AOC SYNOLITE? 6494 U 2 DCPD Unsaturated Polyester Resin

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Chemical/Physical Properties

Synolite? 6494-U-2 is a DCPD based unsaturated polyester resin dissolved in styrene. The resin is pre-promoted with polymeric amines and has medium viscosity and high reactivity.

major application

Synolite? 6494-U-2 is a versatile putty resin primarily used in the manufacture of body fillers and putties for benzoyl peroxide curing. Filler pastes made from Synolite? 6494-U-2 have excellent dry sanding capabilities and do not clog sandpaper quickly. The resin is cold cured even at about 0°C.

Main characteristics

Fillers and putties based on Synolite? 6494-U-2 allow for early dry sanding capabilities, especially on sanders. The hardness of Synolite? 6494-U-2 is equivalent to the hardness of a 4:6 combination of rigid Synolite? 9248-U-3 and flexible Synolite? 2710-U-2. Synolite? 6494-U-2 is well suited to be used as the sole binder for body fillers, accepts higher filler loadings, and shows excellent storage stability of the derived paste. It can be made stiffer by adding Synolite? 9248-U-3 and more flexible by combining with Synolite? 2710-U-2. Synolite? 6494-U-2 Putty shows good adhesion to a variety of substrates including mild steel, galvanized steel, aluminum and polyester.

Product specifications at the time of delivery

causality	realm	unit (of measure)	TM
exterior condition	limpid	-	2265
Color, Gardner	0 - 7	-	2017
Acid value, original value	18 - 24	mg KOH/g	2401
Viscosity, 23°C	582 - 788	mPa.s	2013
Solid Content, Infrared	65.0 - 68.0	%	2033
Gel time from 25 to 35°C	5.2 - 7.2	minutes	2625
Cure Time from 25°C to Peak	8.0 - 12.0	minutes	2625
peak temperature	104 - 127	°C	2625

note
Curing properties are obtained through the use of
2 wt.% BPO-50% Perkadox CH50L (AKZO Nobel).

Properties of liquid resins (typical values)

causality	(be) worth	unit (of measure)	TM
flash point	About 33	°C	2800
Stable, no initiator, dark, 25°C	Minimum 6 months	minutes	-

Properties of cast unfilled resins (typical values)

causality	(be) worth	unit (of measure)	TM
tensile strength	19	MPa	ISO 527-2
Tensile modulus of elasticity	0.79	GPa	ISO 527-2
Elongation at break	33	%	ISO 527-2
bending strength	30	MPa	ISO 178
Bending modulus of elasticity	0.92	GPa	ISO 178
heat distortion temperature	30	°C	ISO 75-A
Impact Strength - Unnotched	14	kJ/m2	ISO 179
durometer	78	Shore D	2602

note
Castings (4 mm) are cured with 2 wt.% BPO-50% Perkadox CH50L (AKZO Nobel). 2 hours after curing. 60°C + 2 hours. At 80°C + 2 hours. At 100°C.

Typical Starting Formulation

ingredient	weights
Synolite 6494-U-2	300,00
Thixcin E (a)	10,00
Finntalc M50 (b)	475,00
Titanium dioxide (c)	50,00
Barium sulphate EWO (d)	140,00
Styrene monomer	25,00

commentaries
a) Elementis Specialties, b) Mondo Minerals, c) Kronos Europe d) Sachtleben.
Putty gel time at 20°C: 3-4 minutes when using 2 wt.% BPO-50% Paste (AKZO Nobel Perkadox BT-50).

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