General Description
COTSET is a phenol formaldehyde resin which is activated by ester. It is used for making mould & cores production suitable for ferrous steel & nonferrous casting. COTSET PART A is a highly alkaline phenolic resin. COTACT PART B is an ester.

Convetional alkyd resin system require higher setting time up to 70-80 minutes, whereas COTSET - has faster setting time up to 45 - 50 min., which enables production of mould at faster rate.

»  Excellent dimensional accuracy.
»  high mould & core strength.
»  Good breakdown properties.
»  Low emission of fumes during pouring.
»  Superior casting finish.
»  Good resistence to sagging.
»  Faster rate of production.
»  Low gas evolutuion.

Instruction for use
Choose a dry sand having AFS no. 50-55 with low acid demand value & clay content 0.5 % max. If used on batch mixer, than add COTACT PART B-mix for 11/2 mix for 11/2 min.

Addition Levels
SAND 50-55 (New)     100 %
COTSET PART A          2 ± 0.2 % of sand
COTACT PART B         25 ± 5.0 % of part A

The following factor directly effect the bench life & strip time of the mixed sand.
A) Increse in BENCH LIFE Lower proportion of COTACT PART B
B) Decrease in BENCHLIFE Higher proportion of COTACT PART B
The COTACT PART B level can be varied from 40-60 % to influence the B e n c h Life. Shop floor adjustment needs to be made based on actual trials.
C) Range of COTACT PART B are available for achieving desired strip time.

New sand with COTACT PART B

  5 ± 25 min   40 ± 10 min

Sand Test Result

  SAND (NEW):   100%
  COTSET PART A   2 ± 0.2% of sand
  COTSET PART B   25 ± 5% COTSET Part A part

  Time after sand mix Preparation   Compression strength kg/cm2
1st hrs 10 ± 2
2nd hrs 20 ± 2
4th hrs 40 ± 2
24th hrs 40 ± 2

Standard Packing
COTSET PART A : 250 kg in plastic (HDPE) Barrel
COTSET PART B : 50 kg Carboy

Shelf Life & Storage
Shelf life is two months from the date of manufacturing. It is therefore recommended that the material should be used within specified time period COTSET PART A & COTACT PART B is a strong organic compound & Direct Contact with skin or body should be avoided.

Contact with Part A & Part B, should be avoided.
In case of -
1) Contact with Skin : wash with soap water.
2) Contact with Eyes: wash out throughly with water wash & seek medial advice immediately.
3) Spillage : Do not flush with water, which can contaminate the sewage. Cover the spillage with sand or saw dust and disposed the waste to recommended disposal site.