V P + N P G O A V P + H D O A
H E A + H O D A H E A + N P G D A
EHA+NPGDA I E H A +
Oligomer
Crosslink D e n s i t y
H D D A
(xlO~3)
Radiation curing is fast.
E32TC1 ΙΜΤ«Π x S u even faster. Of course speed is not the only reason for going to radiation curing. But now that the natural gas shortage, the high cost of petroleum based (hydrocarbon) solvents, and EPA regulations have made UV curing economically feasible, it's logical to make the most of its in herent advantages. Curing speed is one of those inherent advantages. And G A F's V-Pyrol(R' monomer can in crease the speed in a UV curing sys tem as much as 2 or 3 times over other reactive monomers. Similar cure rate advantages are also observed in elec
tron beam systems using V-Pyrol. But V-Pyrol has a lot to recommend it in addition to increasing curing speed. This G A F R monomer is a reactive dilu ent that readily copolymerizes with acrylate systems used in most radiation curable coatings. With a viscosity of 2.07 cps, V-Pyrol monomer can reduce many of the thicker formulations to a workable range. It's also an excellent dye and pigment dis persant and has been shown to give many UV formulations better wetting properties, better adhesion to certain substrates and higher gloss.
The graph above shows the results of just one test that demonstrates the in creased curing speed of formulations including GAF V-Pyrol monomer. For more like it, and other pertinent infor m a t i o n , w r i t e to G A F C o r p o r a t i o n , Chemical Group, 140 West 51st Street, New York, N.Y. 10020.
