Carbon Patents “Epoxy Dual Cure Resin” Process

3D printing resin from Carbon

3D printing resin from Carbon

It seems that Carbon has been awarded a new patent this week. 

The patent, number 2017044381, is entitled, “Epoxy Dual Cure Resins for Additive Manufacturing” and seems to deal with a new method of curing resins for 3D printing. 

I must confess I am not quite sure what this patent describes, as it is written in a highly legal fashion. Here’s the abstract and you can see what I mean: 

An epoxy dual cure resin useful for additive manufacturing of three-dimensional objects includes:(i) a photoinitiator; (ii) monomers and/or prepolymers that are polymerizable by exposure to actinic radiation or light; (iii) optionally, a light absorbing pigment or dye; (iv) an epoxy resin; (v) optionally, but in some embodiments preferably, an organic hardener co-polymerizable with the epoxy resin; (vi) optionally but preferably a dual reactive compound having substituted thereon a first reactive group reactive with said monomers and/or prepolymers that are polymerizable by exposure to actinic radiation or light, and a second reactive group reactive with said epoxy resin (e.g., an epoxy acrylate); (vii) optionally a diluent; (viii) optionally a filler; and (ix) optionally, a co-monomer and/or a co-prepolymer. Methods of using the same in additive manufacturing are also described.

So, that’s entirely clear, right? 

I think what this is saying is that the resin itself contains epoxy elements, where two different substances transform into a third when mixed. On the other hand, maybe not. It’s hard to tell. 

Patents are more frequently being written with a lot of “optionals” that attempt to block future variations of the process from being patented by others. In earlier patents it was a bit simpler: the language was just vague and offered multiple interpretations. 

Note that this is a WIPO patent, meaning it has wide applicability across the world, and signals of Carbon’s longer-term intentions of selling their equipment worldwide. 

Via WIPO

General Fabb

Kerry Stevenson, aka "General Fabb" has been writing Fabbaloo posts since he launched the venture in 2007, with an intention to promote and grow the incredible technology of 3D printing across the world. So far, it seems to be working!

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