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    • 21. 发明授权
    • Ultra high molecular weight polyethylene fractions having narrow molecular weight distributions and methods of making and using the same
    • 具有窄分子量分布的超高分子量聚乙烯级分及其制备和使用方法
    • US07691633B2
    • 2010-04-06
    • US11766518
    • 2007-06-21
    • Chung C. TsoMelvin HildebrandPaul J. DesLauriersYoulu Yu
    • Chung C. TsoMelvin HildebrandPaul J. DesLauriersYoulu Yu
    • C08F210/02G01N30/02C08F6/12
    • C08F6/04C08F110/02Y10T436/10C08L23/04C08F2500/01C08F2500/03
    • Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.
    • 可以制备聚合物级分,例如具有小于约2.3的PDI和大于约1,000,000g / mol的Mw,3,000,000g / mol或6,000,000g / mol的聚乙烯级分。 通过首先将母体聚合物溶解在相对良好的溶剂中,将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分,从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。
    • 22. 发明授权
    • Process for sulfur-containing derivatives of hydroxyphenylbenzotriazoles
    • 羟苯基苯并三唑的含硫衍生物的方法
    • US5410071A
    • 1995-04-25
    • US197905
    • 1994-02-17
    • Paul J. DesLauriersParitosh K. DasDarryl R. Fahey
    • Paul J. DesLauriersParitosh K. DasDarryl R. Fahey
    • C07D249/20C08G75/02C08G85/00C08K5/378
    • C08K5/378C07D249/20C08G75/0204C08G85/00
    • A composition that, when present in a polymer matrix, reduces the deleterious effect of UV light absorption by the polymer is provided, which comprises a sulfur-containing derivative of hydroxyphenylbenzotriazole having the formula of: ##STR1## wherein each X is selected from the group consisting of hydrogen, halogens, cyano, alkyl, phenyl group, biphenyl group, arylthio, amine, ketone, aldehyde, alkoxy, hydroxy, carboxylic acid group, oligomer and combinations thereof and can have carbon atoms up to about 20; n is a whole number from 1 to 5; n' is a whole number from 0 to 4; n" is a whole number from 1 to 2 and each n" can be the same or different; q is an integer from 1 to 10; each Y is selected from the group consisting of --S(O)(O)--, --S(O)--, and --S--; each R can be selected from the group consisting of hydrogen, alkyl group, alkenyl group, aralkyl group, alkaryl group, and combinations thereof and can have 0 to about 10 carbon atoms; each OH group can be at either the 2'- or the 6'-position, or both. Also provided are a composition comprising the sulfur-containing derivative, a process for preparing the derivative, a composition comprising a polymer chemically bonded to the derivative, and a process for preparing the composition which comprises a polymer chemically bonded to the derivative.
    • 当存在于聚合物基质中时,提供降低由聚合物引起的UV光吸收的有害影响的组合物,其包含具有下式的羟基苯基苯并三唑的含硫衍生物:其中每个X选自 由氢,卤素,氰基,烷基,苯基,联苯基,芳硫基,胺,酮,醛,烷氧基,羟基,羧酸基,低聚物及其组合组成,可以具有高达约20的碳原子; n为1〜5的整数; n'是从0到4的整数; n“是从1到2的整数,并且每个n”可以相同或不同; q是1至10的整数; 每个Y选自-S(O)(O) - , - S(O) - 和-S-; 每个R可以选自氢,烷基,烯基,芳烷基,烷芳基及其组合,并且可以具有0至约10个碳原子; 每个OH基团可以在2'-或6'-位,或两者。 还提供了包含含硫衍生物的组合物,制备衍生物的方法,包含与衍生物化学键合的聚合物的组合物,以及包含与衍生物化学键合的聚合物的组合物的方法。
    • 25. 发明授权
    • Measurement of short chain branching in olefin copolymers using chemometric analysis
    • 使用化学计量分析测量烯烃共聚物中的短链支化
    • US07056744B2
    • 2006-06-06
    • US10463849
    • 2003-06-16
    • Paul J. DesLauriersDavid C. RohlfingAlan D. EastmanEric T. Hsieh
    • Paul J. DesLauriersDavid C. RohlfingAlan D. EastmanEric T. Hsieh
    • G01N33/44G01N21/00
    • G01N21/359G01N21/3577G01N2021/3595Y10T436/21
    • A method of determining the proportion of short-chain branching in an olefin copolymer process stream is disclosed. The short-chain branching may also be determined as a function of molecular weight in a sample having a range of molecular weights. In the method, at least two olefin copolymer training samples are provided. The respective samples have different, known proportions of short-chain branching. The infrared (e.g. FT-IR) absorbance spectra of the training samples in a wavenumber range are obtained. Calibration information is determined from the training samples by chemometrically correlating the differences in the infrared absorbance spectra of the training samples to the differences in the degree of short-chain branching in the training samples. This step generates calibration information that allows the degree of short-chain branching in a sample to be determined once its infrared absorbance spectrum is obtained. A method for determining the statistical error in the measurement of short-chain branching in an olefin polymer sample as a function of its molecular weight distribution is also disclosed.
    • 公开了一种确定烯烃共聚物工艺流中短链支化比例的方法。 短链支化也可以在具有分子量范围的样品中作为分子量的函数来确定。 在该方法中,提供至少两种烯烃共聚物训练样品。 各样品具有不同的已知比例的短链支化。 获得波数范围内训练样本的红外(例如FT-IR)吸收光谱。 通过化学方法将训练样本的红外吸收光谱的差异与训练样本中短链分支程度的差异化学相关,从训练样本中确定校准信息。 该步骤产生校准信息,其允许在获得样品的红链吸收光谱后测定样品中的短链支化度。 还公开了用于确定烯烃聚合物样品中短链支化的测量中的统计误差作为其分子量分布的函数的方法。
    • 26. 发明授权
    • Measurement of short chain branching in olefin copolymers using chemometric analysis
    • 使用化学计量分析测量烯烃共聚物中的短链支化
    • US06632680B1
    • 2003-10-14
    • US09667657
    • 2000-09-22
    • Paul J. DesLauriersDavid C. RohlfingAlan D. EastmanEric T. Hsieh
    • Paul J. DesLauriersDavid C. RohlfingAlan D. EastmanEric T. Hsieh
    • G01N3344
    • G01N21/359G01N21/3577G01N2021/3595Y10T436/21
    • A method of determining the proportion of short-chain branching in an olefin copolymer process stream is disclosed. The short-chain branching may also be determined as a function of molecular weight in a sample having a range of molecular weights. In the method, at least two olefin copolymer training samples are provided. The respective samples have different, known proportions of short-chain branching. The infrared (e.g. FT-IR) absorbance spectra of the training samples in a wavenumber range are obtained. Calibration information is determined from the training samples by chemometrically correlating the differences in the infrared absorbance spectra of the training samples to the differences in the degree of short-chain branching in the training samples. This step generates calibration information that allows the degree of short-chain branching in a sample to be determined once its infrared absorbance spectrum is obtained. A method for determining the statistical error in the measurement of short-chain branching in an olefin polymer sample as a function of its molecular weight distribution is also disclosed.
    • 公开了一种确定烯烃共聚物工艺流中短链支化比例的方法。 短链支化也可以在具有分子量范围的样品中作为分子量的函数来确定。 在该方法中,提供至少两种烯烃共聚物训练样品。 各样品具有不同的已知比例的短链支化。 获得波数范围内训练样本的红外(例如FT-IR)吸收光谱。 通过化学方法将训练样本的红外吸收光谱的差异与训练样本中短链分支程度的差异化学相关,从训练样本中确定校准信息。 该步骤产生校准信息,其允许在获得样品的红链吸收光谱后测定样品中的短链支化度。 还公开了用于确定烯烃聚合物样品中短链支化测量中的统计误差作为其分子量分布函数的方法。
    • 28. 发明授权
    • Co-production of an alkenyl aromatic compound or precursor thereof and
an oxygenated sulfur-containing compound
    • 联合生产烯基芳族化合物或其前体和含氧化合物
    • US5446227A
    • 1995-08-29
    • US128498
    • 1993-09-07
    • Paul J. DesLauriersMichael S. Matson
    • Paul J. DesLauriersMichael S. Matson
    • C07C1/20C07C15/40C07C315/02C07C409/08C07C1/00
    • C07C409/08C07C1/20C07C15/40C07C315/02C07C407/00
    • A process for co-production of an alkenyl aromatic compound such as, for example, styrene and t-butylstyrene, and an oxygenated sulfur-containing compound such as, for example, a sulfoxide or a sulfone is disclosed which comprises: (1) contacting, in the presence or absence of a catalyst, an .alpha.-methyl benzylic hydroperoxide with an organic sulfide compound to produce a mixture of an .alpha.-methyl benzylic hydroxide and an oxygenated sulfur-containing compound; (2) separating the .alpha.-methyl benzylic hydroxide from the sulfur-containing compound; (3) contacting the .alpha.-methyl benzylic hydroxide with a base to convert the .alpha.-methyl benzylic hydroxide to the alkenyl aromatic compound; and optionally, (4) recovering the alkenyl aromatic compound from the oxygenated sulfur-containing compound. The sulfoxide produced can be oxidized to a sulfone. The contacting of the .alpha.-methyl benzylic hydroxide with a base can also be carried out before the .alpha.-methyl benzylic hydroxide is separated from the oxygenated sulfur-containing compound followed by separation of the sulfur-containing compound.
    • 公开了一种共同制备链烯基芳族化合物如苯乙烯和叔丁基苯乙烯的方法和含氧化的含硫化合物,例如亚砜​​或砜,其包括:(1)接触 在存在或不存在催化剂的情况下,将α-甲基苄基氢过氧化物与有机硫化物混合以产生α-甲基苄基氢氧化物和含氧的含硫化合物的混合物; (2)从含硫化合物中分离α-甲基苄基氢氧化物; (3)使α-甲基苄基氢氧化物与碱反应以将α-甲基苄基氢氧化物转化为链烯基芳族化合物; 和(4)从含氧化合物中回收链烯基芳族化合物。 所生成的亚砜可以被氧化成砜。 α-甲基苄基氢氧化物与碱的接触也可以在将α-甲基苄基氢氧化物与含氧的含硫化合物分离,然后分离含硫化合物之前进行。