公开(公告)号：US20240132633A1

公开(公告)日：2024-04-25

申请号：US18534128

申请日：2023-12-08

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Sota YUASA ,  Tatsuya Morikawa ,  Rina Tamai ,  Kouhei Takemura ,  Masaki Irie

IPC: C08F2/16 ,  C08F14/22

CPC classification number: C08F2/16 ,  C08F14/22 ,  C08F2800/10

Abstract: A method for producing an aqueous dispersion of a fluorine-containing elastomer, which includes polymerizing a fluorine-containing monomer in the presence of an aqueous medium and a fluorine-containing compound (A), wherein the fluorine-containing elastomer contains a methylene group in a main chain, the fluorine-containing compound (A) is a compound represented by general formula (A):


CXiXk═CXjRa—(CZ1Z2)k—Y3  (A)

wherein Xi, Xj, and Xk are the same or different and are F, Cl, H, or CF3; Y3 is a hydrophilic group; Ra is a linking group; Z1 and Z2 are the same or different and are H, F, or CF3; and k is 0 or 1; provided that at least one of Xi, Xk, Xj, Ra, Z1, and Z2 includes F; and the number of carbon atoms in a portion excluding the hydrophilic group is 6 or less, and the fluorine-containing compound (A) is fed after polymerization is initiated.

公开(公告)号：US20230167219A1

公开(公告)日：2023-06-01

申请号：US18160129

申请日：2023-01-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Rina TAMAI ,  Tatsuya MORIKAWA ,  Sota YUASA ,  Kouhei TAKEMURA ,  Masaki IRIE

IPC: C08F291/06 ,  C08K5/02

CPC classification number: C08F291/06 ,  C08K5/02

Abstract: Provided is a method for producing an aqueous dispersion of a fluorine-containing elastomer, comprising polymerizing a fluorine-containing monomer in the presence of a compound (1) having a triple bond and a hydrophilic group and an aqueous medium to produce an aqueous dispersion of a fluorine-containing elastomer.

公开(公告)号：US20230167212A1

公开(公告)日：2023-06-01

申请号：US18159999

申请日：2023-01-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Rina TAMAI ,  Tatsuya MORIKAWA ,  Sota YUASA ,  Kouhei TAKEMURA ,  Masaki IRIE

IPC: C08F214/22 ,  C08L27/20

CPC classification number: C08F214/22 ,  C08L27/20 ,  C08L2201/54

Abstract: A method for producing an aqueous dispersion of a fluorine-containing elastomer, which includes polymerizing a fluorine-containing monomer in the presence of a fluorine-free compound (1) represented by general formula (1): CR1X1═CX2—R2—COOM and an aqueous medium, to produce an aqueous dispersion of the fluorine-containing elastomer containing —CH2— in a main chain. Also disclosed is an aqueous dispersion of the fluorine-containing elastomer and a composition containing the fluorine-containing elastomer.

公开(公告)号：US20230322975A1

公开(公告)日：2023-10-12

申请号：US18320567

申请日：2023-05-19

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Sota YUASA ,  Tatsuya Morikawa ,  Rina Tamai ,  Kouhei Takemura ,  Masaki Irie

IPC: C08F14/22

CPC classification number: C08F14/22

Abstract: Provided is a method for producing an aqueous dispersion of a fluorine-containing elastomer, comprising polymerizing a fluorine-containing monomer in the presence of a polymer (1) containing a polymerization unit (1) based on a monomer (1) represented by general formula (1) and an aqueous medium,


CF2═CF—R—CZ1Z2—COOM  (1)

wherein R is a linking group, Z1 and Z2 are each independently F or CF3, and M is H, a metal atom, NR74, imidazolium optionally having a substituent, pyridinium optionally having a substituent, or phosphonium optionally having a substituent, wherein R7 is H or an organic group.

公开(公告)号：US20230167213A1

公开(公告)日：2023-06-01

申请号：US18160384

申请日：2023-01-27

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Rina TAMAI ,  Tatsuya MORIKAWA ,  Sota YUASA ,  Kouhei TAKEMURA ,  Masaki IRIE

IPC: C08F214/22

CPC classification number: C08F214/22 ,  C08F2800/10

Abstract: Provided is a method for producing an aqueous dispersion of a fluorine-containing elastomer, comprising polymerizing a fluorine-containing monomer in the presence of a fluorine-containing compound (1) represented by general formula (1) and an aqueous medium to produce an aqueous dispersion of a fluorine-containing elastomer:


CX1X2═CX3—Z  General formula (1):

wherein X1 to X3 are each independently H, F, or a fluorine-containing alkyl group; when X1 and X2 are both H, X3 is F or a fluorine-containing alkyl group; Z is a group represented by —COOM, —SO3M, —OSO3M, —PO(OM)2, —OPO(OM)2, —BO(OM)2, or —OBO(OM)2; M is H, a metal atom, NR14, optionally substituted imidazolium, optionally substituted pyridinium, or optionally substituted phosphonium; and R1 is independently H or an organic group, and any two R1 are optionally bonded to each other to form a ring.