Orthodontic articles comprising polymerized composition with pendent cyclic moieties, methods, and polymerizable compositions
Polymerizable compositions suitable for use for 3D printed (e.g. orthodontic) articles, especially orthodontic alignment trays, are described. The polymerizable composition comprises a) 30-70 parts by weight of (meth)acrylate monomer(s); and b) urethane (meth)acrylate polymer; wherein the reaction product comprises at least 1 wt. % polymerized units of a multifunctional compound comprising pendent cyclic moieties. The orthodontic article comprises the reaction product of a polymerizable composition as described herein. The urethane (meth)acrylate polymer typically comprises polymerized units of a multifunctional compound comprising pendent cyclic moieties and/or at least one (meth)acrylate monomer comprises polymerized units of a multifunctional compound comprising pendent cyclic moieties. Also described are methods of making an article, non-transitory machine-readable medium comprising data representing a three-dimensional model of an article, and systems.
1. An orthodontic article comprising a reaction product of a polymerizable composition comprising:
a) 30-70 parts by weight of (meth)acrylate monomer(s); and
b) a urethane (meth)acrylate polymer comprising a reaction product of at least: a diol lacking pendent cyclic moieties, a polyisocyanate, and a reactive compound comprising pendent cyclic moieties;
wherein the reaction product comprises at least 1 weight percent polymerized units of a multifunctional compound comprising pendent cyclic moieties.
2. The orthodontic article of claim 1 , wherein the pendent cyclic moieties are derived from an isocyanate reactive compound or a hydroxyl reactive compound comprising pendent cyclic moieties.
3. The orthodontic article of claim 1 , wherein the urethane (meth)acrylate polymer comprises a reaction product of:
i) an isocyanate reactive or a hydroxyl reactive compound comprising a pendent cyclic moiety,
ii) a polyol lacking pendent cyclic moieties,
iii) a diisocyanate lacking pendent cyclic moieties, and
iv) a hydroxy functional (meth)acrylate or an isocyanate functional (meth)acrylate.
4. The orthodontic article of claim 3 , wherein the urethane (meth)acrylate polymer further comprises a reaction product of a diol (meth)acrylate.
5. The orthodontic article of claim 3 , wherein the diol lacking pendent cyclic moieties is at least one of: a polyester diol, a polycarbonate diol, or a polyether diol.
6. The orthodontic article of claim 1 , wherein at least one of the (meth)acrylate monomer(s) comprises at least one pendent cyclic moiety.
7. The orthodontic article of claim 1 , wherein the urethane (meth)acrylate polymer and the (meth)acrylate monomer(s) are present at a weight ratio ranging from 2:1 to 1:2.
8. The orthodontic article of claim 1 , wherein the (meth)acrylate monomer(s) comprise at least one monofunctional (meth)acrylate monomer.
9. The orthodontic article of claim 6 , wherein the (meth)acrylate monomer has a log P value of greater than 1, 1.5, 2, 2.5, or 3.
10. The orthodontic article of claim 6 , wherein the (meth)acrylate monomer has a glass transition temperature of at least 30° C., 40° C., 50° C., 60° C., 70° C., 80° C., or 90° C.
11. The orthodontic article of claim 1 , wherein the urethane (meth)acrylate polymer comprises the formula:
(A) p -Q-OC(═O)NH—R di —NHC(═O)O-Q-(A) p ,
wherein A has the formula —OC(═O)C(R 1 )═CH 2 , wherein R 1 is H or an alkyl of 1 to 4 carbon atoms, p is 1 or 2, Q is a polyvalent organic linking group, and R di is the residue of a diisocyanate.
12. The orthodontic article of claim 1 , wherein the polymerizable composition is polymerized and exhibits;
an elongation at break of 15% or greater and a tensile strength at yield of at least 10 megapascals (MPa) as determined according to ASTM D638-14 after conditioning in phosphate-buffered saline with a pH of 7.4 for 24 hours at 37° C., or
a loss of relaxation modulus of less than 70%, 65%, 60%, 55%, or 50%, as determined according to Dynamic Mechanical Analysis after conditioning in deionized water for 48 hours at 22-25° C.
13. The orthodontic article of claim 1 , wherein the polymerizable composition is polymerized and exhibits a loss of relaxation modulus of less than 70%, 65%, 60%, 55%, or 50%, as determined according to Dynamic Mechanical Analysis after conditioning in deionized water for 48 hours at 22-25° C.
14. The orthodontic article of claim 1 , wherein the polymerizable composition comprises a photoinitiator.
15. The orthodontic article of claim 1 , wherein the orthodontic article is an orthodontic alignment tray.
16. A polymerizable composition comprising:
a) 30-70 parts by weight of (meth)acrylate monomer(s); and
b) a urethane (meth)acrylate polymer comprising a reaction product of at least: a diol lacking pendent cyclic moieties, a polyisocyanate, and a reactive compound comprising pendent cyclic moieties;
wherein a reaction product of the polymerizable composition comprises at least 1 weight percent polymerized units of a multifunctional compound comprising the pendent cyclic moieties.
17. A method of making an article comprising:
a) providing a photopolymerizable composition according to claim 16 ;
b) selectively curing the photopolymerizable composition to form the article; and
c) repeating steps a) and b) to form multiple layers and create the article comprising a three-dimensional structure.
18. A method comprising:
a) receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a plurality of layers of an article; and
b) generating, with the manufacturing device by an additive manufacturing process, the article based on the digital object, the article comprising a reaction product of a photopolymerizable composition according to claim 16 .
19. The orthodontic article of claim 11 , wherein Q comprises a straight or branched chain or cycle-containing aliphatic connecting group.