3,4-Epoxycyclohexylmethyl-3,4-
epoxycyclohexane carboxylate
September 30, 2016 14:39
Patent Title: PHOTOCURABLE COMPOSITIONS FOR THREE-DIMENSIONAL PRINTING
Number/Link: WO 2016/153711
Applicant/Assignee: Dow
Publication date: 29-09-2016
“Gist”: Acrylate-capped PU prepolymer is copolymerized with epoxides using UV radiation
Why it is interesting: This case is about UV-curable compositions to make flexible materials using additive manufacturing, especially stereolithography. A prepolymer of an isocyanate and a ‘flexible’ polyol is capped with a hydroxy-functional acrylate, then mixed with a multifunctional epoxy, a multifunctional acrylate ‘monomer’ (a crosslinker also acting as reactive diluent) and two photoinitiators: one radical and one cationic. In the example a 6 to 8000 Mole weight diol is capped with TDI and then with hydroxyethyl acrylate. The prepolymer is then mixed with 3,4-Epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate, 1,6-hexanedioldiacrylate and two photoinitiators. After UV curing the materials had a shore A hardness between about 60 and 80 and an elongation at break between about 70 and 200.
3,4-Epoxycyclohexylmethyl-3,4-
epoxycyclohexane carboxylate
Posted by Gerhard Bleys
Categories: Elastomers, Isocyanates and Prepolymers
Tags: 3d printing, actinic radiation, additive manufacturing, cationic polymerization, Environment, hybrid, Interpenetrating Polymer Network, IPN, laser curing, living polymerization, prepolymer, radical polymerization, UV curing
Mobile Site | Full Site
Get a free blog at WordPress.com Theme: WordPress Mobile Edition by Alex King.