Method of additive manufacturing using photoregulated radical polymerization
AssigneeDow Global Technologies LLC
InventorsPaul Clark, John W. Kramer, Aleksander J. Pyzik
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Abstract
A method of fabricating a three-dimensional object, the method comprising: combining at least one of a meth(acrylate), a (meth)acrylamide, a (meth)acrylonitrile, a styrene, an acrylonitrile, a vinyl acetate, a vinylcarbazole, a vinylpyridine, a vinyl ether, a vinyl chloride monomers, a polyfunctional monomer, and a polyfunctional prepolymer with an organic photoredox catalyst to provide a reaction mixture; depositing the reaction mixture; polymerizing the monomers by irradiating the reaction mixture with a light source; and repeating the depositing step until the three-dimensional object is formed.
Claims3
A method of fabricating a three-dimensional object, the method comprising:
- (a) combining at least one of a meth(acrylate), a (meth)acrylamide, a (meth)acrylonitrile, a styrene, an acrylonitrile, a vinyl acetate, a vinylcarbazole, a vinylpyridine, a vinyl ether, a vinyl chloride monomers, a polyfunctional monomer, and a polyfunctional prepolymer with phenylphenothiazine and ethyl α-bromophenylacetate to provide a reaction mixture;
- wherein a weight ratio between the phenylphenothiazine and the ethyl α-bromophenylacetate is from 0.10 to 2.20;
- (b) depositing the reaction mixture;
- (c) polymerizing the monomers by irradiating the reaction mixture with a light source, wherein polymerization in the reaction mixture is regulated by controlling the amount of time that the reaction mixture is exposed to light;
- and/or by controlling the intensity of light that reaches the reaction mixture;
- and
- (d) repeating steps (b) and (c) until the three-dimensional object is formed.
Dependencies are inferred from the claim text.