Modification of polyamide coating crosslinking agent

Modification of polyamide coating crosslinking agent, representative of low molecular weight polyamide crosslinking agent is V - 115, and V V - 125-125. They have good comprehensive performance, but the thermal deformation temperature remains to be further improved.

To this end, often to join a small amount (about 8% of the proportion of the crosslinking agent) m-phenylene diamine or 2 amino diphenyl methane, thermal deformation temperature 30 ℃ or so can be improved.

Research indicates that determined by amidation amine value degree and the ratio of epoxy resin, in keeping the crosslinking content flexibility and impact resistance at the same time, can increase its rigidity, heat resistance and chemical resistance. C20 long-chain unsaturated dibasic acid dimethyl and various diamine reaction, can be made into all kinds of polyamide. With the increase of the relative molecular mass, the tensile shear strength and peel strength also increase.

New type of epoxy crosslinking agent CY - F206, it is in the original alicyclic crosslinking agent may add some form strong hydrogen bonding material, and join amide group crosslinking agent of EPI - 3055.

EPI - 3055 do not contain active amine, low relative molecular mass and resin chain length, good wet bondability, good flowing property, can significantly improve the pigment wetting dispersibility, there will be no pigment flocculation and color separation, has the very good hardness and chemical character, suitable for epoxy self-leveling coatings.

In addition, Versamid224-229 series of modified polyamide and Aradur450 modified polyamide, all is will react with a small amount of epoxy resin, polyamide products to reduce free amine. When using don't have to cure, reduce CO2 in the air and into salt reaction, can the construction in cold climate.

Low molecular weight polyamide modified crosslinking agent. Use it made of epoxy polyamide coating has strong adhesion, aging resistance, water resistance and excellent resistance to chemical corrosion. According to introducing, the coating is widely used for ocean-going vessels hull paint, deck paint and chemical machinery, aircraft carrier aircraft track corrosion resistant paint, etc.

Crosslinking in addition, the preparation of the adhesives have good flexibility and low temperature after not brittle, in zong-han wu, such as: the development of epoxy resin coating of normal temperature cross-linking agent dynamic components such as plane, automobile and ship the coherence of alternative welding and riveting.

Hu high equality by low molecular weight polyamide with phenolic aldehyde amine compound to form a new crosslinking agent to crosslinked epoxy resins, on the one hand to enhance the reactivity of the polyamide, on the other hand to improve the flexibility and heat resistance properties of crosslinked content. Experiments show that polyamide and phenolic aldehyde amine compound works best when a ratio of 1:2.




Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine Uses:

The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.


Polyamide is ductile angular translucent or milk white crystalline resin, as the molecular weight polyamide engineering plastics, as a general rule, be 1.5 30000 polyamide has high mechanical strength, high softening point, heat resistance, low friction coefficient, wear resistance, self-lubrication, shock resistance and sound absorption, oil resistant, resistant to weak acid, alkali and solvents, good electrical insulation, self-extinguishing, non-toxic, odourless, good weather resistance, dyeing sex differences. Very good affinity with glass fiber reinforced polyamide.

The appearance of the polyamide for transparent or opaque white or yellowish aggregate, apparent cutin, hard products surface luster. The density of polyamide (density of crystalline phase and amorphous density and the density of general processing products) are not the same. Polyamide 6, polyamide 6 fi density is higher, with the molecular of central Asia and increased levels of methyl phthalein ammonia key - HCO (a) the content of reduced, to reduce the degree of crystallinity of polyamide, density decreases.

Is a kind of semi crystalline polyamide engineering plastics, there exists a crystalline and non-crystalline area. The proportion of call crystallinity crystal crystal area. The crystallinity of greater effects on the thermal properties of polyamide.

Processing conditions have certain influence to the crystallization of polyamide, injection molding, mold temperature is high, the melt cooling time is longer, the crystallinity of products is higher, and vice versa.

High degree of crystallinity of polyamide has great tensile strength, impact strength and thermal deformation temperature, but the molding shrinkage, elongation at break is smaller.

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Diethyl toluene diamine(DETDA)  http://www.yaruichem.com