92 results about "Decanedioic acid" patented technology

The invention belongs to the technical field of polyurethane elastomers, and particularly relates to a high-static-rigidity high-damping low-pressure-change polyurethane elastomer and a preparation method thereof. Comprising a polyol component and an isocyanate component, and the polyol component comprises polyol A, a chain extender, a stabilizer, a hydrolysis-resistant agent and a catalyst; the isocyanate component is prepared from isocyanate, polyhydric alcohol B and branched chain unit alcohol; the polyol A comprises amine ether polyol and polytetrahydrofuran ether polyol; the polyhydric alcohol B comprises bio-based hydrolysis-resistant polyhydric alcohol and polytetrahydrofuran ether polyhydric alcohol; the bio-based hydrolysis-resistant polyol is prepared by carrying out a reaction on sebacic acid, 1, 2-propylene glycol and 1, 4-butanediol; the branched-chain unit alcohol is prepared from tetrahydrofuran and isooctanol through a reaction. By introducing the bio-based hydrolysis-resistant polyhydric alcohol and branched chain monohydric alcohol, the damping effect is remarkably enhanced, and on this basis, through formula adjustment and raw material screening, the product toughness is greatly improved, the compression set is reduced, and the performance of the product in heavy haul railway application is effectively optimized.

The present disclosure relates to a flexible multi-layered material. An embodiment consistent with the disclosure has a plurality of poly(vinyl chloride)—PVC—layers, wherein at least one of the plurality of PVC layers is a foam layer, wherein each of the layers of the plurality of PVC layers comprises up to 60% (w / w) of a phthalate-free plasticizer, and wherein the phthalate-free plasticizer is selected from the group consisting of: phosphate, trimellitate, adipate, citrate, sebacate, polyester, vegetable oil, and mixtures thereof, and wherein the solubility of the phthalate-free plasticizer in the PVC is at least 13 (J·cm−3)1 / 2.

An environmentally friendly metal cutting oil with high load-bearing and high wear resistance, belonging to the technical field of metal cutting fluids. The cutting fluid is composed of diisooctyl sebacate, phosphate amine salt extreme pressure additives, borate series additives and sulfurized extreme pressure additives, the sulfurized extreme pressure additives are sulfurized fatty acid esters and dialkyl pentasulfide (Rc2540). The load-bearing capacity (Pb) of the cutting oil can reach more than 920N, and the low-load long-wear wear spot diameter (Db) can be less than 0.35 mm.

The invention provides aliphatic polyester and application thereof, the aliphatic polyester comprises dibasic acid residues and dihydric alcohol residues, the dibasic acid residues comprise the following residues: a1) 65-90 mol% of succinic acid residues based on 100 mol% of the total mole percentage of a1) and a2), and a2) 10-20 mol% of dihydric alcohol residues based on 100 mol% of the total mole percentage of a1) and a2); a2), 10-35 mol% of sebacic acid residues based on 100 mol% of the total mole percentage content of a1) and a2); the dihydric alcohol residues are selected from 1, 4-butanediol residues which are at least equal to the dibasic acid residues in molar weight; the aliphatic polyester contains an oligomer of which the number-average molecular weight measured by GPC is less than 1000, and the mass percentage content of the oligomer of which the number-average molecular weight measured by GPC is less than 1000 in the aliphatic polyester is 0.08-3.5 wt%. The packaging film prepared from the aliphatic polyester has good food contact performance and uncoiling performance.

The invention relates to the technical field of high polymer materials and protective coatings, and discloses a single-layer anti-ultraviolet heavy-duty powder coating as well as a preparation method and application thereof. The preparation method of the single-layer anti-ultraviolet heavy anti-corrosion powder coating comprises the following steps: adding carboxyl polyester resin, triglycidyl isocyanurate, modified nano silicon dioxide, modified chitosan, 2-(2H-benzotriazole-2-yl)-4, 6-di-tert-pentylphenol, bis (2, 2, 6, 6-tetramethyl-4-piperidinyl) sebacate, flaky aluminum powder, zinc phosphate, BYK-3920, 2-hydroxy-1, 2, 4-triazole-2-yl)-1, 3, 4-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5-triazole-2-yl)-1, 3, 5- The preparation method comprises the following steps: stirring and mixing 2, 2-diphenylethanone and gamma-aminopropyltriethoxysilane at room temperature at 300-350rpm for 10-15min to obtain a mixture, extruding the mixture through a double-screw extruder at the extrusion temperature of 110-120 DEG C and the screw rotation speed of 450-500rpm, and grinding to obtain the single-layer anti-ultraviolet heavy-duty anticorrosive powder coating. The single-layer anti-ultraviolet heavy anti-corrosion powder coating can be applied to metal base material protection. The coating prepared by the invention has good ultraviolet resistance and corrosion resistance.

The present invention relates to the field of skin cosmetics, and in particular to a soothing, long-lasting, sun-protective isolation cream and its preparation method. The isolation cream's raw materials include butylene glycol, isododecane, polydimethylsiloxane, ethylhexyl salicylate, phenylbenzimidazole sulfonic acid, butyloctanol salicylate, diisopropyl sebacate, diisopropyl adipate, vinyl polydimethylsiloxane / polymethylsilane silsesquioxane crosspolymer, ethylhexyl triazone, p-hydroxyacetophenone, disteardimonium hectorite, aluminum hydroxide, Piper mesenteriae leaf / root / stem extract, Gentiana scabra extract, and water. The isolation cream prepared by the present invention has good soothing, long-lasting, and sun-protective effects, as well as excellent free radical resistance and moisturizing effects. It is easy to apply and can improve skin gloss to a certain extent.

The present invention relates to a cosmetic preparation comprising at least one mineral sunscreen filter, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, polyhydroxystearic acid, isostearic acid, polyglyceryl-2 oleate and polyglyceryl-2 stearate; and the use of the preparation for protection against sunlight.

This invention discloses a method for preparing impact-resistant and cold-resistant polyvinyl chloride (PVC) conduit, belonging to the field of PVC material technology. In this invention, butyl rubber is complexed with dioctyl sebacate and active silica under the initiation of tert-butyl hydrogen peroxide. This complex acts as a flexible dispersed phase in the PVC matrix, effectively absorbing and dissipating impact energy and lowering the glass transition temperature of the material. This allows the conduit to maintain excellent toughness and crack resistance even at low temperatures. Furthermore, it works synergistically with impact modifiers in the system. Ethylene-vinyl acetate copolymer provides elastomer toughening, while maleic anhydride-styrene graft copolymer acts as a highly efficient compatibilizer and interfacial reinforcing agent. The compounded structure forms a toughening network, achieving toughening from molecular chain segment movement to microstructure, thus improving impact strength. Subsequent addition of reinforcing fibers of the same specification further enhances the strength of the conduit. Overall, this results in a PVC conduit with excellent strength, impact and cold resistance, and thermal properties.

The application discloses a manufacturing process of a stamping processing protective film, which comprises the following steps: step one, stirring and mixing zinc oxide, polysebacic acid-decanediol diol and dicyclohexyl carbodiimide at 50-60 DEG C to obtain material A; step two, putting 100 parts of low-density polyethylene with a melt index of 0.5-5 g / 10 min, metallocene linear low-density polyethylene with a melt index of 1.8-2 g / 10 min, oleic acid amide, zinc stearate, stearate and an antioxidant into a mixer, uniformly mixing and then extruding and granulating in a double-screw extruder to obtain material B; step three, putting material A, material B and terpolymer polypropylene into a banbury mixer, discharging after banburying for 10-30 min to obtain a master batch; and step four, blow molding the master batch to obtain a polyethylene base material layer. The protective film improves the elongation at break of the film and also improves the puncture resistance of the protective film.

To provide a non-fire-spreading grease composition with excellent non-flammability and water resistance, and also to provide a bearing or gear containing the non-fire-spreading grease composition.SOLUTION: The non-fire-spreading grease composition according to the present invention comprises the following materials (a) to (d): (a) as a thickening agent, a diurea compound represented by the following formula (1): R1-NHCONH-R2-NHCONH-R3 (1) (wherein R2 represents an aromatic hydrocarbon group having 6 to 15 carbon atoms, and R1 and R3 may be the same or different and represent an aliphatic hydrocarbon group having 8 to 20 carbon atoms or an aromatic hydrocarbon group having 6 to 15 carbon atoms, the proportion of aliphatic hydrocarbon groups in the total of R1 and R3 is 50 to 100 mol%); (b) a base oil having a kinematic viscosity of 300 mm2 / s or more at 40°C; (c) at least one selected from the group consisting of rice wax, carnauba wax, and montanic acid derivatives; and (d) at least one selected from the group consisting of organic sulfonic acid metal salts, sodium sebacate, and glycerin.SELECTED DRAWING: None

The invention belongs to the field of cables, and particularly relates to an aluminum alloy conductor cable suitable for a wind generating set, which sequentially comprises a cable core layer, a reinforcing layer, an insulating layer and a sheath layer from inside to outside, the cable core layer is of a stranded structure and is formed by arranging five layers of round aluminum alloy monofilaments with the diameter of 0.3-0.5 mm in a concentric circle layering mode. The reinforcing layer is an aramid fiber woven layer; the components of the insulating layer comprise ethylene propylene diene monomer, PP / EPDM type thermoplastic dynamic vulcanized rubber, a liquid olefin compatibilizer, a nano talc sheet, a peroxide cross-linking agent, an antiozonant and a flame-retardant smoke suppressant; and the sheath layer comprises the following components: chlorinated polyethylene, diisooctyl sebacate, nano magnesium hydroxide, epoxidized soybean oil, a barium-zinc stabilizer and an anti-UV agent. According to the cable, through an innovative cable core structure and a coating layer material formula, a traditional copper conductor is replaced by a high-cost-performance aluminum alloy conductor, and meanwhile, the performance requirement of wind power generation under a harsh dynamic working condition is met.

The invention provides polyester resin for a self-dusting and high-hardness powder coating as well as a preparation method and application of the polyester resin, and belongs to the technical field of powder coatings. The polyester resin is obtained by mainly polymerizing trimesic acid, N, N-bis (3-aminopropyl) methylamine, 1, 6-hexamethylenediamine, dodecanedioic acid, 2, 5-dimethyl-2, 5-hexanediol, 1, 3-malonic acid, sebacic acid, triethylene glycol, 2, 3-naphthalene dicarboxylic anhydride and the like which are used as main raw materials, and polyester resin 1 and polyester resin 2 which are greatly different in characteristic are respectively prepared by adopting a double-kettle combination mode. And then mixing at high temperature. Good matting and self-frosting effects can be achieved without adding a sand texture agent, and the hardness of a coating film is high.

The invention provides a biodegradable polyester polymer for an adhesive, which is prepared from a polyneopentyl sebacate oligomer, aiming at solving the problem that the existing polymer prepared by using a cancerogen isocyanate or using a polyhydric alcohol or adding a tackifier is non-biodegradable. The invention further provides the biodegradable polyester polymer for the adhesive, which is prepared from the polyneopentyl sebacate oligomer. The biodegradable polyester polymer has excellent solubility and storage stability, and the adhesive composition containing the biodegradable polyester polymer can exhibit excellent adhesive force and peel strength without adding an additional tackifier.

The invention belongs to the technical field of cable sheath materials, and particularly discloses a fireproof radio frequency cable for wireless communication and a preparation method thereof. The invention relates to a fireproof radio frequency cable for wireless communication, which comprises a copper core conductor, a ceramic fiber insulating layer, a copper strip embossing layer, a ceramic non-woven fabric layer, a steel strip wrapping layer, a high-temperature-resistant layer and a cable sheath, comprising the following raw materials: 50-60 parts of nitrile rubber, 22-25 parts of acrylate rubber, 13-16 parts of chlorinated polyethylene, 2-3 parts of a silane coupling agent, 17-19 parts of a composite reinforcing material, 1-2 parts of dioctyl sebacate, 1-3 parts of an antioxidant 1010, 5-8 parts of POE-g-GMA, 3-5 parts of a flame retardant and 2-4 parts of calcium stearate. The composite reinforcing material is composed of a silicon carbide compound, glass composite fibers and titanium dioxide. The durable, weather-proof and flame-retardant outer sheath is obtained, and is suitable for normal work in daily use and severe environments.

The application discloses a cold-resistant PVC conveying belt surface layer material and a light conveying belt and belongs to the technical field of PVC materials. The cold-resistant PVC conveying belt surface layer material comprises the following raw materials in parts by weight: 100 parts of PVC paste resin, 5-24 parts of a cold-resistant agent, 1.5-3 parts of an anti-aging agent, 12-23 parts of a fluorine-containing plasticizer, 3-8 parts of a fluorosilicon resin, 2-7 parts of a polyurethane elastomer, 2-6 parts of a flame retardant, 1-3 parts of nano calcium carbonate, 0.5-1.5 parts of an antioxidant, and 0.6-4 parts of a fluorosilicon surfactant. The cold-resistant PVC conveying belt surface layer material provided by the application can maintain excellent performance in a cold environment. The decanedicarboxylic acid dioctyl ester phase change material releases heat at low temperature, improving the cold resistance of the coating. In addition, the surface layer material is endowed with excellent anti-aging performance through the anti-freezing protection of glycerol, the antioxidant effect of cerium ions and the self-repairing performance of dopamine hydrochloride, so that the conveying belt can maintain stable performance in a low-temperature environment and effectively prolong the service life.

The invention relates to the technical field of high polymer materials, in particular to epoxy modified polyester resin, a preparation method thereof, an adhesive and a composite film. The preparation raw materials of the epoxy modified polyester resin comprise dibasic acid, dihydric alcohol, unsaturated monomers and modified monomers. The binary acid is selected from one or more of terephthalic acid, isophthalic acid, adipic acid, succinic acid, sebacic acid and 1, 4-cyclohexanedicarboxylic acid; the dihydric alcohol is selected from one or more of ethylene glycol, 1, 2-propylene glycol, neopentyl glycol and 1, 4-cyclohexanedimethanol; the unsaturated monomer is selected from one or more of maleic anhydride, itaconic acid and fumaric acid; the modified monomer is selected from glycidyl methacrylate; the number-average molecular weight of the epoxy modified polyester resin is 2500 to 4000; the number-average functionality of epoxy groups of the epoxy modified polyester resin is 3.5 to 4.5. The adhesive prepared from the epoxy modified polyester resin is resistant to high-temperature cooking and high in safety, has high bonding strength and flexibility, and is suitable for large-scale industrial production.

The application discloses a kind of polysebacic acid terephthalate, polyester composition and its preparation method and application.The weight average molecular weight of the polysebacic acid terephthalate is 70000~155000, and the intrinsic viscosity is 1.20~1.45 dL / g.The specific weight average molecular weight and intrinsic viscosity of the polysebacic acid terephthalate can significantly improve the deformation resistance and stiffness of the film made of polyester composition in the case of high addition amount in polyester composition.

This invention relates to the field of polymer materials and protective coatings, and discloses a single-layer UV-resistant heavy-duty anti-corrosion powder coating, its preparation method, and its application. The preparation method of the single-layer UV-resistant heavy-duty anti-corrosion powder coating includes: carboxyl polyester resin, triglycidyl isocyanurate, modified nano-silica, modified chitosan, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-amylphenol, bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate, flake aluminum powder, and phosphorus... Zinc sulfate, BYK-392, 2-hydroxy-1,2-diphenyl ethyl ketone, and γ-aminopropyltriethoxysilane were mixed at room temperature with stirring at 300-350 rpm for 10-15 minutes to obtain a mixture. This mixture was then extruded using a twin-screw extruder at 110-120°C and a screw speed of 450-500 rpm. The mixture was then ground to obtain a single-layer UV-resistant heavy-duty anti-corrosion powder coating. This single-layer UV-resistant heavy-duty anti-corrosion powder coating can be applied to the protection of metal substrates. The coating prepared by this invention has excellent UV resistance and anti-corrosion properties.

An aliphatic or aliphatic-aromatic thermoplastic polyester resin is modified in the presence of a peroxide in an aqueous dispersion of the aliphatic or aliphatic-aromatic thermoplastic polyester resin at a temperature that is equal to or lower than a one-minute half-life temperature of the peroxide and that is in a range of 0 to 100° C. The resin may be a poly(3-hydroxyalkanoate) resin, polybutylene adipate terephthalate, polybutylene succinate adipate, polybutylene succinate, polybutylene sebacate terephthalate, polybutylene succinate adipate terephthalate, polycaprolactone, or polylactic acid.

The present invention relates to a method for producing a water-in-oil emulsion for cosmetics, in which a glycerol-in-oil emulsion is mixed with water in a storage container and shaken or stirred, the invention relates to a composition comprising a glycerol-in-oil emulsion comprising: a) glycerol, b) one or more lipids that are liquid at room temperature and atmospheric pressure, c) one or more waxes, d) one or more salts, e) polyglycerol-4 diisostearate / polyhydroxystearate / sebacate that has been emulsified at room temperature (INCI: polyglycerol-4 diisostearate / polyhydroxystearate / sebacate).

The present invention provides a rolling bearing which exhibits an elastic behavior, is enclosed with a specific grease composition exhibiting excellent lubricating properties with respect to resins and metals, and has a specific cage, and provides a rolling bearing and a motor incorporating the same, the rolling bearing having excellent life characteristics even at high temperatures exceeding 100 DEG C. A rolling bearing and a motor including the same. The rolling bearing includes: an inner ring; an outer ring disposed on the outer peripheral side of the inner ring so as to be coaxial with the inner ring; a plurality of rolling bodies disposed between the inner ring and the outer ring; the retainer is used for retaining the rolling bodies; and a grease composition held between the inner ring and the outer ring, the grease composition including a base oil, a thickener, an ionic liquid, and a sebacic acid disodium salt, the grease composition having a viscosity in a dynamic viscoelasticity measurement using a rotary rheometer, the viscosity in the grease composition being greater than the viscosity in the dynamic viscoelasticity measurement using the rotary rheometer, and the viscosity in the grease composition being greater than the viscosity in the dynamic viscoelasticity measurement using the rotary rheometer. A crown-shaped retainer made of a resin, the crown-shaped retainer comprising a resin selected from the group consisting of polyparaphthaloyl azelamine (PA9T), polyamide 46 (PA46), and polyetheretherketone (PEEK) resins, the crown-shaped retainer having a storage modulus of 2400 Pa or more at 25 DEG C as measured under the conditions of a film thickness of 0.5 mm, a shear strain of 1%, and a frequency of 1 Hz, the crown-shaped retainer comprising a resin selected from the group consisting of polyparaphthaloyl azelamine (PA9T), polyamide 46 (PA46), and polyetheretherketone (PEEK) resins.

The present invention provides a working electrolyte for medium and high voltage aluminum electrolytic capacitors and a preparation method thereof, belonging to the technical field of capacitor preparation. The working electrolyte uses ammonium sebacate as the main solute, alkylammonium sebacate as the secondary solute, polyvinyl alcohol and ethylene glycol as the polymer additives, and at least one of ammonium hydrogen azelate, ammonium dodecanedioate, and ammonium pentaborate as the auxiliary solute. During the preparation process, a polymer is added to control the boiling temperature and heat preservation time of the electrolyte, and the reaction between the polymer additive and the solvent is utilized to enhance the dissolution ability of the polymer; the adsorption of polymers with different molecular chain lengths and polymer molecules containing different types of functional groups on the anode foil is utilized to enhance the ability to repair the defects on the anode surface during the operation of the capacitor. The present invention mainly improves the stability of the working electrolyte for medium and high voltage aluminum electrolytic capacitors and enhances the comprehensive performance of the capacitor by adjusting the electrolyte formula and boiling process.

The invention discloses a high-adhesion bio-based polyurethane hot melt adhesive and a preparation method thereof. Preparation raw materials of the adhesive comprise the following components in parts by weight: 10 to 30 parts of isocyanate, 5 to 20 parts of polyether glycol, 10 to 40 parts of polyphthalic anhydride-diethylene glycol ester glycol, 10 to 40 parts of polysebacic acid 3-methyl-1, 5-pentanediol ester glycol, 15 to 40 parts of bio-based polyol, 10 to 20 parts of tackifying resin, 0.05 to 0.5 part of a catalyst and 10 to 20 parts of a filler. The high-adhesion bio-based polyurethane hot melt adhesive can be obtained by mixing and reacting the raw materials in parts by weight. The performance of the high-adhesion bio-based single-component moisture curing reaction type polyurethane edge sealing hot melt adhesive can meet the use requirements of clients, the use of petroleum-based raw materials is effectively reduced, bio-based raw materials are introduced, and effective support is provided for reproducibility and degradability. The product is suitable for bonding various plates with PVC, PET and other edge sealing materials in the fields of furniture, building materials and the like, and has the characteristics of high initial adhesion, rapid curing, damp and heat resistance and degradability.

A glove dipping solution and a method for preparing bio-based gloves are provided. The gloves maintain desirable mechanical properties while incorporating a high proportion of bio-based plasticizers. The glove dipping solution comprises polyvinyl chloride, one or more selected bio-based plasticizers chosen from bio-succinic acid, bio-sebacic acid, laurate esters, glycerol tristearate, diethylene glycol laurate, dodecyl laurate, dibutyl laurate, propylene glycol diacetate, sorbitol diacetate, succinic diacetate, diethylhexyl succinate, epoxidized soybean oil, 1,2-epoxy-3-propyl-1,2,3-triestearoyl glycerol, and 1,3-epoxy-2-propyl-1,2,3-triestearoyl glycerol. The bio-based plasticizer content ranges from 25 weight percent to 41 weight percent of the total weight of the glove dipping solution, excluding volatile solvents. The solution includes one or more functional auxiliary materials such as plasticizers, stabilizers, thickeners, and opacifiers. The invention also provides bio-based gloves produced from this dipping solution, which exhibit tensile breaking strengths exceeding 7 MPa, elongation at break rates over 300%, and palm thicknesses ranging from 0.03 millimeters to 0.2 millimeters.

The application provides an oil-resistant and low-temperature-resistant flame-retardant polyvinyl chloride elastomer plastic and a preparation method and application thereof, and the preparation raw material of the oil-resistant and low-temperature-resistant flame-retardant polyvinyl chloride elastomer plastic comprises the following components in parts by weight: polyvinyl chloride resin 50-70 parts, polyvinyl chloride grafted dioctyl sebacate 30-50 parts, flame retardant 23-38 parts, calcium-zinc stabilizer 6-8 parts, plasticizer 20-40 parts, lubricant 0.5-1 part; the flame retardant comprises antimony trioxide 5-8 parts, zinc borate 5-10 parts, silane coupling agent modified glass powder 5-8 parts and silane coupling agent modified wollastonite fiber 8-12 parts. The polyvinyl chloride elastomer plastic provided by the application can meet the requirements of low-temperature resistance, oil resistance and flame retardation at the same time by introducing polyvinyl chloride grafted dioctyl sebacate and a specific flame retardant system.

Described herein is a polyamide (PA) that exhibits a glass transition temperature (Tg) of at least 170°C and includes repeating units formed by polycondensation of a diamine component (A) and a dicarboxylic acid component (B), wherein the diamine component (A) includes a) 48.0 to 95.0 mol % of MACM and b) 5.0 to 52.0 mol % of PACM, these percentages in mol % being based on the total amount of diamines in the diamine component (A); and the dicarboxylic acid component (B) includes c) 28.0 to 55.0 mol % of isophthalic acid and d) 45.0 to 72.0 mol % of a dicarboxylic acid (DA) selected from the group consisting of nonanedioic acid, decanedioic acid, and combinations thereof, these percentages in mol % being based on the total amount of dicarboxylic acids in the dicarboxylic acid component (B).

Biodegradable controlled release agent implants and methods of making and using thereof, are preferably formed of poly(ω-pentadecalactone-co-p-dioxanone) [poly(PDL-co-DO)] or poly(ethylene brassylate-co-dioxanone), a family of polyester copolymers that degrade slowly in the presence of water. The material is suitable as the basis of a biodegradable controlled agent release implant that provides sustained release of a therapeutic such as an antiviral, thereby significantly increasing patent compliance and efficacy. Results show long term co-administration of agents having greater than additive efficacy. The implant may be inserted subcutaneously, allowing degradation over a period of up to about 18 or 24 months, eliminating the need for removal by a trained practitioner.

The invention provides aliphatic polyester, a polyester composition containing the aliphatic polyester and application of the aliphatic polyester. The aliphatic polyester comprises dibasic acid residues, dihydric alcohol residues and branching agent residues. The diacid residues comprise the following residues: a1) 71-89 mol% of succinic acid residues based on 100 mol% of the total mole percentage content of a1) and a2); a2), 11-29 mol% of sebacic acid residues based on 100 mol% of the total mole percentage of a1) and a2); the dihydric alcohol residues are selected from 1, 4-butanediol residues which are at least equal to the dibasic acid residues in molar weight; when the total mass of the aliphatic polyester is 100 wt%, the mass percentage content of the branching agent residues is 0.09-0.22 wt%. The aliphatic polyester solves the problem of low heat sealing strength of aliphatic polyester.

[Problem]Provided is a rolling bearing filled with a specific grease composition exhibiting elastic behavior and having excellent lubricating properties to resins and metals, the rolling bearing having a specific retainer. Also provided is a rolling bearing having excellent lifetime characteristics even under a high-temperature environment exceeding 100°C, as well as a motor incorporating the bearing. [Solution]A rolling bearing including an inner ring; an outer ring disposed coaxially with the inner ring on an outer peripheral side of the inner ring; a plurality of rolling elements disposed between the inner ring and the outer ring; a retainer holding the rolling elements; and a grease composition held between the inner ring and the outer ring. The grease composition contains a base oil, a thickener, an ionic liquid, and disodium sebacate; the grease composition has, in dynamic viscoelasticity measurement using a rotational rheometer as measured under conditions of a film thickness of 0.5 mm, a shear strain of 1%, and a frequency of 1 Hz, a storage elastic modulus of 2400 Pa or more at 25°C; and the retainer is a resin-made crown-shaped retainer made of a resin selected from the group consisting of polynonamethylene terephthalamide (PA9T), polyamide 46 (PA46), and polyetheretherketone (PEEK) resins. And a motor including the rolling bearing.

The invention discloses a low-shrinkage PA-ABS (polyamide-acrylonitrile-butadiene-styrene) alloy material and a preparation method thereof, the composition is prepared from the following components in parts by mass: 35-48 parts of polyhexamethylene adipamide matrix resin and 5-12 parts of polycaprolactam matrix resin; 25 to 38 parts of an acrylonitrile-butadiene-styrene copolymer; 3 to 6 parts of an ethylene-ethyl acrylate-maleic anhydride (E-EA-MAH) terpolymer; 0.8 to 2.2 parts of composite reinforcing filler; 0.3 to 0.9 part of a light stabilizer bis [2, 2, 6, 6-tetramethyl-4-piperidyl] sebacate; 0.1 to 0.5 part of a release agent ethylene bis stearamide; and 1.2 to 2.8 parts of an interface compatibilizer. According to the invention, through multi-component collaborative design and interface engineering regulation and control, a multi-layer interaction network is constructed, a terpolymer containing an epoxy group and a block structure compatibilizer are further introduced, interface reaction and energy dissipation between PA and ABS are promoted, and through nanoscale gradient interface design of a release agent and a filler, the release agent and the filler are combined, so that the release agent and the filler are combined, and the release agent and the filler are combined. And the interface friction and residual stress in the forming process are obviously reduced.