371 results about "Dynamic viscoelasticity" patented technology

The invention relates to the field of optical protection materials, and provides a transparent film with laser eavesdropping prevention performance and a preparation method thereof.The transparent film is composed of surface-modified doped tungsten oxide nanosheets, amino-isocyanate bifunctional lithium niobate nanowires, urethane acrylate, an ultraviolet light absorber, a silane coupling agent, a dispersing agent and a flatting agent; the molybdenum-doped tungsten oxide nanosheets are obtained through silane coupling modification after hydrothermal synthesis, and the lithium niobate nanowires are prepared through a gradient modification process of hydrothermal synthesis-silane coupling-isocyanate grafting-phenol end capping. A modified nano material is uniformly dispersed in a resin matrix through an ultrasonic dispersion composite technology, and through blade coating forming, ultraviolet curing and constant-temperature and constant-humidity post-treatment, compared with the prior art, the scheme overcomes the problems that a traditional protective film is insufficient in optical transparency, laser eavesdropping prevention function and dynamic viscoelasticity, and is suitable for the field of high-end security and protection.

To provide a method for producing a composite for a secondary battery electrode having excellent electrical conductivity by precisely controlling the dispersion state of fibrous carbon on an active material.SOLUTION: A method for producing a composite for a secondary battery electrode containing an electrode active material and fibrous carbon includes a step of combining an electrode active material and a fibrous carbon dispersion in which the fibrous carbon is dispersed in a solvent in a non-slurry state by using a mechanochemical mixer, and a step of removing the solvent and drying the composite. The fibrous carbon dispersion contains fibrous carbon, a dispersant, and a solvent. The dispersant contains a copolymer A containing a nitrile-group-containing structural unit and an aliphatic hydrocarbon structural unit. The Mooney viscosity (ML1+4,100°C) of the copolymer A is 10 to 70, and the phase angle of the fibrous carbon dispersion at a frequency of 1 Hz measured by dynamic viscoelasticity measurement is 19° or more.SELECTED DRAWING: None

A binder component for a feedstock compound for use in a shaping and sintering process comprises b-i) 3 to 70% by volume of at least one first thermoplastic and / or wax-type material, and b-ii) 30 to 97% by volume of at least one second thermoplastic and / or wax-type material, based on the total volume of the binder component b). The first thermoplastic and / or wax-type material and the second thermoplastic and / or wax-type material differ in at least one property which property is selected from (1) solubility in a solvent, (2) degradability induced by heat and / or a reactant, and (3) volatility. The first thermoplastic and / or wax-type material is less soluble, less degradable or less volatile than the second thermoplastic and / or wax-type material. Tcross is higher by not more than 60 K than TP, wherein TP is the DSC melt peak temperature of the binder component b), and Tcross is the temperature at the intersection between the storage modulus G′ curve and the loss modulus G″ curve in a dynamic viscoelasticity measurement of the binder component b). The feedstock compound containing the binder component and non-organic sinterable particles is used in an additive manufacturing process, an injection molding process, a pressing process or a casting process.

The present invention provides a pressure-sensitive adhesive composition suitable for forming a pressure-sensitive adhesive sheet having a smooth surface. The pressure-sensitive adhesive composition of the present invention includes a β-1,3-glucan derivative G. The pressure-sensitive adhesive composition has a tan δ of 0.7 or more at 200° C. as determined by the following test. Test: a disc-shaped evaluation sample is produced from a pressure-sensitive adhesive composition. The evaluation sample is subjected to a dynamic viscoelasticity measurement to determine a tan δ thereof at 200° C.

Provided is a biaxially oriented polypropylene film which, even during heating or even at the time of completion of the heating, changes little in length along the width direction of the film. The biaxially oriented polypropylene film is characterized in that in a dynamic viscoelasticity measurement, a minimum value of the loss modulus at 25-75°C is 0.26 GPa or greater.

The present invention relates to a polishing pad including a polishing layer and a cushion layer, wherein a ratio E′B40 / E′C40 of a storage elastic modulus at 40° C. in dynamic viscoelasticity measurement performed under a bending mode condition with a dry state, a frequency of 10 rad / s, and 20 to 100° C., E′B40, to a storage elastic modulus at 40° C. in dynamic viscoelasticity measurement performed under a compression mode condition with a dry state, a frequency of 10 rad / s, and 20 to 100° C., E′C40, is 3.0 or more and 15.0 or less, and a loss factor tan δ in the dynamic viscoelasticity measurement performed under the bending mode condition is 0.10 or more and 0.30 or less in a range of 40° C. or more and 70° C. or less.

A polishing pad contains: a polishing layer having a polishing surface for polishing a workpiece; and a cushion layer disposed on the side of the polishing layer opposite from the polishing surface. With regard to the ratio (tan δ) of the storage elastic modulus E′ to the loss elastic modulus E″ of the whole polishing pad, as obtained through dynamic viscoelasticity measurement using frequency dispersion (25° C.) in a bending mode, the ratio of the maximum value of tan δ measured at 100-1000 rad / s (tan δmax100-1000) to the maximum value of tan δ measured at 1 to 10 rad / s (tan δmax1-10) is 0.75 to 1.30.

The purpose of the present invention is to provide a polyester film and a hard coat film for a surface protection film for a folding-type display, the polyester film having excellent heat resistance and being less susceptible to creasing, the polyester film having excellent mass productivity and suppressing the occurrence of image disorder in a folded portion after repeated bending. The present invention relates to a polyester film having a tan [delta] of 0.020 or less at 65 DEG C as determined by dynamic viscoelasticity measurement by stretching in at least one of the longitudinal direction and the width direction.

To provide an adhesive composition that is usable for multi-stage curing which can obtain excellent adhesive physical properties in a low crosslinked state after primary curing, can be efficiently cured even with a small quantity of an active energy ray in curing, and is excellent in adhesive physical property, reliability and shape stability after final curing.SOLUTION: An adhesive composition contains an acrylic resin (A) and a photopolymerization initiator (B), wherein a glass transition temperature calculated from dynamic viscoelasticity of the acrylic resin (A) is 12 to 40°C, and the adhesive composition has a structural unit derived from alkyl (meth)acrylate (a1) having an alkyl group having 5 or more carbon atoms, and a structural unit derived from an amide group-containing ethylenically unsaturated monomer (a3).SELECTED DRAWING: None

To provide an adhesive tape which can reduce adhesion enhancement due to high temperatures and can also be used for a material which does not transmit light.SOLUTION: There is provided an adhesive tape having an adhesive layer, wherein the adhesive layer has a shear storage modulus of 4.0×104 to 1.0×106 Pa at 25°C as evaluated by dynamic viscoelasticity measurement and the adhesive layer has a contact angle to water of 80 degrees of more after the adhesive layer side of the adhesive tape is attached to glass, heated at 220°C for 120 minutes and peeled off.SELECTED DRAWING: None

This polyester heat-shrinkable film in which dynamic viscoelasticity before and after shrinkage is adjusted to within a specific range may have an improved shrinkage rate and shrinkage uniformity at high temperatures. Therefore, the heat-shrinkable film can be applied to packaging and labeling of containers or bottles to improve quality.

A heat-shrinkable polyester film is provided, in which the loss coefficient and the like are controlled in a plurality of temperature regions, and which has excellent wrinkle resistance characteristics. The heat-shrinkable polyester film is a heat-shrinkable polyester film derived from a polyester resin composition containing 30% to 90% by weight of an amorphous polyester resin and 10% to 70% by weight of a crystalline polyester resin with respect to the total amount, in which (a) a loss coefficient obtained using a dynamic viscoelasticity measuring apparatus has a first loss coefficient peak in a temperature region of below 100° C.; (b) a loss coefficient obtained in the same manner has a second loss coefficient peak in a temperature region of 100° C. or higher; and (c) a heat shrinkage ratio obtained when the film is immersed in hot water at 80° C. for 10 seconds is 30% or more.

An electronic device encapsulation composition according to the present invention is for an inkjet and contains a photopolymerizable monomer and a photopolymerization initiator, the composition containing a (meth)acrylate as the photopolymerizable monomer, and, as regards the dynamic viscoelasticity after curing of the electronic device encapsulation composition, the loss factor (tanδ) peak value is in the 0.3-1.0 range and the storage modulus (G') is in the 1.0-3.0 GPa range.

The purpose of the present disclosure is to provide a coating composition that exhibits excellent discharge stability. A coating composition according to the present disclosure has the following features.　The coating composition contains a hydroxy group-containing resin (A) and a curing agent (B), and is to be applied to an object to be coated by an inkjet method. When a dynamic viscoelasticity measurement is performed thereon at a temperature of 23°C and a frequency of 0.5 Hz in a stress measurement range of 0.1-20 Pa, the stress σ2 as measured when the storage elastic modulus has decreased by 10% for the first time with respect to the storage elastic modulus G'1 when the stress is 0.1 Pa is in a range of 1.0-15 Pa.

To provide a quantitative sealant evaluation method for selecting an optimum primer that can ensure long-term reliability of waterproofing of joints on the exterior walls of buildings. [Solution] The evaluation method for sealant 10 includes the following steps: a first step of evaluating the adhesion between adherend 11 and primer 12, and the adhesion between primer 12 and sealant 10, for each temperature condition using a movement test on test specimen 1; a second step of determining the tensile stress as a mechanical property of sealant 10 using a static tensile test and determining the complex modulus of tensile deformation of sealant 10 using a dynamic viscoelasticity test; a third step of determining a relationship diagram between the tensile stress of sealant 10 determined in step 2 and the complex modulus of tensile deformation of sealant 10; and a fourth step of judging the suitability of primer 12 using the relationship diagram determined in step 3, based on the adhesive peel strength of primer 12 assuming the usage environment obtained from steps 1 and 2.

An object of the present disclosure is to provide a rubber composition which comprises a hydrogenated carboxy-modified acrylonitrile-butadiene rubber as a base rubber and from which a crosslinked rubber having excellent mechanical strength and a great friction coefficient is obtained even if the rubber composition is vulcanized at a high temperature. The present disclosure provides a grip rubber composition comprising a base rubber, a vulcanizing agent and a vulcanization accelerator, wherein the base rubber contains a hydrogenated carboxy-modified acrylonitrile-butadiene rubber, the rubber composition comprises a thiuram based vulcanization accelerator in an amount of 4 parts by mass or more, a sulfenamide based vulcanization accelerator in an amount of 0.3 part by mass or more, and a thiourea based vulcanization accelerator in an amount of 0.1 part by mass or more with respect to 100 parts by mass of the base rubber, and a crosslinked rubber obtained by curing the rubber composition at a vulcanizing temperature of 185° C. has a loss coefficient (tan δ) and a complex elastic modulus (E*) (MPa) at a temperature of 25° C. in a ratio (tan δ / E*) ranging from 0.027 to 0.052, wherein the loss coefficient (tan δ) and the complex elastic modulus (E*) (MPa) at the temperature of 25° C. are measured with a dynamic viscoelasticity measuring apparatus (an oscillation frequency: 10 Hz, a strain amplitude: 0.05%, and a tensile mode).

The present invention provides an adhesive sheet having a photocurable adhesive layer, wherein the photocurable adhesive layer exhibits photocurability suitable for a reduction in peel strength due to light irradiation and is based on a polymer that does not utilize solution polymerization. [Solution] Provided is an adhesive sheet having an adhesive layer that is cured by light irradiation. The total content of the azo-based polymerization initiator and the peroxide-based polymerization initiator in the adhesive layer is 1.0 [mu] g / g or less. The adhesive sheet has a storage modulus increase rate of 300% or more as determined by the following formula. The storage modulus increase rate [%] = (R / Q-1) * 100 (wherein Q and R are storage modulus G '([Pa]) at 25 DEG C as determined by dynamic viscoelasticity measurement, Q is initial storage modulus G' measured using a measurement sample obtained from the adhesive layer, and R is post-curing storage modulus G 'measured after curing by irradiating the measurement sample with ultraviolet light).

The purpose of the present invention is to provide an adhesive tape having excellent adhesive force in a high-temperature environment. The purpose of the present invention is also to provide an adhesive composition having excellent adhesive force in a high-temperature environment. The present invention is an adhesive tape having an adhesive layer, the adhesive layer containing an acrylic copolymer, the shear storage modulus of the adhesive layer at 150 DEG C measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz being 8.0 * 104 Pa to 3.0 * 105 Pa, and the shear storage modulus of the adhesive layer at 150 DEG C being 3.0 * 105 Pa to 3.0 * 105 Pa. The loss tangent (tan [delta]) at 150 DEG C as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz is 0.10-0.40 (inclusive).

To provide a method for using to an adherend, a polyester shrink film suppressed in a loss coefficient or the like in a plurality of temperature ranges, and excellent in wrinkle resistance characteristic.SOLUTION: A method for using to an adherend, a polyester shrink film which is derived from a polyester resin composition containing 30-90 wt.% of an amorphous polyester resin, and 10-70 wt.% of a crystalline polyester resin based on the entire amount is such that: (a) a first loss coefficient peak is in a temperature range of less than 100°C in a loss coefficient obtained by using a dynamic viscoelasticity measuring apparatus; (b) a second loss coefficient peak is in a temperature range of 100°C or more in a loss coefficient obtained similarly; and (c) a thermal shrinkage is 30% or more at the time of immersion in hot water at 80°C for 10 seconds.SELECTED DRAWING: Figure 2

An electrostatic charge image developing toner, an electrostatic charge image developer, a toner cartridge, a process cartridge, an image forming apparatus, and an image forming method, the electrostatic charge image developing toner having toner particles containing an amorphous resin and a crystalline resin as binder resins, and an external additive, the external additive contains inorganic particles having a specific gravity of 1.3-2.0, and in a dynamic viscoelasticity measurement when the temperature of the toner particles is reduced from 110 DEG C to 30 DEG C, the ratio of a loss tangent tan [delta] (80) at a temperature of 80 DEG C to a loss tangent tan [delta] (60) at a temperature of 60 DEG C, namely tan [delta] (80) / tan [delta] (60), is 0.90-1.40, and the loss tangent tan [delta] (80) at a temperature of 80 DEG C is 1.20-1.70.

The purpose of the present invention is to provide an adhesive sheet which is obtained by ultraviolet curing and has excellent impact resistance. Another purpose of the present invention is to provide a method for producing a laminate having the adhesive sheet. The present invention is an adhesive sheet which is a cured product of an adhesive composition containing a photopolymerization initiator and which is characterized in that in a viscoelasticity graph obtained by dynamic viscoelasticity measurement under the conditions of a shear method, a measurement temperature of-70 DEG C to 200 DEG C, and a frequency of 1 Hz, Ggtemp represents the temperature at which the loss modulus at the lowest-temperature side reaches the maximum value, and Ggtemp represents the temperature at which the loss modulus at the lowest-temperature side reaches the maximum value, and Ggtemp represents the temperature at which the loss modulus at the lowest-temperature side reaches the maximum value. When Tg is the temperature on the lowest side among the temperatures at which tan [delta] reaches the maximum in a region higher than the Ggtemp, GF1temp is the temperature on the lowest side among the temperatures at which the ratio of the storage modulus to the loss modulus reaches the minimum in a temperature region from Tg to 50 DEG C (inclusive), and GF1temp is the temperature on the lowest side among the temperatures at which the ratio of the storage modulus to the loss modulus reaches the minimum. When the lowest temperature among the temperatures at which the loss tangent reaches the minimum value in a region higher than the GF1temp is defined as GF2temp, and the loss tangent at the GF2temp is defined as GF2tan [delta], the temperature difference between the Ggtemp and the GF1temp is 25.0 DEG C or more, and the GF2tan [delta] is 0.34 or more.

The present invention provides a method for using a polyester shrink film with excellent wrinkle resistance, in which the loss factor and other properties are controlled over a plurality of temperature ranges, on an adherend. A method for using a polyester shrink film derived from a polyester resin composition containing, relative to the total weight, 30 to 90% by weight of an amorphous polyester resin and 10 to 70% by weight of a crystalline polyester resin, the polyester shrink film having (a) a first loss factor peak in a temperature range below 100°C in a loss factor measured using a dynamic viscoelasticity measuring device, (b) a second loss factor peak in a temperature range of 100°C or higher in a loss factor measured in a similar manner, and (c) a heat shrinkage rate of 30% or more when immersed in 80°C warm water for 10 seconds.

Provided is a binder composition for a power storage device with which it is possible to fabricate a power storage device electrode that has excellent adhesion and in which electrode expansion associated with repeated charging / discharging is suppressed, and to improve cycle service-life properties of the power storage device.　A binder composition for a power storage device according to the present invention contains a polymer (A) and a liquid medium (B), the polymer (A) containing, when the total of repeating units included in the polymer (A) is 100 parts by mass, 50-80 parts by mass of a repeating unit (a1) derived from a conjugated diene compound, 15-49 parts by mass of a repeating unit (a2) derived from an aromatic vinyl compound, and 0.1-10 parts by mass of a repeating unit (a3) derived from unsaturated carboxylic acid. The tan δ of the dynamic viscoelasticity of the polymer (A) (loss modulus / storage modulus) has one peak top in the range of -50℃ to 10℃ inclusive, and one peak top in the range of 150℃ to 250°C inclusive. When the tan δ of the peak top in the range of -50℃ to 10℃ inclusive is tan δ (Tp1) and the tan δ of the peak top in the range 150℃ to 250°C inclusive is tan δ (Tp2), the relationship of expression (1) is satisfied.　(1): tan δ (Tp2) / tan δ (Tp1) < 0.5

To provide a polymer composition for an electrochemical element capable of providing a conductive material composition with good dispersibility.SOLUTION: Provided is a polymer composition for an electrochemical element, the polymer composition comprising: a polymer including an aliphatic hydrocarbon unit and a nitrile group-containing unit; and an amide-based liquid medium, where the polymer has a tan δ (loss tangent) of more than 1 in the strain range of 0.01-10% in dynamic viscoelasticity measurement at a temperature of 100°C and a frequency of 10 Hz.SELECTED DRAWING: Figure 1

To provide an adhesive composition which is excellent in 180-degree peel adhesive force, constant load holding power and shear retention force among adhesive characteristics and has high removability and to provide an adhesive tape having an adhesive layer composed of the adhesive composition.SOLUTION: In order to exhibit favorable adhesive properties in an adhesive composition, it is crucial to adjust the dynamic viscoelasticity of the adhesive composition among various physical properties and it was found that the storage modulus G' strongly correlates with shear holding force performance and tanδ strongly correlates with constant load holding power performance. Specifically, it is necessary for the storage modulus G' at a constant temperature to be above a certain value in order to achieve an adhesive layer having excellent shear retention force and it was found that it is necessary for the tanδ at a constant temperature to be equal to or above a certain value in order to achieve an adhesive layer having excellent constant load holding power.SELECTED DRAWING: None

To provide a branched propylene-based polymer that is excellent in ductility when melting, while retaining melt tension necessary for molding. A branched propylene-based polymer comprising propylene and 0 mol % to 11 mol % of ethylene and an α-olefin containing 4 or more carbon atoms, and having the following properties (1) to (4): property (1): MFR is from 0.1 g / 10 min to 100 g / 10 min; property (2): Mz / Mw is from 2.5 to 4.0; property (3): a branching index g' (100×104) is from 0.60 to 0.75; and property (4): a flow activation energy (Ea) kJ / mol obtained by measuring dynamic viscoelasticity and MFR satisfy the following formula (1): [Formula (1): Ea ≥ -12.5 × log(MFR) + 66].

An electrostatic image developing toner, an electrostatic image developer, a toner cartridge, a process cartridge, and an image forming apparatus and method. The toner includes toner particles including an amorphous polyester resin and a crystalline resin, the toner particles including, as the amorphous polyester resin, an amorphous polyester resin (S) having at least one of a structural unit derived from an aliphatic dicarboxylic acid represented by formula (A) and a structural unit derived from an aliphatic diol represented by formula (B), the ratio of the total of the two types of structural units in the total of all structural units constituting the amorphous polyester resin is 0.5% to 10.0% in terms of molar ratio, and the toner particles have a minimum value tan [delta] (min) of loss tangent of 0.50 to 1.00 at 50 to 80 DEG C in a dynamic viscoelasticity measurement when the temperature is raised from 30 DEG C to 120 DEG C in the toner particles. And nA and nB each independently represent an integer of 2-12 (inclusive).

Provided are an electromagnetic wave shielding material including a magnetic layer containing magnetic particles and a resin, between two metal layers, in which a loss tangent Tan δ of the magnetic layer in a dynamic viscoelasticity measurement at 1 Hz is less than 0.35 in a temperature range of 0° C. to 70° C., and an electronic component and an electronic apparatus including the electromagnetic wave shielding material.

The invention relates to the technical field of semiconductor manufacturing, and discloses a wafer polishing treatment system based on pressure regulation and control, which comprises a partition pressure regulation and control module, a micro-disturbance excitation injection module, an interface rheological state analysis module and a dynamic hysteresis inversion control module. The dynamic viscoelastic modulus is calculated in real time, an inverse dynamic model is constructed according to the dynamic viscoelastic modulus to generate an advanced compensation component aiming at the viscoelastic hysteresis effect, the transient ballistic overshoot phenomenon is effectively restrained through the strain rate hardening and hysteresis characteristics of the active hedging polishing pad under high-speed pressure switching, and therefore the transient ballistic overshoot phenomenon is effectively restrained. The problems of over-polishing and defects caused by pressure response dislocation are solved, and the wafer planarization quality under the advanced manufacturing process is improved.

The present invention provides a biodegradable polyester resin composition, a method for preparing the same, and a biodegradable polyester film prepared from the same, the composition comprising a resin including a residue of a dicarboxylic acid component and a residue of a diol component, and satisfying formula 1. By satisfying Formula 1, the productivity and processability of the biodegradable polyester resin composition are improved, thereby enhancing the tensile strength, elongation, and tear strength of the biodegradable polyester film. [Formula 1]: In Formula 1, G'is the storage modulus at a temperature of 190 DEG C and a frequency of 10 radian / sec to 100 radian / sec in dynamic viscoelasticity measurement, and G ''is the loss modulus at a temperature of 190 DEG C and a frequency of 10 radian / sec to 100 radian / sec in dynamic viscoelasticity measurement.