104 results about "Glass transition point" patented technology

The purpose of the present invention is to provide a bismaleimide compound which is capable of achieving a high glass transition point (Tg), and with which it is possible to provide a resin composition that satisfies: (1) the dielectric loss tangent is low; (2) the compatibility with organic solvent and resin material, especially with a resin material having a polar functional group is good; and (3) photolithography using an organic solvent or an alkaline aqueous solution is possible. Disclosed is a bismaleimide compound which includes a structural unit represented by general formula (1). In general formula (1), A represents a tetravalent organic group including a cyclic structure. B1 represents a divalent hydrocarbon group having 13 to 200 carbon atoms and no cyclic structure. In cases where a plurality of structural units of general formula (1) are present in the bismaleimide compound, a plurality of A's may be independent and may be the same as or different from each other, and a plurality of B1s may be independent and may be the same as or different from each other.

To reduce perspective distortion of a glass molded article obtained by subjecting a glass plate to a bending processing.SOLUTION: The present invention relates to a method for producing a glass molded article, the method including: attaching a flattened mold cloth, which is obtained by reducing irregularities on a surface of a mold cloth, to a forming mold; heating a glass plate to a temperature equal to or higher than a glass transition point; and press-forming the softened glass plate into a predetermined shape along the forming mold via the flattened mold cloth.SELECTED DRAWING: None

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.

Provided is a primer composition that contains: (A) a copolymer (A-1) which contains a constituent unit represented by the formula shown below and which does not contain a prescribed ultraviolet radiation-absorbing group (R1 denotes a hydrogen atom or the like, R2 denotes a monovalent hydrocarbon group or the like, R4 denotes a hydrogen atom or the like, R5 and R6 each denote an alkyl group or the like, X2 denotes an alkyleneoxycarbonyl group or the like, n denotes an integer between 1 and 3, and * denotes a bond to an adjacent constituent unit); a vinyl-based (co)polymer (A-2) which does not contain an alkoxysilyl, does not contain a prescribed ultraviolet radiation-absorbing group, and has a glass transition point of 80°C or higher; an ultraviolet radiation absorber (B); a compound (C) having a cyclic hindered amine structure; inorganic particles (D) having a median diameter of 100 nm or less; and a solvent (E). The (A-1) : (A-2) mass ratio is 3:1 to 1:3.

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.

A photocurable composition including an acrylic resin, an epoxy group-containing compound excluding a component corresponding to the acrylic resin, and a cationic polymerization initiator. The acrylic resin has a glass transition point of 0° C. or lower and has a constitutional unit derived from an epoxy group-containing acrylic monomer. A content proportion of the constitutional unit in a total amount of all constitutional units constituting the acrylic resin is greater than 0% by mass and less than 50% by mass.

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

An endoscope optical connector includes: a sleeve which houses an end portion of an optical fiber inside the sleeve; an inward flange provided on an inner circumference of the sleeve; a glass member arranged inside the sleeve so as to face an end surface of the optical fiber; a cap member which is attached to the sleeve and which fixes the glass member between the cap member and the inward flange; a first O-ring interposed between the cap member and the glass member; a second O-ring interposed between the glass member and the inward flange and having a glass transition point lower than a glass transition point of the first O-ring; and an inert gas filling the inside of the sleeve.

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 multilayer film from which, for a deep drawing gas pack package configured by heat sealing a lid material and a bottom material, the bottom material can be manufactured, in which the bottom material can be prevented from being broken when the deep drawing gas pack package is distributed in a frozen state, and to provide a package configured using the same.SOLUTION: Provided is a multilayer film, the multilayer film being configured by laminating an outer layer, a substrate layer, and a sealant layer in this order in their thickness direction, the outer layer containing resin having a glass transition point of less than or equal to -5°C, the substrate layer containing polyester resin.SELECTED DRAWING: Figure 1

An object is to provide a lubricant-coated galvanized steel sheet that, when subjected to complicated and difficult press forming, exhibits low sliding resistance when there is a risk of cracking during press forming and exhibits excellent press formability when a high contact pressure is applied and thus die galling is expected to occur. On a surface of a galvanized steel sheet, a film is formed that includes an acrylic resin having a glass transition point (Tg) of 100°C or above 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 above and 145°C or below and an average particle size of 3.0 µm or less, the coating weight of the film per side being in the range of 0.2 g / m2 or more and 2.5 g / m2 or less.

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.

The present invention provides a glass substrate and a preparation method thereof, and an electronic device. The glass substrate includes: a bottom layer, a top layer, a glass plate laminate, and a glass bonding laminate. The glass plate laminate includes m glass plate single layers, and the glass bonding laminate includes m+1 glass bonding single layers. The melting points of the glass bonding single layers are lower than the melting points of the glass plate single layers. The glass bonding single layer includes glass powder and an organic adhesive with a content of 70%-85%. The glass powder is made using special process steps. In the present application, the glass bonding single layer has a low melting point, a low glass transition point, and high uniformity, and the raw materials are inexpensive, rich in sources, low in synthesis temperature, and simple in process, which is conducive to industrial production. The glass bonding single layer has a lower thermal expansion coefficient, higher strength, better chemical stability and thermal stability, and has a high bonding force with high borosilicate glass and microcrystalline glass, and the glass bonding single layer has good insulation and higher safety.

The present invention provides a resin composition that has a particularly high degree of balance between low specific gravity, high rigidity, and low linear expansion coefficient; a resin composition that has a low specific gravity, high rigidity, low thermal expansion coefficient, and low water absorption; or a resin composition that has a low specific gravity and has a high degree of balance between the opposite characteristics of high toughness and low thermal expansion. In one embodiment, a resin composition comprising a first polymer forming a continuous phase, a second polymer forming a dispersed phase, and cellulose is provided, wherein the first polymer is a polyamide, and the second polymer is at least one polymer selected from the group consisting of a crystalline resin having a melting point of 60°C or higher and an amorphous resin having a glass transition point of 60°C or higher.

To provide a green sheet excellent in moldability, strength, and aging stability.SOLUTION: A green sheets disclosed herein includes a nitride-based ceramic powder, a water-soluble resin binder, and a water-soluble plasticizer, and the water-soluble resin binder has a glass transition point of 50°C or lower, and the water-soluble plasticizer has a number average molecular weight of 300 or more and 1,500 or less. Also, such a green sheet is preferably manufactured by a dry powder rolling method.SELECTED DRAWING: None

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