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    HIGH REFRACTIVE INDEX MATERIALS
    51.
    发明申请
    HIGH REFRACTIVE INDEX MATERIALS 审中-公开

    公开(公告)号：US20170096531A1

    公开(公告)日：2017-04-06

    申请号：US15282891

    申请日：2016-09-30

    申请人： Sharad D. Bhagat

    发明人： Sharad D. Bhagat

    IPC分类号： C08G75/024 ,  C08G75/0209 ,  G02B1/04 ,  C08G75/045

    CPC分类号： C08G75/024 ,  C08G75/0209 ,  C08G75/045 ,  G02B1/041

    摘要： In some cases, fabricating a high refractive index polymer composite may include combining a thiol monomer and an ene monomer to yield a composite mixture, heating the composite mixture to yield a homogenous composite mixture, and curing the homogeneous composite mixture to yield a polymer composite, wherein the ene monomer comprises zirconium oxo (meth)acrylate clusters. The refractive index of the high refractive index polymer composite may be at least 1.70. In certain cases, fabricating a high reactive index polymer composite includes combining a vinyl (ene) monomer, a thiol monomer, and zirconium oxo (meth)acrylate clusters to yield a composite mixture, heating the composite mixture to yield a homogenous composite mixture, and curing the homogeneous composite mixture to yield a polymer composite. The refractive index of the high refractive index polymer composite may be at least 1.75.

    Method for preparing aliphatic polythioether
    52.
    发明授权
    Method for preparing aliphatic polythioether 有权

    公开(公告)号：US11440995B2

    公开(公告)日：2022-09-13

    申请号：US17233413

    申请日：2021-04-16

    申请人： ZHEJIANG UNIVERSITY

    发明人： Xinghong Zhang ,  Chengjian Zhang

    IPC分类号： C08G75/0209 ,  C08G75/0268 ,  C08G75/02

    摘要： A method for preparing aliphatic polythioether is provided. In the method, aliphatic polythioether is obtained by polymerization reaction using a sulfur-carbon compound and an oxygen-containing monomer as raw materials and using Lewis base as a catalyst, and the polymerization reaction is performed under a self-generated pressure at 80˜180° C. Based on the defects of the traditional preparation process of aliphatic polythioether, a bran-new synthetic routine is provided, in which a new process for preparing polythioether in one-pot reaction is achieved through oxygen-sulfur exchange reaction between the sulfur-carbon compound and the oxygen-containing monomer.

    METHOD FOR PREPARING ALIPHATIC POLYTHIOETHER
    55.
    发明申请
    METHOD FOR PREPARING ALIPHATIC POLYTHIOETHER 有权

    公开(公告)号：US20210230371A1

    公开(公告)日：2021-07-29

    申请号：US17233413

    申请日：2021-04-16

    申请人： ZHEJIANG UNIVERSITY

    发明人： Xinghong ZHANG ,  Chengjian ZHANG

    IPC分类号： C08G75/0209 ,  C08G75/02 ,  C08G75/0268

    摘要： Disclosed is a method for preparing aliphatic polythioether. In the method, aliphatic polythioether is obtained by polymerization reaction using a sulfur-carbon compound and an oxygen-containing monomer as raw materials and using Lewis base as a catalyst, and the polymerization reaction is performed under a self-generated pressure at 80˜180° C. Based on the defects of the traditional preparation process of aliphatic polythioether, the disclosure provides a bran-new synthetic routine in which a new process for preparing polythioether in one-pot reaction is achieved through oxygen-sulfur exchange reaction between the sulfur-carbon compound and the oxygen-containing monomer.

    METHOD FOR PRODUCING GRANULAR POLYARYLENE SULFIDE, METHOD FOR INCREASING AVERAGE PARTICLE SIZE OF GRANULAR POLYARYLENE SULFIDE, METHOD FOR ENHANCING PARTICLE STRENGTH OF GRANULAR POLYARYLENE SULFIDE, AND GRANULAR POLYARYLENE SULFIDE
    60.
    发明申请
    METHOD FOR PRODUCING GRANULAR POLYARYLENE SULFIDE, METHOD FOR INCREASING AVERAGE PARTICLE SIZE OF GRANULAR POLYARYLENE SULFIDE, METHOD FOR ENHANCING PARTICLE STRENGTH OF GRANULAR POLYARYLENE SULFIDE, AND GRANULAR POLYARYLENE SULFIDE 审中-公开

    公开(公告)号：US20190055358A1

    公开(公告)日：2019-02-21

    申请号：US16074915

    申请日：2017-03-24

    申请人： Kureha Corporation

    发明人： Akihiro KONNO ,  Hiroyuki SATO

    IPC分类号： C08G75/0209 ,  C08G75/0263 ,  C08G75/0254

    摘要： The present invention provides a method for producing granular polyarylene sulfide (PAS) with increased average particle size and enhanced particle strength, a method for increasing the average particle size of granular PAS, a method for enhancing the particle strength of granular PAS, and granular PAS. The method for producing PAS according to the present invention includes: step 1: a preparation step of preparing a mixture containing an organic amide solvent, a sulfur source, water, a dihalo aromatic compound, and an alkali metal hydroxide; step 2: a pre-stage polymerization step of initiating a polymerization reaction by heating the mixture to produce a prepolymer having a dihalo aromatic compound conversion ratio of not less than 50% in the presence of less than an equimolar amount of an alkali metal hydroxide per 1 mol of the sulfur source; step 3: a post-stage polymerization step of continuing the polymerization reaction in the presence of not less than an equimolar amount of an alkali metal hydroxide per 1 mol of the sulfur source to obtain a reaction product mixture; and step 4: a cooling step of cooling the reaction product mixture after the post-stage polymerization step; wherein step 4 is performed in the presence of at least one type of auxiliary agent such as a carboxylate.