Active Member
|
[China]
Address: No.166,Zhengyang Middle Road,Chengyang District,Qingdao, China. 266000
Contact name:louis.liu
Qingdao Exceed Fine Chemicals Co.,Ltd |
|
|
Polyurethane Casting Resin
for Concrete Moulding
1. Introduction
It is a double component polyurethane resin including part A and B.
A is polyol and B is prepolymer ended capping with isocyanate.
2. Application
It is special for casting concrete moudling. It is a substitution
of silicone rubber making mould for “cultural stone”. It also
applies to make electrical equipment potting, rubber roller, rubber
plates, rubber wheels, shoe models and other wares.
3. Characteristics
It has excellent processing properties, solidification in common
temperature, short time of demould, and regulating colors by adding
pigment. The ware has good properties of abrasive resistance,
waterproof, transparent, good elastic, and stable dimension.
4. Physical properties
Hardness | Shore A80±2 at room temperature |
Tensile strength (MPa) | 10 |
Elongation at break (%) | 500-700 |
Tear strength/ (kN/m) | 40 |
Rebound / % | 50 |
Specific gravity (25℃, g/cm3) | 1.10 |
5. Handling properties
| Type | Appearance | Viscosity (30℃,MPa.S) |
EX3800-A | Light yellow liquid | 750±100 | |
EX3800-B | Colorless or light yellow transparent liquid | 1500±150 | |
Mixing ratio A:B (by weight) | A/B=100/100 | ||
Gel time (@30℃) | 6-15 minutes(variable) | ||
Demould time | *Note 1 | ||
Cure schedule | 7 days ambient; or demould with post cure of 12 hours @100-120℃ is recommended to promote maximum physical properties as given above | ||
*The gel time can be regulated by catalyst*
6. Storage
Store both components A and B at 20-25℃. Keep the packing tightly
in sealed container. If you can’t us it up at one time, please fill
nitrogen gas and then seal it.
7. Shelf life
If stored under the above conditions the rein will have a shelf
life of 6 months, from the date of production.
8. Packing
20kg or 200kg per iron drum
