type |
Blocked aromatic polyisocyanates based on toluene diisocyanate |
form of supply |
About 65% propylene glycol methyl ether acetate/xylene (1:1) solution |
use |
One-component baking coatings formulated with polyols or polyamines |
Product Specifications
characteristic |
Numerical value |
Units of measurement |
method |
Nonvolatile content (0.2g/60min/80℃) |
65±2 |
% |
DIN EN ISO 3251 |
Viscosity, 23℃ |
20,000±5,000 |
mPa·s |
DIN EN ISO 3219/A.3 |
Hazen color value |
≤150 |
|
DIN EN 1557 |
Free NCO Content (Revised) |
<0.2 |
% |
DIN EN ISO 11 909 |
other data*
characteristic |
Numerical value |
Units of measurement |
method |
Blocked NCO content |
about 4.8 |
% |
|
equivalent |
about 875 |
|
|
Flash point |
about 32 |
℃ |
DIN 53 213/1 |
Density, 20℃ |
about 1.1 |
g/ml |
DIN EN ISO 2811 |
*The above values are general information and are not part of the product specification.
Solubility / dilution
Desmodur® BL 1265 MPA/X generally has good miscibility with the following solvents, but the storage stability of the prepared solutions must be tested. Desmodur® BL 1265 MPA/X can be diluted with ethers, esters, ketones, aromatic solvents and turpentine. It has limited solubility with aliphatic hydrocarbon solvents. Polyurethane grade solvents should be used (less than 0.05 % water). These solvents should not contain reactive groups like hydroxyl and amino groups.
compatibility
Desmodur® BL 1265 MPA/X is generally compatible with Desmophen® 650, 651, 670, 680, 690, 800, 850, 1100, 1150, 1200, 1300, RD 181 in an equivalent ratio (NCO/OH=1.0). , A 365 and 1380 BT are miscible. Can also be mixed with various plasticizers and epoxy resins such as Laromin® C 260 (BASF), but the resulting mixture must be tested for compatibility.
Mixes with Desmodur BL 1100 and BL 1190, easily turbid, not always infinitely compatible.
Features/Applications
When used for crosslinking with polyols, Desmodur® BL 1265 MPA/X produces paint films with high hardness and good resistance to deformation, impact and chemicals. This product can be used for pipe inner coating, can coating and anti-stone chip primer surfacer. It can also be used in topcoat coatings that do not require high weather resistance.
Desmodur® BL 1265 MPA/X can also be used as an additive to improve the flexibility, abrasion, impact or chemical resistance of paint films such as coil coating primers, industrial decorative primers and stone-strike resistance Paint finisher. Another special application is the preparation of an anti-chipping primer primer for automobiles with Desmodur BL 1100 and Laromin C 260. Additions of 10-40% (BL 1265 : BL 1100 on a solid basis) increase film hardness and improve low temperature cracking resistance.
The best film can be obtained when Desmodur® BL 1265 MPA/X is mixed with Desmophen® series products according to NCO/OH=1. The dosage of Laromin C 260 should be determined empirically, and the optimum dosage is about 13%wt, based on the dosage of Desmodur® BL 1265 MPA/X. One-component systems based on Desmodur® BL 1265 MPA/X (with Desmophen or Laromin C 260) are stable at ambient temperature and 40°C. Desmodur® BL 1265 MPA/X can be mixed with pigments, fillers and auxiliaries using standard equipment. The dispersion temperature should not exceed 70°C. Storage stability is limited even for brief exposures above 80°C when the temperature exceeds 80°C. Crosslinking temperature depends on bake time and co-reactant. Baking conditions ranged from 150°C for approximately 30 minutes to those commonly used in coil coatings.
store
Desmodur® BL 1265 MPA/X should be stored in sealed original containers at room temperature. Under these conditions, the shelf life of this product is at least 6 months.
Safety: Hazard Identification
Flammable, harmful by inhalation and in contact with skin. There is a risk of inhalation of xylene and ethylbenzene through the skin.
The Safety Data Sheet (028472) must be strictly followed. It includes information on labelling, transportation and storage, as well as information on product use, product safety and ecology.
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