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METHOCEL™ (HPMC and MC): What It Is, Uses, and How to Select a Grade
What Is METHOCEL™?
Roquette’s METHOCEL™ cellulose ethers are multifunctional, plant-based methylcellulose (MC) and hydroxypropyl methylcellulose (HPMC) polymers used to provide thickening, rheology modification, stabilization, water retention, binding, and film formation in a wide range of formulations.
METHOCEL™ is used across applications such as paints and coatings, adhesives, cleaners, ceramics, building products, agriculture, food, pharmaceuticals, personal care, and suspension PVC. Because multiple grades are available, formulators should evaluate more than just the brand name: viscosity, substitution chemistry, surface treatment, solubility, gelation temperature, and end-use requirements all affect grade fit.
What Is METHOCEL™ Made Of?
METHOCEL™ is made of either methylcellulose (MC) or hydroxypropyl methylcellulose (HPMC), both of which are water-soluble polymers derived from cellulose from natural wood or cotton linters. Depending on the grade, METHOCEL™ is made from 65%–87% natural content calculated in accordance with ISO 16128.
Cellulose
METHOCEL™ A Grades
Methylcellulose (MC)
Methylcellulose (MC)
METHOCEL™ E, F, K, and J Grades
Hydroxypropyl Methylcellulose (HPMC)
Hydroxypropyl Methylcellulose (HPMC)
Is METHOCEL™ Safe?
METHOCEL™ is available in industrial, food-grade, and premium-grade products. Food- and premium-grade products have been evaluated by regulatory bodies in the European Union and the United States for use as food additives. They are commonly considered generally recognized as safe (GRAS) when used appropriately.
What Makes METHOCEL™ Unique?
Many thickeners, rheology modifiers, and film-forming agents provide one or more similar functions, but METHOCEL™ is valuable because it combines several formulation benefits in one ingredient.Shear-thinning rheology modification: Improves workability by lowering apparent viscosity during application and increasing structure at rest.
- Reversible thermal gelation: Rapidly increases viscosity at elevated solution temperatures and returns toward the original viscosity as the solution cools, supporting green strength in selected formulations.
- Viscosity control from 15 cPs to 120,000 cPs: Gives formulators a wide range of thickness and flow-control options.
- Stabilization of suspensions and emulsions: Helps maintain product consistency where solid particles or emulsified phases are present.
- pH stability from pH 3 to 11: Supports use in a wide range of acidic, neutral, and alkaline formulations.
- Solubility in water and selected organic solvent systems: Enables use across water-based and certain mixed-solvent formulations.
- Plant-derived polymer backbone: Supports bio-content and sustainability positioning where relevant to application requirements.
What is METHOCEL™ Used for?
METHOCEL™ is often associated with food and beverage thickening, but its industrial value extends well beyond consumer food uses. In technical formulations, METHOCEL™ helps improve water retention, film formation, green strength, stability, viscosity control, workability, and suspension behavior.
Key Functionalities
- Film formation
- Oil and water repellency
- Contaminant migration prevention
Benefits
- Creates easier recycling streams
- Prevents migration of contaminants from recycled paper into food
- Thermal gelation
- Rheology modification
- Clean burnout
- Improved green strength
- Fewer structural defects and rejects of complex-shaped parts
- Thermal gelation
- Rheology modification
- Clean burnout
- Improved green strength
- Ceramic tape with fewer defects and better continuity
- Thickening
- Rheology modification
- Stabilization
- Increased adhesive and cohesive strength
- Improved green strength
- Easier application onto vertical and overhead surfaces
- Water retention
- Rheology modification
- Enhanced strength and workability
- Higher durability and reduced cracking
- Better physical appearance
- Thickening
- Rheology modification
- Stabilization
- Film formation
- Higher durability of paints and coatings
- Extended shelf life of paints and coatings
- Reduced waste from dripping and sagging
- Thickening
- Rheology modification
- Organosolubility
- Compatibility with a wide variety of solvents
- Increased contact time on vertical and overhead surfaces
- Thickening
- Rheology modification
- Stabilization
- Soil antiredeposition
- Compatibility with a wide variety of pH and cleaning solvents
- Better cleaning effectiveness
- Increased contact time for sprayed formulations
- Rheology modification
- Stabilization
- Prevention of active ingredient crystal growth
- Longer product shelf life
- Reduced active ingredient concentration
- Protective colloid formation
- Better control over PVC resin grain size, porosity, and bulk density
Agricultural Seed Coatings
- Rheology modification
- Film formation
- Enhanced seed coating strength
- Effective nutrient binding
How Do I Select a METHOCEL™ Grade?
METHOCEL™ should be selected for liquid formulations based on three main criteria: the desired viscosity, the presence of organic solvents, and the need for thermal gelation. These criteria can be identified by the grade nomenclature below and are detailed in the following sections.
Substitution
METHOCEL™ cellulose ethers are cellulose polymers with methoxyl and hydroxypropyl functional group substitution. The letter following the METHOCEL™ brand indicates the degree and nature of functional-group substitution. Higher hydroxypropyl substitution generally improves solubility in organic solvents, while higher methoxy substitution corresponds with a lower thermal gelation temperature.Chemistry
|
A
|
E
|
F
|
J
|
K
|
|---|---|---|---|---|---|
Methoxy substitution, %
|
27.5–31.5
|
28.0–30.0
|
27.0–30.0
|
16.5–20.0
|
19.0–24.0
|
Hydroxypropyl substitution, %
|
0.0
|
7.0–12.0
|
4.0–7.5
|
23.0–32.0
|
25.0–32.0
|
Viscosity
In general, solution viscosity correlates with molecular weight. Higher–molecular–weight grades produce higher viscosity and stronger shear-thinning behavior. METHOCEL™ viscosity in a 2% solution is identified by a number and multiplier letter, where C is a 100x multiplier, and M is a 1000x multiplier. LV grades indicate low-viscosity grades relative to the broader portfolio. For example, METHOCEL™ J75MS has a mean viscosity of 75,000 cPs at 2% by weight in water. Actual solution viscosity will depend on the concentration of METHOCEL™ used, the solvent system, and formulation conditions. The graph below shows the viscosity imparted by common METHOCEL™ grades in deionized water at varying concentrations.
Below is a graph highlighting the relationship between the molecular weight of METHOCEL™ and shear-thickening effects, which increase as the polymer’s molecular weight increases.
Shear-thickening effects also become more pronounced as concentration increases, as shown below.
Surface Treatment
METHOCEL™ grades with an S after the multiplier letter have been surface- treated to enable delayed hydration. Surface-treated grades can be dispersed before hydration is triggered by pH adjustment, thereby simplifying solution preparation in selected formulation processes.METHOCEL™ Grades
METHOCEL™ A grades are methylcellulose grades with no hydroxypropyl substitution. They offer cold-water solubility, organic-solvent compatibility in selected systems, shear-thinning rheology, and the lowest listed thermal gelation range among the grade families. Consider A grades when methylcellulose chemistry, firm thermal gelation, and viscosity selection in the low- to medium-range are important to the formulation."A" Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
15
|
50–55
|
|
15
|
50–55
|
|
400
|
50–55
|
|
400
|
50–55
|
|
1,500
|
50–55
|
|
1,500
|
50–55
|
|
4,000
|
50–55
|
|
4,000
|
50–55
|
|
4,000
|
50–55
|
METHOCEL™ E grades are hydroxypropyl methylcellulose grades with relatively higher methoxy substitution and moderate hydroxypropyl substitution. They provide cold-water solubility, shear-thinning viscosity control, surface activity, and semi-firm thermal gelation in the 58–64°C range. Consider E grades when an HPMC grade is needed for low- to high-viscosity targets, with balanced solubility and gelation behavior.
"E" Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
3
|
58–64
|
|
5
|
58–64
|
|
6
|
58–64
|
|
15
|
58–64
|
|
50
|
58–64
|
|
10,000
|
58–64
|
|
10,000
|
58–64
|
METHOCEL™ F grades are hydroxypropyl methylcellulose grades with methoxy and hydroxypropyl substitution levels between the A/E and J/K families. They provide cold-water solubility, shear-thinning rheology, surface activity, and semifirm thermal gelation in 62°C–68°C. Consider F grades when the formulation requires HPMC functionality, a moderate gelation temperature, and low to medium viscosity control.
"F" Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
50
|
62–68
|
|
400–630
|
62–68
|
|
4,000
|
62–68
|
|
4,000
|
62–68
|
METHOCEL™ J grades are hydroxypropyl methylcellulose grades with lower methoxy substitution and relatively high hydroxypropyl substitution. They are useful when higher-viscosity HPMC options, strong shear-thinning behavior, and delayed hydration through surface treatment are relevant selection factors. Consider J grades when the formulation needs substantial viscosity build, controlled dispersion, and a gelation range around 60°C–70°C.
"J" Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
12,000
|
60–70
|
|
75,000
|
60–70
|
METHOCEL™ K grades are hydroxypropyl methylcellulose grades with comparatively high hydroxypropyl substitution and the highest listed thermal gelation range among the standard families. They provide cold-water solubility, shear-thinning rheology, suspension and stabilization support, and viscosity options from very low to high ranges. Consider K grades when higher gelation temperature, broad viscosity selection, or surface-treated versions are important to for processing or performance.
"K' Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
2.4–3.6
|
70–90
|
|
100
|
70–90
|
|
100
|
70–90
|
|
4,000
|
70–90
|
|
4,000
|
70–90
|
|
15,000
|
70–90
|
|
15,000
|
70–90
|
METHOCEL™ grades listed below should be selected by matching viscosity, substitution profile, surface treatment, and required performance attributes to the formulation. METHOCEL™ 311 is the most organosoluble grade within the portfolio and should be considered first when organic solvents are the primary liquid carrier in formulations.
Other Grades
|
Viscosity (2% in water), cPs
|
Thermal gelation temperature, °C
|
|---|---|---|
5,000
|
62–68
|
|
32,000
|
62–68
|
|
40,000
|
62–68
|
|
40,000
|
62–68
|
|
120,000
|
N/A
|
How Do I Use METHOCEL™?
METHOCEL™ products can be incorporated into solutions or, because they are thermoplastic polymers, melt processed into sheets or shapes. If using METHOCEL™ in solution, powders should be dispersed properly before hydration to prevent clumping and inconsistent viscosity development.Untreated Powders
Untreated METHOCEL™ powders are soluble in cold water and some organic solvents and must be thoroughly dispersed to prevent clumping. A common approach is to disperse METHOCEL™ into a portion of hot water, then add the remaining liquid as cold water or ice to lower the temperature and allow complete hydration and thickening.For an in-depth look at performing this technique, check out this video.
Surface-Treated Powders
Surface-treated METHOCEL™ grades can be added directly to pH-neutral water and dispersed with mild agitation. Hydration is then triggered by adjusting the pH to approximately 8.5–9.0. Once hydration is complete, the pH can be readjusted while keeping the solution stability requirements in mind.Where Can I Buy METHOCEL™?
ChemPoint offers METHOCEL™ in commercial package sizes for industrial and technical applications. If you are evaluating METHOCEL™ for coatings, adhesives, building materials, ceramics, cleaners, agriculture, food- contact formulations, or PVC applications, contact ChemPoint to ask a question, request a quote or sample, or receive grade-selection support.
Frequently Asked Questions About METHOCEL™
Is METHOCEL™ the same as HPMC
Some METHOCEL™ grades are HPMC, while A grades are methylcellulose (MC). Grade letters indicate substitution chemistry and help distinguish MC from HPMC grades.
What is METHOCEL™ used for in industrial formulations?
METHOCEL™ is used for thickening, rheology control, water retention, binding, film formation, stabilization, green strength, and protective colloid behavior across coatings, adhesives, ceramics, building products, cleaners, agriculture, food, pharmaceuticals, and PVC applications.
How do I choose a METHOCEL™ grade?
Start with the formulation problem: viscosity target, solvent system, thermal gelation need, surface treatment, processing conditions, and regulatory requirements. Then compare grade family and viscosity options.
Can METHOCEL™ be used in both food and industrial applications
Yes. METHOCEL™ is available in different grades for food, pharmaceutical, personal care, and industrial formulations. The right grade depends on the application, regulatory requirements, viscosity target, processing conditions, and whether the formulation needs functions such as thickening, water retention, stabilization, film formation, or thermal gelation.
Where can I buy industrial METHOCEL™?
ChemPoint offers METHOCEL™ for industrial and technical applications in commercial package sizes and can help formulators request a quote, sample, or grade recommendation.
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