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METHOCEL™

Eficiente y Versátil: las caras gemelas de un líder del mercado

METHOCEL™ cellulose ethers include methylcellulose (MC) or hydroxypropyl methylcellulose (HPMC) polymers with solubilities ranging from water-soluble to organosoluble. METHOCEL ™ is an excellent rheology modifier, binder, film former, and water-retention agent. In addition, it has a few stand-out qualities. METHOCEL™ does not need hot water to dissolve; it is highly soluble in cold water. Therefore, energy can be conserved in dissolving the product. Another stand-out quality of METHOCEL™ is that once it is gelled by heat, it is able to revert back to liquid form when cooling. Many other thickeners do not have that flexibility.

Product Features

Genera una acción coloidal protectora y suspensión de polvos insolubles

Películas transparentes pueden encerrar la humedad y excluir contaminantes aceitosos

Actúa como ayuda al bombeo y como ayuda en la extrusión para varias pastas, por ejemplo, la cerámica

El perfil de dos soluciones de viscosidad y reología puede controlarse de manera precisa

Actúa como un surfactante en sistemas acuosos y proporciona emulsificación y estabilización de la fase

Puede volver a la forma de solución al enfriarse

No genera precipitaciones iónicas insolubles

Product Questions

  • Las SDS emitidas por DuPont en Europa cumplen con todos los requisitos legislativos europeos, incluidos los requisitos de REACH según la interpretación de la Comisión Europea.

    Debido a los desafíos prácticos de implementar los cambios en las SDS requeridos por REACH antes del inicio del proceso de registro, la Comisión Europea apoyó la posición del CEFIC con respecto a los siguientes puntos clave:

    • Los únicos requisitos que pueden implementarse razonablemente antes del 1.° de junio de 2007 fueron cambios de formato principalmente. (Estos incluyen revertir el contenido de las Secciones 2 y 3 e ingresar la dirección de correo electrónico del responsable de la creación de la SDS en la Sección 1 y para sustancias no clasificadas como peligrosas, agregar el motivo para indicar la sustancia en la Sección 3).
    • Las SDS que no sea necesario revisar por motivos distintos a los de cambios de formato mencionados anteriormente pueden conservarse en el formato anterior a REACH y se considera que continúan en conformidad porque su contenido es correcto. En el caso de SDS creadas recientemente y SDS revisadas, se deben implementar los cambios.
    • Todos los cambios solicitados por REACH, según lo descrito en los artículos 31 y Anexo II de la Normativa, deben implementarse antes del 1.° de diciembre de 2010, lo que coincide con la primera fecha límite para registrarse. Hasta esa fecha, las SDS que circulen en Europa tendrán 2 formatos diferentes.

    DuPont implementó las recomendaciones de la Comisión Europea mencionadas anteriormente. Sobre esta base, nuestras SDS cumplen los requisitos de REACH, según lo definido e interpretado actualmente por la Comisión Europea.

  • Todas las empresas de DuPont están comprometidas con mejorar el medio ambiente, la salud y la seguridad de nuestros trabajadores, nuestras operaciones, nuestros productos, el uso de nuestros productos por parte de nuestros clientes, así como las comunidades y los países donde realizamos la fabricación y comercialización. Declaración de políticas de EH&S de DuPont:

    En DuPont, proteger a las personas y el medio ambiente será parte de todo lo que hacemos y cada decisión que tomamos. Cada empleado tiene la responsabilidad de garantizar que nuestros productos y operaciones cumplan con los estándares gubernamentales o de Dow, lo que sea más estricto.

    Nuestro objetivo es eliminar todas las lesiones, evitar impactos ambientales y de salud adversos, reducir los desechos y emisiones y fomentar la conservación de recursos en cada estado del ciclo de vida útil de nuestros productos. Informaremos nuestro progreso y estaremos atentos al público.

    DuPont cumple con los requisitos de principios rectores, códigos y sistemas de gestión para Responsible Care® del American Chemistry Council. DuPont se ha comprometido una vez más a respaldar Responsible Care a escala global al firmar la Declaración global de Responsible Care bajo el auspicio del Consejo Internacional de Asociaciones Químicas (ICCA). DuPont también respalda la Estrategia global sobre productos del ICCA, un esfuerzo de la industria química mundial por seguir mejorando sus esfuerzos de administración de productos. Nuestro sistema de gestión de EH&S se somete a auditoría regularmente para garantizar el cumplimiento de todos los requisitos gubernamentales aplicables, los requisitos de Responsible Care, la norma ISO 14001 y los requisitos internos de DuPont. Vea los archivos adjuntos a continuación para conocer nuestro certificado corporativo de Responsible Care.

    DuPont adoptó lo que llamamos nuestras "Metas de sostenibilidad para 2025", ambiciosas metas de mejora del rendimiento con un amplio enfoque externo: fortalecer nuestras relaciones con las comunidades en las que operamos, continuar mejorando nuestra innovación y administración de productos y reducir nuestro impacto ambiental a nivel global. Para respaldar estas metas, DuPont trabaja continuamente para mejorar nuestro rendimiento a través de los programas específicos de EH&S como el programa La reducción de desechos siempre recompensa (WRAP). Puede encontrar más información en www.dow.com/sustainability/.

    En cuanto a la norma ISO 14001 específicamente, DuPont actualmente cuenta con 19 sitios a nivel mundial que están certificados con la norma ISO 14001. El resto de los más de 200 sitios actualmente no están buscando la certificación ISO 14001 de parte de un organismo externo. Sin embargo el Sistema de gestión de la disciplina operativa (ODMS) de DuPont es aplicable a nivel mundial y cumple con los requisitos establecidos por la norma ISO 14001 y Responsible Care®. Todos los sitios de Dow a nivel mundial han implementado o se encuentran en el proceso de implementación del Sistema de gestión ambiental de manera consistente con este Sistema de gestión global.

    ® Responsible Care es una marca registrada de servicio del American Chemistry Council

    Información adicional

    Certificados ISO 14001 para resinas DOWEX

    Certificados ISO 14001 para METHOCEL


    Archivos adjuntos

  • Certain types and grades of METHOCEL cellulose ethers are soluble in certain liquid polar organic reagents and mixtures of polar organic reagents and water. Therefore, METHOCEL products exhibit a useful and unique combination of polar organic solubility and water solubility. However, there is a key difference that one needs to understand. Although METHOCEL gums are well known to exhibit inverse solubility in water (they are insoluble in hot water but soluble in cool water), their solubility behavior in organic liquids reflects a normal expectation of increasing solubility with rising temperature. Also, see METHOCEL Solution Preparation.

    Generally, formulating METHOCEL products into a waterless (nonaqueous) system follows the same steps as for dissolution in water except for reversing the temperatures of the starting and finishing steps. The first step is dispersion of the polymer powder into the polar organic liquid. This is best accomplished by adding the METHOCEL™ into an organic liquid which is at a cool or room temperature (minimum solvency toward METHOCEL). Once the polymer is well dispersed (wetted out), the mixture should be stirred and heated until a solution forms. The solvency of the liquid organic reagent toward METHOCEL increases with increasing temperature (just the opposite of water solvency). Depending on the particular organic reagents, the mixture may or may not form clear solutions and may form a gel or precipitate upon cooling.

    Typical polar organic liquids that may function as solvents include many types of short, medium and long chain fatty acids, alcohols, esters and amides. Many flavor compounds are moderate or excellent solvents also. Many METHOCEL products are soluble in short chain hydroalcoholic solvent systems if the water content is greater than 10%. METHOCEL 311 shows the best solubility in short chain alcohol (methanol, ethanol, i-propanol) systems if the water is less than 10%. Generally, the hydroxypropyl methylcellulose types (METHOCEL 311, E, F, J and K) show greater solubility in polar organic liquids than methylcellulose (A and SG A) types.

  • The apparent viscosity of an aqueous solution of a METHOCEL cellulose ether is proportional to the molecular weight or chain length of the specific METHOCEL product used. Commercial designations of METHOCEL products are based on viscosity values determined in water at 20°C, with a concentration of 2% METHOCEL. The measurement methods used are described in the current ASTM monographs D1347 and D2363. The correlation between the number average molecular weight (Mn) and the commercial viscosity designation for METHOCEL A cellulose ethers is shown in the figure below.

    The table below provides further information regarding the correlation of number average molecular weight with the commercial viscosity designation. Intrinsic viscosity is the limiting quotient of the specific viscosity divided by the concentration as infinite dilution is approached (as the concentration approaches zero). The number average molecular weight (Mn) is calculated from the limiting osmotic pressure of the solvent as the concentration of the solute approaches zero. The average molecular weight (Mw) will be 3 to 10 times the Mn.

     

    Viscosity of Methylcellulose of Various Molecular Weights

    Viscosity grade
    2%, 20°C, mPas

    Intrinsic
    viscosity
    (h), dL/g

    Number average
    degreee of
    polymerization 

    Number average
    molecular
    weight (Mn)

    5
    10
    40
    100
    400
    1,500
    4,000
    8,000
    15,000
    19,000
    40,000
    75,000

    1.2
    1.4
    2.0
    2.6
    3.9
    5.7
    7.5
    9.3
    11.0
    12.0
    15.0
    18.4

    53
    70
    110
    140
    220
    340
    460
    580
    650
    750
    950
    1,160

    10,000
    13,000
    20,000
    26,000
    41,000
    63,000
    86,000
    110,000
    120,000
    140,000
    180,000
    220,000

     

  • The DuPont product name for USP Hypromellose is METHOCEL™ cellulose ether (K, F, or E type) Premium grade Hydroxypropyl Methylcellulose.  The substitution type is incorporated into the DuPont product name as shown in the table below.

      Dow Product Name

     USP Substitution Type

     Methoxy, %

    Hydroxypropoxy, % 

    none 

    1828

     16.5 - 20.0

    23.0 - 32.0

    METHOCEL K type

    2208

    19.0 - 24.0

    4.0 - 12.0**

    METHOCEL F type

    2906

     27.0 - 30.0

    4.0 - 7.5

    METHOCEL E type

    2910

     28.0 - 30.0

    7.0 - 12.0

     

     

     









    ** Note:  DuPont has elected to produce the METHOCEL cellulose ether K type products in the 7.0 - 12.0 % hydroxypropoxy range only.

    The full nomenclature is described as follows. METHOCEL is a trademark of The Dow Chemical Company for a line of cellulose ether products. An initial letter identifies the type of cellulose ether. "A" identifies methylcellulose products. "E", "F", and "K" identify different hydroxypropyl methylcellulose (USP Hypromellose) products. The number that follows identifies the viscosity in millipascal-seconds (mPa.s) of that product measured at 2% concentration in water at 20°C. In designating viscosity, the letter "C" is frequently used to represent 100 and the letter "M" is used to represent 1,000.  In the USP this is referred to as the labeled viscosity.  It is also given on the DuPont sales specification as the nominal viscosity.

    Several different suffixes are also used to identify special products. "P" is sometimes used to identify METHOCEL Premium grade products; Premium grade products are compliant with the United States Pharmacopeia (USP), European Pharmacopeia (PhEur), and the Japanese Pharmacopeia (JP).  "LV" refers to special Low Viscosity products, "CR" denotes a Premium, Controlled Release grade. "FG" identifies Food Grade products.  "G" identifies Granular products, the letter "S" identifies Surface-treated, cold-water dispersible products. Developmental grades are denoted by the letter "X" plus a second letter (usually "U" or "Y") plus a five-digit code.

    Example: METHOCEL J5MS is a Standard grade Hydroxypropyl methylcellulose product with a viscosity of 5,000 mPa s, which has been surface-treated for easy dispersion.

  • The METHOCEL cellulose ether packages are filled according to the legal requirement for size of container and the weight contained.  The requirement is listed in the NIST Handbook for Weights and Measures, 4th edition, Appendix A, Table 2.5.

    Bags:  According to the NIST handbook, packages labeled by weight more than 42.40 lb to 54.40 lb allow for +/- 0.5 lb weight variance.  This equates to a range of 49.5 - 50.5 lbs.
     
    25kg  (55.1 lb) Drums:  According to the NIST handbook, packages labeled by weight more than 24.67 kg or 54.40 lb allow for 2% weight variance.  For 55.1 lb (25 kg) drums, this equates to a range of +/- 1.1 lbs resulting in a range of 54.0 to 56.2 lbs.   
     
    50kg (110.2 lb) Drums:  According to the NIST handbook, packages labeled by weight more than 24.67 kg or 54.40 lb allow for 2% weight variance.  For 110.2 lb (50kg) drums, this equates to a range of +/- 2.2 lbs resulting in a range of 108.0 to 112.4 lbs.

  • General properties common to the whole family of METHOCEL cellulose ether products are listed below. Individual METHOCEL products exhibit these properties to varying degrees and may have additional properties that are desirable for specific applications.

    Water solubility - METHOCEL cellulose ethers dissolve in water with no sharp solubility limit.  Surface-treated and granular METHOCEL products can be added directly to aqueous systems.  This feature provides exceptional handling flexibility and control of solubilization rate.  Although untreated METHOCEL powders are soluble in cold water, they must first be thoroughly dispersed in the water to prevent lumping.  The maximum concentration is limited only by solution viscosity.

    Organic solubility - Certain types and grades of METHOCEL cellulose ethers are also soluble in binary organic and organic solvent/water systems, providing a unique combination of organic solubility and water solubility.

    No ionic charge - METHOCEL cellulose ethers are nonionic and will not complex with metallic salts or other ionic species to form insoluble precipitates.

    Thermal gelation - Aqueous solutions of METHOCEL products gel when heated above a particular temperature, providing controllable quick-set properties.  Unlike gels formed by protein thickeners, the gels go back into solution upon cooling.

    Surface activity - METHOCEL cellulose ether products act as surfactants in aqueous solutions to provide emulsification, protective colloid action, and phase stabilization. Surface tensions range from 42 to 64 mN/m. The surface tension of water is 72 mN/m; a typical surfactant has a surface tension of 30 mN/m.

    Metabolic inertness - Used as food and drug additives, METHOCEL products do not add calories to the diet.

    Enzyme resistance - Enzyme-resistant METHOCEL products provide excellent viscosity stability during long-term storage.

    Low taste and odor - METHOCEL cellulose ethers have excellent (low) flavor and aroma properties, which is important in food and pharmaceutical applications.

    pH stability - METHOCEL cellulose ethers are stable over a pH range of 3 to 11.

    Water retention - METHOCEL cellulose ethers are highly efficient water-retention agents. This is valuable in food products, ceramics, coatings on adsorbent construction substrates, and many other applications.

    Thickening - METHOCEL cellulose ethers thicken both aqueous and nonaqueous systems. The viscosity is related to the molecular weight, chemical type, and concentration of the specific METHOCEL product.

    Film formation - METHOCEL products form clear, tough, flexible films that are excellent barriers to oils and greases. In food applications, this property is often used to retain moisture and prevent oil absorption during cooking.

    Binding - METHOCEL cellulose ethers are used as high-performance binders for pigments, paper, structured foods, pharmaceutical products, and ceramics.

    Lubrication - METHOCEL products are used to reduce friction in rubber, cement, and ceramic extrusions. They are also used to improve pumpability of concrete and spray plasters, such as stucco, and in food applications as lubricity aids in extrusion and other forming processes.

    Suspending - METHOCEL products are used to control settling of solid particles, for example, herbs and spices in salad dressings, solids in ceramic slips, and antacid suspensions.

    Protective colloidal action - METHOCEL products are used to prevent droplets and particles from coalescing or agglomerating.

    Emulsification - METHOCEL cellulose ethers stabilize emulsions by reducing surface and interfacial tensions and by thickening the aqueous phase.

  • METHOCEL cellulose ether products are water-soluble polymers derived from cellulose, the most abundant polymer in nature.  Hydroxypropyl methylcellulose (HPMC) and methylcellulose (MC) are manufactured from highly purified cellulose which is further modified to obtain the desired properties. They are inert, high purity powders with no caloric value, and are virtually colorless, odorless and tasteless.

    Premium and Food Grades of METHOCEL HPMC and MC products are recognized as acceptable for use in food by the food regulatory bodies of almost every country. Hydroxypropyl methylcellulose and methylcellulose are listed in the current U.S. CFR, the Food Chemicals Codex and the International Codex Alimentarius. METHOCEL Premium products are also included in the current U.S. Pharmacopoeia, European Pharmacopoeia and Japanese Pharmacopoeia.

    Additionally, methylcellulose is Generally Recognized as Safe (GRAS) by the U.S. FDA. All METHOCEL HPMC Food Grade Products are considered by the FDA to be GRAS per GRAS Notification GRN 000213.  See the following link for the US FDA Agency Response Letter: 
     http://www.fda.gov/ucm/groups/fdagov-public/@fdagov-foods-gen/documents/document/ucm269093.pdf.

    METHOCEL Premium and Food Grade products are certified as Kosher and pareve for year-round and Passover use by the Union of Orthodox Congregations of America and they all conform to HALAL requirements.

  • The recommended re-evaluation/shelf life date is the length of time during which the product meets specifications when stored in accordance with recommended conditions. Beyond this date, it is recommended that the product not be used without further appropriate re-examination.

    The recommended reevaluation dates for METHOCEL™, WELLENCE VegE and AFFINISOL™ HME products are based on an on-going stability study in which products are stored in commercial packaging in warehouses in Plaquemine, LA (USA), Midland, MI (USA), Stade (Germany) and Bomlitz (Germany). Temperature and humidity are monitored routinely, and the minimum and maximum temperature and humidity during the time period from 2005 to 2012 were 43 to 102°F and 5 to 100% respectively. Storing product at temperature and humidity conditions outside of these ranges may shorten the time period for product reevaluation.

     
    Product Family Recommended Evaluation/
    Shelf Life Date
    (from Date of Manufacture)
    Conditions of Shipment and Storage
    AFFINISOL™ HPMC HME 24 Months - Boxes The product should be stored closed and kept indoors.

    DO NOT SHIP OR STORE with poisonous or ill-smelling articles as this product might
    be used in foods, feeds, personal care products, drugs, or their containers.

    DO NOT CONTAMINATE
    METHOCEL™ Industrial Grades 36 Months - Bags
    24 months - Super Sacks
    The product should be stored closed and kept indoors
    METHOCEL™ Food and Personal Care Grades
    METHOCEL™ MX
    METHOCEL™ SX
    36 Months - Bags24 Months - Super Sacks The product should be stored closed and kept indoors.
    DO NOT SHIP OR STORE with poisonous or ill-smelling articles as this product might be used in foods, feeds, personal care products, drugs, or their containers.
    DO NOT CONTAMINATE.
    WELLENCE™
    VegE Form
     36 Months – Bags
    24 Months – Super Sacks
    The product should be stored closed and kept indoors.

    DO NOT SHIP OR STORE with poisonous or ill-smelling articles as this product might be used in foods, feeds, personal care products, drugs, or their containers.

    DO NOT CONTAMINATE.
    METHOCEL™ Premium Grades & Premium CR  24 Months - Bags
    60 Months - Boxes
    60 Months - Drums
    The product should be stored closed and kept indoors.

    DO NOT SHIP OR STORE with poisonous or ill-smelling articles as this product might be used in foods, feeds, personal care products, drugs, or their containers.

    DO NOT CONTAMINATE.
    METHOCEL™ Premium VLV 60 Months - Boxes  

    Deterioration Characteristics (All Products)
    There may be an increase in Loss on Drying due to moisture pick-up as well as a slight decrease in viscosity for very high viscosity materials on long storage.

    METHOCEL Batch or Lot Number
     

Desarrollado por ChemPoint

DuPont y ChemPoint formaron una sociedad estratégica en abril de 2014 para establecer una nueva forma, entrega y modelo de servicio, diseñados específicamente para satisfacer las necesidades de los clientes en aplicaciones industriales para productos de polímeros de etilcelulosa ETHOCEL™, etilcelulosas METHOCEL™, polímeros solubles en agua POLYOX™ y productos WALOCEL™ CRT. Nuestro objetivo colectivo es mejorar la experiencia de los clientes al ofrecer un nivel más alto de servicio y soporte respaldado por un equipo técnico de marketing y ventas comprometido y centrado exclusivamente en ofrecer productos de celulosa y óxido de (poli)etileno. El equipo de celulosa industrial de ChemPoint funciona como una extensión integrada de DuPont y está siempre disponible para satisfacer las necesidades de los clientes en relación con la selección de productos, soporte técnico, realización de pedidos y cumplimiento. Además, nuestros clientes obtienen el soporte necesario de parte de los profesionales de la atención al cliente y cadena de suministro de ChemPoint con el fin de garantizar una entrega a tiempo y altos niveles de servicio.

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