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    Process for manufacturing fluoropolymer composites
    1.
    发明授权
    Process for manufacturing fluoropolymer composites 有权

    公开(公告)号：US10138161B2

    公开(公告)日：2018-11-27

    申请号：US14895296

    申请日：2014-05-29

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Eliana Ieva ,  Rui Liu ,  Elisabetta Sartirana

    IPC: C08J5/04 ,  C03C25/305 ,  B29B15/12

    Abstract: The present invention pertains to a process for manufacturing a fluoropolymer composite, said process comprising the following sequential steps: (i) providing an aqueous latex comprising from 10% to 40% by weight, preferably from 15% to 35% by weight of at least one fluoropolymer comprising recurring units derived from vinylidene fluoride (VDF) [polymer (VDF)]; (ii) up-concentrating the aqueous latex provided in step (i) thereby providing an up-concentrated aqueous latex comprising from 45% to 60% by weight, preferably from 45% to 55% by weight of at least one polymer (VDF); (iii) contacting one continuous fiber or a bunch of continuous fibers with the up-concentrated aqueous latex provided in step (ii); (iv) squeezing the impregnated fibrous material provided in step (iii); (v) drying the squeezed fibrous material provided in step (iv), typically at a temperature comprised between 100° C. and 120° C.; (vi) baking the dried fibrous material provided in step (v) at a temperature comprised between 190° C. and 240° C.; (vii) cooling the coated fibrous material provided in step (vi), preferably to a temperature of about 20° C.; (viii) optionally, contacting the coated fibrous material provided in step (vii) with the up-concentrated aqueous latex provided in step (ii) and submitting the impregnated fibrous material so provided to sequential steps (iv) to (vii); and (ix) optionally, repeating step (viii) one or more times. The present invention also pertains to the fluoropolymer composite thereby provided and to uses of said fluoropolymer composite in various applications.

    METHOD FOR MANUFACTURING LOW-MOLECULAR-WEIGHT POLYTETRAFLUOROETHYLENE
    2.
    发明申请
    METHOD FOR MANUFACTURING LOW-MOLECULAR-WEIGHT POLYTETRAFLUOROETHYLENE 有权

    公开(公告)号：US20230032788A1

    公开(公告)日：2023-02-02

    申请号：US17788721

    申请日：2020-12-21

    Applicant: SOLVAY SPECIALTY POLYMERS ITALY S.P.A.

    Inventor： Vito Tortelli ,  Cristiano Monzani ,  Emanuela Antenucci ,  Eliana Ieva

    IPC: C08F114/26 ,  C08L27/18 ,  C08J3/28

    Abstract: The invention relates to a method for manufacturing low-molecular-weight polytetrafluoroethylene, comprising: a) a first step of mixing high-molecular-weight polytetrafluoroethylene with at least one additive selected from the group consisting of ethers having formula R1—O—R2, wherein R1 and R2 are independently selected among C1-C10 straight or branched aliphatic group, C4-C10 alicyclic or heterocyclic groups, C5-C10 aromatic or heteroaromatic groups; (per)fluorinated vinyl ethers; (per)fluorinated olefins; and optionally substituted aromatic hydrocarbons, and b) a second step of irradiating the so obtained mixture with ionizing radiation, said second step b) being carried out substantially in the absence of oxygen.

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