Pliogrip Resins & Chemicals Pvt Ltd

Hot Curing Solid Epoxy System for current and potential transformers

GENERAL DESCRIPTION

PLiOGRIP EPOXY RESIN PER 5200TC is an unmodified solvent free, solid epoxy resin. It has a lower viscosity at the processing temperature of 120'C and gives a longer pot-life.

PLiOGRIP HARDENER PH 700, a white solid organic acid anhydride, is recommended for use with PLiOGRIP PER 5200TC resin. Being very reactive, it does not require the use of an accelerator.

APPLICATION:

Pliogrip Epoxy Resin PER 5200TC is used for casting, bushing, potting voltage transformers, high voltage current transformers (CTs & PTs), metal joints in electrical applications, impregnation and encapsulation of coils, dry type transformers. OLTC Boards, Busbar supports etc. The mouldings produced have exceptionally good electrical insulation properties for wide range of industrial applications and excellent mechanical and chemical resistance properties.

PROPERTIES OF PLiOGRIP EPOXY RESIN PER 5200TC

Properties	Values
Type	Unmodified solvent free, solid epoxy resin
Specific gravity @ 25°C	1.10-1.20
Appearance	Yellow to amber colour
Epoxy equivalent Viscosity	350 - 400
@ 120'C (CPS) Exotherm @	270 - 400
120'C (max)	160 -165
Chlorine content (max.%)	0.5

PROPERTIES OF HARDENER PH 700

Properties	Values
Type	Organic acid allhydride
Appearance	White crystalline flakes
Flash Point °C	130-132

MIXING RATIO (PARTS BY WEIGHT)

Pliogrip epoxy resin	PER 5200TC	100
Pliogrip hardener	PH 700	30
Dry Silica flour (mesh size 250-300) (Pre heated at 120°C for 6-8 hQurs)	PF 101	Nearly 200

MIXING TEMPERATURE AND PROCEDURE

PLiOGRIP EPOXY RESIN PER 5200TC is melted separately by heating at 110' -150'C.lt is then mixed with the required quantity of hot filler under a vacuum of 1-2 mm of Hg for 1-2 hours. The pre-weighted quantity of hardener.PLlOGRIP PH 700 is added into the mix at around 125' to 135' C and mixed thoroughly keeping the vacuum around 20 mm of Hg for 5-10 min.

POT LIFE

The usable life of the system (viscosity up to 1500 cps) for 400 gms mass of the mix for t_he unfilled system is as follows:

Curing temperature °C	Minimum curing time, Minutes.
120	90 -120
130	60-100
140	50-90

CURING SCHEDULE:

In order to achieve the best mechanical properties, it is recommended to cure initially at a temperature not exceeding 140 'C and subsequently post cure for above 2 hours at 160°C. The minimum demoulding time is 4-5 hours at 120 'C .or 3-4 hours at 140 'C.

Curing temperature °C	Minimum curing time, Hrs.
120	24
130	14
140	10

Property	Filled system
Specific gravity @ 25 DC g/cc	1.8 - 2.0
Tensile strength (kg/em')	650 - 850
Compressive strength (kg/em')	1500-2000
Flexural strength (kg/em') Impact	800 -1200
strength (KJ/m') Marten's HDT (0 C)	8-12
Modulus of elasticity (N/mm')	110 - 120
Coefficient of linear thermal expansion K•'	30 - 35 x 10•'
Volume resistivity Q (ohm-em)	above 1014
Dielectric strength [2 mm thick plate] (kV/cm) Loss factor (Tan 8)@ R.T.	180 - 220
Water absorption (% w/w)	0.009 - 0.01 below 0.3
Decomposition temperature ° C	356
Dielectric constant (Er) 20 °C	4.0 - 4.2

PACKING:

RESIN/HARDENER: 50 Kgs. Barrel/25 kgs. Bag

SAFETY PRECAUTIONS :

Direct contact of Resin/Hardener with skin should be avoided. Use of hand gloves while handling them I, ' recommended. Splashes on the skin, if any, should be removed immediately with soap and lukewarm water or with a suitable remover.

STORAGE:

Should be stored in closed containers in cool condition away from direct sunlight. Shelf life cif Resin & Hardener @ 25°C. is about 12 months from the date of manufacturing.

NOTE:

The information given in this literature is based on the present state of our knowledge but any conclusions and recommendations are made without any liability on our part. Buyers and users should make their own assessment of our products under their own conditions and for their own requirements.