Factory Wholesale 99.8% Pure Yellow Melamine Powder Daily Chemicals for Moulding Compound in Tableware for Melamine Tableware
Factory Wholesale 99.8% Pure Yellow Melamine Powder Daily Chemicals for Moulding Compound in Tableware for Melamine Tableware
PNS-Certified Melamine Moulding Compound Powder (MMCP) – Technical Specifications & Industrial Applications
Melamine Moulding Compound Powder (MMCP) is a thermosetting resin primarily composed of melamine-formaldehyde (MF) polymers. Below is a detailed breakdown of its chemical structure and key components:
1. Base Monomers
Melamine (C₃H₆N₆): A heterocyclic triazine compound with three amino groups (–NH₂).
Formaldehyde (CH₂O): Reacts with melamine to form cross-linked polymers.
2. Polymerization Reaction
Melamine and formaldehyde undergo polycondensation to form a 3D network:
Methylolation:
C₃H₆N₆ + 6CH₂O → C₃H₆N₆(CH₂OH)₆ (Hexa-hydroxymethyl melamine)
Cross-linking:
Hydroxymethyl groups (–CH₂OH) further react to form methylene (–CH₂–) and (–CH₂–O–CH₂–) bridges, creating a rigid thermoset structure.
3. Additives in MMCP
Fillers (e.g., cellulose, minerals): Improve mechanical strength.
Catalysts (e.g., ammonium chloride): Accelerate curing.
Pigments: Provide color stability.
4. Molecular Characteristics
High nitrogen content (≈50%) contributes to flame retardancy.
Cross-linked MF polymers are insoluble and heat-resistant (up to 120°C).
This structure underpins MMCP’s durability and industrial utility. Let me know if you need further elaboration on specific bonds or applications.
Specification
|
Item
|
Index
|
Test Result
|
|
Appearance
|
White Powder
|
Qualified
|
|
Mesh
|
70-90
|
Qualified
|
|
Moisture%
|
<3%
|
Qualified
|
|
Volatile Matter%
|
4.0
|
2.0-3.0
|
|
Water Absorption(cold water),(hot water) Mg,≤
|
50
|
41
|
|
65
|
42
|
|
|
Mold Shrinkage%
|
0.5-1.0
|
0.61
|
|
Heat Distortion TemperatureºC
|
155
|
164
|
|
Mobility(Lasigo) mm
|
140-200
|
196
|
|
Charpy Impact Strength KJ/m2 ≥
|
1.9
|
Qualified
|
|
Bending Strength Mpa ≥
|
80
|
Qualified
|
Uses
1)melamine-formaldehyde resin
2)docorating plates
3)amino plastic
4)corehent agent
5)intensifier of paper currency
6)texitile assistant
7)water-saving agent of cement
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