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    PERFLUORINATED THERMOPLASTIC ELASTOMER
    1.
    发明申请
    PERFLUORINATED THERMOPLASTIC ELASTOMER 有权

    公开(公告)号：US20210139630A1

    公开(公告)日：2021-05-13

    申请号：US16486701

    申请日：2018-02-09

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

    Inventor： Marco DOSSI ,  Marco AVATANEO ,  Pasqua COLAIANNA ,  Claudia MANZONI

    IPC: C08F293/00 ,  B33Y70/00 ,  B29C64/40 ,  B29C64/106

    Abstract: The invention pertains to certain perfluorinated thermoplastic elastomers suitable for being processed through additive manufacturing techniques, thanks to their surprising ability to possess better processability (notably more significant shear thinning at processability temperature) than corresponding perfluorinated thermoplasts, which possess similar product profile and hence performances, offering hence advantages in throughput and part design accurate control, containment of degradation, reduction of fumes, and yet delivering parts with outstanding chemical resistance.

    METHOD OF MANUFACTURING FLUOROELASTOMERS
    3.
    发明申请
    METHOD OF MANUFACTURING FLUOROELASTOMERS 审中-公开

    公开(公告)号：US20180371135A1

    公开(公告)日：2018-12-27

    申请号：US16061965

    申请日：2016-12-14

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

    Inventor： Marco DOSSI ,  Marco AVATANEO

    IPC: C08F214/26 ,  C08F214/22

    Abstract: The invention pertains to a method for manufacturing a (per)fluoroelastomer [fluoroelastomer (A)] comprising the following steps: step (a): polymerizing in an aqueous emulsion in the presence of a surfactant by feeding in a first reactor comprising feeding the following ingredients: (i) a monomer mixture [mixture (M1)] comprising at least one fluoromonomer [monomer (F)], (ii) at least one iodinated and/or brominated chain-transfer agent(s), (iii) at least one branching agent possessing at least two ethylenic unsaturations; and (iv) at least one radical initiator, so as to obtain a pre-polymer latex [latex (P)]; step (b): recovering the said latex (P) from the said first reactor and storing the same in a storage tank; and step (c): feeding the said latex (P) from the said storage tank to a second reactor; step (d): polymerizing in the said second reactor at least a second monomer mixture [mixture (M2)] comprising at least one monomer (F) in the presence of a radical initiator, so as to obtain a final latex [latex (F)]; and step (d): recovering the (per)fluoroelastomer from the said latex (F).

    METHOD FOR THE CONTROLLED POLYMERIZATION OF FLUOROMONOMERS
    4.
    发明申请
    METHOD FOR THE CONTROLLED POLYMERIZATION OF FLUOROMONOMERS 审中-公开

    公开(公告)号：US20170081447A1

    公开(公告)日：2017-03-23

    申请号：US15310749

    申请日：2015-05-11

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

    Inventor： Marco DOSSI ,  Giovanni COMINO ,  Laura PONTA

    IPC: C08F214/22 ,  C08L27/16

    CPC classification number: C08F214/22 ,  C08F2/22 ,  C08F2/38 ,  C08F14/22 ,  C08F14/26 ,  C08F214/222 ,  C08F214/225 ,  C08F214/262 ,  C08F214/265 ,  C08L27/16 ,  C08L2201/52

    Abstract: The invention pertains to a method for emulsion polymerization of at least one fluoromonomer, said method comprising: (i) providing at least one aqueous emulsion comprising at least one surfactant and a monomer mixture [mixture (M)] comprising at least one fluoromonomer [monomer (F)] and optionally at least one additional monomer, and at least one RAFT/MADIX agent; (ii) initiating the polymerization of said monomer mixture in said aqueous emulsion adding at least one radical initiator; (iii) continuing the polymerization by adding additional amounts of said mixture (M) and said RAFT/MADIX agent, until converting the targeted amount of said mixture (M), and (iv) terminating the polymerization and recovering a latex of fluoropolymer [polymer (F)]; wherein the amount of RAFT/MADIX agent is comprised between 0.1 and 0.5% moles, with respect to the total amount of converted monomers of said monomer mixture, and wherein the amount of said RAFT/MADIX agent present in the aqueous emulsion when initiating the polymerization in step (ii) is of at most 50% with respect to the total amount of said RAFT/MADIX agent.

    FLUORINATED THERMOPLASTIC ELASTOMERS
    5.
    发明申请
    FLUORINATED THERMOPLASTIC ELASTOMERS 有权

    公开(公告)号：US20210155732A1

    公开(公告)日：2021-05-27

    申请号：US16492022

    申请日：2018-03-06

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

    Inventor： Serena CARELLA ,  Giulio BRINATI ,  Marco DOSSI

    IPC: C08F293/00

    Abstract: The invention pertains to novel fluorinated thermoplastic elastomers, including ECTFE-like plastomeric blocks characterized by lower crystallinity and assembling in the solid state under the form of homogeneously dispersed fine spherulites, contributing substantially to the improvement of sealing performances of the fluorinated thermoplastic elastomers comprising the same.

    FLUOROELASTOMER COMPOSITION
    8.
    发明申请
    FLUOROELASTOMER COMPOSITION 审中-公开

    公开(公告)号：US20180258206A1

    公开(公告)日：2018-09-13

    申请号：US15760810

    申请日：2016-09-16

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

    Inventor： Marco DOSSI ,  Marco AVATANEO ,  Terry Michael KITCHENS

    IPC: C08F214/22

    CPC classification number: C08F214/22 ,  C08F214/222 ,  C08F214/225

    Abstract: The invention pertains to a fluoroelastomer composition comprising: (a) a vinylidene fluoride-based fluoroelastomer [fluoroelastomer (A)] comprising recurring units derived from vinylidene fluoride (VDF) and recurring units derived from at least one additional (per)fluorinated monomer; said fluoroelastomer (A): —possessing a polydispersity index (IMWD) of between 1.5 and 3.5, —comprising an amount of polar end groups of formula —CF2CH2OH of at least 3 mmol/kg and at most 6 mmol/kg, and —further comprising end of chain groups of formula —CF2H, —CF2CH3, and, optionally, —OC(0)—RH (with RH being a C1-C6 alkyl group) in an amount such to satisfy the following inequality: [—CF2CH2OH]+[—CF2H]+[—CF2CH3H—OC(0)RH]≤30+(2×106)/Mn, (b) at least one polyhydroxylated curing agent; (c) at least one accelerant; (d) at least one metal oxide selected from the group consisting of divalent metal oxides; and (e) optionally, at least one metal hydroxide, wherein the amount of said metal hydroxide, if present, is below 3 phr, based on 100 weight parts of fluoroelastomer (A).

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