Paint Stripper Super Paint Stripper/paint remover

 Paint Stripper  Super Paint Stripper/paint remover

Features:

l  Eco-friendly paint remover

l  Non-corrosion, use safety and operate easily

l  Does not contain acid, benzene and other harmful material

l  Can be reutilized by cleaning the paint film and paint slag in solution

l  Can remove the phenolic resin, acrylic, epoxy, polyurethane finishing paint and premier paint quickly

 

Application process:

l  Appearance: Colorless to light brown transparent liquid

l  Treatment way: Dipping

l  Treatment time:1-15min

l  Treatment temperature: 15-35℃

l  Post treatment: Flush the residue paint film by using high pressure water

Notice:

1. Precautions

(1) It is forbidden to touch it directly without safety protective;

(2) Wear safety gloves and goggles before using it

(3) Keep away from heat, fire and store it in shady, ventilated place

2. First aid measures

1. Wash it with plenty of water immediately, if contact with the skin and eye. Then ask for medical advice soonest.

2. Drink ~10% sodium carbonate aqueous immediately, in case swallow the paint remover. Then ask for medical advice soonest.

 

Application:

l  Carbon steel

l  Galvanized sheet

l  Aluminum alloy

l  Magnesium alloy

l  Copper, glass, wood and plastic etc

 

Package, storage and transportation:

l  Available in 200 kg/ barrel or 25 kg/ barrel

Storage period: ~12 months in closed containers, shady and dry place

Paint stripping and plasticizer

Paint stripping and plasticizer

preamble

At present, the development of paint stripper in China is very fast, but there are still some problems, such as high toxicity, unsatisfactory paint stripping effect and serious pollution. High quality, high technology content and high value-added products are few. In the process of preparing paint stripper, paraffin wax is usually added, although it can prevent the solvent from volatilizing too quickly, but after paint stripping, paraffin wax often remains on the surface of the object to be painted, so it is necessary to completely remove the paraffin wax, due to the different conditions of the surface to be painted, making it very difficult to remove the paraffin wax, which brings great inconvenience to the next coating. In addition, with the advancement of technology and social development, people are becoming more and more aware of environmental protection and have higher and higher requirements for paint strippers. For many years, the paint industry has been trying to reduce the use of solvents. However, solvents are very important to paint strippers, and therefore the selection of solvents is very important. Article 612 of the German Technical Specification (TRGS) has always restricted the use of methylene chloride paint strippers in order to minimize job hazards. Of particular note is the continued use of traditional methylene chloride paint strippers by decorators without regard for the safety of the working environment. Both high-solids and water-based systems are options in order to reduce solvent content and create a product that is safe to use. Therefore environmentally friendly and efficient water-based paint strippers will be the way forward for paint strippers. High-tech, high-grade paint strippers with high content are very promising.

Collapse edit this paragraph paint stripper types

1) Alkaline paint stripper

Alkaline paint stripper generally consists of alkaline substances (commonly used sodium hydroxide, soda ash, water glass, etc.), surfactants, corrosion inhibitors, etc., which are heated when used. On the one hand, alkali saponifies some groups in the paint and dissolves in water; on the other hand, hot steam cooks the coating film, causing it to lose strength and reducing its adhesion to metal, which, together with the effect of surfactant infiltration, penetration and affinity, eventually causes the old coating to be destroyed. Fade out.

2) Acid paint stripper.

Acid paint stripper is a paint stripper composed of strong acids such as concentrated sulfuric acid, hydrochloric acid, phosphoric acid and nitric acid. Because concentrated hydrochloric acid and nitric acid volatilize easily and produce acid mist, and have corrosive effect on the metal substrate, and concentrated phosphoric acid takes a long time to fade paint and has corrosive effect on the substrate, therefore, the above three acids are rarely used to fade paint. Concentrated sulfuric acid and aluminum, iron and other metals passivation reaction, so the metal corrosion is very small, and at the same time has a strong dehydration, carbonization and sulfonation of organic matter and make it dissolved in water, so concentrated sulfuric acid is often used in acid paint stripper.

3) Ordinary solvent paint stripper

Ordinary solvent paint stripper is composed of a mixture of ordinary organic solvent and paraffin, such as T-1, T-2, T-3 paint stripper; T-1 paint stripper is composed of ethyl acetate, acetone, ethanol, benzene, paraffin; T-2 is composed of ethyl acetate, acetone, methanol, benzene and other solvents and paraffin; T-3 is composed of methylene chloride, plexiglass, plexi-glass and other solvents. Ethanol, paraffin wax, etc. are mixed, low toxicity, good paint stripping effect. They have paint stripping effect on alkyd paint, nitro paint, acrylic paint and perchloroethylene paint. However, the organic solvent in this kind of paint stripper is volatile, flammable and toxic, so it should be applied in a well-ventilated place.

4) Chlorinated hydrocarbon solvent paint stripper

Chlorinated hydrocarbon solvent paint stripper solves the problem of paint stripping for epoxy and polyurethane coatings, it is easy to use, high efficiency and less corrosive to metals. It mainly consists of solvents (traditional paint strippers mostly use methylene chloride as organic solvent, while modern paint strippers usually use high boiling point solvents, such as dimethylaniline, dimethyl sulfoxide, propylene carbonate and N-methyl pyrrolidone, combined with alcohols and aromatic solvents, or combined with hydrophilic alkaline or acidic systems), co-solvents (such as methanol, ethanol and isopropyl alcohol, etc.) Activators (such as phenol, formic acid or ethanolamine, etc.), thickeners (such as polyvinyl alcohol, methyl cellulose, ethyl cellulose and fumed silica, etc.), volatile inhibitors (such as paraffin wax, ping ping, etc.), surfactants (such as OP-10, OP-7 and sodium alkyl benzene sulfonate, etc.), corrosion inhibitors, penetration agents, wetting agents and thixotropic agents.

5) Water-based paint stripper

In China, researchers have successfully developed a water-based paint stripper using benzyl alcohol instead of dichloromethane as the main solvent. Besides benzyl alcohol, it also includes thickening agent, volatile inhibitor, activator and surfactant. Its basic composition is (volume ratio): 20%-40% solvent component and 40%-60% acidic water-based component with surfactant. Compared with the traditional dichloromethane paint stripper, it has less toxicity and the same speed of paint removal. It can remove epoxy paint, epoxy zinc yellow primer, especially for aircraft skinning paint has a good paint stripping effect.

Collapse edit this paragraph common components

1) Primary solvent

The main solvent can dissolve the paint film through molecular penetration and swelling, which can destroy the adhesion of the paint film to the substrate and the spatial structure of the paint film, so benzene, hydrocarbon, ketone and ether are generally used as the main solvents, and hydrocarbon is the best. The main solvents are benzene, hydrocarbons, ketones and ethers, and hydrocarbons are the best. Low-toxic solvent paint stripper which does not contain methylene chloride mainly contains ketone (pyrrolidone), ester (methyl benzoate) and alcohol ether (ethylene glycol monobutyl ether), etc. Ethylene glycol ether is good for polymer resin. Ethylene glycol ether has strong solubility to polymer resin, good permeability, high boiling point, cheaper price, and is also a good surfactant, so it is active in the research of using it as the main solvent to prepare paint stripper (or cleaning agent) with good effect and many functions.

The molecule of benzaldehyde is small, and its penetration into the chain of macromolecules is strong, and its solubility to polar organic matter is also very strong, which will make the macromolecules increase in volume and produce stress. The low toxicity and low volatility paint stripper prepared with benzaldehyde as solvent can effectively remove the epoxy powder coating on the surface of metal substrate at room temperature, and is also suitable for the removal of aircraft skinning paint. The performance of this paint stripper is comparable to that of traditional chemical paint strippers (methylene chloride type and hot alkali type), but is much less corrosive to metal substrates.

Limonene is a good material for paint strippers from a renewable standpoint. It is a hydrocarbon solvent extracted from orange peel, tangerine peel and citron peel. It is an excellent solvent for grease, wax and resin. It has high boiling point and ignition point and is safe to use. Ester solvents can also be used as raw materials for paint stripper. Ester solvents are characterized by low toxicity, aromatic odor and insoluble in water, and are mostly used as solvents for oily organic substances. Methyl benzoate is the representative of ester solvents, and many scholars hope to use it in paint stripper.

2)Co-solvent

The co-solvent can increase the dissolution of methyl cellulose, improve the viscosity and stability of the product, and cooperate with the main solvent molecules to penetrate into the paint film, reduce the adhesion between the paint film and the substrate, so as to speed up the paint stripping rate. It can also reduce the dosage of the main solvent and reduce the cost. Alcohols, ethers and esters are often used as co-solvents.

3)Promoter

Promoter is a number of nucleophilic solvents, mainly organic acids, phenols and amines, including formic acid, acetic acid and phenol. It acts by destroying macromolecular chains and accelerating penetration and swelling of the coating. Organic acid contains the same functional group as the composition of paint film – OH, it can interact with the crosslinking system of oxygen, nitrogen and other polar atoms, lifting the system of part of the physical crosslinking points, thereby increasing the paint stripper in the organic coating diffusion rate, improve the paint film swelling and wrinkling ability. At the same time, organic acids can catalyze the hydrolysis of the ester bond, ether bond of the polymer and make it break the bond, resulting in the loss of toughness and brittle substrates after paint stripping.

Deionized water is a high dielectric constant solvent (ε=80120 at 20 ℃). When the surface to be stripped is polar, such as polyurethane, the high dielectric constant solvent has a positive effect on separating the electrostatic surface, so that the other solvents can penetrate into the pores between the coating and the substrate.

Hydrogen peroxide decomposes on most metal surfaces, producing oxygen, hydrogen and an atomic form of oxygen. The oxygen causes the softened protective layer to roll up, allowing the new paint stripper to penetrate between the metal and the coating, thus speeding up the stripping process. Acids are also a major component in paint stripper formulations, and their function is to maintain the pH of the paint stripper at 210-510 in order to react with free amine groups in coatings such as polyurethane. The acid used can be soluble solid acid, liquid acid, organic acid or inorganic acid. As inorganic acid is more likely to produce corrosion of metal, so it is best to use a RCOOH general formula, molecular weight less than 1,000 soluble organic acids, such as formic acid, acetic acid, propionic acid, butyric acid, valeric acid, hydroxyacetic acid, hydroxybutyric acid, lactic acid, citric acid and other hydroxy acids and their mixtures.

4) Thickeners

If paint stripper is used for large structural components that need to adhere to the surface to make them react, it is necessary to add thickeners such as water-soluble polymers such as cellulose, polyethylene glycol, etc., or inorganic salts such as sodium chloride, potassium chloride, sodium sulfate, and magnesium chloride. It should be noted that inorganic salts thickeners adjust viscosity will increase with their dosage, beyond this range, the viscosity is reduced instead, and improper selection can also have an impact on other components.

Polyvinyl alcohol is a water-soluble polymer, with good water solubility, film-forming, adhesion and emulsification, but only a few organic compounds can dissolve it, polyol compounds such as glycerol, ethylene glycol and low molecular weight polyethylene glycol, amide, triethanolamine salt, dimethyl sulfoxide, etc., in the above organic solvents, dissolve a small amount of polyvinyl alcohol should also be heated. Polyvinyl alcohol aqueous solution with benzyl alcohol and formic acid mixture of poor compatibility, easy layering, and at the same time with the methyl cellulose, hydroxyethyl cellulose solubility of poor, but and carboxy methyl cellulose solubility is better.

Polyacrylamide is a linear water-soluble polymer, it and its derivatives can be used as flocculants, thickeners, paper enhancers and retarders, etc.. As polyacrylamide molecular chain contains amide group, it is characterized by high hydrophilicity, but it is insoluble in most organic solutions, such as methanol, ethanol, acetone, ether, aliphatic hydrocarbons and aromatic hydrocarbons. Methyl cellulose aqueous solution in benzyl alcohol type of acid more stable, and a variety of water-soluble substances have good mixability. The amount of viscosity depending on the construction requirements, but the thickening effect is not directly proportional to the amount, with the increase in the amount added, the aqueous solution gradually reduce the gelation temperature. Benzaldehyde type can not be increased by adding methyl cellulose to achieve significant viscosity effect.

5) Corrosion Inhibitor

To prevent corrosion of the substrate (especially magnesium and aluminum), a certain amount of corrosion inhibitor should be added. Corrosiveness is a problem that cannot be ignored in the actual production process, and objects treated with paint stripper should be washed and dried with water or washed with rosin and gasoline in a timely manner to ensure that the metal and other objects are not corroded.

6) Volatile inhibitors

Generally speaking, substances with good permeability are easy to volatilize, so in order to prevent the volatilization of the main solvent molecules, a certain amount of volatilization inhibitor should be added to the paint stripper to reduce the volatilization of solvent molecules in the process of production, transportation, storage and use. When the paint stripper with paraffin wax is applied on the paint surface, a thin layer of paraffin wax will be formed on the surface, so that the main solvent molecules will have enough time to stay and penetrate into the paint film to be removed, thus improving the paint stripping effect. Solid paraffin wax alone will often cause poor dispersion, and a small amount of paraffin wax will remain on the surface after paint removal, which will affect re-spraying. If necessary, add emulsifier to reduce the surface tension so that the paraffin wax and liquid paraffin wax can be well dispersed and its storage stability can be improved.

7) Surfactant

The addition of surfactants, such as amphoteric surfactants (e.g., imidazoline) or ethoxynonylphenol, can help improve the storage stability of paint stripper and facilitate rinsing off paint with water. At the same time, the use of surfactant molecules with both lipophilic and hydrophilic two opposite properties of the surfactant, can affect the solubilization effect; the use of surfactant colloidal group effect, so that the solubility of several components in the solvent increased significantly. Commonly used surfactants are propylene glycol, sodium polymethacrylate or sodium xylenesulfonate.

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