Copolymer of STMMA
Expandable Styrene/MMA
copolymer beads
castchem
• STMMA is through Styrene and methyl methacrylate polymer onestep polymerization generated. These products are really have
application in lost foam erea.
• STMMA’s carbon usually ≤ 0.06%, carburetting defects much less
than EPS.
• Best use date in three months on 25℃ normal temperature.
Diameter
Add carbon
Applicable
scope
EPS
≥0.9mm
≥0.1%
Gray iron,
aluminum alloy
STMMA
0.25~0.9mm
≤0.06%
Ductile iron ,
steel castings,
gray iron
Diameter classification table
Specifications
Diameter
STMMA-1#
0.60~0.90mm
STMMA-2#
0.45~0.60mm
STMMA-3A#
0.40~0.55mm
STMMA-3#
0.35~0.50mm
STMMA-4#
0.25~0.35mm
Proportion table
Standard
STMMA-2#
STMMA-3A#
STMMA-3#
STMMA-4#
Proportion
19~21g/L
20~22g/L
21~23g/L
23~26g/L
Difference of STMMA and EPS
• By STMMA is composed of methyl methacrylate and styrene.
• Compared with EPS, STMMA series foamable copolymer resin
beads have much excellent casting performances:
Reducing carbon defect of castings;
Reducing carburization defect on surface of steel castings;
Reducing smoke carbon;
Improving surface finish of castings.
Expansion curve graph on 105℃
The relation bewteen model shrinkage and
temperature
Our new product for Aluminum
alloy casting---FD
• EPS is extremely backward, we won't say
it again. Our factory developed specifically
to adapt to the aluminum alloy casting
product---FD, it burns more fully than EPS,
Carbon defects was less, foaming
proportion lighter, only half price of the
STMMA.
Burning
contact
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Add:148#Zhang jia dun road,Tangqi, Hangzhou, China.
Post code: 311106
Mob:+0086-18868775688
Tel:+0086-571-89021292
Fax: +0086-571-86381739
Email: [email protected]
Http: www.china-castchem.com
Complaints Email: [email protected]