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Polyurea is an elastomer substance formed by the reaction of isocyanate component and amino compound component. Divided into pure polyurea and semi-polyurea, their performance is different, the most basic characteristics of polyurea are anti-corrosion, waterproof, abrasion resistance, etc.A class of compounds produced by the reaction of isocyanate components with amino compounds. The isocyanate component can be monomers, polymers, isocyanate derivatives, prepolymers, and semi-prepolymers.
Polyurea is a carbonic acid polyamide, which is equivalent to a polyester whose polycarbonate is carbonic acid. The urea group is more polar and can form more hydrogen bonds. Therefore, the melting point of polyurea is higher than that of the corresponding polyamide, and the toughness is also greater, which is suitable for textile fibers.
The best way to synthesize polyurea is to refer to the synthesis method of polyurethane, that is, the reaction of diamine and diisocyanate. The exothermic reaction can be dissipated by solution polymerization or interfacial polymerization. Because it is a gradual addition reaction, there are no side reactions, and the polymerization process is relatively simple. For example, the melting point of polyurea made of 2,4-toluene diisocyanate and 4,4'-diaminodiphenyl ether is as high as 320°C.
Polynonylidene urea is a representative polyurea polymer. It is prepared by condensation of nonanediamine and urea. Its properties are similar to polyamide (such as nylon 6). It can be melt-spinned. The melting temperature is 230ºC~235ºC, the density is small (1.066 g/cm3), and it has good resistance. Heat resistance, dyeability and corrosion resistance, fiber tensile strength 0.0441~0.0539 Newton/denier, elongation rate 23%, suitable for making fishing nets and knitwear.
Polyurea is extremely versatile. Its application areas are as follows: concrete protection accounts for 60%, truck wear-resistant lining accounts for 15%, steel structure anticorrosion accounts for 10%, roof waterproofing accounts for 10%, and others account for 5%.
As a protective technology, polyurea technology is mainly used in four fields: waterproof, anti-corrosion, anti-washing and surface decoration. For example, the application of polyurea in the pipeline anti-corrosion region, pipeline anti-corrosion is also the field where polyurea technology has entered the earliest and the largest engineering application. Applications in other fields also include steel structure anti-corrosion (especially anti-corrosion of wharf steel piles), elastic anti-collision materials (offshore buoys, guard strings), nuclear power plant protection, national defense industry (tank chassis, bullet-proof helmets), swimming pool facilities, etc.
Basic Info.
Method Spray Level Finish Coat Drying Method Air Drying Certification ISO14001, CCC Substrate Ceramic Components Solvent Formation Mechanism Conversion Type Trademark OEM Transport Package Barreled Specification 200kg Origin China HS Code 3926909090Product Description
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Polyurea is an elastomer substance formed by the reaction of isocyanate component and amino compound component. Divided into pure polyurea and semi-polyurea, their performance is different, the most basic characteristics of polyurea are anti-corrosion, waterproof, abrasion resistance, etc.A class of compounds produced by the reaction of isocyanate components with amino compounds. The isocyanate component can be monomers, polymers, isocyanate derivatives, prepolymers, and semi-prepolymers.
Polyurea is a carbonic acid polyamide, which is equivalent to a polyester whose polycarbonate is carbonic acid. The urea group is more polar and can form more hydrogen bonds. Therefore, the melting point of polyurea is higher than that of the corresponding polyamide, and the toughness is also greater, which is suitable for textile fibers.
The best way to synthesize polyurea is to refer to the synthesis method of polyurethane, that is, the reaction of diamine and diisocyanate. The exothermic reaction can be dissipated by solution polymerization or interfacial polymerization. Because it is a gradual addition reaction, there are no side reactions, and the polymerization process is relatively simple. For example, the melting point of polyurea made of 2,4-toluene diisocyanate and 4,4'-diaminodiphenyl ether is as high as 320°C.
Polynonylidene urea is a representative polyurea polymer. It is prepared by condensation of nonanediamine and urea. Its properties are similar to polyamide (such as nylon 6). It can be melt-spinned. The melting temperature is 230ºC~235ºC, the density is small (1.066 g/cm3), and it has good resistance. Heat resistance, dyeability and corrosion resistance, fiber tensile strength 0.0441~0.0539 Newton/denier, elongation rate 23%, suitable for making fishing nets and knitwear.
Polyurea is extremely versatile. Its application areas are as follows: concrete protection accounts for 60%, truck wear-resistant lining accounts for 15%, steel structure anticorrosion accounts for 10%, roof waterproofing accounts for 10%, and others account for 5%.
As a protective technology, polyurea technology is mainly used in four fields: waterproof, anti-corrosion, anti-washing and surface decoration. For example, the application of polyurea in the pipeline anti-corrosion region, pipeline anti-corrosion is also the field where polyurea technology has entered the earliest and the largest engineering application. Applications in other fields also include steel structure anti-corrosion (especially anti-corrosion of wharf steel piles), elastic anti-collision materials (offshore buoys, guard strings), nuclear power plant protection, national defense industry (tank chassis, bullet-proof helmets), swimming pool facilities, etc.
