Coating with crosslinking agent

Coating with crosslinking agent, effective crosslinking density refers to the curing film forming part 3 d mesh crosslinking density with molar says (where the unit is 0, 001 mol/g). Because of the high density film against water, solvent resistance, chemical resistance is better.

Tell commonly crosslinking density is proportional to the baking temperature and time, between Tl and T2 temperature range of effective crosslinking density is relatively feasible.

With octanol modified melamine is desirable, but must be high temperature drying, modified melamine flow smooth level is quite good.
With ethanol modified melamine, mainly for the cathode electrophoresis paint.

Not certain with isobutyl alcohol ether dry quickly, because of isobutanol supply abundant, the price also cheaper.

Butanol etherified urea-formaldehyde resin, used in research can be observed in the infrared spectrum of structure change, in the film 200 ℃ when ether bond is obviously reduced, urea molecules beginning decomposition, decomposition is faster at 250 ℃.

Ding etherification melamine at above 200 ℃, ether bond was observed by infrared spectrum, three ring at 300 ℃ starts to break down.
Melamine etherification has broad mixing solubility, high dry ether degrees and long oil alkyd mix good solubility, low degree of ether and short oil dry alkyd immiscible sex is bad. Generally speaking, a good solubility, good stability, good film gloss, curing slower. Sometimes in order to reduce costs, melamine and urea formaldehyde can be mixed use.

PVC (CPVC) and critical pigment volume. When makings gradually added to the dye, the makings are dye particle surface adsorption, and pigment particles of air has been replaced with the basic material of surface gap, with the continuously to join, pigment particles gap shrinking makings completely covered the surface of pigment particles and just fill all voids of pigment volume concentration is defined as the critical pigment volume concentration, with CPVC said.

PVC had a great influence on the coating performance:

PVC > CPVC, pigment particles is not fully wetting, gap exists in the pigment mixed with the makings of the system;

PVC (CPVC, pigments in the form of separation exists in the binder phase;




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.


PVC, near the CPVC paint film of the nature of the mutation will occur.

Crosslinking agent used in pigment pad dyeing process has two kinds, one kind is 2 d resin, its usage in about 20 g/L, need by joining curing catalyst sessile; Another is EH and FH resin, belongs to the cationic crosslinker, its dosage in 2 ~ 5 g/L, but the working liquid preparation stability is poorer, prone to dye condensation and produce color points, can't take one bath dyeing process for light products, and for dyed dark products, because of the color point can be certain to cover up, normally won't have too much of a negative effect on the fabric.

Adding foaming agent and foam is printed in the printing ink thermoplastic resin, after high temperature baking, releasing the gas, the decomposition of foaming agent for printing slurry expansion to form a stereoscopic pattern, and fixation through resin, to paint and make the fabric with FuDiaoGan decorative pattern.

Coating of foam printing paste is made up of the water phase adhesive, foaming agent, stabilizer, crosslinking agent, paint, etc. Foaming agent sodium lauryl sulfate are available, and stabilizing agent, appropriate USES ammonium stearate, lauryl alcohol or lauryl alcohol, etc. Adhesives available poly acrylic acid, acrylic acid copolymer, hydroxyethyl cellulose, sodium alginate and cellulose derivatives. Of hydroxyethyl cellulose and improve the effect of foam stability, it sometimes can no longer add glue.

Foam printing is the key to make good bubble paste foaming ratio, the thick fabric such as general printing towel, pillow towel, foaming ratio is 1; (4 ~ 5), print the thin fabrics such as pure silk, polyester/cotton, foaming ratio is 1: (6 ~ 7), the foam slurry preparation should be placed after the shade, prevent the environmental temperature and foam system, to prevent surface crust. The foam slurry preparation and do not add water, otherwise it will destroy the foam stability, also not to be exposed to acid, alkali, alcohol and other substances, so as to avoid bubbles are destroyed.

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