yellowing component in Polyster resin
yellowing component in Polyster resin
(OP)
A problem which we are presently facing is that orthophthalic polyster resin purchased from two different locations are having two different colours .One is yellowish whereas the other tends towards green . Due to the big difference in the colour the products made from these two locations though identical in process are looking tone wise different . The supplier is at a loss as to why such a difference exists between their polyester an that from another supplier .
Can someone suggest the possible components to check which may be responsible for the resin colour moving towards green .
The resin comes already mixed with stirene and it is in a ratio of around 65 ester to 35 styrene.
Thanks in advance ,
Nik Smith
Can someone suggest the possible components to check which may be responsible for the resin colour moving towards green .
The resin comes already mixed with stirene and it is in a ratio of around 65 ester to 35 styrene.
Thanks in advance ,
Nik Smith





RE: yellowing component in Polyster resin
RE: yellowing component in Polyster resin
Demon3 is partly correct on the antioxidants involved in the resin polymerisation. Colours moving towards green could only mean insufficent antioxidants or the material is kept too long or the storage conditions is poor eg humid, wet or temperatures too warm. Hope this helps.