71 results about "Glass transition point" patented technology

A formed article obtained by performing laser welding on a transmitting resin member and an absorbing resin member, includes: a bonded part where the transmitting resin member and the absorbing resin member are bonded to each other by the laser welding, in which a molten pool is observed at the bonded part in a cross section that includes a normal to the transmitting resin member or the absorbing resin member and is orthogonal to a scanning direction of a laser beam, an area of the molten pool is 0.210 mm2 or more and 1.00 mm2 or less, the transmitting resin member and the absorbing resin member are each molded from a resin composition, the resin composition contains a thermoplastic resin, the thermoplastic resin contains at least a polyamide-based resin (A1), and a glass transition point temperature of the resin composition is 85° C. or higher.

An image forming method uses a photoreceptor including at least an aluminum substrate, a toner for developing an electrostatic image including toner particles containing at least a binding resin, and a developer bearing member including a member that generates a magnetic flux inside, wherein the aluminum substrate contains silicon, a silicon content of the aluminum substrate is more than 0.6% by mass, and a glass transition point (Tg) of the toner for developing an electrostatic image is in a range of 0 to 45° C.

Provided is a bonding material for heat dissipation substrates that enables the manufacture of high-performance heat dissipation substrates through low-temperature, short-time heat treatment. In the heat dissipation substrate 1, the bonding material for the heat dissipation substrate is a thermoplastic resin having a glass transition point of 200°C or more and 300°C or less, and D 50 and a thermally conductive material including at least first particles having a particle diameter of 2 μm or more and 5 μm or less and an average aspect ratio of 1.2 or more. In this bonding material, when the total mass of the thermally conductive material is taken as 100 wt%, the content of the first particles is 70 wt% or more and 100 wt% or less. With this bonding material, a bonding layer 40 with excellent bonding strength, heat resistance, and thermal conductivity can be formed at the interface between the circuit member 20 and the ceramic member 10 and at the interface between the heat dissipation member 30 and the ceramic member 10 by low-temperature, short-time heat treatment.

A display device that includes a display panel that has a plurality of organic EL elements, and a drive unit that is provided to be in contact with the display panel and drives the display panel, in which each organic EL element includes an organic layer that contains a high glass transition temperature material having a glass transition point of 120° C. or higher, is provided.

This invention relates to a glass cover with an outer frame, wherein a flat glass plate is directly joined to the outer frame, wherein the glass matrix within the outer frame comprises at least one of bismuth oxide and boron oxide, and the glass ceramic has a coefficient of thermal expansion of 15 × 10⁻⁶. －7 In the glass ceramics described above, the total volume fraction of the negative thermal expansion filler and the total volume fraction of the filler components are both 40% to 65%, and the softening point of the glass components in the glass matrix is ​​lower than the glass transition point of the flat glass.

A dust core according to the present invention is characterized by comprising a granulated powder in which 2.0 to 4.0 mass% of a binder containing an acrylic resin as a main component is added to a magnetic alloy powder. The pH (hydrogen ion index) of the binder is preferably 6.0 to 8.0. The glass transition point of the binder is preferably from -5°C to lower than 25°C. The magnetic alloy powder is preferably any one of sendust powder, an amorphous alloy powder, or a nanocrystalline alloy powder.

A composite material comprises a dispersion material having a thermal conductivity of 100 W / K ⋅ m or above, and an insulator interposed between the dispersion materials. For example, the dispersion material is an aluminum-based metal powder. For example, the insulator is an oxide or a resin having a glass transition point equal to or lower than the melting point of the dispersion material. For example, the electrical conductivity of the composite material is 0.5 × 106 S / m or below.

To suppress cracks in metal bumps. [Solution] The semiconductor device of the embodiment comprises a mounting substrate, a package substrate provided on the side of the mounting substrate facing the main surface on the side intersecting the main surface of the mounting substrate, a metal bump provided between the main surface of the mounting substrate and the package substrate, a first underfill provided on the side of the metal bump in a second direction along the main surface, and a second underfill provided between the metal bump and the first underfill, wherein the first underfill and the second underfill have different glass transition points.

The present invention provides a polytetrafluoroethylene sealing material and a preparation method thereof, and belongs to the technical field of sealing materials, the polytetrafluoroethylene sealing material comprises the following components by weight: 100 parts of polytetrafluoroethylene and 10-40 parts of a filler, and the filler comprises boron nitride and a polyvinylidene fluoride coating layer coating the surface of boron nitride. The boron nitride filler with the surface coated with polyvinylidene fluoride is introduced into a polytetrafluoroethylene matrix, so that the comprehensive performance of the sealing material is remarkably improved. The wear resistance is greatly enhanced by boron nitride through a pinning effect, and a constructed high-thermal-conductivity network can effectively export friction heat, so that the interface temperature is lower than the glass transition point of polytetrafluoroethylene to maintain rigidity; meanwhile, the polyvinylidene fluoride coating layer realizes covalent crosslinking through dehydrofluorination reaction with polytetrafluoroethylene, so that the mechanical strength and the interface bonding force of the material are remarkably improved.

To provide a protective sheet having a protective layer which has low tackiness at room temperature and can relatively strongly adhere to a surface to be protected.SOLUTION: The protective sheet includes a protective layer for protecting a protection target surface of a substrate when an electronic component device is manufactured, and the protective layer contains a polymer having a glass transition point of 10 °C or more and 50 °C or less.SELECTED DRAWING: Figure 1

To provide a composite material having high thermal conductivity and low electrical conductivity. [Solution] The composite material comprises dispersed materials with a thermal conductivity of 100 W / K·m or more and an insulator interposed between the dispersed materials. For example, the dispersed materials are aluminum-based metal powders. For example, the insulator is an oxide or resin whose glass transition point is equal to or lower than the melting point of the dispersed materials. For example, the electrical conductivity of the composite material is 0.5×10 6 S / m or less.

The present invention provides a magnetic one-component toner that has low-temperature fixing properties and excellent heat resistance and heat stress resistance over long periods, as well as an image forming apparatus using the same. [Solution] The magnetic one-component toner comprises toner matrix particles containing at least a binder resin and magnetic powder, and an external additive attached to the surface of the toner matrix particles. The binder resin comprises an amorphous polyester resin and a crystalline polyester resin containing an aliphatic diol with 3 to 9 carbon atoms, and the amount of crystalline polyester resin added is 5% by mass or less relative to the amorphous polyester resin. When the glass transition point at the first heating, measured by differential scanning calorimeter, is Tg1, and the glass transition point measured when the temperature is raised again after cooling after measuring Tg1 is Tg2, Tg(45) and Tg(25), which are Tg1 measured after being left at 45°C and 25°C for 100 hours, are 0

A lubricating film-coated steel sheet has at least one surface on which an organic resin film is formed. The organic resin film contains an acrylic resin having a glass transition point (Tg) of 100° C. or higher and an acid value ratio R=acid value (mg-KOH / g) / Tg (° C.) of 1.50 or more, and 5 mass % or more of a polyolefin wax having a melting point of 100° C. or higher and 145° C. or lower and an average particle diameter of 3.0 μm or less, and is formed on a surface of a steel sheet at a coating weight, W, of 0.3 g / m2 or more and 2.5 g / m2 or less per surface.

Provided is an interlayer film for laminated glass capable of suppressing generation of double images, and suppressing unevenness in heat shielding performance in laminated glass. The interlayer film for laminated glass according to the present invention has a region where a partial wedge angle in a length of 400 mm in the direction connecting one end and the other end of the interlayer film is 0.05 mrad or more, the interlayer film includes a heat shielding layer containing a heat shielding substance and having a glass transition point of 15° C. or more, and when a distance between the one end and the other end or the interlayer film is referred to as X, the thickness of the interlayer film at an arbitrary position (1) of the interlayer film within a region of 0.1X to 0.9X from the one end toward the other end, the thickness of the interlayer film at a position (2) where the thickness of the interlayer film is smaller than the thickness of the interlayer film at the position (1) by 25 μm or more, the solar transmittance at the position (1) of the laminated glass including the interlayer film, and the solar transmittance at the position (2) of the laminated glass including the interlayer film satisfy specific relationships.

To provide a rubber composition for a tire particularly useful for a tire for heavy load, which is capable of obtaining a crosslinked rubber composition for a tire having excellent wet grip performance, low rolling resistance and wear resistance.SOLUTION: There is provided a rubber composition for a tire which comprises at least one rubber component selected from the group consisting of a conjugated diene-based rubber and its hydrogenated product, silica and at least one polymer component selected from the group consisting of a polymer (A) having a side chain (a) containing a hydrogen-bonding cross-linking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and a glass transition point of 25°C or less and a polymer (B) containing a hydrogen-bonding cross-linking site and a covalent bonding cross-linking site on the side chain and having a glass transition point of 25°C or less, wherein the rubber component contains 50 mass% more of an isoprene-based rubber, the average glass transition temperature of the rubber component is -90°C or more and -50°C or less, the content of the polymer component is 1 to 100 pts.mass based on 100 pts.mass of the rubber component and the type A rubber hardness after curing the rubber composition for a tire at 0°C as specified in ISO is 55 to 70.SELECTED DRAWING: None

This invention relates to a method for modeling the curing kinetics of polymer resins, specifically providing a method for fitting the curing kinetics of polymer resins based on a segmented model. The method employs a three-stage segmented kinetic model. In the first stage, an external catalytic model is introduced to quantify the inductive acceleration effect of the co-catalyst in the early stages of the reaction. In the second stage, the Kamal-Sourour model is used to ensure the fitting accuracy of the chemical control region. In the third stage, a diffusion correction term based on thermodynamic evolution is introduced to quantify the diffusion resistance caused by entering the glassy state in the later stages, significantly improving the fitting accuracy at the end of curing. More importantly, this invention creatively proposes a method based on the activation energy minimum point. α tr and dynamic glass transition point α vit The segmentation points effectively couple the external catalytic model, the Kamal-Sourour model, and the dynamic diffusion model, effectively solving the problem of inaccurate fitting of the full-cycle kinetics, improving the fitting accuracy, and providing data support for the fine-tuning of the curing process.

To provide a polyimide precursor that satisfies a low coefficient of thermal expansion (low CTE) and high toughness and adhesiveness, which traditionally had a trade-off relationship, and in which a change in coefficient of thermal expansion above and below the glass transition point is suppressed despite having a glass transition point (Tg) at a relatively low temperature.　The polyimide precursor is characterized by being obtained by polymerizing a second tetracarboxylic acid dianhydride having a rigid skeleton and a second diamine having a rigid skeleton in the presence of a soluble polyimide of a terminal amine or a terminal acid anhydride obtained by polymerizing a first tetracarboxylic acid dianhydride having a flexible skeleton and a first diamine having a flexible skeleton.

A polymerisable radiation-curable composition comprising:(i) monomers, comprising at least (a) a first monomer having a TG (glass-transition point) of the homopolymer of said first monomer ≥120° C. and at least (b) a second monomer having a TG (glass-transition point) of the homopolymer of the second monomer ≤100° C., wherein at least one of the at least one first monomer or of the at least one second monomer has an alicyclic group, andcomprising (ii) at least one further component, comprising at least one photo-initiator for the UV and / or Vis spectral region or a photo-initiator system for the UV and / or Vis spectral region. Also disclosed is a blank in the form of a three-dimensional moulded body of a polymerised composition, in particular a radiation-cured composition, for producing 3D moulded bodies, dental prosthetic parts, orthopaedic appliances or dental pre-forms in a rapid prototyping, rapid manufacturing, or rapid tooling method.

In an ignition unit for a propellant charge (8), comprising an elongated ignition transfer charge (2) made of propellant powder, through which a free ignition channel (5) runs in its longitudinal direction, and a combustible support tube (3) that surrounds the ignition transfer charge (2) perpendicular to the free ignition channel (5), the ignition transfer charge (2) is formed from a first material which has a glass transition point below -40°C in an observed temperature range of -51°C to +71°C, and the support tube (3) is formed from a second material which does not have a glass transition point below +72°C.

To provide a rubber composition for a tire particularly useful for a high-performance tire, a year-round tire and a low fuel consumption tire, which is capable of obtaining a crosslinked rubber composition for a tire having excellent wet grip performance, low rolling resistance and wear resistance.SOLUTION: There is provided a rubber composition for a tire which comprises at least one rubber component selected from the group consisting of a conjugated diene-based rubber and its hydrogenated product, silica and at least one polymer component selected from the group consisting of a polymer (A) having a side chain (a) containing a hydrogen-bonding cross-linking site having a carbonyl-containing group and / or a nitrogen-containing heterocycle and a glass transition point of 25°C or less and a polymer (B) containing a hydrogen-bonding cross-linking site and a covalent bonding cross-linking site on the side chain and having a glass transition point of 25°C or less, wherein the average glass transition temperature of the rubber component is -50°C or more and -20°C or less and the content of the polymer component is 1 to 100 pts.mass based on 100 pts.mass of the rubber component.SELECTED DRAWING: None

A rubber composition for a tire tread is disclosed, which provides a tire excellent in wet grip performance at low temperatures and wet grip performance at high temperatures. The rubber composition for a tire tread includes, per 100 parts by mass of diene-based rubbers including (a) 25 to 65 parts by mass of a modified styrene butadiene rubber having a glass transition point of −30° C. or more and (b) 25 to 65 parts by mass of a modified styrene butadiene rubber having a glass transition point of −50° C. or less: 80 to 140 parts by mass of silica; 15 to 50 parts by mass of a thermoplastic resin having a softening point of 40° C. or more; and 5 to 15 parts by mass of an oil.

Provided is a protective sheet comprising a protective layer for protecting a surface to be protected of a substrate when manufacturing an electronic component device. The protective layer includes a polymer having a glass transition point of 10°C or more and 50°C or less.

To provide a resin composition for an optical connection component capable of achieving both suppression of loss fluctuation due to temperature rise and excellent PC connection.SOLUTION: The resin composition for an optical connecting part of the present invention contains a base resin and an inorganic filler, wherein the base resin has a glass transition point of 85 °C or more, the mass of a residue obtained by heating the resin composition for an optical connecting part at 700 °C is 68.0% or more and 74.4% or less based on the mass of the resin composition for an optical connecting part, and the resin composition for an optical connecting part has a Rockwell hardness of 97.1 or more and 106.8 or less.SELECTED DRAWING: Figure 1

A rubber composition comprising, per 100 parts by mass of a rubber component containing styrene-butadiene rubber whose glass transition point is −70° C. to −20° C. and butadiene rubber, 0.1 to 10 parts by mass of a compound represented by the following general formula (1):wherein at least one of R1 to R5 is an —OH group or an —OCH3 group and others are each an —H group or a hydrocarbon group having 1 to 20 carbon atoms, A is an unsaturated bond or an alkylene group having 1 to 20 carbon atoms and optionally having an —H group, a —CH3 group, an —NH2 group, an —O— group, or an —OH group, n is an integer of 0 to 10, and B is a —COOH group, an —OH group, or an ═O group and optionally forms a ring structure with adjacent R1 or R5.

Multi-layer gas barrier film for containing medical fluids, comprising an inner film having a first and a second surface, the first surface being in contact with the fluid and the second surface being in contact with a first adhesion agent, a middle film having a third and a fourth surface, the third surface being in contact with the first adhesion agent and the fourth surface being in contact with a second adhesion agent, an outer film having a fifth and sixth surface, the fifth surface being in contact with the second adhesion agent, where the inner film comprises an olefinic polymer having a glass transition point of less than 10° C. and a melting point of above 130° C., where the middle film has a polymer having an ester bond and a glass transition point of above 35° C. and a melting point above 150° C., and the middle film comprises an inorganic gas barrier material, and where the outer film comprises a polymer having an amide bond.

A bending meshing type gear device includes a wave generator, a bending gear that is bent and deformed by the wave generator, and a meshing gear that meshes with the bending gear, in which the meshing gear is formed of a first resin having a glass transition point lower than about 140° C., the bending gear is formed of a first high thermal conductivity material having higher thermal conductivity than the first resin, and the wave generator is formed of a second high thermal conductivity material having higher thermal conductivity than the first high thermal conductivity material.

To provide a method for manufacturing a printed matter which can manufacture a printed matter having improved image density and scratch resistance.SOLUTION: A method for manufacturing a printed matter includes the steps of: applying oily inkjet ink onto a base material by an inkjet method; and applying aqueous clear ink onto the base material applied with the oily inkjet ink. The oily inkjet ink contains a pigment, a pigment dispersant, and a non-water soluble organic solvent, and the aqueous clear ink contains a water-dispersible resin, a surface-active agent, and water. When a film obtained by drying the aqueous clear ink is immersed in the oily inkjet ink, and is left at 70°C for one week, a change rate of the mass of the film after having been taken out from the oily inkjet ink to the mass of the film before being immersed in the oily inkjet ink exceeds 0%, the glass transition point of the water-dispersible resin of the aqueous clear ink is 5°C or more and less than 50°C, and a content of the surface-active agent to the total amount of the aqueous clear ink with respect to the content of the pigment to the total amount of the oily inkjet ink of 1 is 0.5 or more.SELECTED DRAWING: None

An acrylic rubber composition comprising 5 to 15 parts by weight of a plasticizer having a solubility parameter SP value (by Small's method) of 8.5 to 10.5 based on 100 parts by weight of super cold resistant grade acrylic rubber having a glass transition point Tg of −42° C. or less, wherein the acrylic rubber composition can give a vulcanizate with the TR10 value, which is an index of cold resistance, of −42° C. or less both initially and after oil dipping. In the acrylic rubber composition, first, the ratio of an acrylate monomer that constitutes acrylic rubber is adjusted, thereby the low temperature characteristics can be maintained even in an oil contact environment. This intentionally reduces the oil resistance of the vulcanized rubber molded product, thereby increasing the amount of oil swelling into the vulcanized rubber molded product and improving the flexibility in a low temperature environment.

This invention provides a method for determining the nucleation time of a glass-ceramic, comprising: testing the differential thermal analysis (DSC) curve of a precursor glass to obtain the glass transition point Tg and the crystallization peak position Pc; selecting a nucleation temperature Tn and a crystallization temperature Tc, wherein Tn ranges from Tg to Tg+150℃ and Tc ranges from Pc-60℃ to Pc+60℃; performing DSC tests on the precursor glass at different times under heat treatment at Tc, and setting the time corresponding to the complete disappearance of the crystallization peak on the DSC curve as the crystallization time tc; preparing the glass-ceramic, wherein the precursor glass is first heated to Tn and held at that temperature, and then heated to Tc and held at that temperature for tc; testing the DSC curve of the glass-ceramic obtained in step 4, and calculating the integral area of ​​the corresponding endothermic peak on the DSC curve; gradually extending the nucleation time, repeating steps 4-5, and when the change in the integral area of ​​the endothermic peak on the DSC curve is less than a preset value, the corresponding nucleation time is the optimal nucleation time tn. This invention can quickly and accurately determine the shortest time required to reach the nucleation limit.

To provide a powder magnetic core that uses a magnetic alloy powder and has excellent radial crushing strength and moldability, and a method for manufacturing the same.SOLUTION: A powder magnetic core according to the present invention is made of granulated powder obtained by adding 2.0 mass% or more and 4 mass% or less of a binder whose main component is acrylic resin to a magnetic alloy powder. The pH (hydrogen ion exponent) of the binder is preferably 6 or more and 8 or less. The glass transition point of the binder is preferably -5°C or more and less than 25°C. The magnetic alloy powder is preferably any one of sendust powder, amorphous alloy powder, and nanocrystalline alloy powder.SELECTED DRAWING: Figure 1