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WORKING WITH EPOXY RESINS (AND THEIR ASSOCIATED HARDENERS)
Rank: New forum user
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Dear HSE colleagues, I am a CMIOSH who work as a HSE professional in a manufacturing site where we work with epoxy resins that are applied over dry glass fiber. After years of using these materials, we have got an operative affected by a skin allergy and my concerns about this have increased. Before starting using these materials, I did the relevant research and worked together with the manufacturers of the products to use their expertise. As a result of this (and together with the relevant information extracted from section 9 of the SDSs), we have been extracting the fumes coming from the curing of the products, using the relevant PPE (namely overalls, gloves (with different breakthrouh times depending on the tasks to be done), eye protection, masks with organic filters...), etc. I was wondering if some of you have experience in this field and could point me in the right direction (resin safety forums, chemical safety forums, advice on fumes coming from the curing of the products...) to get some extra advice to look into and confirm whether or not I´m doing the right thing and, hopefully, get new ideas on how to prevent this occupational hazard or reduce the exposure. Many thanks in advance for your help/advice on the topic. Have a safe day, Alfie
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Rank: Super forum user
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Hello Alfie
First of all I think I would revisit why, if your operative was wearing all the correct PPE to prevent an allergic reaction, that he has now had one. Surely he should not be able to come into contact with the product by the time he has his gloves, overalls, masks, goggles, etc in place.
I would then consider if there may be another reason for this skin complaint which may not be related to the epoxy resins? Has the chemical composition of another product he is using, without the same level of protection, changed? Has his wife changed their washing powder? Is he suddenly eating different foods, developed a mild nut allergy, got hives, strawberry rash, etc. There are so many spontaneous skin reactions he could have that to assume it is the one product that is totally protected against may be a fallacy.
Initially I would send him to occupational health and see if they have a skin test for an allergic reaction to this product just to ascertain that it is this that is causing the issue.
Edited by user 23 November 2016 11:08:58(UTC)
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 1 user thanked hilary for this useful post.
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Rank: Super forum user
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Agree with Hilary that this might not be work-related but would also note that skin reaction might be associated with curing agent such as Methyl Ethyl Ketone Peroxide (MEKP) or the fibres. Gloves that would protect against the resin might not be effective against either MEKP or fibres.
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Rank: Super forum user
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Where is the operatives skin affected - all over or localised ? Is this a new employee or have they recently changed duties ? Are you sanding / abrading the product once cured ?
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Rank: Super forum user
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What is the hardener that you are using, there are many different hardeners but 2 would cause particular concern, these being isocyanate hardeners (MDI or TDI) and organic anhydrides. Both these types of hardener are skin sensitisers and more importantly they are respiratory sensitisers. MDI and TDI have also been re-classified under the Global Harmonisation System as being Cat2 carcinogens (suspected of causing cancer).
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Rank: Super forum user
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I sympathise. This is a difficult material to work with and I worry a lot about the risk of epoxy sensitisation (as well as burns from the hardeners which are often corrosive). Just using the right PPE really isn't enough - you also have to use it in the right way (practising the right method of taking gloves off so as not to spread contamination), and look after your skin (for which wearing gloves for extended periods isn't great either). Occ health support is a must. Are you aware of the trade association for composites? https://compositesuk.co.uk
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Rank: Super forum user
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Probably no help at all, but as someone who is highly allergic to expoy resin this post resinates with me. I have been advised in the past the allergy is not that unusual because it is toxic and man-made. I am allergic to the material itself and also the fumes, even velcro touching my skin brings out a rash because it contains epoxy resin.
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Rank: New forum user
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Dear Hilary, Peter, chris42, pl53, Kate and RayRapp, Thanks a lot for your comments and good advice. I fully agree with Hilary about the possibility of non-work related issues being contributing factors to the development of such an allergy. The operative has already been sent to an occupational professional and been tested for sensitivity to our products and his allergy has been confirmed. Responding to Chris42´s queries, the operative has been with us for quite a few years with similar duties throughout his employment. The skin rash started to be apparent in different parts of the body (or at least when we were first told about it) and its severity gradually increased. Pl53, we use organic anhydrides and isocyanate hardeners (MDI) and are aware of their “nasty nature” and also take care of their respiratory sensitizer nature. Thanks Kate for the advice on the right use of PPE, we have started campaigns to refresh people on the right way to use/discard the PPE. Thanks for sharing the composites website. RayRapp, sorry to hear about you being sensitive to these substances and their associated compounds. I know there are more resin based products that we are aware of that we use in our daily lives and that you only realise about their true nature once you are exposed to them. As previously said, thanks a lot for looking into this post and for responding with such an interesting feedback. Alfie
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Rank: Super forum user
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I brought up the issue of where and were they abrading, because in the past I used to work for a company that used two pack expoxy paints ( top coat with isocyanates). We had an employee with an allergic reaction, but only one. We discovered they were rubbing down paint runs either by mechanical means or by hand and no one had noticed. The problem was at the interface of work wear, ie between goves and overalls, around the neck. Dust gets everywhere. Hence my questions. Chris
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