Melamine Formaldehyde

Melamine resin or melamine formaldehyde is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. The presentation includes the preparation of MF, its properties and applications.

1. MELAMINE FORMALDEHYDE BY : VINAY

2. - Amino type resin - REACTANTS METHODS OF PREPARATION

3. Preparation of melamine formaldehyde resin is two step process :- S tep-1 : Resinification reaction between melamine and formaldehyde * depend on - melamine to formaldehyde molar ratio - pH of the medium * it leads to formation of mixtures of water soluble methylol melamine *Depending on the prevalent rxn conditions , methylol up to six methylol groups per molecule (i.e. Melamine is potentially hexafunctional) may be obtained. Step-2 : Polycondensation reactions ultimately form methylene bridges between melamine groups in a rigid network structure results in cross linking.

4. Commercial resinification- R eactor used : jacketed still fitted stirrer and reflux condenser type reactor Initial molar ratio of M:F :: 1:3 pH = 8-8.5 by using Na₂CO₃ Methylolation is done at temp 80-85⁰C for 2hrs. Melamine goes into solution and form methylol derivatives. Commercial Preparation :

5. Cooling solution yield polymer in latex form which will stabilized by adding borax (pH regulator) and increases shelf life of just few days to several months ... Commercially , resin is condensed to a point close to hydrophobe point or converted into moulding powder , before preceding with final cure.

6. Jacketd reactor JACKTED TYPE OF REACTOR

7. DIFFERENT DERIVATIVES OF METHLYLOL GROUPS

8. POSSIBILITIES OF REACTION BETWEEN DIFFERENT METHYLOL GROUPS

9. CROSS LINKING REACTION -Heating at 150˚c or by any external catalyst

10. Better heat resistance than PF & UF. less water absorption power . better cracking resistance than UF & PF . Good stain resistance towards fruit juices and beverages. Available in wide range of colours . Good insulation character (up to 373 k) at both damped and elevated temperatures . PROPERTIES

11. Solubility : solubility in hydrocarbon improve by adding butanol instead of methanol. High surface hardness . better scratch resistance. but expensive than UF And PF . MF Resin may be used as adhesives , in coating applications , kitchen, and as decorative papers.

12. STAIN RESISTANCE BETTER LESS WATER ABSORPTION POWER DUE TO WIDE RANGE OF COLOUR KITCHEN UTENSILS

13. Advantages More durable than UF, lower formaldehyde emissions , high tack with low viscosity (important for fiberboard), cure over a wide range of pH Disadvantages More expensive than UF, less durable than PF. ADHESIVE

14. By using butanol instead of methanol which is a flexible group solubility and compatibility with hydrocarbons improve helps in coating applications . MODIFICATION FOR COATING APPLICATIONS

15. Available in wide ranges of colour DECORATIVE SIGNS AND LAMINATES

16. COUSTMER CAN SAVE MONEY NO NEED FOR DELIVERY COST Eg . Book shelves ----------> READY TO ASSEMBLE FURNITURE

17. RADIO & KITCHEN CABINETS

18. PACIFIC TEXCHEM PRIVATE LIMITED, MUMBAI SAKSHI DYES & CHEMICALS , DELHI SYNTHOTEX CHEMICALS PVT. LTD. , KALYAN RADIANCE BIO SYNTHETICS PVT. LTD. , MUMBAI ( FOR LAMINATIONS .) MANUFACTURER OF MELAMINE FORMALDEHYDE IN INDIA

19. PLASTIC MATERIAL -MELAMINE FORMALDEHYDE RESIN