MX379749B - Aditivos para mejorar las caracteristicas de tiempo abierto y congelamiento-descongelamiento de pinturas y recubrimientos a base de agua. - Google Patents

Aditivos para mejorar las caracteristicas de tiempo abierto y congelamiento-descongelamiento de pinturas y recubrimientos a base de agua.

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Publication number
MX379749B
MX379749B MX2014010855A MX2014010855A MX379749B MX 379749 B MX379749 B MX 379749B MX 2014010855 A MX2014010855 A MX 2014010855A MX 2014010855 A MX2014010855 A MX 2014010855A MX 379749 B MX379749 B MX 379749B
Authority
MX
Mexico
Prior art keywords
coating
coatings
additives
open time
binders
Prior art date
Application number
MX2014010855A
Other languages
English (en)
Other versions
MX2014010855A (es
Inventor
Jr Calvin M Wicker
Jr Charles F Palmer
Ii Lester A Haney
Original Assignee
Ethox Chemicals Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ethox Chemicals Llc filed Critical Ethox Chemicals Llc
Publication of MX2014010855A publication Critical patent/MX2014010855A/es
Publication of MX379749B publication Critical patent/MX379749B/es

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C305/00—Esters of sulfuric acids
    • C07C305/02—Esters of sulfuric acids having oxygen atoms of sulfate groups bound to acyclic carbon atoms of a carbon skeleton
    • C07C305/04—Esters of sulfuric acids having oxygen atoms of sulfate groups bound to acyclic carbon atoms of a carbon skeleton being acyclic and saturated
    • C07C305/10—Esters of sulfuric acids having oxygen atoms of sulfate groups bound to acyclic carbon atoms of a carbon skeleton being acyclic and saturated being further substituted by singly-bound oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C43/00—Ethers; Compounds having groups, groups or groups
    • C07C43/02—Ethers
    • C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
    • C07C43/14—Unsaturated ethers
    • C07C43/164—Unsaturated ethers containing six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
    • C07C59/40—Unsaturated compounds
    • C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
    • C07C59/64—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings
    • C07C59/66—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings
    • C07C59/68—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings the oxygen atom of the ether group being bound to a non-condensed six-membered aromatic ring
    • C07C59/70—Ethers of hydroxy-acetic acid, e.g. substitutes on the ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02—Phosphorus compounds
    • C07F9/06—Phosphorus compounds without P—C bonds
    • C07F9/08—Esters of oxyacids of phosphorus
    • C07F9/09—Esters of phosphoric acids
    • C07F9/11—Esters of phosphoric acids with hydroxyalkyl compounds without further substituents on alkyl
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
    • C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
    • C08G65/14—Unsaturated oxiranes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
    • C08G65/22—Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
    • C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
    • C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
    • C08G65/2612—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups containing aromatic or arylaliphatic hydroxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/321—Polymers modified by chemical after-treatment with inorganic compounds
    • C08G65/326—Polymers modified by chemical after-treatment with inorganic compounds containing sulfur
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
    • C08G65/331—Polymers modified by chemical after-treatment with organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/41—Compounds containing sulfur bound to oxygen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D171/02—Polyalkylene oxides

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Paints Or Removers (AREA)

Abstract

La presente invención se refiere a recubrimientos a base de agua que tienen un equilibrio aceptable de propiedades tanto durante el almacenamiento del recubrimiento, aplicación y secado. El periodo en el cual las irregularidades en un recubrimiento recientemente aplicado pueden ser reparadas sin resultar en marcas de brocha, se refiere como el tiempo abierto. Los recubrimientos acuosos en general emplean polímeros de alto peso molecular dispersos como aglutinantes. Estos aglutinantes a menudo proporcionan tiempo abiertos cortos cuando el recubrimiento es secado, puesto que las partículas poliméricas dispersadas tienden a ser inmovilizadas rápidamente en la región de borde de un recubrimiento aplicado. Como un resultado, la viscosidad del recubrimiento se incrementa rápidamente, lo cual conduce a una ventana limitada de capacidad de trabajo. La presente invención proporciona aditivos que no son volátiles pero que extenderán el tiempo en que la película es maleable después que es aplicada sin interferir con otros atributos, tales como la resistencia del recubrimiento al congelamiento mientras está en la lata previo a la aplicación.
MX2014010855A 2012-03-10 2013-03-10 Aditivos para mejorar las caracteristicas de tiempo abierto y congelamiento-descongelamiento de pinturas y recubrimientos a base de agua. MX379749B (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261609269P 2012-03-10 2012-03-10
PCT/US2013/030094 WO2013138209A1 (en) 2012-03-10 2013-03-10 Additives to improve open-time and freeze-thaw characteristics of water-based paints and coatings
US13/792,175 US9309376B2 (en) 2012-03-10 2013-03-10 Additives to improve open-time and freeze-thaw characteristics of water-based paints and coatings

Publications (2)

Publication Number Publication Date
MX2014010855A MX2014010855A (es) 2015-08-10
MX379749B true MX379749B (es) 2025-03-11

Family

ID=49161683

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2014010855A MX379749B (es) 2012-03-10 2013-03-10 Aditivos para mejorar las caracteristicas de tiempo abierto y congelamiento-descongelamiento de pinturas y recubrimientos a base de agua.

Country Status (5)

Country Link
US (1) US9309376B2 (es)
BR (1) BR112014022305B1 (es)
CA (1) CA2866747C (es)
MX (1) MX379749B (es)
WO (1) WO2013138209A1 (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10196537B2 (en) 2013-03-15 2019-02-05 The Sherwin-Williams Company Dirt pick-up resistant composition
EP2970697B1 (en) 2013-03-15 2022-10-05 Swimc Llc Water-based compositions that resist dirt pick-up
US10221322B2 (en) 2013-03-15 2019-03-05 The Sherwin-Williams Company Dirt pick-up resistant composition
US9371435B2 (en) * 2013-04-22 2016-06-21 Ethox Chemicals, Llc Additives to resin compositions for improved impact strength and flexibility
CN106687536A (zh) 2014-09-12 2017-05-17 威士伯采购公司 耐沾污性的水基涂料组合物
KR102588183B1 (ko) 2015-04-01 2023-10-13 에스더블유아이엠씨 엘엘씨 안료 분산물
CA2960100C (en) 2016-03-28 2025-10-14 Dow Global Technologies Llc AQUEOUS COMPOSITIONS CONTAINING POLYALCOXYLATE SALTS INTENDED FOR IMPROVING OPEN TIME
JP6985285B2 (ja) 2016-03-28 2021-12-22 ダウ グローバル テクノロジーズ エルエルシー 組成物、水性コーティング組成物、及び水性コーティング組成物の凍結／融解安定性を改善する方法
CA2960249A1 (en) 2016-03-28 2017-09-28 Dow Global Technologies Llc Aqueous compositions having polyalkoxylates for improved open time
US20190203059A1 (en) * 2016-05-19 2019-07-04 Obschestvo S Ogranichennoi Otvetstvennostyu "Intekhenergo" Enclosure Structure Device for Process Furnaces
US10465611B2 (en) 2016-09-15 2019-11-05 Pratt & Whitney Canada Corp. Reverse flow multi-spool gas turbine engine with aft-end accessory gearbox drivingly connected to both high pressure spool and low pressure spool
MX2020002299A (es) 2017-08-29 2020-09-10 Armstrong World Ind Inc Recubrimientos con alto contenido de sólidos para paneles de construcción.
EP3676024A4 (en) 2017-08-29 2021-07-28 Armstrong World Industries, Inc. HIGH SOLID COATINGS FOR CONSTRUCTION PANELS
CA3101450A1 (en) 2018-05-29 2019-12-05 Swimc Llc Water-based compositions with long term gloss retention
CN112752743A (zh) * 2018-08-30 2021-05-04 罗地亚经营管理公司 涂料中的取代的邻苯二酚添加剂和使用方法
CN112912448A (zh) * 2018-08-30 2021-06-04 罗地亚经营管理公司 取代的邻苯二酚聚合物分散剂
CN112771018A (zh) * 2018-08-30 2021-05-07 罗地亚经营管理公司 取代的邻苯二酚单体、共聚物和使用方法
AU2020269271A1 (en) * 2019-05-03 2021-11-25 Specialty Operations France Polymerizable surfactants having water whitening resistance and methods for use

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL128245C (es) * 1951-05-31
GB2054554B (en) * 1979-07-24 1983-08-03 Yorkshire Chemicals Ltd Additives for tin-plating baths
JPS6017091A (ja) * 1983-07-06 1985-01-28 Dai Ichi Kogyo Seiyaku Co Ltd 酸性亜鉛メツキ浴添加剤
JPS6173896A (ja) * 1984-09-18 1986-04-16 Nippon Steel Corp 酸性錫メツキ浴用添加剤
US4814514A (en) * 1986-05-07 1989-03-21 Dai-Ichi Kogyo Seiyaku Co., Ltd. Surface active compounds having a polymerizable moiety
US4936965A (en) * 1988-10-17 1990-06-26 Nkk Corporation Method for continuously electro-tinplating metallic material
GB9300056D0 (en) * 1992-02-11 1993-03-03 Zeneca Ltd Dispersion
CN101778909A (zh) * 2007-08-03 2010-07-14 巴斯夫欧洲公司 形成有机颜料的方法
US9388323B2 (en) * 2008-01-18 2016-07-12 Rhodia Operations Latex binders, aqueous coatings and paints having freeze-thaw ability and methods for using same

Also Published As

Publication number Publication date
WO2013138209A1 (en) 2013-09-19
US9309376B2 (en) 2016-04-12
BR112014022305B1 (pt) 2021-01-26
US20140256862A1 (en) 2014-09-11
CA2866747A1 (en) 2013-09-19
CA2866747C (en) 2020-09-22
MX2014010855A (es) 2015-08-10

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