TECHNICAL DETAILS OF SHREECRYL SS-909

 

PHYSICAL APPEARANCE Shreecryl SS-909 is a crystal clear solution, of free flowing viscosity without any type of visible particles.
CHEMICAL NATURE
It is a polymer of more than three very active acrylic monomers in solvent phase by strict control of the rate of reaction between the very active monomers by means of controls in the hands of highly experienced Technologists.
NON - VOLATILES 50 ± 1 %
Free monomer
below 0.5% (After neutralizing acidity of solvent and other constituents)
Film on glass
Very clear without any particles / coagulum
Tack on film Excellent/ Very High
Adhesion Value at 30 gsm 180° peel off on steel/glass Excellent. Average 2600-2800/inch , Maximum 3000gms/inch
Adhesion Value at 30 gsm after 7 days at 70°C Excellent. Average 2600-2800/inch , Maximum 3000gms/inch
Flow of product when freely Drop in adhesion value is within limits.
Viscosity by Brookfield Viscometer RVT Model at 10 RPM Sp.No.3/4, at 30ºC 15 - 40 Poises

Resistance to UV :
The Product is resistant to UV exposure. The dry film can withstand atmospheric UV beyond 5 years.

PEEL STRENGTH METHOD :
30 gsm coating (dry) on polyester, 30 micron thickness, dried at 152ºC for 2 minutes.  Cool to room temp then press coated film on to the glass plate/ steel plate supplied by the equipment supplier. The film is pressed by supplied roller. Then after 2 hrs, the glass plate/steel plate is attached to the equipment. 180º peel off is noted on the dial, so also the maximum value reached
Normal values are 2600 to 2800 grams/inch.
Maximum values goes upto 3000 grams/inch.

COMPATIBILITY :
Shreecral SS-909 is compatible with solvents like Ethyl Acetate, Isopropyl Acetate, Butyl Acetate, Toluene, Xylene to some extent with ketones like acetone, MEK, MIBK.

SS-909 can be plasticised (low %) with DBP, DOP for the manufacture of mosquito, cockroach masks. Oil/solvent soluble colors can be blended for colored tapes/stickers. Noncompatible with alcohols, water, pigments.

SS-909 is compatible with polyterpene or hydrocarbon tackifiers (Softening point 110-115ºC) at 1-2% by weight dissolved in toluene (50:50) by weight).

The dried film is resistant to transformer oil, water and to some extent solvents.

CROSS LINKING :
The Product cross links when a catalyst like Desmodur L-75, primary & secondary amine are added to get a thermoset. The mixture with catalyst has a very limited pot life.


APPLICATION TECHNIQUES :

  1. Roller Coating
  2. Brush
  3. Spray coating
In no case, screen coating, as it blocks the screen after drying

USE OF SHREECRYL SS-909 :
1.The UV resistant product is developed, for long life sun-control films.
2. Due to high peel value, cohesion value, UV resistance, excellent tack, it is well suited for precoated foam (all types) for automobile, insulation purposes.
3. High performance tapes, polyester, PVC, Foam, Alu foil, Paper etc.
4. Being resistant to water, it can go well for under water applications.

ADVANTAGES OF SHREECRYL SS-909
1. Being manufactured under the personal supervision of highly qualified and experienced persons, the product has excellent consistency regarding viscosity, strength, clarity, molecular weight distribution and flow properties.
2. Due to uniform copolymerisation, the shelf-life is longer compared to a product polymerized hapzardly just to get viscosity.
3. The product has better shelf life.

STORAGE OF SHREECRYL SS-909 (affected by high temperatures during storage)

As the product contains 50% or more Ethyl Acetate (Volatile Solvent with B.P. 77.1ºC),the following precautions during storage are very necessary :

1) Keep the drums / carboys in air circulating rooms / storage facility with good ventilation & not under sun.
2) Away from heat & fire.
3) Store below 30ºC. It is advisable to store 25ºC or below to enhance shelf life.
4) If unused for 10-15 days, open top lids & allow solvent vapour to escape. Add 2-3 kgs of Ethyl Acetate & roll the barrels and then store them.
5) At temperatures above 30-35ºC solvent evaporates & the product may thicken. To avoid gelling follow steps 1-4 above.

DO'S & DO NOT'S
1. Do not mix any other inferior product available in the market under disguise of any acrylic copolymer in solution form. As the copolymerisation reaction is very sensitive, narrow range of molecular weight distribution is obtainable only under stringent controls by higher stringent controls by higher skilled technologists.
2. Check the peel strength for every lot/batch before and after exposure to high temperature (70ºC).
3. Check the supply for any micro-gells, which can cause non-uniform application tack.
4. When mixed with amines, the pot life of mixture is 8 – 12 hours only. So mix only requisite quantities.
5. Do not keep the drum/carboys filled with SS-909 open near sources of heat or fire. SS-909 is highly flammable due to ethyl acetate.
6. As it is a solvent based system, shelf life is not warranted above 6 months.  Hence, no complaints what so ever will not be entertained after 6 months from the date of delivery. .

PACKING SIZE : 200Kgs, 50Kg, & 5 kg

Note: The above data, suggestions and recommendations are given in good faith without any waranty whatsoever.

 
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