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Silicone M4630 Food and concrete A+B
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Germany
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Two-component silicone with polyaddition cross-linking. Heat resistant up to 250 °C. Component A (900 g) + component B (100 g). Food-safe. For the production of flexible moulds for food processing, also for baking moulds.
The silicone M4630 A+B is suitable for contact with food, is FDA-compliant and fulfils the BfR recommendations. M4630 can therefore be used to produce moulds for foodstuffs. Silicone moulds made from M4630 are also heat-resistant up to around 250 °C and can therefore also be used as baking moulds up to this temperature.
The silicone has very good flowability and hardens quickly at room temperature with virtually no shrinkage. The curing process can be significantly accelerated by applying heat. Moulds made from M4630 are characterised by a low Shore A hardness and high tear resistance. The silicone has excellent resistance to concrete. It can also be used very well for casting resins.
The high flow and tear resistance as well as the low Shore A hardness ensure that concrete casting moulds for models with deep undercuts and moulds for very precise copies can be produced from casting resins in particular. M4630 has excellent long-term stability of the mechanical properties of the vulcanisate.
Processing
We recommend stirring both component A (silicone) and component B (silicone curing agent) thoroughly before mixing (avoid bubble formation as far as possible). Then mix 100 parts of component A with 10 parts of component B very thoroughly, e.g. using an electric mixer on a low setting (to largely avoid the formation of air bubbles). If possible, de-aerate the mixture in a vacuum at 30 - 50 mbar (in a vacuum, the mixture expands four to five times and bubbles form on the surface. These bubbles gradually disappear again and after about 5 minutes the mass has its original volume again).
TECHNICAL SPECIFICATIONS:
The following information is for guidance only and should not be used for the preparation of specifications.
Product properties before mixing
| M4630 A | M4630 B | |
| Colour | grey white | white colour |
| Appearance | viscous liquid | viscous liquid |
| Viscosity at 23° C | approx. 15,000 mPas | approx. 800 mPas |
| Density at 23° C | 1.14 g/cm³ | 1.01 g/cm³ |
Processing
| Mixing ratio | 10:1 (A:B) by weight |
| Working time (at 23° C) | approx. 90 minutes |
| Demoulding time (at 23° C) | approx. 12 hours |
Properties after complete curing
| Colour | white |
| Density in water | 1.13 g/cm³ |
| Shore A hardness | 28 |
| Tensile strength | approx. 6.5 MPa |
| Elongation at break | approx. 700 % |
| Tear strength | approx. 30 kN/m |
| Linear shrinkage | < 0,1 % |
Please note: Only components A and B with the same batch number may be processed together!
The curing of polyaddition silicones can be disturbed by
- Latex glove
- Salts
- Heavy metals
- Amines
- Sulphur and sulphur derivatives
- Hardener for epoxy resin
Classification according to Regulation (EC) No. 1272/2008: The products are not classified as hazardous according to the GHS/CLP guidelines and do not require labelling.
EUH 210 Safety data sheet available on request.
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