VARNISHES
YSB-AD 863 (B Class Fast Air Drying Gold)
Rapid Drying as such ensures quick service
High Bonding and hence firmly holds the wires
Resists Moisture / hot transformer oil / mild acids& alkalis
Provides shiny surface finish
Ability to penetrate &Spread deeply
Durable Insulation & Stable Hardness
Excellent Electrical Properties
Product Description :
YSB-AD is a Phenolic resin based quick air drying varnish providing Class B (Temp. index 1300C) insulation. Its unique blend of properties makes it suitable for versatile application. The product due to its quick baking property increases productivity & reduces electricity consumption. Ensures durable insulation at elevated temperature of 1300C & even under humid conditions. Ensures 100 % insulation even at inaccessible areas due to its deep penetration property & thus provides longer life to winding. .
Application Areas :
YSB-AD use in insulation of motors, alternators, generators, fans, transformers and chokes. Also finds application in windings, electric components, Phenolic laminates, circuit boards etc as a finishing varnish. It is best suited for rewinding in all types of windings, small armatures, high speed motors, oil cooled transformer & applications under chemically aggressive atmosphere. The product yields superior results if a drying schedule of 30 mins. in air & then 2-3 hrs at 110-1200C is followed.
TECHNICAL INFORMATION OF YSB-AD :
|
Properties |
Method |
Standard Values |
|
Colour |
---- |
Golden yellow liquid |
|
Viscosity |
F/C B-4 / at 30ºC |
25 – 35 seconds |
|
Sp. Gravity |
at 30ºC |
0.89+- 0.02 |
|
Non Volatile matter |
2gms/120ºC/1hr |
46+ 1 % |
|
Flash Point |
Open Cup |
40ºC |
|
Effect on enameled
wire |
---- |
No reaction |
|
Reaction of Varnish with Copper |
---- |
No reaction |
|
Compatibility with Thinner |
Varnish:Thinner |
1:8 min |
|
Drying Properties |
||
|
Touch
Dry |
At RT |
30-40 min. |
|
Drying
Time in thin layer |
At RT |
90-100 min. |
|
Recommended
drying schedule |
4 - 6 hrs At Room Temperature
or 3 - 4 hrs At 70ºC |
|
|
Properties of Cured Film |
||
|
Flexibility |
Mandrel apparatus |
No crack observed |
|
Dielectric
strength |
@ 30ºC @ 130ºC after 24 hrs immersion in water |
73 KV/mm 58 KV/mm 43 KV/mm |
|
Effect
of Transformer oil |
|
No effect |
|
Temperature
Index |
By TGA in air |
175ºC |
|
All
the testing have done as per IS : 10026 (Part III) – 1983 |
||
Surface Preparation & Application Method :
Ensure before application, wire windings are free from moisture ,dirt and other impurities. YSB-AD can be applied by any suitable method like brushing / pouring / dipping /impregnation.
Packing, Storage & Shelf life :
180 kg pack sizes. Store in a cool & dry place
Shelf life – 1 year from date of manufacture in original sealed container at Room Temperature
YSB-F 864 (F Class Baking)
High bond strength hence firmly holds the wires
Stony Hardness
Resists hot transformer oil /mild acids & alkalis
Fat Drying
Durable Insulation
Excellent Heat & Moisture Resistance
Exhibits good flexibility
Excellent electrical properties
Product Description :
YSB-F is an isophthalic alkyd resin based baking type impregnating varnish providing F Class (Temp. index 1550C) insulation. It exhibits excellent dielectric properties under humid condition, good bonding and adhesive strength. Its hardness & good flexibility protects the wire winding from external shocks. .
Application Areas :
YSB- F is suitable for all kinds of motors & alternators specially AC Induction motors, transformers, fans & chokes. It is recommended for Railway and Navy auxiliaries. Useful for impregnation of stators, rotors, generators etc. Used to maintain insulation in equipment operating continuously at high temperature & humidity.
TECHNICAL INFORMATION OF YSB-AD :
|
Properties |
Method |
Standard
Values |
|
|
Colour |
---- |
Amber
Golden |
|
|
Viscosity |
F/C
B-4/ at 30ºC |
50 – 60 Seconds |
|
|
Sp. Gravity |
at
30ºC |
0.90 ± 0.01 |
|
|
Non Volatile matter |
2gms/120ºC/1hr |
48 ±
1% |
|
|
Flash Point |
Open
Cup |
25ºC |
|
|
Effect on enameled
wire |
---- |
No
reaction |
|
|
Reaction of Varnish with Copper |
---- |
No
reaction |
|
|
Compatibility with Thinner |
Varnish:Thinner |
1:8
min |
|
|
Drying Properties |
|||
|
Drying
in Thin layer |
120ºC for 3 hrs |
Non tacky |
|
|
Curing
in Thick layer |
120ºC for 12 hrs |
Smooth Top ;
Non-Tacky Underneath ; Hard, Tough Inside |
|
|
Re
softening |
1650C |
No change |
|
|
Specimen
curing |
|
12 hrs at 120ºC |
|
|
Recommended
drying schedule |
10-12 hrs at
120ºC or 2 hrs. at 120ºC & then
4 hrs. at 150ºC |
||
|
Properties of Cured Film |
|||
|
Dielectric
strength |
@ 30ºC @ 155ºC |
75 KV/mm 70 KV/mm |
|
|
Volume
Resistivity |
500 VDC in air After 168hr
immersion in water. |
4.2 x 1015 ohm-cm 2.2 x 1014 ohm-cm |
|
|
Dissipation
factor |
230 V /
50Hz / 300C |
0.0120 |
|
|
Di-electric
constant |
230 V /
50Hz / 300C |
2.90 |
|
|
Temperature
Index |
By TGA in air (
Specimen Post Cured at 1650C for 16 hrs) |
164.40C |
|
|
All the testing have done as per IS :
10026 (Part III) – 1983 |
|||
Surface Preparation & Application Method :
Ensure before application, wire windings are free from moisture and other impurities. YSB-F can be applied by any suitable method like brushing / pouring / dipping /impregnation.
Packing, Storage & Shelf life :
180 kg pack sizes. Store in a cool & dry place
Shelf life – 1 year from date of manufacture in original sealed container at Room Temperature
AIR DRYING VARNISH
|
VARNISH |
||||||||||
|
Sr. |
Product Name |
Type |
% Solid |
Solvent |
Colour Gardner |
Viscosity Poises at 25 |
Acid Value KOH/gm |
Hydroxyl Value KOH/gm |
Hydroxyl Equivalent |
Properties/Uses |
|
1 |
YSB-1070 |
35 |
- |
- |
Excellent colour & gloss retentions and
weather resistance. Excellent resistance to soap and detergents. Drying
within seconds. |
|||||
|
2 |
YSB-1071 |
50 |
- |
- |
Excellent colour & gloss retentions and weather
resistance. Excellent resistance to soap and detergents. Rapid drying. |
|||||