisoprene polymer and at least one natural or synthetic polymer. The invention also relates to the method for preparing the blend and to the processing thereof by means of an electro-hydrodynamic process or an aero-hydrodynamic process, or to the combination of both processes.

The invention relates to blends from iodopropargyl compound-containing and nitrogen-containing polymers with at least two beta aminoamine functions, to the preparation of these blends and to the use of these blends for the protection of technical materials from destruction by microorganisms, and to the technical materials finished with these blends

The application provides a high-barrier PBAT-based biodegradable film and a preparation method thereof. The preparation method comprises the following steps: melt blending a powdered high-barrier biodegradable polyester and PBAT to obtain a blend and performing film blowing to obtain the high-barrier PBAT-based biodegradable film; wherein the temperature of melt blending is lower than the melting temperature of the high-barrier biodegradable polyester and higher than the melting temperature of the PBAT; during the film blowing process, the temperature of the melt conveying zone is lower than the melting temperature of the high-barrier biodegradable polyester and higher than the melting temperature of the PBAT; and the temperature of the die lip zone is higher than the melting temperature of the high-barrier biodegradable polyester. The preparation method can prepare the PBAT-based biodegradable film with good barrier performance under the condition of a lower content of the high-barrier biodegradable polyester.

This invention relates to the field of road maintenance engineering technology, specifically disclosing a temperature-sensitive composite adhesive and a method for repairing damaged asphalt pavements. The temperature-sensitive composite adhesive uses ordinary emulsified asphalt as a base material, adding SBS modifier, styrene-butadiene rubber, a temperature-sensitive modifier, a stabilizer, and an antioxidant. The temperature-sensitive modifier is a melt blend of polyethylene glycol 4000 and polyethylene glycol 1000; the stabilizer is nano-montmorillonite; and the antioxidant is 2,6-di-tert-butyl-p-cresol. The proportions of the temperature-sensitive modifier and stabilizer are adjusted according to different climatic regions. The repair method using this adhesive includes the following steps: S1 gradient modification pretreatment of the bonding surface, S2 preparation and application of the temperature-sensitive composite adhesive, and S3 interface pressing and curing. The adhesive of this invention exhibits excellent high-temperature stability and low-temperature fluidity, resulting in high flexural and compressive strength of the repaired pavement. The interface is dense with no significant water seepage, meeting the needs for efficient and long-term repair of pavements with different climatic zones and varying degrees of damage, demonstrating good applicability.

The embodiments relate to a polymer blend comprising: a virgin 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 hydrocarbon-based molecule comprising three or more terminal olefin groups; and a recycled ethylene-based polymer having a density of 0.910 g / cc to 0.940 g / cc and a melt index (I2) of 0.3 dg / min to 5 dg / min as measured according to ASTM D1238 (190°C, 2.16 kg). Further embodiments relate to films and articles incorporating the polymer blend.

This document describes personal care compositions comprising surfactant blends, wherein the personal care compositions are free of sulfates and betaine, and wherein the personal care compositions comprise surfactant blends containing anionic surfactants and amphoteric surfactants, as well as at least one preservative. Methods for preparing and using the personal care compositions are also disclosed herein.

Described herein is a polyolefin composite and a method of preparation. The method includes blending a mixture comprising 50 to 94.9 weight percent (wt %) of a matrix polymer, 5 to 40 wt % of a reinforcement polymer; and 1 to 20 wt % of a crosslinked molecule and / or 0.1 to 10 wt % of a nanofiller to provide a blended mixture, wherein the weight percent of each component is with respect to the polyolefin composite; and forming the polyolefin composite from the blended mixture, wherein the matrix polymer is a first polyolefin with a number average molecular weight of at most 300,000, and the reinforcement polymer is a second polyolefin with a number average molecular weight of at least 1,500,000. The polyolefin composite includes the matrix polymer, the reinforcement polymer, and the crosslinked molecule and / or the nanofiller as described aforementioned.

The application relates to the technical field of photovoltaic adhesive films, and discloses an anti-radiation photovoltaic packaging adhesive film, a preparation method thereof and a photovoltaic module. The adhesive film is a multilayer co-extrusion composite structure formed through co-extrusion molding and irradiation, and comprises an upper surface layer, a middle functional layer and a lower surface layer; the upper surface layer is a radiation-resistant polymer matrix (such as EVA-g-St, EVA-g-(alpha-MeSt), POE-g-St or an EVA / POE-aromatic resin blend); the middle functional layer comprises a packaging resin matrix, an anti-radiation agent (a nanoscale radiation protection material such as a rare earth oxide, a heavy metal oxide, a boron-containing compound or a high molecular derivative of a benzotriazole type ultraviolet absorber) and a stabilizer; and the lower surface layer is a bonding surface layer formed by a light-transmitting bonding resin. The adhesive film has good radiation resistance, and the light transmittance, bonding property, elongation at break retention rate, yellowing resistance and module power attenuation resistance of the adhesive film after accelerated irradiation are obviously improved, so that the service life of the module under strong radiation can be prolonged.

A nonwoven fabric having a plurality of fibers bonded together to form a coherent web, wherein the plurality of fibers comprise the formation of a polymer blend of a polypropylene resin and an elastomerous polyolefin, wherein the nonwoven fabric exhibits a reduction in fiber fineness of at least 5% compared to a nonwoven fabric prepared under the same conditions without the elastomerous polyolefin blended with the polypropylene resin.

This invention belongs to the field of high-voltage insulation technology, specifically disclosing a low-conductivity temperature-dependent DC epoxy resin, its preparation method, and its application. The resin comprises the following components by mass fraction: 100 parts of an epoxy resin matrix blend; 40-110 parts of a curing agent; and 0.001-0.1 parts of an accelerator. The epoxy resin matrix blend includes: 80-97 parts of flexible segment epoxy resin as the matrix; and 3-20 parts of Cardo structure fluorene-type epoxy resin containing high rigidity and thermal stability as a modifier. This invention, using the aforementioned low-conductivity temperature-dependent DC epoxy resin, its preparation method, and its application, achieves optimized control of the internal electric field distribution of high-voltage DC insulation under wide temperature range and large temperature difference conditions, thereby improving equipment operational reliability.

This invention discloses a compound modified masterbatch for improving the heat-sealing strength of PLA tea bags and its preparation method, belonging to the field of polymer materials technology. By weight, it comprises the following components: 35-50 parts polylactic acid carrier; 18-28 parts toughening agent; 3-8 parts composite nucleating agent; 1-4 parts crystallization promoter; 2-5 parts interface compatibilizer; and 0.5-2 parts antioxidant. The toughening agent is a blend of polybutylene adipate-terephthalate and polybutylene succinate in a mass ratio of (1.5-2.5):1. The composite nucleating agent is composed of an organophosphate nucleating agent and an acylhydrazine compound in a mass ratio of 1:(0.8-1.5). This invention systematically improves the heat-sealing strength of PLA tea bags from three dimensions—toughening, nucleation, and promotion—from the perspectives of interfacial adhesion, crystal structure, and molecular motion, overcoming the limitations of single modification methods.

This invention relates to the field of polylactic acid (PLLA) technology, specifically to a PSMA / PDLA-modified PLLA composite film and its preparation method. The PSMA / PDLA-modified PLLA composite film of this invention comprises a blend of L-polylactic acid (LMA) and a melt blend of octadecyl methacrylate (OMA) and D-polylactic acid (DMA). The OMA / DMA melt blend is obtained by melt blending OMA, DMA, and an initiator. By introducing the OMA / DMA blend, the SMA homopolymer forms a microphase-separated structure with PLLA. The SMA homopolymer forms a soft phase region, improving the toughness of PLLA. Simultaneously, the stereocomplex formed by the PDLA and PLLA molecular chains "anchors" the PLLA matrix to the soft phase of the SMA homopolymer, thereby improving mechanical properties.

This invention discloses a butyl rubber blend resistant to multiple solvents and its preparation method, belonging to the field of rubber preparation technology. First, brominated butyl rubber is added to a mixer for plasticizing. Then, magnesium oxide, stearic acid, antioxidant RD, antioxidant 4010NA, and a portion of microcrystalline wax are added to the mixer and mixed. Next, fast-extrusion carbon black and thermally pyrolyzed carbon black are added and mixed. Epoxidizing crosslinking agent, the remaining microcrystalline wax, and processing aids are then added and mixed. The mixture is transferred to a two-roll mill and sheeted to obtain masterbatch. Finally, the masterbatch is added to the two-roll mill, rolled, and then vulcanizing resin, zinc oxide, accelerator CZ, and sulfur are added sequentially. Sheeting yields the butyl rubber blend resistant to multiple solvents. The butyl rubber blend provided by this invention possesses excellent resistance to various solvents and superior physical and mechanical properties, meeting the technical requirements of foreign sample comparison tests.

The application discloses a PE adhesive and a gluing process, and belongs to the technical field of adhesives. The PE adhesive comprises chitosan, tannic acid and phenylboronic acid grafted polyethylene, and the mass ratio of the chitosan, the tannic acid and the phenylboronic acid grafted polyethylene is 10:3-4:10-12. The chitosan is added into an acetic acid aqueous solution, stirred and dispersed at 50-65 DEG C to obtain a chitosan solution, tannic acid is added and continuously stirred to obtain a mixed chitosan-tannic acid blend, and the phenylboronic acid grafted polyethylene is added, uniformly mixed, cast into a film, dried, and the PE adhesive is obtained. The application realizes the comprehensive advantages of convenient storage and transportation, process matching, interface strengthening, tough adhesive layer, green environmental protection and controllable cost through the synergistic combination of the phenylboronic acid grafted polyethylene, the chitosan and the tannic acid and the process of dry film preforming, water wetting in-situ activation and hot pressing rapid curing. After hot pressing and curing, the adhesive system can form a firm adhesive layer resistant to boiling water.