Patent ID: 11945900
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Pharmaceuticals (Chemistry)
Classification: CPC C  A  B  G | IPC A  B  C

Claim 21:
22. A method comprising:
a) obtaining a photopolymerizable composition comprising:
30-65 parts by weight of monofunctional (meth)acrylate monomer(s) per 100 parts of the total polymerizable composition, wherein a cured homopolymer of at least one monofunctional (meth)acrylate monomer has a Tg of 30° C. or greater; and

at least one urethane (meth)acrylate comprising polymerized units of an aliphatic polycarbonate diol, wherein the at least one urethane (meth)acrylate comprises a reaction product of at least one of the following:
i) an aliphatic polycarbonate diol, a diisocyanate, a diol (meth)acrylate, and a hydroxy functional (meth)acrylate;
ii) an aliphatic polycarbonate diol and an isocyanate functional (meth)acrylate;
iii) an aliphatic polycarbonate diol, a diisocyanate, and an isocyanate functional (meth)acrylate; or
iv) an aliphatic polycarbonate diol, a diisocyanate, a diol (meth)acrylate, and an isocyanate functional (meth)acrylate;
b) selectively curing the photopolymerizable composition; and
c) repeating steps a) and b) to form multiple layers and create the orthodontic article.