Aziridine crosslinking agent is an important chemical with wide applications in multiple fields. The following is a detailed introduction about aziridine crosslinking agent:
1、 Definition and Structure
Aziridine crosslinking agent, as a special crosslinking agent, has good crosslinking performance, can be miscible with water and various organic solvents, and can also react in a dry state. Its structural formula is usually C24H41N3O6 (refer to Article 2).
2、 Physical properties
Aziridine crosslinking agents typically appear as colorless to pale yellow liquids with a solid content greater than 99%, and have low viscosity (typically 180-220mPas at 25 ℃) and a suitable pH value (8-10.5). In addition, its freezing point is about -15 ℃, and its boiling point is much higher than 200 ℃ (polymerization). This crosslinking agent can be completely dissolved in common solvents such as water, alcohols, ketones, esters, etc. (refer to Articles 3 and 4).
3、 Chemical properties and applications
Crosslinking reactionAziridine crosslinking agent can react with carboxyl groups at room temperature, making it an ideal crosslinking agent for carboxyl containing systems with multifunctionality. It can also undergo cross-linking reaction with amino groups under strong acid catalysis (refer to articles 3 and 4).
application area ：
Coatings and CoatingsAziridine crosslinking agent can significantly improve the water resistance, chemical resistance, dry wet friction resistance, surface anti adhesion, and adhesion of coatings on special substrates (refer to Article 1). It is widely used in water-based wood coatings, leather coatings, textile printing adhesives, and other fields.
Adhesive and sealantIt can improve the cohesion of water-based adhesives, solve the problem of residual adhesive on the substrate of protective films, and enhance the water resistance of water-based sealants and the cohesion of cement strips (refer to Articles 1 and 5).
printing inkAziridine crosslinking agent can improve the water resistance, wet abrasion resistance, and printability of water-based inks (refer to Articles 1 and 5).
otherIn vinyl coatings, aziridine crosslinking agents can reduce the mobility of plasticizers and improve stain resistance; In water-based industrial paint, its water resistance, alcohol resistance, and adhesion resistance can be improved (refer to Articles 1, 3, 4, and 5).
4、 Usage and Storage
The dosage of aziridine crosslinking agent is usually 1% -3% of the solid content of acrylic acid or polyurethane. It can be cured at room temperature or by heating and baking. When in use, it should be slowly added to the evenly stirred coating system (refer to Articles 3 and 4). During storage, the product should be stored in a dark, dry and ventilated room temperature environment. Once the barrel is opened, it should be closed as soon as possible to avoid gel caused by contact with air (refer to article 1).
5、 Security Information
Although aziridine crosslinking agent is an environmentally friendly crosslinking agent that releases no formaldehyde or other substances after crosslinking, it is only used in industrial production. Industrial producers should wear specialized masks or operate in upwind areas to avoid skin and eye contact. If there is any discomfort, immediately rinse with clean water and seek medical attention (refer to Article 1).
6、 Summary
Aziridine crosslinking agent plays an important role in various industries such as coatings, coatings, adhesives, inks, etc. due to its excellent crosslinking performance and wide application fields. At the same time, its environmental friendliness and formaldehyde free characteristics also meet the environmental requirements of modern industrial production.
