Zibo Hondo Chemical Co., Ltd. is one of the most experienced manufacturers and suppliers of painting grade cmc in China. Our factory offer high quality products made in China with competitive price. If you have any enquiry about quotation, please feel free to email us.
Hondo Painting used Sodium Carboxymethyl Cellulose (CMC) is a vital additive in the paint and coatings industry, known for its superior thickening, stabilizing, and dispersing properties.As a water-soluble anionic cellulose ether, Sodium Carboxymethyl Cellulose is widely recognized in the coating industry for its ability to control rheology, improve pigment stability, and enhance application performance in complex paint systems.Painting Grade CMC is widely used in decorative, industrial, and protective coatings, contributing to sustainable and high-performance paint formulations.It is especially suitable for water-based, low-VOC, and environmentally friendly coatings, where consistent viscosity, film quality, and long-term stability are required.
Function
Hondo Paint-grade carboxymethyl cellulose (CMC) occupies an extremely important position in the paint and coating industry and is a key additive. With Painting grade CMC's extraordinary thickening, stabilizing and dispersing properties, it plays an irreplaceable role in the coating formulation system. As a polymer with unique water solubility, paint-grade CMC can significantly enhance the comprehensive performance of water-based and solvent-based coatings. Painting Grade CMC functions as a multi-faceted additive that enhances the stability, application properties, and longevity of paint formulations. As a thickener, it provides the right balance of viscosity to achieve optimal flow and coverage. Its stabilizing function ensures that pigments and fillers remain uniformly suspended, preventing settling and phase separation. Additionally, CMC acts as a film-forming agent, contributing to a smooth and defect-free surface finish.
Another key function of Hondo Chem Painting grade CMC is its ability to regulate water retention in water-based paints. By controlling the evaporation rate, it allows for better film formation, reducing issues such as cracking or powdering. CMC powder also improves the resistance of the dried coating to moisture, chemicals, and abrasion, making it ideal for both interior and exterior applications. Its compatibility with various paint ingredients ensures that it integrates seamlessly into different formulations, providing consistent and reliable performance.
Main Application
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1. Industrial Protective painting Field
- Ship and Automotive Paintings: As a dispersant and anti-sedimentation agent, Painting grade CMC prevents the precipitation of metallic pigments (such as aluminum powder) or heavy fillers (such as barium sulfate), ensuring the storage stability of the coatings.
- Metal Anticorrosive Paintings: Working in conjunction with corrosion inhibitors, it uniformly disperses functional additives, enhancing the rust-proof and anti-permeation properties of the coating.
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2. Primer Paintings and Sealing Primers
- Hondo CMC can promote the penetration of the primer into the substrate and ensures uniform coverage.Enhanced penetration improves substrate wetting and anchoring performance. Painting grade CMC enhances the adhesion of the subsequent topcoat, reducing peeling and blistering. Improved interlayer adhesion reduces coating failure during service.Cellulose CMC improves the fluidity during construction and reduces splashing and spilling.This contributes to cleaner application and improved on-site efficiency.
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3. Special Functional Paintings (such as Mildew-proof Paint, Environmentally-friendly Water-based Paint)
- In mildew-proof, antibacterial, and low-VOC coatings, CMC cellulose, as a natural and environmentally-friendly material, meets the requirements of green building materials.Derived from renewable cellulose resources, Sodium CMC supports environmentally responsible coating formulations. As a biodegradable film-forming aid, it complies with the formulation trend of sustainable development.This aligns with global regulations and green building standards.
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4. Functional Paintings Industry
- Fire-retardant Painting: Acting as a carrier for flame retardants, Sodium CMC can uniformly disperses intumescent flame-retardant materials (such as ammonium polyphosphate), enhancing the flame-retardant efficiency and adhesion of the coating.
- Mildew-proof and Antibacterial Coatings: Painting grade CMC improves the suspension stability of antibacterial agents (such as nano-silver), extending the mildew-proof effective period of the coating.
- Conductive Coatings: By optimizing the leveling property, Cellulose CMC assists in the uniform distribution of conductive particles (such as graphene), ensuring the consistency of the conductive performance of the coating.
Application Solutions by Industry
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Based on long-term cooperation with coating manufacturers, Hondo Painting Grade CMC is applied as a solution-oriented additive in different coating systems:
Architectural & Decorative Paint Solutions
For interior and exterior wall paints, Painting Grade CMC helps balance flow, leveling, and sag resistance. This solves common issues such as uneven roller marks, splashing during application, and pigment settling during storage.
Industrial Protective Coating Solutions
In anticorrosive and heavy-duty coatings, CMC ensures uniform dispersion of inhibitors and fillers, improving barrier integrity and long-term corrosion resistance in harsh environments.
Functional & Specialty Coating Solutions
In flame-retardant, antibacterial, conductive, and low-VOC coatings, Painting Grade CMC supports stable dispersion of functional additives, ensuring performance consistency throughout the coating film.
Advantage
1. Viscosity Control and Rheology Adjustment
Painting Grade CMC plays a crucial role in modifying the viscosity of paint formulations, ensuring optimal flow and leveling properties.Stable rheology ensures consistent application across brushing, rolling, and spraying. Proper viscosity control prevents excessive dripping during application while maintaining smooth coverage.This improves coating uniformity and reduces material loss. This is particularly beneficial in architectural coatings, where uniform thickness and texture are essential for an aesthetically pleasing appearance.As a professional painting grade cellulose ether, Sodium CMC provides predictable viscosity build-up based on molecular weight and degree of substitution, allowing formulators to precisely control rheology in water-based paints. Factory data shows that properly selected CMC can reduce sagging by over 20% while maintaining excellent leveling, making it a reliable rheology modifier for large-scale architectural paint production and bulk procurement.
2. Film Formation and Adhesion Enhancement
Painting Grade Sodium CMC improves the cohesion of paint particles, leading to a more uniform and resilient film. Improved cohesion strengthens the internal structure of the coating film.It enhances adhesion to various substrates, including wood, metal, and concrete, reducing peeling and delamination issues.This makes it suitable for both decorative and industrial substrates. Additionally, Painting grade CMC contributes to the flexibility of the dried film, allowing it to withstand environmental stress such as temperature fluctuations and mechanical wear.
From a formulation perspective, cellulose CMC forms a micro-scale polymer network that promotes stronger bonding between pigments, fillers, and binders. This mechanism improves interfacial adhesion and crack resistance. Independent coating tests indicate that CMC-modified paints show noticeably lower film failure rates after thermal cycling, which is a key reason why sodium CMC for paint is widely used in long-life interior and industrial coating systems.
3. Superior Product Performance
Paints formulated with Hondo Cellulose CMC exhibit better coverage, enhanced adhesion, and improved resistance to external factors.These improvements translate into higher product quality and performance consistency. This results in longer-lasting coatings that require less maintenance, increasing customer satisfaction and brand reputation. Whether used in decorative home paints or industrial protective coatings, Painting grade CMC ensures consistent quality and reliability.
For bulk buyers and paint manufacturers, performance consistency is critical. Hondo Painting Grade CMC is produced under controlled viscosity and batch-uniformity standards, ensuring stable performance across different production lots. In practical applications, improved coverage efficiency can reduce paint consumption per square meter, while stable formulation behavior minimizes customer complaints, supporting brand positioning in competitive coating markets.
4. Economic Efficiency
By improving paint stability and performance, Na-CMC reduces material waste, leading to cost savings for manufacturers. Reduced waste and rework directly lower production costs.Its ability to extend the shelf life of paint formulations minimizes the need for reprocessing, allowing businesses to optimize production efficiency. Additionally, better application properties mean reduced product usage per coating layer, translating to lower overall consumption and higher profitability.
Compared with some synthetic thickeners, Sodium CMC offers a balanced cost-performance ratio. Typical addition levels of 0.2–1.0% are sufficient to achieve stable viscosity and storage performance, helping manufacturers control raw material costs. For wholesalers and long-term buyers, this translates into predictable formulation cost, reduced inventory risk, and higher overall return on investment in large-volume paint production.
Specification
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Spec. |
Standard |
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Appearance |
White or yellowish powder |
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Moisture |
≤10.0% |
|
DS |
≥0.80 |
|
Purity |
Technical or high purity |
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pH |
7.0～10.0 |
|
Viscosity (1% or 2% solution) |
5-8000 mPa·s |
Quality Control & Assurance System
To ensure stable quality and consistent performance, Hondo has established a systematic and controllable quality management process covering the entire production and supply chain of Painting Grade CMC.
Raw Material Control
Only qualified cellulose raw materials with stable fiber length and purity are selected. Incoming raw materials are inspected for moisture, ash content, and basic cellulose parameters to ensure a reliable starting point for consistent CMC performance.
01
Production Process Control
During etherification and modification, key parameters such as reaction temperature, alkalization level, and substitution efficiency are strictly controlled. This ensures stable Degree of Substitution (DS ≥ 0.80) and predictable rheological behavior in paint formulations.
02
In-Process Quality Inspection
Samples are taken at critical production stages to monitor viscosity development, solubility, and uniformity, preventing batch deviation before final processing.
03
Finished Product Inspection
Each batch of Painting Grade CMC is tested for:
Viscosity (1% or 2% solution)
Moisture content
pH value
Appearance and solubility performance
Only products meeting internal standards are approved for packing.
04
Pre-Shipment Inspection & Quality Guarantee
Before shipment, packaging integrity, labeling accuracy, and batch traceability are verified. A Certificate of Analysis (CoA) is available for each batch, ensuring transparency and confidence for bulk buyers.
05
Why Choose Hondo Painting Grade CMC
Controllable Quality System – Clear raw material control, production monitoring, and batch inspection
Industry-Focused Experience – Understanding coating formulation challenges beyond product supply
Flexible Specifications – Wide viscosity range to match different paint systems
Stable Supply Capability – Suitable for long-term and bulk procurement
Technical Communication Support – Assisting customers in formulation optimization and application troubleshooting
Degree of Substitution (DS ≥ 0.80)
A higher and stable DS improves water solubility and dispersion efficiency, which directly affects pigment suspension and long-term storage stability of finished paints.
Compatibility with Formulation Systems
Painting Grade CMC shows good compatibility with common binders, fillers, dispersants, and functional additives, minimizing the risk of flocculation or performance loss.
Application Performance Validation
Through practical use in decorative, industrial, and functional coatings, the product demonstrates reliable leveling, reduced sagging, and consistent film quality under various application methods.
Packing & Storage
Storage:
1. Carboxymethyl cellulose should store in a cool, dry, clean, ventilated environment. Temperature Max. 70℃, with relative humidity ≤80%.
Storage:
2. The CMC for pharmaceutical and food grade should not be put together with the toxic substance and harmful substance or substance with peculiar smell during transportation and storage.
Storage:
3. Since the date of production, a preservation period of sodium CMC should not exceed 4 years for the industrial product and 2 years for the CMC in pharmaceutical and food industry.
Storage:
4. The CMC should be prevented from water and package bag damaging during transportation.
Packing:
25kg kraft paper bag with PE inner, or as clients request.
Conclusion
By incorporating Painting Grade CMC into their formulations, paint manufacturers can achieve enhanced stability, improved application performance, and sustainable production, making it a crucial ingredient for high-quality coatings in various industries.As a coating-grade cellulose ether, Sodium CMC provides stable viscosity control, reliable water retention, and long-term suspension stability, helping reduce sagging, sedimentation, and batch-to-batch variation. Its consistent performance supports efficient large-scale production and lowers material waste. Widely used in architectural and industrial water-based paints, painting grade CMC enables manufacturers to balance performance, cost efficiency, and compliance with modern low-VOC and environmentally friendly coating requirements.
Frequently Asked Questions (FAQ)
Q1: How do I choose the right viscosity grade for my paint formulation?
A: Low to medium viscosity grades are suitable for high-flow decorative paints, while higher viscosity grades are recommended for thick coatings or vertical surface applications.
Q2: Can Painting Grade CMC replace other thickeners in paint systems?
A: In many water-based systems, CMC can partially or fully replace synthetic thickeners while providing better water retention and film formation.
Q3: Is batch consistency guaranteed for long-term supply?
A: Yes. Controlled production parameters and internal quality standards ensure stable performance across different batches.
Q4: Do you provide technical documents for procurement?
A: Certificate of Analysis (CoA), specification sheets, and storage guidance are available to support procurement and quality verification.
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