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Paint Knowledge

Paints Guide

Ready-Mixed Paint

Most of the ready-mixed paint found on the market is mixed with alkyd resin, weather-resistant pigments, and additives. It is used for painting ordinary metal and wood. The paint film of ready-mixed paint is hard, good adhesion, and is easy to use and work with. Its drying time is long: Normally, the overcoating intervals is above 10 hours. If the painted film is too thick and takes too long to dry, wrinkles or cracks may appear on the surface because the paint under the dry surface is still wet.

The paint can be applied with brush, roller, or air spray. It must be well and thoroughly mixed before use; if the paint viscosity is too high, thinner can be used as the dilution. The amount of dilution varies according to the tool used for painting.

Cement Paint

Generally, cement paint can be divided into two types: water-based and solvent-based.

  • Solvent-based cement paint:The main formula is acrylic resin, mixed with special synthetic resin and pigments with good resistance to weather and alkali. Its paint film is hard and flexible, and is resistant to weather, water, and chemical damage. It also adheres well to cement surfaces and dries easily. Xylene can be used as its dilution. Solvent-based cement paint can be painted on cement walls to protect and decorate the walls of a building.
  • Water-based cement paint:This paint can be subdivided into the categories of indoor and outdoor. The formula for the outdoor paint is acrylic resin, which has good weather and alkali resistance, mixed with weather-enduring pigments, and the additives. The paint features high gloss, hard film, and good water, alkali, and weather resistance. Indoor paint is made with water-based resin, with good water and alkali resistance, enduring pigments, and the additives.

The paint must be well mixed before use. If the paint is too thick, water can be used to dilute it. The manufacturer’s instructions and the requirements for dilution must be followed. Using water as the dilution means that the paint is neither a source of environmental pollution nor a fire hazard. Water-based cement paint is widely used in office buildings, hotels, public spaces, hospitals, residences, and factories to protect and decorate the walls. Easy to use, it can be divided into gloss, semi-gloss, and flat, each category tailored to meet different needs.

Emulsion Paint

Emulsion paint is a water-soluble coating formulated with alkali-resistant pigments and additives. Generally, it can be divided into the following categories by resin system:

  • Acrylic Emulsion System
  • Poly Vinyl Acetic Acid (PVAC)
  • Poly Vinyl Chloride (PVC)
  • Poly Vinyl Alcohol (PVA)

The color of emulsion paint is soft, and the paint is easy to use. Most users believe that emulsion paint has a less desirable physical chemistry than cement paint. This is not exactly true, since the good emulsion paint is more useful than cement paint. Typically, flat emulsion paint is more frequently used since it covers the roughness of the walls. It is widely used in industries and households.

Anti-Corrosive Primer

Anti-corrosive primer is used on steel and other metallic products to prevent oxidation and corrosion. There are many kinds of primer, all of which cannot be fully listed here.

Most of the primer bases are alkyd resin, phenolic resin, chlorinated rubber, epoxy resin, vinyl resin, ethyl silicate. These are mixed with anti-corrosive pigments, such as ferric oxide, MIO, alumina powder, alumina paste, zinc powder, red lead, zinc chromate, zinc phosphate, aluminum tripolyhosphate, PbO, and others. The anti-corrosive effect depends on the types of resin, anti-corrosive pigments, adhesiveness, and other features.

The drying time of the primer, which depends on the type of resin, can range from one to eight hours. The thickness of the painted film also influences the drying time. In addition, the middle or topcoat used on the primer should be compatible with the primer. (The compatibility of the paint must be checked.) A wrong choice may result in cracks, wrinkles, blisters, lifting, and the inability to dry properly. The basic principle of choosing the primer and the middle or topcoat is that they should belong to the same resin system; or the solubility of thinner in the middle or topcoat must be weaker than the primer.

Polyurethane Paint

Polyurethane paint is also called PU paint, and is usually divided into one-pack and two-pack systems. The one-pack system can be further divided into three types: oil-modified, block, and moisture-cured. Most products found on the market belong to Polyol-cured (two-pack) and moisture-cured (one-pack) (1), which are suitable for DIY.

Before the two-pack PU paint is used, the base and the curing agent must be well mixed. The curing agent, polyisocyanate, is toxic, and care must be taken when using it. The moisture-cured type must be used and dried in an environment of high relative humidity.

PU paint has good water, chemical, and weather resistance, and is frequently used in painting outdoor construction.

In choosing PU paint, consumers must know that the L type PU paint ages easily and is not suitable for light painting. To prevent aging, it is better to use N or NN type PU paint.

When using PU paint, one must follow the mixing ratio instructed by the manufacturer and use the specified dilution to ensure its characteristics, the curing effect, and the best function of its film. Usually, an air spray is used for PU paint (2), and thickness of each coat should not be too thick, otherwise the painted surface will be blistering.

(1) The moisture-cured PU paint should belong to the two-pack system: One pack is the paint itself; the other pack is the air's moisture. (2) The paint should be ordered specially to prevent a blistering surface if the application is by brush and roller.

Epoxy Coating

Epoxy resin is a kind of polymer formulated by Bisphenol A and Epichlorohydrin. It is widely used as an adhesive, a dental material, an injection material for plastic, a construction material, as electrical insulation, and so on. The coating based on epoxy has excellent properties in adhesive, chemical (especially alkali) resistant, abrasion resistant, and insulator. Therefore, it is widely used by food manufacturers, GMP, electric-related manufacturers, hospitals, and other operations where good sanitary and hygienic conditions are extremely important.

Epoxy can be divided into water-based and solvent-based types. The water-based type is widely used on the interior walls and the floors in electrical manufacturers, food manufacturers, and GMP factories. The solvent-based type can be further divided into solvent and solventless types.

There are three kinds of epoxy resins: esterification, thermal curing, room temperature curing. The room temperature curing epoxy resin is better in application, workability, and quality, and is therefore more frequently used. This type dries aided by the proper mixture of epoxy as the base agent and polyamide or polyamine as the curing agent. After application, the cross-linking reaction under normal temperatures will dry the mixture. The ratio of the mixed components must follow the manufacturer’s instructions. The mixed paint can be used at once but is limited by its pot life. The painting tools must be cleaned thoroughly after use.

The physical and chemical property of epoxy paint is better than PU paint. However, epoxy paint cannot resist UV rays, which will cause discoloring and chalking of the film. Therefore, most exterior construction will use PU paint as the topcoat.

Chlorinated Rubber Paint

Chlorinated rubber is formulated through the reaction of raw rubber and chlorine, and dissolved in aromatics or ester solvent. Due to its poor heat resistance, other kinds of resin must be added to modify its chemistry to make it suitable to be used as paint. If too much resin is added, however, the chemistry of the chlorinated rubber will be compromised.

To improve the adhesive and water resistance problem of the single rubber paint, a proper amount of the cyclized rubber should be added to improve its function and flexibility. Such paint is usually called acid and alkali resistance rubber paint, or chlorinated rubber paint, or just “the rubber paint.”

Since rubber paint can be made to the topcoat and primer, and can be used with other anti-corrosive primers (such as epoxy), it is easy to use. Moreover, it dries quickly because the curing mechanism belongs to the solvent release, and because of its strong adhesiveness, it is widely used in steel construction. Nevertheless, because its production process uses chlorine carbon components, it is gradually being replaced by other paints (such as epoxy or PU) in response to increasing concerns for protecting the environment.

Yung-Flon Coating

Yung-Flon Coating(Fluoride Coating)
Fluorocarbon resin is a revolutionary, durable product in paints. First used in the Space Industry, it was later widely used for general purposes. Its most important feature is its adaptation of the latest molecular structure. Fluorocarbon resin is formulated with the highly weather- resistant curing agent and various special chemical materials, and is widely used on permanent structures, which are difficult to maintain, such as tall buildings, skyscrapers, long bridges, towers, outdoor storage facilities, large buildings, ships, vehicles, factories, steel frames, and other non-iron metal materials. Its “permanent” protection lasts more than 15 years.

Fluorocarbon resin is well-known for its high chemical, weather, and pollution resistance. These properties are even more recognized ever since the success of the Apollo Project. It is widely used in industry as well as in the production of domestic products. In the past, fluorocarbon resin could only be used after a high heating treatment; therefore, its application was limited. As a result of exhaustive research by our company and the application of the professional technology from foreign countries, room-temperature-curing Yung Flon Paint has been developed. This product is the ultimate in synthetic resin paint, and no other paints can compete with its superior weather endurance.

The magic of fluorocarbon resin originates from its solid C-F structure that surrounds the C-C of the synthetic resin, and the solid connection of the spiral sharp helix F atom that prevents the aging caused by the serious damage from the UV rays and thus maintains an amazing, long-lasting gloss. Moreover, its highly adhesive quality makes it usable on any kind of materials. Its electrical, mechanical, and painting characteristics make it ideal for repair and maintenance projects.

The anti-UV characteristic of fluorocarbon resin reduces the aging, preserves the gloss, and prolongs the maintenance cycle of the materials. The initial gloss of fluorocarbon resin is higher than 80 %, and with its high transparency, it can be painted on vehicles or household appliances to preserve their beautiful gloss. The molecular structure of fluorocarbon resin is stable, and its high chemical resistance makes it ideal for use in food-processing and chemical factories. With its outstanding weather resistance, it is widely used in coastal, mountainous, foggy, and drought-affected areas.

Fluorocarbon resin’s stable structure and strong adhesive ability on all materials, even alumina or non-metal materials make it suitable for use on curtains, blinds, and signboards. It can be applied with any painting method, in normal temperature or in the baking curing process, and is widely used in factories or construction sites. Since fluorocarbon resin has good repainting qualities, it can be used in repairs involving repainting using the same type of paint. Since it has good adhesive ability, it is very effective for anti-corrosive applications. Oxidation is the key factor determining the life of painted materials. Since the permeability coefficient of fluorocarbon resin is lower than any paints known, fluorocarbon resin is therefore the best anti-corrosive paint used to prolong the life of base materials.

Toplong Coating

Toplong Coating(Silicone Acrylic )

Silicone acrylic resin paint is made of special resin with in inorganic component. Combining the weather-resistant feature of the inorganic component and the high flexibility of organic polymer, it is compatible with both the inorganic and the organic resin. It can be repainted, and is ideal for treating metal, cement, and plastic. It has many characteristics not found in ordinary paints.

Silicone acrylic resin paint belongs to the two-pack paint, which means that the base and the curing agent must be mixed before being used. It can be applied with brush, air spray or airless spray.

Silicone acrylic resin paint is highly weather resistant, and its gloss-retention is close to that of fluorocarbon resin paint. Its excellent adhesion makes it adhere well to organic or inorganic substrate. Stains on painted surfaces can be easily removed since it is so highly pollution resistant, and is easy to use because of its safe and non-toxic features.

Unsaturated Poly Vinyl Ester Coating

Vinyl ester is a kind of liquid thermosetting resin diluted with Styrene and cured with a free radical initiator. It is mainly formulated through the pre-polymer formed through the reaction between epoxy and Styrene monomer. The special chemical structure of Styrene ester gives it the combined features of strength, flexibility, and anti-corrosiveness. It hardens at both room and high temperatures; these paints belong to the room-temperature type.

Unsaturated Poly Vinyl Ester can be divided into two types according to its characteristics: the normal type and the heat- and strong-acid-resistant type. Generally, the normal type reacts well to corrosion in any kinds of acid and alkali environments under 100℃. Since the heat- and strong- acid-resistant type not only possesses good heat resistance and oxidation resistance, but also has an outstanding solvent resistance under 180℃, both types can be used in anti-corrosion construction with glass flake or fiber mats. (When used with fiber mats, the application is also known as FRP.)

The preserving condition of Unsaturated Poly Vinyl Ester is that it must be preserved under 5℃ to keep the effective period for three months, and the effective period will be shortened (about 12 days in 30℃) if the previous condition is not met. Unsaturated Poly Vinyl Ester is the two-pack type of paint, and the ratio of the curing agent is about 1% to 2%. The base and curing agents must be thoroughly mixed before use, and the pot life is about 25 to 35 minutes (25℃). The mixture will be completely cured after its pot life, and the paint tools must be thoroughly cleaned with special cleansing solvent.

Heat-Resisting Paint

Heat-Resisting Paint(Silicone Resin)

Silicone resin is widely used in many areas, such as in heat-resisting paint, for waterproofing, and even in pacifiers for infants.

Silicone resin possesses excellent heat and water resistance as well as adhesive ability, and therefore is frequently used in heat-resistant paint, which is applied on generators, boilers, chimneys, and is used in chemical and steel factories.

The heat-resistant paints found on the market are able to resist heat up to 600℃, and the heat-resistant paint appropriate for withstanding the working temperature of a specific painted structure can be chosen accordingly. Its hardening must follow the conditions listed in the product catalog. Painted film must be handled carefully to avoid being damaged during transportation.

Attention:

  • Painting should be carried out in normal temperatures. If the temperature of the painted structure is over 60℃, a blister surface or peeling off may result.
  • Both the primer and the topcoat should be painted a maximum of twice. If the thickness of the painted film is higher than 80μ, it may cause crevices and exfoliation. (When using no.1011 In-organic Zinc Rich Primer as the primer, it can be painted only once.)
  • After the work is done, the temperature of the heating process should gradually be raised to half of the required temperature of heat resistance. This temperature should be maintained for an hour, with the temperature then being raised to the required temperature of heat resistance. If the temperature is directly raised to the highest temperature of heat resistance, it will cause a blister surface and peeling off. Coating(Silicone Acrylic ) Silicone acrylic resin paint is made of special resin with in inorganic component. Combining the weather-resistant feature of the inorganic component and the high flexibility of organic polymer, it is compatible with both the inorganic and the organic resin. It can be repainted, and is ideal for treating metal, cement, and plastic. It has many characteristics not found in ordinary paints.

Silicone acrylic resin paint belongs to the two-pack paint, which means that the base and the curing agent must be mixed before being used. It can be applied with brush, air spray or airless spray.

Silicone acrylic resin paint is highly weather resistant, and its gloss-retention is close to that of fluorocarbon resin paint. Its excellent adhesion makes it adhere well to organic or inorganic substrate. Stains on painted surfaces can be easily removed since it is so highly pollution resistant, and is easy to use because of its safe and non-toxic features.

Anti-Fouling Marine Paint

In the subtropical zone, marine life grows easily and usually adheres under port facilities, ships, platforms, pipelines, and the cooling pipes of power plants. Such adhesive marine life will lower the speed of ships, increase fuel cost, and erode the ship plates.

The anti-corrosion paint or the antifouling paint is painted under the ship to prevent marine life from adhering and to save both fuel and sailing time.

Antifouling paint can be divided into the following categories:

  • Non-dissolving: Part of the film of this type will dissolve and cause a cellular-like film. Its antifouling performance is not good.
  • TIN Hydrolysis Self-polishing A/F: This type is made of organic tin resin and non-organic materials. Its film dissolves (hydrolysis reaction) in the water and equally releases its film with the water flow, which smoothes the surface, maintains the speed, and saves on fuel.
  • TIN-free Hydrolysis Self-polishing A/F: This type is made of organic synthesis resin and non-organic materials. Its film will dissolve in the water and equally releases its film with the water flow, which smoothes the surface, maintains the speed, and saves on fuel.