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    METHOD FOR OBTAINING BIOSOURCED POLYEPOXIDES WITH IMPROVED PROPERTIES
    2.
    发明公开
    METHOD FOR OBTAINING BIOSOURCED POLYEPOXIDES WITH IMPROVED PROPERTIES 审中-公开

    公开(公告)号：US20230242702A1

    公开(公告)日：2023-08-03

    申请号：US18002790

    申请日：2021-06-25

    申请人： ROQUETTE FRERES

    发明人： Théodore VANBESIEN ,  Hélène AMEDRO ,  Audrey SAHUT ,  René SAINT-LOUP

    IPC分类号： C08G59/18 ,  C08G59/50 ,  C08G59/68 ,  C07D303/18

    CPC分类号： C08G59/184 ,  C08G59/5026 ,  C08G59/686 ,  C07D303/18 ,  C08G2650/36

    摘要： The invention relates to a method for preparing an epoxy prepolymer composition comprising glycidyl ethers, said method comprising the following steps:

    a) placing a dianhydrohexitol into contact with another alcohol so as to obtain a composition of alcohols;
    b) reacting the composition of alcohols obtained in step a) with an epihalohydrin so as to obtain a reaction mixture comprising glycidyl ethers;
    c) recovering the epoxy prepolymer composition comprising glycidyl ethers from the reaction mixture obtained at the end of step b);

    The invention also relates to an epoxy prepolymer composition that can be obtained by said method, a curable composition comprising said epoxy prepolymer composition, a polyepoxide obtained by curing said curable composition and a composite material, coating or adhesive comprising said polyepoxide.

    AQUEOUS POLYURETHANE AND POLYURETHANE/POLY(METH)ACRYLATE HYBRID DISPERSIONS
    6.
    发明公开
    AQUEOUS POLYURETHANE AND POLYURETHANE/POLY(METH)ACRYLATE HYBRID DISPERSIONS 审中-公开

    公开(公告)号：US20240191018A1

    公开(公告)日：2024-06-13

    申请号：US18286773

    申请日：2022-04-11

    申请人： BASF SE

    发明人： Samane MEHRAVAR ,  Manfred DARGATZ ,  Paola URIBE AROCHA ,  Daniel VON NESSEN ,  Chintankumar Jayantilal PATEL

    IPC分类号： C08G18/34 ,  C08G18/10 ,  C09D175/06

    CPC分类号： C08G18/348 ,  C08G18/10 ,  C09D175/06 ,  C08G2650/36

    摘要： The present invention relates a process of the present invention for the preparation of an aqueous composition comprising a polyurethane carrying COOH groups and/or salt groups thereof, comprises the steps of (i) reacting at least one first polyisocyanate (A1) with at least one polyol carrying at least one COOH group (BX) and optionally at least one first polyol carrying no COOH group (B1) to form a first composition (C1), (ii) treating the first composition (C1) obtained in step (i) with at least one second polyol carrying no COOH group (B2), and optionally with at least one second polyisocyanate (A2), to form a second composition (C2), and (iii) optionally treating the second composition (C2) obtained in step (ii) with at least one third-polyisocyanate (A3), to form a third composition (C3), wherein step (i) is stopped at a reaction index in the range of 0.05 to 0.94, wherein reaction index=reaction rate×[mol initial NCO groups of all A1/(mol initial OH groups of all BX and, if present, mol initial OH groups of all B1)] (formula 1) wherein reaction rate=1 minus (mol NCO groups of C1/mol initial NCO groups of all A1), and to an aqueous composition comprising a polyurethane carrying COOH groups and/or salt groups thereof obtainableby this process, to a process for the preparation of an aqueous composition comprising a polyurethane/poly(meth)acrylate hybrid polymer using the aqueous composition comprising a polyurethane carrying COOH groups and/or salt groups thereof of the present invention, to aqueous compositions comprising a polyurethane/poly(meth)acrylate hybrid polymer obtainable by the this process, to coating compositions comprising the aqueous composition comprising a polyurethane carrying COOH groups and/or salt groups thereof or the aqueous compositions comprising a polyurethane/poly(meth)acrylate hybrid polymer, and to substrates coated with these coating compositions.

    RESIN COMPOSITION AND ARTICLE MADE THEREFROM
    7.
    发明公开
    RESIN COMPOSITION AND ARTICLE MADE THEREFROM 审中-公开

    公开(公告)号：US20240002596A1

    公开(公告)日：2024-01-04

    申请号：US17848775

    申请日：2022-06-24

    申请人： Elite Electronic Material (KunShan) Co., Ltd.

    发明人： Rongtao WANG ,  Chenyu SHEN ,  Jue TAN

    IPC分类号： C08G65/38 ,  C08K5/5399 ,  C08K5/3415 ,  C08K5/3432

    CPC分类号： C08G65/38 ,  C08K5/5399 ,  C08G2650/56 ,  C08K5/3432 ,  C08G2650/36 ,  C08K5/3415

    摘要： A resin composition includes the following components or a prepolymer thereof: (A) 100 parts by weight of an unsaturated C═C double bond-containing polyphenylene ether resin; and (B) 10 parts by weight to 50 parts by weight of a compound of Formula (1), having a pH value of 10 or less. In Formula (1), n is an integer of 3 to 6, each Y and Z are independently selected from o-vinylphenoxy group and phenoxy group, and each Y and Z are not phenoxy group at the same time. The prepolymer is prepared by subjecting a mixture to a prepolymerization reaction, and the mixture at least comprises the component (A) and the component (B). An article is made from the resin composition. The article includes a prepreg, a resin film, a laminate or a printed circuit board and achieves improvements in one or more properties including resin filling uniformity, dissipation factor variation rate under heat, glass transition temperature, Z-axis ratio of thermal expansion, peeling strength and thermal resistance after moisture absorption.