China (Mainland)
STMMA copolymer for lost foam casting
- FOB Price: USD: 3.50-3.80 /Metric Ton Get Latest Price
- Min.Order: 1 Metric Ton
- Payment Terms: L/C,D/A,D/P,T/T,
- Available Specifications:
Good(0-1)Metric TonGood(2-5)Metric Ton
- Product Details
Keywords
- expandable polymer for LFC
- expandable polystyrene
- EPS beads
Quick Details
- ProName: STMMA copolymer for lost foam casting
- Appearance: Oyster white small beads
- Application: Lost foam casting pattern raw material...
- DeliveryTime: 10days
- PackAge: Steel drums
- Port: Shenzhen port
- ProductionCapacity: 500 Metric Ton/Month
- Purity: 100%
- Storage: clean,airtight container,put in a cool...
- Transportation: UN2211 and chemical dangerous grade 9
- LimitNum: 1 Metric Ton
- Chemical components: Styrene+MMA+ N pentane
Superiority
The STMMA is an expandable co-polymer resin beads developed by Castchem specially used for lost foam casting foundries. Compare with the conventional EPS, the carbon molecule content has been greatly reduced, in that cast the carburization problem in the casting will be reduced. Because the oxygen content of the STMMA improved to burn enough, the fold defects during the LFC process will be also reduced. Meanwhile, add the organic bromide as an additive will quickly reduce the molecular weight of polystyrene at elevated temperatures.
Details
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SPECIFICATIONS OF STMMA FOR LOST FOAM CASTING Chemical Dangerous Grade 9/ UN2211 American Patent:US 6770 681 B2 |
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Product |
Volatile level |
Moisture |
Beads size |
Density Suggestion* |
Suitable for castings with a min thickness of* |
Additives* |
Typical Applications* |
|
Name |
(by wt.) |
distribution peak |
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STMMA-1# |
≥ 7.0% |
≦0.6% |
600-900 µm |
18-20g/L |
6~9mm |
Yes |
Aluminum,copper alloy,grey iron,nodular iron,alloy steel,mild steel and stainless steel |
|
STMMA-2# |
≥ 7.0% |
≦0.6% |
450-600 µm |
19-21g/L |
4.5~6mm |
Yes |
|
|
STMMA-3A# |
≥ 7.0% |
≦0.6% |
400-550 µm |
20-22g/L |
4.5~6mm |
Yes |
|
|
STMMA-3# |
≥ 7.0% |
≦0.6% |
350-500 µm |
21-23g/L |
3.5~5mm |
Yes |
|
|
STMMA-4# |
≥ 7.0% |
≦0.6% |
250-350 µm |
23-26g/L |
2.5~3.5mm |
Yes |
|
|
STMMA-FD special |
≥ 5.5% |
≦0.6% |
900-1250 µm |
17-19g/L |
9~12.5mm |
Yes |
Aluminum alloy,grey iron |
|
STMMA-FD1# |
≥ 5.5% |
≦0.6% |
600-900 µm |
18-20g/L |
6~9mm |
Yes |
|
|
STMMA-FD2# |
≥ 5.5% |
≦0.6% |
450-600 µm |
19-21g/L |
4.5~6mm |
Yes |
|
|
STMMA-FD3# |
≥ 5.5% |
≦0.6% |
350-450 µm |
21-23g/L |
3.5~5mm |
Yes |
|
|
STMMA-FD4# |
≥ 5.5% |
≦0.6% |
250-350 µm |
23-26g/L |
2.5~3.5mm |
Yes |
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* Density suggestion is a function of utilities and expander capabilities; the above values represent optimum expansion conditions. |
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*The select of beads size shall be according to the min thickness of the casting wall, used to be 1/10 of it. For example, you could choose the 700 µm szie beads if the casting's thinnest wall is 7mm. If the casting needs a high precision, it can also choose the next small class. |
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*Contains an additive which quickly reduces the molecular weight of polystyrene at elevated temperatures. Recommended for applications in aluminum having fold defects and applications in iron having excessive lustrous carbon in castings. |
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*Typical Application means we have tested in this kind of metal, metals beyond that are according to be actually used. |
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