BLOCK COPOLYMER AND ADHESIVE
    2.
    发明申请

    公开(公告)号:US20220289886A1

    公开(公告)日:2022-09-15

    申请号:US17688950

    申请日:2022-03-08

    摘要: Provided is a block copolymer containing 10 mass % or more of a polymer (A1) having a multi-branched structure having four or more polymer chains, the polymer chain having a polymer block A containing 70 mass % or more of a structural unit derived from a conjugated diene compound and a polymer block B containing 70 mass % or more of a structural unit derived from an aromatic vinyl compound, the block copolymer having a functional group F containing at least one element selected from the group consisting of nitrogen, silicon, oxygen, and sulfur in a part or all of terminals of the four or more polymer chains, and the block copolymer having a value α of 0.75 or more represented by the following equation (i), when p, q, r, and s are defined as component proportions (molar proportions) of structural unit represented by the following formula (1) to formula (4), in the polymer, respectively.

    ORGANIC SILICON COMPOUND, AND ADDITIVE FOR RUBBER AND RUBBER COMPOSITION USING SAME

    公开(公告)号:US20200317701A1

    公开(公告)日:2020-10-08

    申请号:US16303448

    申请日:2016-08-18

    发明人: Munenao HIROKAMI

    摘要: Provided is an organic silicon compound represented by formula (1), which when added to a rubber composition, can improve the wet traction performance of a cured product of the rubber composition, and significantly reduce a hysteresis loss of the cured product, and provides a rubber composition that can be used to implement a desired tire having high fuel efficiency. (In the formula, each R1 independently represents an alkyl group having 1-10 carbon atoms or an aryl group having 6-10 carbon atoms, each R2 independently represents an alkyl group having 1-10 carbon atoms or an aryl group having 6-10 carbon atoms, f represents a number equal to or larger than 0, e, g, and h each independently represent a number equal to or larger than 0, and m represents an integer of 1-3. Note that the repeating units can be present in any order.)

    METHOD OF MAKING A FUNCTIONALIZED ELASTOMER
    7.
    发明申请

    公开(公告)号:US20190055334A1

    公开(公告)日:2019-02-21

    申请号:US15677515

    申请日:2017-08-15

    摘要: The present invention is directed to a method of making an amine functionalized elastomer, comprising the steps of polymerizing at least one first monomer selected from the group consisting of 1,3-butadiene and isoprene and a second monomer of formula I in the presence of a polymerization catalyst in a hydrocarbon solvent to form a first copolymer in solution; where R1 is phenylene, a linear or branched alkane diyl group containing from 1 to 10 carbon atoms, or a combination of one or more phenylene groups and one or more linear or branched alkane diyl groups containing from 1 to 10 carbon atoms; and R2 is methyl or ethyl; and mixing the first copolymer in solution with a protic solvent followed by stirring to convert the first copolymer to a second copolymer given by the formula poly(M1 co M2) wherein M1 is the first monomer and M2 is of formula II where R1 is as previously defined.

    CROSS-LINKED RUBBER
    10.
    发明申请
    CROSS-LINKED RUBBER 审中-公开

    公开(公告)号:US20170226254A1

    公开(公告)日:2017-08-10

    申请号:US15514580

    申请日:2015-09-25

    申请人: ZEON CORPORATION

    发明人: Kentaro MORI

    IPC分类号: C08F236/14 C08C19/22

    摘要: A cross-linked rubber obtained by cross-linking a nitrile rubber composition, wherein the nitrile rubber composition contains a carboxyl group-containing nitrile rubber (a) with an iodine value of 120 or less and a diurethane compound (b) represented by a following general formula (1), a content of the diurethane compound (b) in the nitrile rubber composition is 5 to 15 parts by weight with respect to 100 parts by weight of the carboxyl group-containing nitrile rubber (a), and a tensile strength of the cross-linked rubber based on JIS K6251 is 15 MPa or more and an elongation at break of the cross-linked rubber based on JIS K6251 is 300% or more, is provided.