Toluene diisocyanate manufacturer Knowledge Covestro Desmodur BL3370 MPA low temperature sealing curing agent

Covestro Desmodur BL3370 MPA low temperature sealing curing agent

Covestro Desmodur BL3370 MPA low temperature sealing curing agent

                               

Type

based on Blocked Polyisocyanate of Hexamethylene Diisocyanate

Form of Supply

in 1-Propylene glycol methyl ether acetate-2MPA) about 70%

Purpose

with Desmophen®Mixed products of various grades have high resistance to heat and yellowing, high light resistance A one-component baking urethane coating; as an additive to conventional stoving lacquer coatings to improve reactivity, flexibility and adhesion

Specifications

Features

Value

Measurement unit

Method

Content of non-volatile components (1g/60min/80°C)

70±3

%

DIN EN ISO 3251

Viscosity,23°C

38500 ± 1 200

mPa·s

DIN EN ISO 3219/A.3

Color value(Hazen)

60

DIN EN 1557

Other data*

Features

Value

Measurement unit

Method

closedNCOcontentContent span>

about8.9%

Viscosity,25°C

about3200

mPa·s

DIN EN ISO 3219/A.3

equivalent

about470

Flashpoint

about49

°C

DIN 53 213/1

Density

about1.08

g/cm3

DIN EN ISO 2811

*This data is general information , are not part of the product specification.

Solubility/Dilution
Desmodur ® BL3370 MPA can use esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, propylene glycol methyl ether acetateester, acetone, butanone, methyl Isobutyl ketone, cyclohexanone, toluene, xylene, solvent naphtha 100, 150, 200S and thisA mixture of some solvents. However, the stability of the resulting solution still needs to be tested. Aliphatic hydrocarbons are not suitable as solvents. Desmodur® BL3370MPA cannot be diluted below 40% solids. Long-term storage of solutions with low solid content may cause turbidity and precipitation.

Compatibility
etc. When equivalent cross-linking reaction, Desmodur® BL 3370MPA is compatible with the following products: Desmophen® 651, 670, 680, 690, 800, 1100, 1300, RD181 , A160, A365, A450 and Desmophen® T1665. The compatibility of the mixture must always be checked.

Features/Applications
Desmodur ® BL3370 MPA mixed with polyols to prepare lightfast one-component polyurethane baking varnish coatings. This product is mainly used inHigh grade industrial topcoat (can/coil) and automotive OEM primer. Desmodur® BL3370 MPA is also availableAs an additive added to the traditional baking system to enhance its flexibility and adhesion.
typical The baking conditions are as follows:

100°C 50 minutes
or 120°C for 20 minutes
or 160°C for 7 minutes

Yellowing may appear at 160 °C above, mainly depends on co-reactants used and bake time. When using coil coating, sufficient crosslinking was achieved at a maximum plate temperature (PMT) of approximately 216°C. It is not necessary to add a catalyst to Desmodur® BL3370 MPA.

Save
Desmodur ® BL3370 MPA should be stored in airtight containers. Under proper storage conditions at room temperature, this product has a shelf life of at least 6 months.

Safety: Hazard Identification
Flammable, eye irritating, product safety data sheet should be strictly followed ( 300202). It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

tyle="background-color:#ffffff">         100°C 50 minutes
or 120°C for 20 minutes
or 160°C for 7 minutes

Yellowing may appear at 160 °C above, mainly depends on co-reactants used and bake time. When using coil coating, sufficient crosslinking was achieved at a maximum plate temperature (PMT) of approximately 216°C. It is not necessary to add a catalyst to Desmodur® BL3370 MPA.

Save
Desmodur ® BL3370 MPA should be stored in airtight containers. Under proper storage conditions at room temperature, this product has a shelf life of at least 6 months.

Safety: Hazard Identification
Flammable, eye irritating, product safety data sheet should be strictly followed ( 300202). It includes relevant information such as labeling, transportation and storage, as well as relevant information on product use, product safety and ecology.

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