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公开(公告)号：US09580517B2
公开(公告)日：2017-02-28
申请号：US14781322
申请日：2014-05-28
Applicant: Dow Global Technologies LLC
Inventor： Alexandra Hild , Hans-Juergen Juhl , Roland Adden
Abstract: Prepare lithium carboxymethyl cellulose by treating sodium carboxymethyl cellulose with a weak acid to form an acid from of carboxymethyl cellulose and then treating the acid form of the carboxymethyl cellulose with lithium chloride.
Abstract translation: 通过用弱酸处理羧甲基纤维素钠，由羧甲基纤维素形成酸，然后用氯化锂处理酸形式的羧甲基纤维素，制备羧甲基纤维素钠。
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公开(公告)号：US20220112311A1
公开(公告)日：2022-04-14
申请号：US17428649
申请日：2020-04-17
Applicant: Dow Global Technologies LLC
Inventor： Alexandra Hild , Jöerg Neubauer , Sonja Menz
Abstract: A process for producing a crosslinked cellulose ether including the steps of: (a) contacting at least one cellulose material with at least one alkalization reagent to form an activated cellulose material; (b) contacting the activated cellulose material of step (a) with at least one etherification reagent to form an uncrosslinked cellulose ether; (c) subjecting the cellulose ether of step (b) to a simultaneous or stepwise washing and/or granulating step; (d) adding at least one crosslinking agent to the uncrosslinked cellulose ether during the washing and/or granulating of step (c) to form a crosslinked cellulose ether; and (e) any other optional components desired; and a crosslinked cellulose ether produced by the above process.
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公开(公告)号：US20170306102A1
公开(公告)日：2017-10-26
申请号：US15632451
申请日：2017-06-26
Applicant: Dow Global Technologies LLC
Inventor： Bettina Hoelzer , Alexandra Hild , Jorg Theuerkauf , Juergen Hermanns
IPC: C08J3/03 , C08L1/28 , C09D101/28
CPC classification number: C08J3/03 , B01J13/04 , C08J2301/28 , C08L1/08 , C08L1/284 , C09D101/08 , C09D101/284
Abstract: A mixture of a cellulose derivative and a liquid diluent is prepared which comprises at least 5 weight percent of the cellulose derivative, based on the total weight of the cellulose derivative and the liquid diluent. The mixing operating causes air to be entrapped in the mixture. The time for at least partially removing entrapped air is reduced by providing a cellulose derivative having a specific surface area of less than 0.20 m2/g measured by BET method for preparing the mixture.
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公开(公告)号：US20160102153A1
公开(公告)日：2016-04-14
申请号：US14781322
申请日：2014-05-28
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： Alexandra Hild , Hans-Juergen Juhl , Roland Adden
IPC: C08B11/12
Abstract: Prepare lithium carboxymethyl cellulose by treating sodium carboxymethyl cellulose with a weak acid to form an acid from of carboxymethyl cellulose and then treating the acid form of the carboxymethyl cellulose with lithium chloride.
Abstract translation: 通过用弱酸处理羧甲基纤维素钠，由羧甲基纤维素形成酸，然后用氯化锂处理酸形式的羧甲基纤维素，制备羧甲基纤维素钠。
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公开(公告)号：US12110254B2
公开(公告)日：2024-10-08
申请号：US17298709
申请日：2020-02-06
Applicant: Dow Global Technologies LLC
Inventor： Robert Baumann , Jörn Breckwoldt , Alexandra Hild , Marc Schmitz
IPC: C04B24/38 , C04B28/04 , C04B111/34
CPC classification number: C04B24/383 , C04B28/04 , C04B2111/343
Abstract: A concrete-forming composition for producing a concrete article including: (a) at least one internal curing agent including a water-insoluble crosslinked cellulose ether wherein the water-insoluble crosslinked cellulose ether has a higher water adsorption capacity compared to typically used superabsorbent polymers and wherein the water-insoluble crosslinked cellulose ether can be successfully and efficiently used as a water-insoluble crosslinked cellulose either internal curing agent in concrete-forming compositions; and (b) a cementitious material; a process for making the above concrete-forming composition; and a concrete article made from the above concrete-forming composition with the objective of reducing autogenous shrinkage and crack formation in the resulting concrete article made from the above concrete-forming composition.
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Patent Agency Ranking
公开(公告)号：US20240099956A1
公开(公告)日：2024-03-28
申请号：US18259807
申请日：2022-02-22
Inventor： German Parada , Lyndsay M. Leal , Alexandra Hild , Jörg Neubauer , Bethany K. Johnson
Abstract: An aqueous personal care rinse off composition is provided, comprising: a dermatologically acceptable aqueous vehicle; a dermatologically acceptable cleaning surfactant; and a suds enhancing structurant; wherein the suds enhancing structurant comprises a crosslinked cellulose ether containing 0.1 to 1.0 wt %, based on weight of the crosslinked cellulose ether, of polyether groups.
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公开(公告)号：US10150704B2
公开(公告)日：2018-12-11
申请号：US15567210
申请日：2016-06-29
Applicant: DOW GLOBAL TECHNOLOGIES LLC
Inventor： Alexandra Hild , Joerg Neubauer , Joern Breckwoldt
Abstract: The present invention provides cementitious tile adhesives comprising ordinary Portland cement, sand or another inorganic filler, and from 0.12 to 0.6 wt. % of total solids of one or more polyether group containing crosslinked cellulose ethers. The present invention also provides methods of making the polyether group containing crosslinked cellulose ethers comprising crosslinking a cellulose ether at 90° C. or less, in an inert atmosphere, e.g. nitrogen, in the presence of a polyether group containing crosslinking agent and in the presence of alkali; the process may comprise part of a stepwise addition process of making of a cellulose ether itself in which the crosslinking of the cellulose ethers precedes at least one addition of alkyl halide or alkylene oxide to form, respectively, alkyl or hydroxyalkyl groups on the cellulose.
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公开(公告)号：US20170369763A1
公开(公告)日：2017-12-28
申请号：US15532214
申请日：2016-01-11
Applicant: Dow Global Technologies LLC
Inventor： Pramod D. Patil , Alexandra Hild
CPC classification number: C09K8/487 , C04B24/383 , C04B28/02 , C09K8/493
Abstract: Disclosed is an aqueous cementing slurry composition and a method of use thereof for cementing a pipe or casing in a borehole of a well using an aqueous cementing slurry composition comprising (a) a hydraulic cement, (b) a methylhydroxyethyl cellulose (HEMC) having an ethylene oxide molar substitution (EO MS) of from 0.16 to 0.22 and a methyl degree of substitution (M DS) of from 1.35 to 1.45, (c) water, and optionally (d) one or more other additives conventionally added to aqueous cementing compositions useful in cementing casings in the borehole of wells. Preferably, the aqueous cementing slurry composition is pumped downwardly into said casing, pumped upwardly into the annulus surrounding said casing until said aqueous composition fills that portion of the annular space desired to be sealed, and then maintaining said aqueous cementing composition in place until the cement sets.
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公开(公告)号：US12291582B2
公开(公告)日：2025-05-06
申请号：US17310470
申请日：2020-04-17
Applicant: Dow Global Technologies LLC
Inventor： Alexandra Hild , Jöerg Neubauer , Sonja Menz , Matthias Sprehe , Michael Schreck
Abstract: A process for producing a crosslinked cellulose ether including the steps of (i) contacting at least one cellulose material with a mixture comprising (ia) at least one crosslinking agent and (ib) at least one alkalization reagent to form an activated cellulose material; and (ii) contacting the activated cellulose material of step (i) with at least one etherification reagent; wherein the at least one etherification reagent reacts with the activated cellulose material to form the crosslinked cellulose ether; and a crosslinked cellulose ether produced by the above process.
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10.发明公开公开(公告)号：US20240317643A1
公开(公告)日：2024-09-26
申请号：US18546987
申请日：2022-05-02
Applicant: Dow Global Technologies LLC
Inventor： Alexandra Hild , Jörn Breckwoldt
IPC: C04B14/06 , C04B7/02 , C04B24/38 , C04B28/04 , C04B111/00
CPC classification number: C04B14/06 , C04B7/02 , C04B24/386 , C04B28/04 , C04B2111/00646
Abstract: The present invention provides dry mix compositions for cement-based tile adhesives having both improved open time and slip resistance comprising one or more gel-like crosslinked cellulose ethers containing polyether groups, preferably, a mixed cellulose ether having polyoxypropylene dioxyethylene ether crosslinks. The gel-like water-soluble crosslinked cellulose ethers containing polyether groups of the present invention are formed from low to medium viscosity cellulose ethers and contain polyether groups having from 2 to 15, or, preferably, 13 or fewer oxyalkylene groups, or, preferably, 7 or more oxyalkylene groups. The present invention also provides methods of using the dry mixes in cement-based tile adhesives.
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