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    Trialkoxy functional branched siloxane compositions
    5.
    发明授权
    Trialkoxy functional branched siloxane compositions 有权

    公开(公告)号：US11655369B2

    公开(公告)日：2023-05-23

    申请号：US17439855

    申请日：2020-10-28

    申请人： Dow Silicones Corporation

    发明人： Dorab Bhagwagar ,  Peng Wei ,  Qianqing Ge ,  Yan Zheng ,  Zhanjie Li

    IPC分类号： C08L83/04 ,  C08K3/013

    CPC分类号： C08L83/04 ,  C08K3/013 ,  C08K2201/001

    摘要： A composition contains an organopolysiloxane having the average chemical structure (I):

    [R′R2SiO—(R2SiO)m]3—Si—[OSiR2]n—Y—Si(OR)3  (I)

    where: R is independently in each occurrence selected from alkyl, aryl, substituted alkyl and substituted alkyl groups having from one to 8 carbon atoms; R′ is independently in each occurrence selected from R and terminally unsaturated alkylene groups having from 2 to 6 carbon atoms; Y is selected from a group consisting of: X, and X—(R2SiO)pSiR2—X; where p has an average value in a range of one to 3; and X is independently in each occurrence selected from alkylene and substituted alkylene groups having from one to 6 carbon atoms; and the average values for subscripts m and n are each greater than zero and independently selected so that the average value for the sum of all of the average m values and the average n value is in a range of 30-200.

    SILICONE COMPOSITION COMPRISING FILLER
    6.
    发明申请
    SILICONE COMPOSITION COMPRISING FILLER 审中-公开

    公开(公告)号：US20200224031A1

    公开(公告)日：2020-07-16

    申请号：US16629978

    申请日：2017-09-29

    申请人： Dow Silicones Corporation

    发明人： Yan Zheng ,  Zhongwei Cao ,  Don Kleyer ,  Tassie Andersen

    IPC分类号： C08L83/04

    摘要： A composition comprising: (A) an organopolysiloxane, (B) a filler and (C) a filler treatment agent, comprising a mixture of two organopolysiloxanes having the general formulas (I) and (II), R1R2R3Si—[ (CH2)m1 (Me2SiO)m1]r—[O-(Me2SiO)m3]p-(Me2Si)0 (CH2)m2 (Me2SiO)m2—(CH2)m3—Si (OR43)3 (I), wherein ‘Me’ is methyl group, R1, R2 and R3 are independently selected from an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, an alkoxy group having 1 to 3 carbon atoms or (OSiR7R8R9), in which R7, R8 and R9 are independently selected from an alkyl group having 1 to 4 carbon atoms, R4 is an alkyl group having 1 to 4 carbon atoms, n1, n2, m1, m3 and o are integers from 1 to 200, m2, n3, r and p are integers from 0 to 200, r and p are not 0 at the same time, (R5O)3Si—[(CH2)n1(Me2SiO)m1]r—(CH2)n4—[O-(Me2SiO)m3]p-(Me2Si)o-(CH2)m2— (Me2SiO)m2—(CH2)n3—Si(OR6)3 (II), wherein R5 and R6 are an alkyl group having 1 to 4 carbon atoms, n1, m1, m3, o and n2 are integers from 1 to 200, n3, n4, m2, r and p are integers from 0 to 200, r and p are not 0 at the same time.

    ALUMINUM NITRIDE FILLED THERMALLY CONDUCTIVE SILICONE COMPOSITION
    7.
    发明公开
    ALUMINUM NITRIDE FILLED THERMALLY CONDUCTIVE SILICONE COMPOSITION 审中-公开

    公开(公告)号：US20230313016A1

    公开(公告)日：2023-10-05

    申请号：US18041749

    申请日：2020-11-10

    申请人： Dow Silicones Corporation

    发明人： Yan Zheng ,  Dorab Bhagwagar ,  Darren Hansen ,  Peng Wei ,  Han Guang Wu

    IPC分类号： C09K5/14 ,  C08L83/04 ,  C08K13/04 ,  H05K7/20

    CPC分类号： C09K5/14 ,  C08L83/04 ,  C08K13/04 ,  H05K7/2039 ,  C08L2205/025 ,  C08L2203/20 ,  C08L2312/00 ,  C08K5/5419

    摘要： A composition contains: (a) curable silicone composition including: (i) a vinyldimethylsiloxy-terminated polydimethylpolysiloxane with a viscosity of 30 to 400 mPa*s; (ii) a SiH functional crosslinker; and (iii) a hydrosilylation catalyst; where the molar ratio of crosslinker SiH functionality to vinyl functionality is 0.5:1 to 1:1; (b) alkyl trialkoxysilane and/or a mono-trialkoxysiloxy terminated dimethylpolysiloxane treating agent; (c) filler mix containing: (i) 40 wt % or more of spherical and irregular shaped AlN particles, both having an average size of 30 micrometers or more, the spherical AlN fillers are 40-60 wt % of the weight of the AlN fillers; (ii) 25-35 wt % spherical Al2O3 particles with an average size of 1-5 micrometers; (iii) 10-15 wt % of additional thermally conductive filler with a 0.1-0.5 micrometer average size; and (iv) optionally, BN fillers having an average size greater than 20 micrometers; where filler mix is 90-97 wt % and wt % is relative to composition weight unless otherwise stated.

    THERMALLY CONDUCTIVE SILICONE COMPOSITION
    8.
    发明公开
    THERMALLY CONDUCTIVE SILICONE COMPOSITION 审中-公开

    公开(公告)号：US20240279525A1

    公开(公告)日：2024-08-22

    申请号：US18566121

    申请日：2021-08-19

    申请人： Dow Silicones Corporation

    发明人： Yan Zheng ,  Dorab Bhagwagar ,  Qianqing Ge ,  Peng Wei ,  Han Guang Wu

    IPC分类号： C09K5/14 ,  C08G77/12 ,  C08G77/20 ,  C08K3/22 ,  C08K3/28 ,  C08K7/18 ,  C08K9/08 ,  C08K13/06 ,  H05K7/20

    CPC分类号： C09K5/14 ,  C08G77/12 ,  C08G77/20 ,  C08K13/06 ,  H05K7/2039 ,  C08K2003/2296 ,  C08K2003/282 ,  C08K7/18 ,  C08K9/08 ,  C08K2201/001 ,  C08K2201/005

    摘要： A composition contains: (A) a curable silicone composition including: (a1) a vinyldimethylsiloxy-terminated polydimethylpolysiloxane having a viscosity in a range of 30-400 milliPascal*seconds, (a2) a silicon-hydride functional crosslinker, and (a3) a hydrosilylation catalyst, where the molar ratio of silicon-hydride functionality from the crosslinker to vinyl functionality is in a range of 0.5:1 to 1:1; (B) a filler treating agent comprising one or both of an alkyl trialkoxysilane and a mono-trialkoxysiloxy terminated dimethylpolysiloxane; and (C) a thermally conductive filler mixture including (c1) 40-55 wt % of aluminum nitride fillers, containing a blend of: (c1-a) 15-41 wt % of spherical aluminum nitride particles having a D50 particle size of 100 micrometers or more, and (c1-b) spherical or irregular shaped aluminum nitride particles having a D50 particle size of 20-80 micrometers; (c2) spherical aluminum oxide particles having a D50 particle size of 1-5 micrometers; and (c3) 10-20 wt % of irregular zinc oxide particles having a D50 particle size of 0.1-0.5 micrometer; where the total amount of the thermally conductive filler mixture is 94-97 wt %; and where wt % values are relative to the weight of the thermally conductive composition unless otherwise stated.

    Silicone composition comprising filler
    10.
    发明授权
    Silicone composition comprising filler 有权

    公开(公告)号：US11098196B2

    公开(公告)日：2021-08-24

    申请号：US16629978

    申请日：2017-09-29

    申请人： Dow Silicones Corporation

    发明人： Yan Zheng ,  Zhongwei Cao ,  Don Kleyer ,  Tassie Andersen

    IPC分类号： C08L83/04 ,  C08K3/013

    摘要： A composition comprising: (A) an organopolysiloxane, (B) a filler and (C) a filler treatment agent, comprising a mixture of two organopolysiloxanes having the general formulas (I) and (II), R1R2R3Si—[(CH2)n1(Me2SiO)m1]r—[O-(Me2SiO)m3]p-(Me2Si)o(CH2)n2(Me2SiO)m2—(CH2)n3—Si(OR43)3 (I), wherein ‘Me’ is methyl group, R1, R2 and R3 are independently selected from an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 4 carbon atoms, an alkoxy group having 1 to 3 carbon atoms or —(OSiR7R8R9), in which R7, R8 and R9 are independently selected from an alkyl group having 1 to 4 carbon atoms, R4 is an alkyl group having 1 to 4 carbon atoms, n1, n2, m1, m3 and o are integers from 1 to 200, m2, n3, r and p are integers from 0 to 200, r and p are not 0 at the same time, (R5O)3Si—[(CH2)n1(Me2SiO)m1]r—(CH2)n4—[O-(Me2SiO)m3]p-(Me2Si)o-(CH2)n2-(Me02SiO)m2—(CH2)n3—Si(OR6)3 (II), wherein R5 and R6 are an alkyl group having 1 to 4 carbon atoms, n1, m1, m3, o and n2 are integers from 1 to 200, n3, n4, m2, r and p are integers from 0 to 200, r and p are not 0 at the same time.