MP melamine-phenolic resin

MP melamine-phenolic resin PARAMETER

UNIT

VALUE

REFERENCES

Common name

-

melamine-phenolic resin

CAS name

-

phenol, polymer with 1,3,5-triazine-2,4,6-triamine

Acronym

-

MP

CAS number

-

35484-57-2

-

OH

GENERAL

SYNTHESIS Monomer(s) structure

NH2 N H2N

N N

NH2

Monomer(s) CAS number(s)

-

108-95-2; 108-78-1

Monomer(s) molecular weight(s)

dalton, g/ 94.12; 126.12 mol, amu

Method of synthesis

-

condensation of methylolated melamines with phenol in the presence of stoichiometric amounts of hydrochloric acid

Some manufacturers

-

Momentive (Hexion)

Trade names

-

Bakelite

COMMERCIAL POLYMERS

PHYSICAL PROPERTIES Density at 20oC

g cm-3

1.3-1.5; 1.6-1.90 (mineral and glass filled)

Bulk density at 20 C

g cm

0.58

Melting temperature, DSC

o

50-70

Thermal conductivity, melt

W m-1 K-1

0.58

Maximum service temperature

o

C

152-155

Heat deflection temperature at 1.8 MPa

o

C

135-194 (reinforced)

Dielectric constant at 100 Hz/1 MHz

-

6.5-7/

Relative permittivity at 100 Hz

-

7.5

Dissipation factor at 100 Hz

E-4

80-540

Volume resistivity

ohm-m

1E10 to 1.8E11

Surface resistivity

ohm

1E11

Electric strength K20/P50, d=0.60.8 mm

kV mm-1

8.5-28.5

Comparative tracking index, CTI, test liquid A

-

300

Arc resistance

s

180-186

o

-3

C

MECHANICAL & RHEOLOGICAL PROPERTIES Tensile strength

MPa

Tensile modulus

MPa

10,000-12,500 (reinforced)

Elongation

%

0.64-0.81

202

41-55; 56-60 (reinforced)

HANDBOOK OF POLYMERS / Copyrights 2016; ChemTec Publishing

Stark, W, Polym. Test., 29, 723-28, 2010.

MP melamine-phenolic resin PARAMETER

UNIT

VALUE

Flexural strength

MPa

84-262 (reinforced)

Flexural modulus

MPa

8,900-13,500 (reinforced)

Compressive strength

MPa

165-600 (reinforced)

Izod impact strength, notched, 23oC

Jm

Rockwell hardness

-

R71-120

Ball indention hardness at 358 N/30 S (ISO 2039-1)

MPa

290 (reinforced)

Shrinkage

%

0.1 (injection), 0.3 (post), 0.02 (compression molding shrinkage)

Water absorption, equilibrium in water at 23oC

%

0.36

Acid dilute/concentrated

-

poor

Alcohols

-

resistant

Alkalis

-

poor

Aliphatic hydrocarbons

-

resistant

Aromatic hydrocarbons

-

resistant

Esters

-

resistant

Greases & oils

-

resistant

Halogenated hydrocarbons

-

resistant

Ketones

-

resistant

Limiting oxygen index

% O2

33

UL 94 rating

-

V-0

NFPA: Health, Flammability, Reactivity rating

-

1/1/0

Carcinogenic effect

-

not listed by ACGIH, NIOSH, NTP

Typical processing methods

-

compression molding, injection molding, powder molding

Processing temperature

o

Processing pressure

MPa

Process time

min

0.6-0.66 (per 1 mm wall thickness)

Applications

-

actuators, fan motors, fuel pumps, garden appliances, HVAC motors, household appliances, photoresists, power tools, universal motors, window lift motors, wiper motors

ppm

-NH-CH2-oPhOH  406-41.1; -NH-CH2-pPhOH  44.2; -N(CH2)-oPhOH  45.6-46.4; -N(CH2)CH2-pPhOH  48.5-49.2

-1

REFERENCES

430

CHEMICAL RESISTANCE

FLAMMABILITY

TOXICITY

PROCESSING C

160-170 15 (injection), 0.5-2 (back)

ANALYSIS NMR (chemical shifts)

HANDBOOK OF POLYMERS / Copyrights 2016; ChemTec Publishing

Maciejewski, M; Kedzieski, M; Bednarek, E; Rudnik, E, Polym. Bull., 48, 251-59, 2002.

203