TECHNICAL DETAILS OF SHREECRYL SS-999

 

PHYSICAL APPEARANCE Shreecryl SS-999 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  & mix of cross linking agents 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 46 - 47 %
pH   Value  of  product
3 – 6  (boiled in water  1 : 1 by weight and the filtered water is cooled and pH is observed)
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
Adhesion Value at 25 gsm cured at 85ºC, 8 min Steel /PET 2500 gms/ inch
Adhesion Value at 30 gsm cured at 85ºC, 8 min Steel /PET 3000 gms/inch
Flow of product when freely Very free flowing when poured.
Viscosity by Brookfield Viscometer RVT Model at 20 RPM Sp.No.4/5, at 30ºC 14 – 18 poises. (1400 cps – 1800 cps)

PEEL STRENGTH METHOD :
30 gsm coating (dry) on polyester, 30 micron thickness, dried at 85ºC for 8 minutes.  Cool to room temp, hold 2 hrs then press coated film on to the steel plate supplied by the equipment supplier. The film is pressed by supplied roller. Then after 15 minutes the steel plate is attached to the equipment. 180º peel off is noted on the dial, so also the maximum value reached.

COMPATIBILITY :
Shreecral SS-999 is compatible with solvents like Ethyl Acetate, Isopropyl Acetate, Butyl Acetate, Toluene, Xylene, to some extent with ketones like acetone, MEK, MIBK SS-999 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-999 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.

APPLICATION TECHNIQUES :
Roller Transfer coating or spray coating
In no case, screen coating, as it blocks the screen after drying

USE OF SHREECRYL SS-999 :
  1. For the manufacture of tapes like BOPP/PVC/PET/CELLOPHONE/PAPER/alu where permanent tack and high peel strength are essential.
  2. Rigid PVC Precoated films.
  3. SS-999 is non-toxic after the film is dry. Hence it is being use for making PET based Band Aids. Similarly due to non-toxicity and very negligible free monomer content. SS-999 is safe for use in sanitary napkins/personal products.
  4. SS-999 when mixed with primary /secondary/cyclic amines in the ratio 100pbw SS-999 0.005-0.05pbw of these amines gives a thermo setting composition for permanent bonding of plastic to plastic, plastic to any hard surface.
  5. Used in manufactures of foam coating, Single/double sided.
  6. High peel value gives better bonding to metal surfaces.

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 hapazardly just to get viscosity.
3. The product has better shelf life.

STORAGE OF SHREECRYL SS-999 (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 (70 – 80ºC) or follow the peel strength test method.
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-999 open near heat or flame. SS-999 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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