公开(公告)号：US20240227284A1

公开(公告)日：2024-07-11

申请号：US18287932

申请日：2022-04-27

Applicant: DENKA COMPANY LIMITED

Inventor： Takumi BABA ,  Jun YOSHIDA ,  Takashi DOMOTO

IPC: B29C64/129 ,  B29C64/264 ,  B33Y10/00 ,  B33Y70/00 ,  C08F2/50 ,  C08F290/06 ,  C08K5/00

CPC classification number: B29C64/129 ,  B29C64/264 ,  B33Y10/00 ,  B33Y70/00 ,  C08F2/50 ,  C08F290/067 ,  C08K5/0025

Abstract: A photocurable resin composition, including a polymerizable organic compound component and a photopolymerization initiator, wherein a light transmittance at a wavelength of 405 nm of a cured product with an average thickness of 100 μm is 24% or less, and the cured product is cured by irradiating the photocurable resin composition with a light having a light intensity of 1.7 mW/cm2 and an irradiation amount of 7.65 mJ/cm2.

公开(公告)号：US20230193090A1

公开(公告)日：2023-06-22

申请号：US17923377

申请日：2021-05-17

Applicant: DENKA COMPANY LIMITED

Inventor： Tometomo UCHIDA ,  Toru ARAI ,  Takashi DOMOTO ,  Takako TANIGAWA ,  Jun WATANABE ,  Megumi SUDO ,  Jun YOSHIDA

IPC: C09J123/22 ,  C08K5/00 ,  C08F2/44 ,  C08F2/48 ,  H01L21/02 ,  C08K5/101 ,  C08F20/20 ,  C09J11/06

CPC classification number: C09J123/22 ,  C08K5/0025 ,  C08F2/44 ,  C08F2/48 ,  H01L21/02304 ,  H01L21/0231 ,  C08K5/101 ,  C08F20/20 ,  C09J11/06

Abstract: A composition for temporary bonding, includes: (A) a (meth)acrylate having the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose side chain is an alkyl group having 18 or more carbon atoms and homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer and/or a polyisobutene copolymer; and (C) a photo radical polymerization initiator.

公开(公告)号：US20220073753A1

公开(公告)日：2022-03-10

申请号：US17413446

申请日：2020-03-26

Applicant: DENKA COMPANY LIMITED

Inventor： Takashi DOMOTO ,  Yoshitsugu GOTO

IPC: C09D4/00 ,  C09D133/06 ,  C08F220/18 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/124

Abstract: A photocurable composition for three-dimensional modeling capable of high-speed modeling, a three-dimensional modeled object using the composition, and a method for producing the three-dimensional modeled object is provided. A photocurable composition for three-dimensional modeling, comprising a polymerizable organic compound component is provided. The photocurable composition has a steady flow viscosity of 30,000 mPa s or less measured with a rotary rheometer at 25° C. and a shear rate of 0.01 per second. When the photocurable composition for three-dimensional modeling is irradiated with a light having a light intensity of 1.3 mW/cm2, G′ becomes 1×106 Pa or more after a start of photopolymerization in an integrated light irradiation time of 4 seconds or less. After the start of photopolymerization, a maximum value of tan δ on and after a gel point is 0.5 or more. The gel point is the point where G′=G″ is satisfied for the first time after the start of photopolymerization. G′ is a storage shear modulus, G′ is loss shear modulus, and tan δ is a loss tangent, each of which is calculated based on measurement data for 30 seconds per one measurement, measured with a rotary rheometer having a pair of parallel plate with a diameter of 10 mm and a measurement gap of 0.1 mm at a strain of 0.5% or less, a frequency of 0.1 Hz, and 25° C.

公开(公告)号：US20220010116A1

公开(公告)日：2022-01-13

申请号：US17293879

申请日：2019-11-14

Applicant: DENKA COMPANY LIMITED

Inventor： Tometomo UCHIDA ,  Takashi DOMOTO ,  Takako TANIGAWA ,  Kenji NOMURA ,  Yoshitsugu GOTO

IPC: C08L23/22 ,  C08L33/02 ,  C08K5/5397 ,  C08K5/3417 ,  C09J133/02 ,  C09J7/10

Abstract: A composition for temporary bonding, including the following (A) to (C). An adhesive for temporary bonding for manufacturing an electronic device, including the composition for temporary bonding. (A) A (meth)acrylate comprising the following (A-1) and (A-2): (A-1) a monofunctional (meth)acrylate whose homopolymer has a Tg of −100° C. to 60° C., and (A-2) a polyfunctional (meth)acrylate; (B) a polyisobutene homopolymer; and (C) a photo radical polymerization initiator.