Factory sales expandable polymeric beads Sheet Sandwich Panels STMMA Slab board for Lost form casting
The Advantage of using the STMMA instead of EPS
Pure EPS: 100% polystyrene, pentane7%
STMMA-FD:90%polystyrene+10%MMA, pentane>7%
Decomposition and gasification chemical formula when pouring metal melt:
EPS: C8H8=8C+4H2
STMMA:C5O4H8=3C+2CO2+4H2
From the formula, you will see why residues are more in EPS. And whatever additive you added to EPS, it wont change the main formula.
Formula Solutions:
1.) STMMA series are focused on carbon rising defect in castings and with less residues, low dissolution temperature
2.) The STMMA-FD series have great advantages in solving fold defect by aluminum casting and applications in iron castings having excessive lustrous carbon, porosity defect solved.
*Typical Application means we have tested in this kind of metal, metals beyond that are according to be actually used.
Product Name: STMMA Co-polymer Resin Beads Expandable
Chemical components:EPS+PMMA
STMMA is Specifically designed for lost foam casting by CastChem.
*Each of the above products is available in 25kgs bags or 125kgs drums.
The Castchem STMMA Formulation VS EPS for Lost Foam
*CastChem developed 20 years ago an advanced casting formulation STMMA for Lost Foam, and it had been granted an American patent.
*CastChem developed STMMA-FD formulation in 2016, specially used for aluminum lost foam cast, also with a relatively low price that easy to be accepted by the foundries.
*CastChem's STMMA series contains less carbon molecules than EPS, so it can reduce or eliminate fold defects and excessive lustrous carbon in castings which has been proved by our users in China and American such as BMW,GM,and Anhui QuanChai Engine.
Lost Foam Advantages vs Traditional Casting
*Lost Foam Casting is particularly used for very complex casting. This process eliminates cores and parting lines.
*Lost Foam also improves accuracy in sizing, Casting walls can be curved or of variable thickness.
*Lost Foam casting is cost effective because it does not need as much machining as traditional casting.
Lost Foam Casting made by STMMA-FD
IMPORTANT:
The products sold by CASTCHEM must be in strict accordance with the law of the People's Republic of China,users should make their own independent determination that the product is suitable for the intended use and can be used safely and legally.SELLER MAKES ON WARRANTY;EXPRESS OR IMPLIED(INCLUDING AND WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE)OTHER THAN AS SEPARATELY AGREED BETWEEN THE PARTIES IN WRITING.
Methyl Hydrogen silicone Fluid 202
Chemical name:Polymethylhydrosiloxane CAS no:63148-57-2
Product performance
Favorable film-forming property;
It reacts with HO or R-OH and gives off H2 under the condition of existence of alkali or lewis acid;
It reacts with alkenyl compounds easily under the condition of existence of Pt-Cr compounds;
When Tï¹¥50, it reacts with compounds with epoxy group;
Main uses
1. Antifouling, oil-proofing and water-proofing agent for ceramics
2. Important intermediate for synthesizing modified silicone oils and silicone rubber
3. Water-proofing agent and softening agent for natural and synthesizing fiber fabrics, silks, and leathers
4. Water-proofing agent and anti-sticking agent for paper
5. Softener for glass fiber
6. Water repellent agent and lubricant for cosmetics.
Packing, storage, and transportation:
The product is packed by 100kg or 200kg plastic drum, , or 5kg, 20kg, or 50kg PE plastic drum.
Keep in clean and closed container
Keep in cool and dry place. To protect from direct sunlight. Shelf life is half a year.
To transport as non-dangerous products.
IMPORTANT:
The products sold by CASTCHEM must be in strict accordance with the law of the People's Republic of China,users should make their own independent determination that the product is suitable for the intended use and can be used safely and legally.SELLER MAKES ON WARRANTY;EXPRESS OR IMPLIED(INCLUDING AND WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE)OTHER THAN AS SEPARATELY AGREED BETWEEN THE PARTIES IN WRITING.
