PROCESS FOR MAKING A FLUOROPOLYMER DISPERSION

    公开(公告)号:US20220073721A1

    公开(公告)日:2022-03-10

    申请号:US17291002

    申请日:2019-11-06

    Applicant: Arkema Inc.

    Abstract: The invention relates to a process to produce a stable fluoropolymer latex using non-fluorinated surfactant with greater thermal stability. The polymerization is run at pressures greater than typically used. The resulting polymer exhibit improved melt color stability as compared to those produced under similar conditions at lower pressures.

    FLUOROPOLYMER-BASED POWDER COATING

    公开(公告)号:US20210171793A1

    公开(公告)日:2021-06-10

    申请号:US17052285

    申请日:2019-05-07

    Applicant: Arkema Inc.

    Abstract: A fluoropolymer-based powdered composition is disclosed. The fluoropolymer has a very low melt viscosity, of less than 2 kilopoise (kP) at 230° C. and 100 s−1 and molecular weights of from 15 kDa to 200 kDa. The composition can be used for powder coating or rotolining processes. The coatings or interior surfaces of the coated or rotolined parts exhibit roughness values, Ra, of less than 25 μin (0.64 μm) corresponding to very smooth surfaces. The coating exhibit very good adhesion to substrates with and without surface preparation as well as very good adhesion to substrates with and without primer.

    HIGH SOLIDS, SURFACTANT-FREE FLUOROPOLYMER

    公开(公告)号:US20210070897A1

    公开(公告)日:2021-03-11

    申请号:US16981449

    申请日:2019-03-15

    Applicant: Arkema Inc.

    Abstract: The invention relates to a low coagulum fluoropolymer latex containing little or no surfactant, and having a high fluoropolymer solids content. The polymerization is run at temperatures somewhat greater than typically used. The latex can be dried into a solid resin, in which little or no surfactant is present, without using an ion exchange, washing, or other added unit operation. The invention also relates to the process for forming the high solids, latex, using little or no surfactant.

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