Cellulose is a natural polymer compound of polysaccharide macromolecules, and its chemical structure is based on anhydrous β-glucose. Each base ring has one primary hydroxyl group and two secondary hydroxyl groups. A series of cellulose derivatives can be obtained through chemical modification, such as cellulose ether. Cellulose ethers are widely used in many industries, and cellulose ether in the coating industry is one of the main application areas of cellulose ethers.
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1. Properties of Cellulose Ether
1.1 Appearance
Cellulose ether is a white or milky white, odorless, non-toxic, fluid fibrous powder, easy to absorb moisture, and dissolves in water into a transparent viscous stable colloid.
1.2 Solubility
MC is soluble in cold water, insoluble in hot water, and soluble in some solvents; MHEC is soluble in cold water but insoluble in hot water and organic solvents. However, MC and MHEC will precipitate when the aqueous solution of MC and MHEC is heated. MC precipitates at 45~60&#;, while the precipitation temperature of mixed etherified MHEC increases to 65~80&#;.
1.3 Delayed expansion
Cellulose ether has a certain degree of delayed swelling in neutral pH water, but it can overcome this delayed swelling in alkaline pH water.
1.4 Viscosity
Cellulose ether is dissolved in water in colloidal form, and its viscosity depends on the degree of polymerization of cellulose ether. The solution contains hydrated macromolecules. Due to the entanglement of macromolecules, the solution&#;s flow behavior is different from that of Newtonian fluid, but it shows behavior that changes with shear force. Due to the macromolecular structure of cellulose ether, the solution&#;s viscosity increases rapidly with increased concentration and decreases rapidly with the increase of temperature.
1.5 Biological stability
Cellulose ether is used in the water phase. As long as there is water, bacteria will grow. The growth of bacteria leads to the production of enzyme bacteria. Enzyme bacteria break the bond of adjacent unsubstituted anhydroglucose unit of cellulose ether, which reduces the molecular weight of the polymer. Therefore, if the cellulose ether aqueous solution is to be stored for a long time, it is necessary to add preservatives. This is true even when using antibacterial cellulose ether.
2. Application of cellulose ether in the coating
Cellulose ether in the coating, such as HPMC, plays a significant role. Adding 0.2% to 0.5% of the total formula can thicken, retain water, prevent precipitation of pigments and fillers, and increase adhesion and bonding strength.
2.1 Viscosity
About cellulose ether viscosity grade for coating, you can watch the following video:
The viscosity of the aqueous solution of cellulose ether changes with the shearing force. Coatings and slurries thickened with cellulose ether also have this characteristic. To make the coating easy to apply, the type and quantity of cellulose ether must be carefully selected. For coatings, when cellulose ether is used, medium viscosity products can be used.
2.2 Water retention
Cellulose ether can prevent moisture from quickly entering the porous substrate so that during the entire construction process, it can form a uniform coating without making it dry too quickly. When the emulsion content is high, the water retention requirement can be met using less cellulose ether. The water retention of coatings and slurries depends on the concentration of cellulose ether and the temperature of the coating substrate.
2.3 Stabilize pigments, and fillers
Pigments and fillers have a tendency to precipitate. To keep the coating uniform and stable, the pigment filler must be suspended. Cellulose ether in the coating can make the coating have a specific viscosity and will not produce precipitation during storage.
2.4 Adhesion and bonding strength
Due to the excellent water retention and adhesion of cellulose ether, good adhesion between the coating and the substrate can be ensured. MHEC and NaCMC have excellent dry adhesion and adhesion, so they are especially suitable for paper reinforced pulp, while HEC is not suitable for this purpose.
2.5 Protective colloid function
Because of cellulose ether&#;s hydrophilicity, it can be used as a protective colloid for coatings.
2.6 Thickener
Cellulose ether is widely used in latex paint as a thickener to adjust the construction viscosity. Medium and high viscosity hydroxyethyl cellulose and methyl hydroxyethyl cellulose are mainly used in emulsion paint. Sometimes cellulose ether can be used together with synthetic thickeners (such as polyacrylate, polyurethane, etc.) to improve specific properties of latex paint and give the latex paint uniform stability.
3. In summary
Cellulose ethers have excellent water retention and thickening properties, but some properties and application are different. We have to choose viscosity grades according to different applications. Anionic cellulose ethers easily form water-insoluble salts with divalent and trivalent cations. Therefore, compared with methyl hydroxyethyl cellulose (HEMC) and hydroxyethyl cellulose (HEC), sodium carboxymethyl cellulose has lower scrub resistance.
New Jersey, United States:- The "Cellulose Ether for Coatings Market" reached a valuation of USD xx.x Billion in , with projections to achieve USD xx.x Billion by , demonstrating a compound annual growth rate (CAGR) of xx.x% from to .
Cellulose ethers are crucial additives in the coatings industry due to their versatile properties that enhance various aspects of coating formulations. Derived from cellulose, a natural polymer found in plants, cellulose ethers such as methyl cellulose (MC), hydroxypropyl methyl cellulose (HPMC), and ethyl cellulose (EC) are widely used for their ability to improve viscosity, water retention, adhesion, and film formation in coatings. These additives are particularly valued for their ability to modify rheological properties, making coatings easier to apply and ensuring uniform coverage on surfaces. Cellulose ethers also act as thickeners, stabilizers, and binders, providing formulation flexibility and enhancing the overall performance and durability of coatings.In the global market, the demand for cellulose ethers in coatings continues to grow, driven by trends towards sustainable and environmentally friendly products. The shift towards water-based coatings, which are more eco-friendly than solvent-based alternatives, has increased the use of cellulose ethers due to their compatibility with aqueous systems. Additionally, stringent regulations on VOC emissions have accelerated the adoption of cellulose ethers, as they contribute to reducing the environmental impact of coatings while maintaining performance standards. Emerging applications such as in architectural coatings, automotive coatings, and industrial coatings further expand the market for cellulose ethers, driven by their effectiveness in improving coating properties without compromising on environmental goals. As research and development efforts continue to enhance cellulose ethers' functionalities and applications, the market outlook remains optimistic for these essential additives in the coatings industry.
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Who is the Key Manufacturers of Cellulose Ether for Coatings Market worldwide?
Short Description About Cellulose Ether for Coatings Market:
The Global Cellulose Ether for Coatings market is anticipated to rise at a considerable rate during the forecast period, between and . In , the market is growing at a steady rate and with the rising adoption of strategies by key players, the market is expected to rise over the projected horizon.
Technological innovation and advancement will further optimize the performance of the product, making it more widely used in downstream applications. Moreover, Consumer behavior analysis and market dynamics (drivers, restraints, opportunities) provides crucial information for knowing the Cellulose Ether for Coatings market.
Cellulose Ether for Coatings Market Segments Analysis
The Cellulose Ether for Coatings Market research report employs a meticulous segmentation strategy, offering deep insights into various market segments such as application, type, and region. This approach provides readers with a nuanced understanding of the driving forces and obstacles within each segment, tailored to meet the discerning needs of industry stakeholders.
Cellulose Ether for Coatings Market By Type
Cellulose Ether for Coatings Market By Application
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Key Cellulose Ether for Coatings Market Research/Analysis Report Questions Answered in this report:
Detailed TOC of Global Cellulose Ether for Coatings Market Research Report, -
1. Introduction of the Cellulose Ether for Coatings Market
2. Executive Summary
3. Research Methodology of Verified Market Reports
4. Cellulose Ether for Coatings Market Outlook
5. Cellulose Ether for Coatings Market, By Product
6. Cellulose Ether for Coatings Market, By Application
7. Cellulose Ether for Coatings Market, By Geography
8. Cellulose Ether for Coatings Market Competitive Landscape
9. Company Profiles
10. Appendix
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