Covestro Desmodur Z4470 MPA/X IPDI trimer curing agent wear-resistant fast-drying curing agent
|
type |
Aliphatic polyisocyanates based on isophorone diisocyanate |
|
form of supply |
About 70% in propylene glycol methyl ether acetate/xylene, 1:1 |
|
use |
Used as a co-reactant in alkyd spray coating formulations and as a hardener component in light and weather resistant coating systems |
Product Specifications
|
characteristic |
Numerical value |
Units of measurement |
method |
|
Isocyanate content |
11.8±0.4 |
% |
DIN 53 185 |
|
Non-volatile component content (0.2g/1h/120°C) |
70.5±1.5 |
% |
DIN 53 185 |
|
Viscosity, 23°C |
1600 ± 700 |
mPa·s |
DIN 53 019/1 |
|
Color value |
≤60 |
|
DIN ISO 6271 |
|
Diisocyanate monomer content |
<0.5 |
% (by weight) |
DIN 55 956 |
Other data*
|
characteristic |
Numerical value |
Units of measurement |
method |
|
equivalent |
about 360 |
|
|
|
Flash point |
40 |
°C |
DIN 53 213/1 |
|
Density@20℃ |
1.18 |
g/cm3 |
DIN 53 217/3 |
*The above values are general information.
Solubility/Dilution
Generally speaking, Desmodo Z4470 has good compatibility with the following solvents. However, their solutions must be tested for storage stability. Desmodo Z4470 is fully soluble/dilutable in aromatic compounds, even without the addition of polar solvents such as esters, ketones and ether esters such as butyl etherate, methyl ethyl ketone and propylene glycol methyl ether acetate. Dilute the product in the above supply form to a stable solvent with a minimum solids content of 20% with, for example, xylene, toluene, a higher boiling aromatic compound such as Solvent Gas 100 or a fragrance blend. However, their solutions must be tested for storage stability. Do not add aliphatic compounds if the storage time of the diluted solution is to be prolonged. However, Desmodo Z4470 has the necessary compatibility to be added to coatings that dissolve in aliphatic compounds. Solvents used must be polyurethane grade solvents (< 0.05% water). Solvents must not contain active genes such as hydroxyl or amino groups.
compatibility
In general, Desmophen Z4470 is usually mixed with the Desmophen® grades listed below. However, the compatibility of the mixture must be tested. Desmodos Z4470 is miscible with Desmodos N75, N33900, and L, and with most polyester Cedrus grades such as Desmodos 650, 651, 670, 680, 690 and RD 181 It is also miscible with the acrylates Ketex Model A 160, A 265, A 365, A450, A 565 and A 665, as well as with many alkyd resins.
application
Desmodo Z4470 is mainly used as an additive resin in the alkyd resin spray coating to be applied, which can speed up drying, curing and chemical cross-linking, and at the same time, the performance should improve the resistance and other properties of the paint film. The optimum addition amount must be determined experimentally.
As for alkyd resins dried by oxidation (alkyd resins modified with fast drying oils or fatty acids), the result is an additive crosslinking process similar to that of oxidative crosslinking. Due to its hard resin properties, Desmodo Z4470 improves physical drying, curing and chemical drying of paint films. The product must be added in the exact predetermined quantity for use as a special spray solution. Typically formulated paint formulations have a working life of one business day. Weather resistance and yellowing resistance are basically determined by the alkyd resin. With Desmodo Z4470 and a flexible co-reactant, such as Desmodo 670, two-component polyurethane coatings with good weatherability can be formulated.
store
Desmodur Z4470 is sensitive to moisture. Therefore, it should be stored in an airtight container. This product is stable for at least half a year if stored under appropriate conditions.
