164 results about "Glass transition point" patented technology

The present invention pertains to a long-fine aramid single fiber having a maximum fiber diameter of less than 2,000 nm and a minimum fiber length of greater than 10 μm, wherein the degree x of crystallinity determined by the expression x=(1-∆Qx / ∆Q0)×100 (%) (in the expression, ∆Qx is a heat capacity change amount before and after the glass transition point of the long-fine aramid single fiber, and ∆Q0 is a heat capacity change amount before and after the glass transition point of an amorphous aramid) is at least 60%. The present invention can provide an aramid single fiber which is very thin and long and has a high degree of crystallinity.

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

To provide an ink set which enables provision of an image excellent in scratch resistance and enables recording with good clogging recoverability.SOLUTION: An ink set includes: an aqueous inkjet ink composition containing a coloring material and resin particles; and a treatment liquid containing a coagulant. Therein the resin particles contain first resin particles made of an acrylic resin having a glass transition point of 60°C or higher and 110°C or lower, second resin particles made of a polyester-based resin having a glass transition point of 60°C or higher and 110°C or lower, and third resin particles made of a polyolefin-based resin having a melting point of 110°C or higher and 150°C or lower. In the inkjet ink composition, a content of the second resin particles is 0.4 time or less a content of the first resin particles.SELECTED DRAWING: None

To provide a resin composition for sealing a semiconductor that can be used to produce a sealing part for sealing a semiconductor element, that allows the sealing part to have a high glass transition point, and that can increase the long-term heat resistance of the sealing part. The resin composition for sealing contains: a maleimide compound (A); an epoxy compound (B) containing an epoxy compound (b1) having a structure represented by formula (1); a phenol compound (C) containing a phenol compound (c1) having a structure represented by formula (2); and an inorganic filler (D). In formula (1), n is a number of from 1 to 5 and m is a number of from 1 to 6. In formula (2), n is a number of from 1 to 5, R is CH3, OH, C6H5, or C6H4OH, and X is a structure represented by formula (21), a structure represented by formula (22), or a structure represented by formula (23).

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.

To provide an aramid monofilament which is very thin, long, and high in crystallinity.SOLUTION: A long, fine aramid monofilament has a maximum fiber diameter of less than 2000 nm, a minimum fiber length of more than 10 μm, and crystallinity x of 60% or more, the crystallinity being determined by an equation: x=(1-ΔQx / ΔQ0)×100(%) (in the equation, ΔQx is a variation of heat capacity of the long, fine aramid monofilament before and after glass transition point, and Q0 is a variation of heat capacity of amorphous aramid before and after glass transition point).SELECTED DRAWING: None

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.

The invention relates to a method for manufacturing a stator. In the stator winding, a first insulating layer and a second insulating layer comprising insulating resins having different glass transition points are formed, the first insulating layer comprising a first insulating resin having a higher glass transition point, and the second insulating layer comprising a second insulating resin having a lower glass transition point. The method for manufacturing a stator comprises: a first step of applying a first insulating resin to a stator winding and hardening the first insulating resin at a temperature higher than the glass transition point thereof to form a first insulating layer; and a second step, after the first step, of applying a second insulating resin to the stator winding and hardening the second insulating resin at a temperature higher than the glass transition point thereof to form a second insulating layer.

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.

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

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 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.

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

To provide a fluid-sealing container that retains carbon dioxide gas permeability at low temperatures while offering superior adaptability to the body and superior durability at low temperatures, wherein the fluid-sealing container encloses carbon dioxide-containing cold water and is applicable as a body cooler.SOLUTION: A fluid-sealing container comprises: a body section formed of a film composed of a thermoplastic elastomer or a thermoplastic resin; and an injection port section that is connected to the body section and that is configured to be openable and closable so as to be capable of sealing the body section. The film forming the body section: is water-impermeable; has a glass-transition temperature of less than 0°C; and has carbon dioxide gas permeability of 5 L / ( m2 24hr atm) or higher as measured under the condition of 10°C in accordance with JIS K 7126-2 Annex B; and further has a tensile strength of 8 N / 10 mm or more as measured under the condition of 10°C in accordance with JIS K 7161-1.SELECTED DRAWING: Figure 1

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 toner that is excellent in chargeability and capable of suppressing the occurrence of cleaning failure.SOLUTION: A toner includes toner particles. The toner particle includes a toner base particle and an external additive adhered to a surface of the toner base particle. A number average circularity of the toner base particle is 0.950 or more and 0.985 or less. The toner base particle contains a binder resin with a glass transition point of 20°C or more and 65°C or less, and a positively-charged charge control agent. The binder resin contains a specific styrene-(meth)acrylic resin. A content ratio of the specific styrene-(meth)acrylic resin in the toner base particle is 50.0 mass% or more and 95.0 mass% or less. An acid value of the specific styrene-(meth)acrylic resin is 2.5 mgKOH / g or more and 30.0 mgKOH / g or less.SELECTED DRAWING: Figure 1