photopolymerizable compositions including a urethane component and a reactive diluent, articles and methods

摘要

the present disclosure provides a photopolymerizable composition comprising 50 to 90% by weight of at least one urethane component, 5 to 50% by weight of at least one reactive diluent, 0.1 to 5% by weight of a photoinitiator, and optionally an inhibitor, said composition having a viscosity at a temperature of 40 degrees celsius of 10 pa · s or less, as determined using a magnetic bearing rheometer using a system for measuring the cone type and 40 mm plate, at a shear rate of 0.1 1 / s. the present disclosure also provides an article that includes the reaction product of the photopolymerizable composition, the article having an elongation at break of 25% or greater. in addition, the present disclosure provides a method of producing an article, which includes: (i) providing a photopolymerizable composition and (ii) selectively curing the photopolymerizable composition to form an article. the method also optionally includes (iii) curing the unpolymerized urethane component and / or the reactive diluent remaining after step (ii). in addition, methods are provided that include receiving, by a manufacturing device that has one or more processors, a digital object that comprises data that specifies an article; and generating, with the manufacturing device by an additive manufacturing process, the article based on the digital object. a system is also provided, which includes a screen that presents a 3d model of an article; and one or more processors that, in response to the 3d model selected by a user, cause a 3d printer to create a physical object from an article.