18 March 2010 20:53 [Source: ICIS news]
By Doris de Guzman
NEW YORK (ICIS news)--Can-coating suppliers already have bisphenol A (BPA)-free epoxy technologies that are ready to deploy, an official from US consultancy StrategyMark said on Thursday.
“Having the technology in the hands of the formulators such as Valspar, PPG or AkzoNobel, and motivating the can makers, such as Bell and Crown, to use them are two very different things,” said Michael Brown, president of StrategyMark, in an interview with ICIS.
“The production speed of cans is incredibly high and tiny differences in coating applications can have very big consequences. The willingness to change technologies is very low,” he added.
While BPA in polycarbonate (PC) baby bottles has long been the target of environmental advocates and regulatory scrutiny, BPA-containing epoxy resins in linings of canned food products are increasingly being targeted as well.
“The impact on epoxy can-coatings has been much less pronounced due to a lack of a direct link to the infant/toddler market,” Brown said.
Alternatives for epoxy in can coatings include polyester, polyacrylate, alkyd resins and polyvinyl chloride (PVC) organosols, according to StrategyMark.
“Alternatives are rather limited, and none of these resins are exact drop-ins for epoxy,” Brown said.
“Each would require a substantial trade-off in cost and processability for the can maker,” he added.
Certain alternatives may even have their own health effect issues, he noted.
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