148 results about "Dynamic viscoelasticity" patented technology

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.

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.

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

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.

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.

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 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

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.

An electrostatic charge image developer contains a toner including toner particles that contain a binder resin and a carrier including magnetic particles and a resin layer that adheres to a surface of the magnetic particles, in which, in a dynamic viscoelasticity measurement of the toner, in a case where a loss tangent tanδ at a temperature of 90° C. and a strain of 1% is represented by D1 (90), a loss tangent tanδ at a temperature of 90° C. and a strain of 50% is represented by D50 (90), a loss tangent tanδ at a temperature of 150° C. and a strain of 1% is represented by D1 (150), and a loss tangent tanδ at a temperature of 150° C. and a strain of 50% is represented by D50 (150), each of D1 (90), D50 (90), D1 (150), and D50 (150) is 0.5 or more and 2.5 or less, a value of D50 (150)−D1 (150) is less than 1.5, and a value of D50 (90)−D1 (90) is less than 1.0, and in the surface of the magnetic particles, an average unevenness interval Sm and an arithmetic mean roughness Ra satisfy 0.5 μm≤ Sm≤2.5 μm and 0.3 μm≤ Ra≤1.2 μm.

To provide a narrow and large-diameter tire capable of improving noise performance at high speeds without compromising handling performance at low temperatures.The tire has a tread portion formed of an elastomer composition. A relationship between a tire outer diameter (Dt) and a tire cross-sectional width (Wt) satisfy a following expression (1). The tread portion includes at least one circumferential groove extending in a tire circumferential direction. A rubber thickness at a groove bottom of the circumferential groove is 0.05 to 0.25 times a maximum thickness of the tread portion. The elastomer composition has a phase difference δ of 5.0×10−2π [rad] or less between a maximum value of strain and a maximum value of stress when repeatedly deformed at a temperature of 30 degrees Celsius and a frequency of 10 Hz in a dynamic viscoelasticity test;1963.4≤(Dt2×π / 4) / Wt≤2827.4  (1).

This adhesive composition is for forming an adhesive layer provided between a support substrate and a semiconductor substrate having bumps, the adhesive composition containing an adhesive component (A) that is cured by a hydrosilylation reaction, the Young's modulus of the adhesive layer as measured by dynamic viscoelasticity measurement being 5 MPa or more.

Provided is an adhesive composition that can be used for multi-stage curing, that can obtain excellent adhesive properties in a low cross-linked state after one-time curing, that can be efficiently subjected to multi-stage curing even when the amount of active energy rays during curing is small, and that can be used for multi-stage curing. Alternatively, during curing, multi-stage curing can be efficiently performed using active energy rays in the visible light region, and after final curing, high elasticity of the adhesive layer can be achieved, and excellent adhesive properties, reliability, and shape stability can be obtained. A pressure-sensitive adhesive composition containing: an acrylic resin (A) having a glass transition temperature, calculated from dynamic viscoelasticity, of 12 DEG C to 40 DEG C; and a structural unit derived from an alkyl (meth) acrylate (a1) having an alkyl group having 5 or more carbon atoms, and a structural unit derived from an ethylenically unsaturated monomer (a3) containing an amide group.

To provide a golf ball improved in durability without substantially lowering resilience.SOLUTION: A golf ball has a core, and a cover of at least one layer positioned outside the core. The cover of the at least one layer is formed of a cover composition containing one or more kinds of an ionomer resin obtained by neutralizing with at least one kind of metal ion selected from Groups I, II, and XII of the periodic table, at least a part of a carboxyl group and / or a dicarboxylic anhydride group in a copolymer (P) containing as the essential constitutional units, a structural unit (A) derived from ethylene and / or 3-20C α-olefin, and a structural unit (B) derived from a monomer having a carboxyl group and / or a dicarboxylic anhydride group. A loss elastic modulus E''at 0°C obtained by measuring the dynamic viscoelasticity of the cover composition in a specific condition is 3.40×107 Pa or less.SELECTED DRAWING: None

The purpose of the present invention is to provide an adhesive tape capable of achieving both excellent bending resistance and excellent impact absorption. Another purpose of the present invention is to provide an electronic device including the adhesive tape. The present invention is an adhesive tape having a foam layer. The foam layer has a shear storage modulus of 0.3 MPa or more at 23°C as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz, and the foam layer has a loss tangent of 0.50 or more at 23°C as measured by dynamic viscoelasticity measurement at a measurement frequency of 100 Hz.

Provided are a copper ink that suppresses bleeding when printing copper ink on a substrate and makes it possible to manufacture a highly reliable circuit pattern with few short circuits, and an electronic circuit board using the same and a method for producing an electronic circuit board. The present invention is a copper ink containing copper particles, wherein the thixotropy index TI, defined by the ratio (η1 / η10) of the viscosity η10 at a shear rate of 10 sec-1 to the viscosity η1 at a shear rate of 1 sec-1, is 7.5 or less and the hysteresis area of shear stress by dynamic viscoelasticity measurement, when the shear rate is raised from 0.01 sec-1 to 300 sec-1 over 50 seconds, held at 300 sec-1 for 50 seconds, and lowered from 300 sec-1 to 0.01 sec-1 over 50 seconds, is 3000 Pa∙sec-1 or more.

To provide a film containing an aliphatic polyester which is excellent in biodegradability, processability, quietness and barrier properties and can be suitably used for packaging applications and agricultural, forestry and fishery applications.SOLUTION: The aliphatic polyester film contains at least a polyhydroxyalkanoic acid and has a loss tangent (tan δ (30)) of ≥ 0.05 and ≤ 0.15 at 30 °C in dynamic viscoelasticity measurement and a maximum peak temperature of the loss tangent of ≥ 30 °C and ≤ 100 °C.SELECTED DRAWING: Figure 1

An adhesive sheet which is formed from an adhesive composition containing a (meth) acrylic copolymer (A) that has a structural unit derived from a monomer M that generates an active species excited by irradiation with an active energy ray, and which satisfies the following requirements (1) and (2). Condition (1): the storage shear modulus (G '(-20 DEG C)) at-20 DEG C as determined by dynamic viscoelasticity measurement in a shear mode at a frequency of 1 Hz is 10 kPa or more and 1000 kPa or less, and Condition (2): the maximum strain value (gamma max) when a stress of 2 kPa is applied at 60 DEG C for 600 seconds is less than 80%.

An electrostatic charge image developer contains a carrier and a toner, in which the carrier has magnetic particles, a resin coating layer that coats the magnetic particles, and inorganic particles contained in the resin coating layer, and in a case where an element ratio of metals and metalloids, that constitute the inorganic particles, is analyzed by X-ray photoelectron spectroscopy in a depth direction, and the element ratio at 0 seconds of etching is defined as A and the element ratio at 300 seconds of etching is defined as B, a value of B−A is 0.5 atm % or more and 3.0 atm % or less; and the toner contains toner particles, and in a dynamic viscoelasticity measurement of the toner particles in a case where a temperature is raised from 30° C. to 120° C., a minimal value tan δ(min) of a loss tangent is present at 50° C. or higher and 80° C. or lower and is 0.50 or more and 1.00 or less.

A shoe member consisting of a material comprising a thermoplastic elastomer, wherein the material has a glass transition temperature Tg of no more than 10° C., a loss tangent tan δ of no less than 0.4 in a test of dynamic viscoelasticity, and a Δ tan δ, which is the amount of change of tan δ, of no less than 0.15 when strain is changed from 5% to 100%.

An electrostatic charge image developing toner contains toner particles that contain a binder resin, in which each of a loss modulus G″5 (150) of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 150° C. and a strain of 5% and a loss modulus G″50 (180) of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 180° C. and a strain of 50% is 1×103 Pa or more and 1×104 Pa or less, and a relationship between a loss modulus G″5 (t1) of the electrostatic charge image developing toner at a first temperature t1 in a temperature range of 150° C. or higher and 180° C. or lower and a strain of 5% and a loss modulus G″50 (t2) of the electrostatic charge image developing toner at a second temperature t2 higher than the first temperature t1 in the temperature range of 150° C. or higher and 180° C. or lower and a strain of 50% satisfies the following Formula (1) in a case of a temperature difference (t2−t1) between the first temperature t1 and the second temperature t2 is 15° C. or higher.1<G″5(t1) / G″50(t2)<3.0  Formula (1)

The purpose of the present invention is to provide an adhesive tape excellent in high temperature holding properties and curved surface followability. The present invention is an adhesive tape having an adhesive layer formed using an adhesive composition, wherein the adhesive composition contains a (meth)acrylic copolymer, the (meth)acrylic copolymer has a constituent unit derived from an alkyl (meth)acrylate, the adhesive layer has a shear storage elastic modulus of 15000 Pa or more at 80°C as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C, the peak temperature of a loss tangent of the adhesive layer as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C falls within the range of -20°C to 0°C, and the adhesive layer has a gel fraction of 10%-45% by mass.

An object of the present invention is to find a useful means for removing an intraocular membrane. The present invention relates to an agent for use in intraocular membrane peeling surgery, which contains a solution containing a hydrogel-forming material and satisfies the following formula 1 with respect to the dynamic viscoelasticity measured at a temperature of 25 to 40° C. and a frequency of 1 Hz.0<Vmax≤3  (Formula 1)Provided that in the formula 1, Vmax (Pa / sec) is the maximum change rate of the storage elastic modulus after the initiation of gelation.

An electrostatic charge image developing toner contains toner particles that contain a binder resin, in which in a case where G′1 (90) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 1%, G′50 (90) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 90° C. and a strain of 50%, and G′50 (180) represents a storage modulus G′ of the electrostatic charge image developing toner determined by measuring dynamic viscoelasticity of the electrostatic charge image developing toner at a temperature of 180° C. and a strain of 50%, the electrostatic charge image developing toner satisfies the following Formulas (1) to (4).G′1(90)<1×105  Formula (1)1×103<G′50(180)  Formula (2)1<G′50(90) / G′50(180)<30  Formula (3)1<G′1(90) / G′50(90)<10  Formula (4)

The present invention addresses the problem of providing a rubber composition having low haze and a method for producing the rubber composition. This rubber composition contains a crosslinked product of a fluorine-containing copolymer, and the temperature (T) at which the minimum storage modulus (E ') is exhibited is 55 DEG C or more in a dynamic viscoelasticity measurement at a measurement temperature of 23-200 DEG C and a measurement frequency of 1 Hz.

Provided is a binder composition for a power storage device, which has excellent adhesion, is capable of producing a power storage device electrode in which expansion of the electrode accompanying repeated charging and discharging is suppressed, and is capable of improving the cycle life characteristics of the power storage device. This binder composition for an electricity storage device contains a polymer (A) and a liquid medium (B), and when the total of the repeating units contained in the polymer (A) is taken as 100 parts by mass, the content of the repeating units contained in the polymer (A) is less than or equal to 100 parts by mass. The polymer (A) contains 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 an unsaturated carboxylic acid, and the peak top of the dynamic viscoelasticity tan [delta] (loss elastic modulus / storage elastic modulus) is 1 in the range of-50 DEG C to 10 DEG C; the present invention is characterized in that there is one in the range of 150 DEG C to 250 DEG C, and when the tan [delta] at the peak top in the range of-50 DEG C to 10 DEG C is represented by tan [delta] (Tp1) and the tan [delta] at the peak top in the range of 150 DEG C to 250 DEG C is represented by tan [delta] (Tp2), the relationship represented by formula (1) is satisfied. (1) tan [delta] (Tp2) / tan [delta] (Tp1) < 0.5.