Patents Assigned to Celanese Emulsions GmbH
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Patent number: 9593180Abstract: The invention relates to novel cross-linkable monomers that may be polymerized with ethylenically unsaturated comonomers to form cross-linkable copolymers. Said copolymers may particularly be used in the form of aqueous dispersions as formaldehyde-free adhesives or as coatings with good water resistance.Type: GrantFiled: April 30, 2014Date of Patent: March 14, 2017Assignee: Celanese Emulsions GmbHInventors: Martin Jakob, Stefan Nogai
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Publication number: 20160115649Abstract: A paper product comprising a planar fibrous cellulose substrate, and a coating composition disposed on a surface of said substrate comprising an interpolymer prepared by the emulsion polymerization of (i) one or more vinyl ester monomers; (ii) ethylene; (iii) an unsaturated silane co-monomer; and (iv) one or more emulsion-stabilizing ionic co-monomers comprising one or more of unsaturated, substituted sulfonic acid, one or more of an unsaturated phosphonic acid, or an ester of one of those acids, in the presence of (v) a stabilizing system which comprises one or more anionic and/or nonionic surfactants but less than about 1 pphm of any protective colloid material; and (v) water.Type: ApplicationFiled: September 10, 2012Publication date: April 28, 2016Applicant: CELANESE EMULSIONS GMBHInventors: Yifang SHI, Rajeev FARWAHA, Yunlong ZHANG, Yi HAN, Hendrikus van BOXTEL, Gerhard BAUER, Joerg SCHULTE
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Patent number: 9249278Abstract: Compositions containing an aqueous dispersion of selected polymers and selected polyaldehydes as crosslinking agents are described. Adhesives having very high resistance to boiling water can be produced from these formulations.Type: GrantFiled: February 13, 2008Date of Patent: February 2, 2016Assignees: Celanese Emulsions Gmbh, Oxea Deutschland GmbHInventors: Christoph Balzarek, Martin Jakob
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Patent number: 9175185Abstract: What are described are coating compositions comprising pigments and/or fillers and multistage polyvinyl ester dispersions as binders. These binders are produced by a selected multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form or in the form of an emulsion are added to the reaction mixture in a second stage and then the polymerization is started again. The polyvinyl ester dispersions comprise polymerized silanes and/or epoxides or the polyvinyl ester dispersions have only a small content of protective colloids, if any. The coating compositions formulated with the multistage polyvinyl ester dispersions obtained in this way are notable for a very high weathering resistance.Type: GrantFiled: July 15, 2008Date of Patent: November 3, 2015Assignee: Celanese Emulsions GmbHInventors: Thomas Fichtner, Harald Petri, Stephan Krieger, Ivan Cabrera
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Publication number: 20150247054Abstract: A copolymer dispersion is described comprising a copolymer derived from a monomer mixture comprising: (a) 88.5 to 94% by weight of at least one vinyl ester of a saturated carboxylic acid; (b) 5 to 10.5% by weight of ethylene; (c) 0.5 to 5% by weight of at least one ethylenically unsaturated acid and/or an anhydride thereof and/or a salt thereof; and (d) 0.5 to 5% by weight of at least one ethylenically unsaturated monomer having at least one crosslinkable functional unit. The weight ratio of vinylester units to ethylene units in the copolymer is between 89:11 and 94:6 and the dispersion is stabilized with at least 1% by weight of an emulsifier, wherein the amounts of monomers and emulsifier refer to the total amount of monomers in the copolymer.Type: ApplicationFiled: December 16, 2011Publication date: September 3, 2015Applicant: CELANESE EMULSIONS GMBHInventors: Stefan Nogai, Alistair McLennan
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Publication number: 20150184015Abstract: A coating composition comprises an emulsion copolymer of a monomer mixture comprising at least one vinyl ester, ethylene, and a stabilizing system. The stabilizing system comprises at least one polyvinyl alcohol. The monomer mixture comprises from 60 to 82 wt % of the at least one vinyl ester and from 18 to 40 wt % of the ethylene based on the total weight of monomers in the mixture. The stabilizing system comprises from 1 to 5 wt % of at least one medium molecular weight polyvinyl alcohol and at least one low molecular weight polyvinyl alcohol. The emulsion copolymer has a solids content from 50% to 60% and a viscosity ranges from 500 to 6,000 mPa·s. and a formaldehyde content of less than 10 ppm as determined by HPLC.Type: ApplicationFiled: August 10, 2012Publication date: July 2, 2015Applicant: Celanese Emulsions GmbHInventors: Alistair Mclennan, Linlin Miao
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Publication number: 20150141553Abstract: A vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising at least one vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol and a free radical redox polymerization initiator system comprising i-butyl hydroperoxide as an oxidizing agent and at least one of a sulfuric acid-based compound and erythorbic acid or a salt thereof as a reducing agent. The monomer mixture comprises from 70 wt % to 95 wt % of said at least one vinyl ester and from 5 wt % to 30 wt % of ethylene based on the total weight of monomers in said mixture and the copolymer has a formaldehyde content of less than 5.0 ppmw as determined by ISO-15173.Type: ApplicationFiled: April 25, 2012Publication date: May 21, 2015Applicant: CELANESE EMULSIONS GMBHInventors: Alistair Mclennan, Hendrikus C.M. Van Boxtel
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Emulsion polymers with improved wet scrub resistance having one or more silicon containing compounds
Patent number: 9034944Abstract: Aqueous copolymer dispersions for a variety of uses, including coating compositions or binders for plasters and paints, are disclosed. The aqueous copolymer dispersions may comprise one or more silicon containing compounds, in particular hydrolyzable silane compounds without any additional reactive group.Type: GrantFiled: May 20, 2013Date of Patent: May 19, 2015Assignee: CELANESE EMULSIONS GMBHInventors: Stephan Krieger, Harald Petri, Kerstin Gohr, Lizandra Belmonte Rodrigues de Castro, Hendrikus van Boxtel -
Patent number: 9029454Abstract: An aqueous polymer composition is described comprising a homogeneous acrylic polymer dispersion produced by emulsion polymerization of a monomer mixture comprising: (A) from 85 to 99.9 wt % of one or more main monomers selected from C1-C12-alkyl esters of acrylic acid or C5-C12-alkyl esters of methacrylic acid, styrene, and vinyl toluene in such a ratio as to produce a polymer having a Tg in the range of ?20 to +65° C.; and (B) from 0.1 to 5 wt % of at least one stabilizing monomer selected from ethylenically unsaturated monocarboxylic acids or amides thereof, ethylenically unsaturated dicarboxylic acids or anhydrides or amides thereof, ethylenically unsaturated sulfonic acids, ethylenically unsaturated phosphoric acids, and ethylenically unsaturated phosphonic acids. The emulsion polymerization is conducted in the presence of 0.05 to 3 wt %, based on the total weight of monomers in the monomer mixture, of a chain transfer agent (C).Type: GrantFiled: January 14, 2013Date of Patent: May 12, 2015Assignee: Celanese Emulsions GmbHInventors: Christoph Deller, Argiri Tsami-Schulte, Stephan Krieger, Ulrich Desor, Marc Ratering
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Patent number: 9029469Abstract: A wood protection paint comprises a copolymer emulsion prepared by an emulsion polymerization process, in which a first monomer composition comprising from 60 weight percent to 95 weight percent of at least one vinyl ester, and from 5 weight percent to 40 weight percent ethylene is polymerized in a first stage under ethylene pressure to produce a first stage product having a Tg of less than 25° C. Then, in a second stage, a second monomer composition selected such that the polymer produced by the second monomer composition has a Tg of at least 95° C.Type: GrantFiled: May 31, 2013Date of Patent: May 12, 2015Assignee: Celanese Emulsions GmbHInventors: Lizandra Belmonte Rodrigues de Castro, Thomas Fichtner, Petra Klingel, Stephan Krieger
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Patent number: 9006329Abstract: An aqueous dispersion of a vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene and a polyvinyl alcohol stabilizing system consisting essentially of (a) about 0.5 to about 3 wt. % based on the total monomer weight of a first polyvinyl alcohol having a degree of hydrolysis of at least 98 mole % and (b) about 1 to about 4 wt. % based on the total monomer weight of a second polyvinyl alcohol having a degree of hydrolysis of about 85 to about 90 mole % and a weight average molecular weight of at least 85,000 g/mol.Type: GrantFiled: June 7, 2012Date of Patent: April 14, 2015Assignee: Celanese Emulsions GmbHInventors: Jörg Schulte, Alexander Madl, Hans Uwe Faust
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Patent number: 8993668Abstract: What are described are polyvinyl ester dispersions which are prepared in a multistage process and have a low content of polymerized acids or acid anhydrides. They can be obtained by a multistage process in which a polyvinyl ester dispersion is obtained in a first stage, monomers in dissolved or pure form are added to the reaction mixture in a second stage and then the polymerization is started again. The polymer dispersions obtained in this way are notable for a low coagulum content and for increased tensile strengths of the films formed therefrom.Type: GrantFiled: July 15, 2008Date of Patent: March 31, 2015Assignee: Celanese Emulsions GmbHInventor: Ivan Cabrera
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Publication number: 20150086746Abstract: Disclosed are aqueous compositions suitable for use as binders or adhesives in carpet products. Such compositions, prior to being applied to carpet substrates and cured, comprise vinyl ester/ethylene copolymer dispersions, along with other optional comonomers. The compositions are made by a continuous emulsion polymerisation that utilises a continuous loop reactor with a secondary line section. Carpet products which utilise such coating compositions to provide binder and/or adhesive layer within the carpet are also disclosed.Type: ApplicationFiled: May 15, 2013Publication date: March 26, 2015Applicant: CELANESE EMULSIONS GMBHInventors: Lizandra B.R. de Castro, David Adams
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Publication number: 20140350172Abstract: In a multi-stage emulsion polymerization process, a first monomer composition comprising from about 60 weight percent to about 95 weight percent of at least one vinyl ester, and from about 5 weight percent to about 40 weight percent ethylene is polymerized in a first stage under ethylene pressure to produce a first stage product having a Tg of less than 20° C. Then, in a second stage, a second monomer composition comprising at least 95 weight percent of a meth(acrylic)ester or a mixture of at least two different (meth)acrylic esters is polymerized in the presence of said first stage product, wherein the (meth)acrylic ester(s) is selected such that the polymer produced by said second monomer composition has a Tg of 5 to 90° C.Type: ApplicationFiled: December 19, 2012Publication date: November 27, 2014Applicant: CELANESE EMULSIONS GMBHInventors: Lizandra Belmonte Rodrigues De Castro, Thomas Fichtner, Kerstin Gohr, Stephan Krieger
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Publication number: 20140349060Abstract: Disclosed are aqueous carpet-coating compositions suitable for use as binders or adhesives in carpet products. Such compositions, prior to being applied to carpet substrates and cured, comprise: A) a selected type of vinyl acetate/ethylene (VAE) copolymer dispersion which has been stabilized with emulsifiers and a cellulose ether-based protective colloid, and B) at least one carbon black based filler in the form of a dispersion/slurry with a solids content between 20 and 70%. These coating compositions exhibit especially desirable initial viscosity and viscosity stability characteristics. Carpet products which utilize such coating compositions to provide binder and/or adhesive layer within the carpet are also disclosed. Such carpet products can have desirable odor-controlling and odor-absorbing properties.Type: ApplicationFiled: December 20, 2011Publication date: November 27, 2014Applicant: CELANESE EMULSIONS GmbHInventors: Harmin Mueller, Paul Stuart Wormald, Paolo Bavaj
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Publication number: 20140323655Abstract: A halogen-containing thermoplastic resin composition comprises (i) a halogen-containing thermoplastic resin; and (ii) a graft copolymer comprising (a) a first polymer produced by emulsion polymerization of at least one vinyl ester of a C1 to C20 carboxylic acid in the presence of a nonionic surfactant and (b) a second polymer having a glass transition temperature of at least 45° C. produced by emulsion polymerization of at least one monomer in the presence of the first polymer.Type: ApplicationFiled: April 28, 2014Publication date: October 30, 2014Applicant: CELANESE EMULSIONS GMBHInventors: Davide Brizzolara, Lars Koelling
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Publication number: 20140323608Abstract: A polymer dispersion comprises particles of a polymer composition formed at least partially by emulsion polymerization of first and second, simultaneously added, substantially styrene-free monomer feeds in the presence of an initiator in a reaction zone. The first monomer feed comprises monomers selected to produce a copolymer having a glass transition temperature less than or equal to about ?10° C., while the second monomer feed comprises monomers selected to produce a copolymer having a glass transition temperature greater than or equal to about 50° C. The relative rate of addition of the first and second monomer feeds into the reaction zone is continuously changed during at least part of the emulsion polymerization and the rate of addition of the initiator is changed step-wise at least once during the addition of the first and second monomer feeds.Type: ApplicationFiled: December 15, 2011Publication date: October 30, 2014Applicant: CELANESE EMULSIONS GmbHInventors: Christoph Deller, Ulrich Desor, Marc Ratering, Argiri Tsami-Schulte
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Publication number: 20140243468Abstract: The invention relates to novel cross-linkable monomers that may be polymerized with ethylenically unsaturated comonomers to form cross-linkable copolymers. Said copolymers may particularly be used in the form of aqueous dispersions as formaldehyde-free adhesives or as coatings with good water resistance.Type: ApplicationFiled: April 30, 2014Publication date: August 28, 2014Applicant: Celanese Emulsions GmbHInventors: Martin Jakob, Stefan Nogai
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Patent number: 8785540Abstract: A description is given of an aqueous vinyl ester copolymer dispersion stabilized with a combination of at least one protective colloid and of at least one emulsifier, said dispersion having a viscosity of less than 8000 mPa*s, a weight average dw of the particle sizes of 0.5 to 10 ?m, and a ratio of weight average to number average of the particle sizes, dw/dn, of at least 2.5, and the polymer possessing a glass transition temperature of between ?30 and +15° C. The dispersion can be used as an adhesive for nozzle application processes.Type: GrantFiled: August 7, 2007Date of Patent: July 22, 2014Assignee: Celanese Emulsions GmbHInventors: Harmin Müller, Hans Uwe Faust, Martin Schäfer
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Publication number: 20140171574Abstract: Disclosed are low-formaldehyde aqueous dispersions of vinyl ester/ethylene, e.g., vinyl acetate/ethylene (VAE), copolymers suitable for use in adhesives for applications such as tobacco or food products wherein only very low levels of formaldehyde are permitted. Such dispersions are prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol preferably having a degree of hydrolysis of at least 97 mole %, and a selected type of free radical redox polymerization initiator system. This selected redox initiator system comprises both a water-insoluble oxidizing agent and a sulfuric acid-based reducing agent. The monomer mixture which is polymerized is substantially free of co-monomers which yield free formaldehyde upon drying or curing of the dispersion and is also substantially free of ethylene oxide-containing emulsifiers.Type: ApplicationFiled: August 5, 2011Publication date: June 19, 2014Applicant: CELANESE EMULSIONS GMBHInventor: Alistair Mclennan