公开(公告)号：US20220033655A1

公开(公告)日：2022-02-03

申请号：US17492937

申请日：2021-10-04

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G77/60 ,  C08L69/00

Abstract: A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

公开(公告)号：US20230357511A1

公开(公告)日：2023-11-09

申请号：US18027171

申请日：2021-09-22

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Hisato AKIMOTO ,  Kohei KAMATANI ,  Daisuke TAGUCHI ,  Kazuyoshi UERA

IPC: C08G77/18 ,  C08G77/08 ,  G02B1/04 ,  C08L83/06

CPC classification number: C08G77/18 ,  C08G77/08 ,  G02B1/041 ,  C08L83/06

Abstract: The present invention provides, for example, a method for efficiently producing a polysiloxane having a siloxane constituent unit while making it possible to improve safety and reduce environmental burden. The above-mentioned problem is solved by a method comprising a polymerization step of polymerizing a silane-based compound and a diol compound in the presence of a transesterification catalyst including at least a phosphorus compound, in which the silane-based compound is selected from a specific diaryloxysilane compound, a specific dialkoxysilane compound, and a specific silicon compound, and in the polymerization step, a polysiloxane having a siloxane constituent unit represented by any of formula (1-1) to formula (1-4) is produced. (In the formulas, R1-R10, R30-R33, Z1, Z2, J1, K1, A1, A2, L1, L2, and X are as described in the description of the present application.)

公开(公告)号：US20230331925A1

公开(公告)日：2023-10-19

申请号：US18027164

申请日：2021-09-22

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Daisuke TAGUCHI ,  Kohei KAMATANI ,  Hisato AKIMOTO ,  Kazuyoshi UERA

IPC: C08G77/52 ,  C08L83/14 ,  G02B1/04

CPC classification number: C08G77/52 ,  C08L83/14 ,  G02B1/041

Abstract: The problem of the present invention is to provide: a thermoplastic resin having excellent heat resistance and excellent flame retardancy and having a siloxane constituent unit, particularly a thermoplastic resin suitable for optical applications; a composition containing the thermoplastic resin; and others. The problem is solved by a thermoplastic resin containing a structural unit (A) represented by general formula (I). (In general formula (I), Ra to Rct independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms in total and optionally having a substituent, or an aryl group having 6 to 30 carbon atoms in total and optionally having a substituent; Xa and Xb independently represent an alkyl group having 1 to 20 carbon atoms in total and optionally having a substituent, or an aryl group having 6 to 30 carbon atoms in total and optionally having a substituent; the substituent is any one of a halogen atom, a cyano group, an alkenyl group, an alkynyl group and an alkoxy group; and m represents an integer of 1 to 3.)

公开(公告)号：US20220169788A1

公开(公告)日：2022-06-02

申请号：US17439490

申请日：2020-03-19

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08G64/38 ,  C08G64/16

Abstract: A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

公开(公告)号：US20250115762A1

公开(公告)日：2025-04-10

申请号：US18979894

申请日：2024-12-13

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G64/08 ,  C08G64/16 ,  C08G64/38 ,  C08G77/00 ,  C08G77/08 ,  C08G77/448 ,  C08G77/60 ,  C08L69/00 ,  G02B1/04

Abstract: A polysiloxane compound is disclosed which has siloxane constituent units represented by any of formulae (1-2) to (1-4) and prescribed polycarbonate constituent units. Also disclosed are articles comprising the polysiloxane compound, including molded bodies and optical lenses, as well as methods of manufacturing the polysiloxane compounds and of manufacturing articles comprising the polysiloxane compounds.

公开(公告)号：US20240124712A1

公开(公告)日：2024-04-18

申请号：US18515885

申请日：2023-11-21

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Keisuke TOMITA ,  Hisato AKIMOTO

IPC: C08L83/16 ,  C08G64/16 ,  C08G64/38 ,  C08G77/60 ,  C08L69/00

CPC classification number: C08L83/16 ,  C08G64/1666 ,  C08G64/38 ,  C08G77/60 ,  C08L69/00 ,  C08G77/80

Abstract: A polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1) to (1-4) and prescribed polycarbonate constituent units.

公开(公告)号：US20230340177A1

公开(公告)日：2023-10-26

申请号：US18026697

申请日：2021-09-22

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Kohei KAMATANI ,  Hisato AKIMOTO ,  Daisuke TAGUCHI

IPC: C08F293/00 ,  C08G77/42

CPC classification number: C08F293/00 ,  C08G77/42

Abstract: To provide a composition containing a siloxane block-containing diol compound that is easy to manufacture industrially.
A composition containing a siloxane block-containing diol compound, wherein
the siloxane block-containing diol compound is represented by the following formula (I):




wherein
R1 and R2 are each independently an alkyl group having 1 to 20 carbon atoms which may have a substituent, or an aryl group having 6 to 30 carbon atoms which may have a substituent,
m is an integer of 1 to 25,
n is an integer of 3 to 200, and
Xs each independently represent any of the following formulae (I1) to (I6):

公开(公告)号：US20220185830A1

公开(公告)日：2022-06-16

申请号：US17439954

申请日：2020-03-19

Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.

Inventor： Kazuyoshi UERA ,  Syouichi ITOH ,  Kohei KAMATANI

IPC: C07F7/18

Abstract: Provided is a method for producing a silane compound, which does not produce corrosive substances such as acids, does not use organic solvents and which contributes to a reduction in environmental load. This method for producing a silane compound has D) a siloxane decomposition step for heating a mixture containing: a siloxane compound A), which is a cyclic siloxane compound A-1) represented by formula (1), a linear siloxane compound A-2) represented by formula (2) and/or a silsesquioxane compound that is represented by formula (3) and has a siloxane bond as a main chain skeleton; a carbonate compound B) including at least one of a diaryl carbonate, a dialkyl carbonate and a monoalkylmonoaryl carbonate; and a basic compound catalyst C). The step D) further includes subjecting the siloxane compound A) to alkoxylation and/or aryloxylation. (In the formulae, R1 to R5, X, n, m and pare as described in the description of the present application.)