SULFURIC ACID ESTER OR SALT THEREOF, AND SURFACTANT

    公开(公告)号:US20210340098A1

    公开(公告)日:2021-11-04

    申请号:US17351022

    申请日:2021-06-17

    Abstract: A sulfuric acid ester containing a plurality of carbonyl groups or a salt thereof, and a surfactant. The sulfuric acid ester is a compound represented by the following formula: R1—C(═O)—R2—C(═O)—R3—OSO3X wherein R1, R2 and R3 are defined herein; X is H, a metal atom, NR44, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, where R4s are each H or an organic group and are the same as or different from each other; and any two of R1, R2, and R3 optionally bind to each other to form a ring. Also disclosed is a surfactant containing the sulfuric acid ester and an aqueous dispersant containing the sulfuric acid ester.

    METHOD FOR PRODUCING FLUOROPOLYMER
    5.
    发明公开

    公开(公告)号:US20230331886A1

    公开(公告)日:2023-10-19

    申请号:US18340164

    申请日:2023-06-23

    CPC classification number: C08F214/242 C08F214/245 C08F2/06 C08K5/06

    Abstract: A method for producing a fluoropolymer, which includes polymerizing a fluoromonomer in a solvent to produce the fluoropolymer. The solvent contains a fluorine-containing ether compound (1) represented by


    formula:R1—O—R2

    wherein R1 represents a partially fluorinated alkyl group, and R2 represents a non-fluorinated alkyl group, a partially fluorinated alkyl group, or a completely fluorinated alkyl group, and in the solvent, a content of a fluorine-containing olefin compound (2) represented by


    formula:R3—CF═CF—R4—O—R2

    wherein R3 represents H, F, a partially fluorinated alkyl group, or a completely fluorinated alkyl group, R4 represents a single bond, a partially fluorinated alkylene group, or a completely fluorinated alkylene group, and R2 is the same as described above, is 1.00% by mass or less based on a content of the fluorine-containing ether compound (1), and wherein the fluoromonomer is selected from tetrafluoroethylene, chlorotrifluoroethylene, and vinylidene fluoride.

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