Two-component polyurethane for forms: review, features and reviews

Two-component polyurethane is a polymer which is made by mixing two ingredients. The first are isocyanate compounds, whereas the second can be a hydroxyl group. Elements interact, this results in a polymer with a polyurethane structure.

Varieties of polyurethane

To obtain the polymer it will be necessary to mix the curing agent and base in certain proportions. Two-component polyurethane may be represented by hot and cold kind of polymerization. The latest version of the material requires the effects of increased temperature, while the first polymerized at ambient temperatures.

Main features

The Described materials that are used for forms that have high strength characteristics, they are resistant to aggressive environments and the harmful effects, as well as elevated temperatures. All these features extend the field of use of polyurethane. It is suitable for the production of:

• Colors;
• Adhesives;
• Sealants;
• Varnishes.

After mixing the components, the composition acquires excellent flowability, which allows him to produce details on casting technology. As an example, it is possible to allocate bushings for machinery. In this article we are talking about the two-component polyurethane injection varieties. The material properties are determined by the initial components. An important part of the isocyanate hardener and base.

Additional features

Material Properties can vary depending on adding different substances, such as fillers and dyes. Some polyurethanes are replacing the tires, because have a high elasticity. You can find polyurethanes, which are able to restore the original shape when mechanical damage, this makes them especially valuable in the industry.

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Applications

Two-component polyurethane have found widespread today. Material is used for making jewelry, different mechanisms and castings of gears. Operational properties of the resulting parts is quite high. This allows the use of the material even in harsh conditions. As a result, possible to obtain a viscous, solid and chemically resistant parts. As the last can vystupat:

• Shesterni;
• Vali;
• Skewy;
• Kolesa;
• Roliki;
• Timing belt;
• Sealing elements;
• Protective coating
• Clutch;
• Piping
• The bearing parts;
• Sleeve.

The Details ready high-quality and long to serve, because they are resistant to wear and have high strength. Liquid stretch two-part polyurethane is the basis of wheels for trucks and loaders. As a result, possible to obtain products which are much more durable than rubber. They are ready to work even when damaged tread.

Material is the basis of the supporting and guide rollers which are operated in conjunction with a conveyor belt and conveyors. Items last much longer compared to rubber transmission belts, caterpillars and trucks.

The Material used for shock absorbers and sealing elements, because it has a higher resistance to wear and durability. That is why the rubber parts in recent times are increasingly being replaced by polyurethane. The elasticity remains at the same level. Two-component polyurethane casting has found application in the production of pipelines, which are characterized by chemical resistance and durability. The elements are solid. In addition, using the material to protect pipelines not only inside but also outside.

Feedback on additional areas of use

According to the consumers, two-component polyurethane is used in the manufacture of adhesives and paint products. The mixture after polymerization is robust to adverse external influences, strongly keeps for a long time and ready to serve. Liquid polyurethane is used especially in the manufacture of shapes that are executed by casting technology. Subsequently, these products are used for casting:

• Concrete
• Polyester resin;
• Wax.
• Gypsum.

According to consumers, a liquid two-component polyurethane is also used in medicine, where the material is the basis of removable dentures. Polyurethane is quite often used in the manufacture of jewelry. It is possible even to pour floors that are characterized by durability, wear resistance and high resistance to stress.

According to the consumers, in some areas of PU parts are superior to steel on a number of parameters. However, the production technology is much simpler, allowing you to get the miniature details and solid casting, the first of which can weigh no more than a gram, whereas the latter may have a mass of 500 kg andmore.

More about polyurethane for forms

Two-component polyurethane for making molds able to withstand a certain number of castings. If we are talking about the ordinary stamps, the casting of the stone can be 1,200 times the minimum. If in the process of production form was used the best materials and the requirements for the preparation of the mixture have been met, the form will be ready to withstand up to 4000 castings. This is true even for the case when form was confirmed by vacuum treatment, and was also used for filling is not very abrasive, corrosive and adhesive materials.

After Reviewing the range of international market, you will be able to understand that the polyurethane is today represented by several brands, among them are videliti:

• Vulkoprin;
• Vulkollan;
• Adiprene;
• Paramold.

If you prefer the Russian brand, you should choose a SIC-PU 5, SKU-PFL-100. They are made from polyesters of domestic production, but the quality is not worse than foreign analogues. Moreover, in some respects, they are leading.

Brand of polyurethane different chemical composition, amount of urethane groups, build chain of the polymer and molecular weight of the material. Properties can be adjusted by careful selection of raw materials. As a result, possible to obtain branched chains and cast polymers.

Additive to polyurethane for forms

Two-component polyurethane for forms can be supplemented with different substances, namely:

• Modifiers
• Toppings;
• Dyes.

They are necessary to improve the quality of the composition. For example, to speed up the reaction modifiers are used, which are added in small products. As for pigments, they are able to change the appearance of the element by the method of color correction. In order to reduce the plastic content, the use of fillers, which allow more and cheaper goods.

Fillers can be:

• Talc;
• Chalk;
• Carbon black;
• Chemical, glass, carbon fiber.

However, this list is not complete. Polyurethane molds for stone have a gradation of colour from light yellow to brown. If the use of special additives, it is possible to obtain almost any color.

Conclusion

Polyurethanes today has found its application in almost all industries. Used material in everyday life. As one of the promising directions is a liquid two-component polyurethane. Its use is simplified and accelerated work on the casting of concrete and plaster. With polyurethane it has become possible to manufacture small architectural forms, paving tiles and decorative elements in the home.