1248PP
Polyurethane Prepolymer
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Product Description
The 1248PP series is a range of polyfunctional, medium
molecular weight, MDI based polyurethane prepolymers with
terminal isocyanate groups.
Uses
The 1248PP series can be used in various sealing, priming and
adhesive applications, mainly in one pack products. Certain
members of the range are particularly suitable for use in the
manufacture of one component, moisture curable, flexible
concrete sealers. Other applications include primers of various
coating systems and sealers for other porous substrates.
Storage, Handling And Personal Protection
The recommendations in our Safety Data Sheet for this product
must be followed at all times. More general information is
included in our publication “A Guide to the Safe Handling of
Polyurethane Resins”.
Characteristics
As supplied the product has the following typical characteristics:-
| PRODUCT |
1248PP |
1248-50PP |
1248-40PP |
1248-30PP |
| Appearance |
Brown liquid |
Brown liquid |
Brown liquid |
Brown liquid |
| Viscosity Cp Max 25º C |
5,000 |
55 |
30 |
25 |
| Density @ 20º C |
1.11 - 1.13 |
0.97 - 0.99 |
0.98 - 0.95 |
0.92 - 0.96 |
| NCO Content % |
14.5 - 15.5 |
7.5 - 8.0 |
5.9 - 6.3 |
4.3 - 4.5 |
| Solids Content % |
99 min |
49 - 51 |
39 - 41 |
29 - 31 |
| Flash Point º C (Abel |
> 100 |
< 55 |
< 55 |
< 55 |
| Closed Cup) |
|
|
|
|
| Solvent |
None |
High flash |
High flash |
High flash |
| |
|
aromatic |
aromatic |
aromatic |
| Boiling Point º C |
> 200 |
150 |
|
|
| Vapour pressure mm Hg |
< 0.5 |
|
|
|
| Vapour Density (Air = 1) |
> 1 |
> 1 |
> 1 |
> 1 |
| Evaporation Rate |
< 0.1 |
< 1 |
< 1 |
< 1 |
| (BuAc = 1) |
|
|
|
|
| Solubility GOOD in mostcommon P/UGrade
solvents* |
*Polyurethane grade solvents by definition must have a low content of active hydrogens, therefore
alcohols and amines etc are not suitable along with other solvents containing > 0.05% water.
Notes.
The above systems are also available on special order in different solvents and in varying
concentrations.
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