CAS 108-78-1 PH 7.5 Value Melamine Raw Material UF Urea Formaldehyde Powder
Industry Base Urea Molding Compound Raw Material
what is Urea formaldehyde
Urea formaldehyde is a translucent thermosetting resin made by heating urea and formaldehyde in ammonia or pyridine solution. It is widely used as a component of molding materials, adhesives and protective topcoats.
The fiberboard industry is a big consumer of resin, where it is used as an adhesive. Although it has many advantages, it can still release formaldehyde gas under certain conditions. These resins can be used as viscous
liquids or spray-dried powders, and water needs to be added before use.
The English abbreviation UF. Cross-linking occurs during processing and molding, and the product is an insoluble and infusible thermosetting resin. The cured urea-formaldehyde resin is lighter in color than phenol-formaldehyde resin,
translucent, resistant to weak acids and weak bases, good insulation performance, excellent abrasion resistance, and low price. Urea and 37% formaldehyde aqueous solution can be polycondensed under the catalysis of acid or alkali
The linear urea-formaldehyde oligomer is obtained, which is industrially used as a catalyst to react at about 95°C, and the molar ratio of formaldehyde/urea is 1.5 to 2.0 to ensure that the resin can be cured.
It has the characteristics of good insulation, high strength, wear resistance, heat resistance, safety, good gloss, bright color, weak alkali resistance, acid resistance, and no discoloration after long-term use.
|
Index |
Unit |
Type |
Testing Method |
|
|
|
|
A- |
|
|
|
1 |
Appearance |
|
After molding, the surface should be flat, shinny and smooth, no bubbles or crack, color and foreign material achieves standard. |
|
|
2 |
Resistance to boiling water |
|
No mushy, permit little color fade and purse |
GB13454 |
|
3 |
Volatile matter |
%,≤ |
4.00 |
GB13455 |
|
4 |
Water absorb (cold) |
mg, ≤ |
100 |
GB1034 |
|
5 |
Shrinkage |
% |
0.60-1.00 |
GB13454 |
|
6 |
Distortion Temperature |
°C≥ |
115 |
GB1634 |
|
7 |
Fluidity |
mm |
140-200 |
GB13454 |
|
8 |
Impact Strength (notch) |
KJ/m2, ≥ |
1.8 |
GB1043 |
|
9 |
Bending Strength |
Mpa, ≥ |
80 |
GB9341 |
|
10 |
Insulation Resistance after 24h in water |
MΩ≥ |
104 |
GB1410 |
|
11 |
Dielectric strength |
MV/m,≥ |
9.0 |
GB1408 |
|
12 |
Baking Resistance |
GRADE |
I |
GB2407 |
Packing and shipping
Packing: White box, Color box, Brown box , it all depends on customer's requirements.
Delivery time: 15-25 days based on MOQ.
Payment term: T/T, Western Union, Paypal, LC at sight.
Shipping Type: FOB/CIF by Sea/Air, Express etc.
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