hdi low viscosity tpa-100
Date：2023-10-20 Categories：News
type :
aliphatic polyisocyanate (hdi trimer)
features:
# high nco content
# lower viscosity
# good coated film appearance
# good weather resistance
# low residual monomer
applications:
# two-component applications# plastic coatings# auto refinish coatings
# automobile, motorcycle ; base coat and top coat# heavy duty coatings
typical properties：
appearance
|
colorless to slightly yellowish clear liquid
|
non-volatile
|
100 wt%
|
solvent
|
none
|
nco content
|
23.1 wt%
|
viscosity
|
1400 mpa .s at 25°c
|
color value
|
<1 (gardner)
|
nco equivalent weight
|
approx.182
|
flash point
|
252°c
|
density at 20°c
|
1.17
|
these values provide general information and are not part of the productspecifications.
stability / thinnability:
duranatetm tpa-100 can be thinned with esters,
ketones and aromatichydrocarbons such as ethyl acetate, butyl acetate, methoxypropylacetate(pma), methylethyl ketone, methyl-butyl ketone, cyclohexanone,toluene, xylene, solvesso #100 andmixture thereof. generally speaking, it has good compatibility with thesolventmentioned. however, the solutions formed must be tested for their storage stability.only pu grade solvents can be used (max. 0.05% water, absence of reactive groupssuch as hydroxyl or amines groups). aliphatic hydrocarbons such as hexane.cyclohexane, methylcyclohexanes and mineral spirits, are unsuitable as solventsbecause of their poor solubility.
duranatetm tpa-100 should not be thinned to below a solid content of 40%.prolonged storage of solution with lower solid content may result in turbidity andsedimentation.
compatibility:
mixing ratio of duranatetm tpa-100 with polyols is based on nco/oh equivalentratio of 1/1.
storage:
duranatetm tpa-100 is sensitive to moisture and should therefore always be storedin sealed containers.
characteristics of iscosity:
weatherability:
fig-3. weatherability of duranatetm tpa-100 with acrylic polyol
polyol; setalux 1198 & 1753 (nuplex resins)weathered by super-xenon weathermeter
