KimaCell® HPMC MP10M is medium viscosity cellulose ether. The upstream raw material of cellulose ether is mainly refined cotton/cotton pulp/wood pulp, which is alkalized to obtain cellulose, and then propylene oxide and methyl chloride are added for etherification to obtain cellulose ether. Cellulose ether has the reputation of "industrial monosodium glutamate" and has excellent properties such as solution thickening, good water solubility, suspension or latex stability, film forming, water retention, and adhesion. HPMC MP10M is hydroxypropyl methyl cellulose for water based paint and paint remover.
|Chemical name||Hydroxypropyl Methyl Cellulose|
|Synonym||Cellulose ether; Hypromellose; Cellulose, 2-hydroxypropyl methyl ether; Hydroxypropyl methyl cellulose; HPMC; MHPC|
|Product Grade||HPMC MP10M|
|Solubility||Water Soluble Cellulose Ether|
|Physical form||White to off-white cellulose powder|
|Viscosity Brookfield 2% solution||8000-12000 mPa.s|
|Viscosity NDJ 2% solution||8000-12000 mPa.S|
|Mesh size||99% pass 100 mesh|
KimaCell® HPMC MP10M can be used in water based paint and paint remover: The principle of paint stripping and the classification of paint strippers.
The paint remover is a solvent or paste that can dissolve or swell the coating film, and is mainly composed of a solvent with strong dissolving ability, paraffin, cellulose ether, etc.
In the shipbuilding industry, mechanical methods such as manual shoveling, shot blasting, sandblasting, high-pressure water and abrasive jets are mainly used to remove old coatings. However, for aluminum hulls, mechanical methods are easy to scratch aluminum, so the main Use sandpaper to polish, paint stripper, etc. to remove the old paint film. Compared with sanding, the use of paint remover to remove the old paint film has the advantages of safety, environmental protection and high efficiency.
The advantages of using paint remover are high efficiency, use at room temperature, less corrosion to metal, simple construction, no need to increase equipment, and the disadvantage is that some paint removers are toxic, volatile, flammable, and costly. In recent years, a variety of new paint remover products have emerged, and water-based paint removers have also been produced. The paint removal efficiency has been continuously enhanced, and the environmental protection performance has been continuously improved. Non-toxic, low-toxic, and non-flammable products have gradually occupied the mainstream market of paint removers.
The paint remover mainly relies on the organic solvent in the paint remover to dissolve and swell most coating films, so as to achieve the purpose of removing the old coating film on the surface of the substrate. When the paint remover penetrates into the polymer chain gap of the coating polymer, it will cause the polymer to swell, so that the volume of the coating film will continue to increase, and the internal stress generated by the increase in the volume of the coating polymer will weaken and Finally, the adhesion of the coating film to the substrate is destroyed, and the coating film develops from point-like swelling to sheet swelling, causing the coating film to wrinkle, completely destroying the adhesion of the coating film to the substrate, and finally the coating film is bitten off. clear.
Paint strippers are divided into two categories according to the different film-forming substances removed: one is formulated with organic solvents such as ketones, benzenes, and ketones, and a volatilization retarder paraffin, commonly known as white lotion, and is mainly used for Remove old paint films such as oil-based, alkyd and nitro-based paints. This type of paint remover is mainly composed of some volatile organic solvents, which have problems such as flammability and toxicity, and are relatively cheap.
The other is a chlorinated hydrocarbon paint remover formulated with dichloromethane, paraffin and cellulose ether as the main components, commonly known as water flush paint remover, mainly used to remove epoxy asphalt, polyurethane, epoxy poly Cured old coating films such as phthalamide or amino alkyd resin. It has high paint removal efficiency, low toxicity and wide application. The paint remover with dichloromethane as the main solvent is also divided into neutral paint remover (pH=7±1), alkaline paint remover (pH>7) and acidic paint remover according to the difference of pH value.