	US 11,891,469 B2
	Urethane acrylate composition
Liang Chen, Sewickley, PA (US)
Assigned to STRATASYS, INC., Eden Prairie, MN (US)
Filed by STRATASYS, INC., Eden Prairie, MN (US)
Filed on Jun. 28, 2021, as Appl. No. 17/359,939.
Prior Publication US 2022/0411560 A1, Dec. 29, 2022
Int. Cl. C08F 2/46 (2006.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01); C08F 283/00 (2006.01); B33Y 70/00 (2020.01); B33Y 10/00 (2015.01); B29C 64/124 (2017.01); B29K 75/00 (2006.01)

CPC C08F 283/006 (2013.01) [B33Y 70/00 (2014.12); B29C 64/124 (2017.08); B29K 2075/00 (2013.01); B33Y 10/00 (2014.12)]

11 Claims

1. A photopolymerizable composition comprising a blend of:

a) from 40 wt. % to 70 wt. % of at least one urethane component;

b) from 25 wt. % to 70 wt % of at least one monofunctional reactive diluent;

c) from 0.1 wt. % to 5 wt. % of at least one initiator; and

d) from 2 wt. % to 10 wt % of at least one amine-functional (meth)acrylate monomer,

e) optionally, at least one multiple-functional reactive diluent,

f) optionally, from 0.001 wt. % to 1 wt. % of an inhibitor,

wherein the wt. % in all instances is based on total weight of the photopolymerizable composition, and wherein the amine-functional (meth)acrylate monomer is selected from the group consisting of diethylaminoethyl methacrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, 2-(diisopropylamino)ethyl methacrylate, and N-[3-(dimethylamino)propyl]methacrylamide.