USE OF FREE RADICALLY CURABLE COMPOSITIONS IN ADDITIVE MANUFACTURING METHODS

摘要

The present invention relates to the use of free-radically curable compositions, comprising chain-like and/or cyclic and/or cage-type polysiloxanes substituted by free-radically polymerizable groups and having at least 3 silicon atoms and/or mixed forms thereof, disiloxanes substituted by free-radically polymerizable groups, optionally one, two, three or more free-radically curable monomers having no silicon atom, fillers, initiators and/or catalysts for free-radical polymerization, and also further customary additives, in additive manufacturing methods, preferably in stereolithography (SL) and digital light processing (DLP). The present invention further relates to the use of the cured free-radically curable compositions, preferably for production of dental products.

主权项

1. A process for producing a product, the process comprising curing a free radically curable composition comprising
a.) chain-like polysiloxanes, cyclic polysiloxanes, cage type polysiloxanes, mixed forms thereof, or combinations thereof, wherein the polysiloxanes are substituted by free radically polymerizable groups and have at least 3 silicon atoms, b.) disiloxanes substituted by free radically polymerizable groups and having the following structure: R1aR2(3-a)Si—O—SiR2(3-b)R1b wherein R2 is selected from the group consisting of alkyl, alkenyl, aryl, alkylaryl, and arylalkyl, wherein different R2 may be the same or different, R1 is YZ, Z is a free radically polymerizable group selected from the structural elements —O—(C═O)—CH═CH2, —O—(C═O)—C(CH3)═CH2,—(C═O)—CH═CH2,—(C═O)—C(CH3)═CH2, —CH═CH2, —C(CH3)═CH2, —NH—(C═O)—CH═CH2 and —NH—(C═O)—C(CH3)═CH2, wherein different Z may be the same or different, a is 1 or 2, b is 1 or 2, Y is a connecting element which links the silicon atom to the free radically polymerizable group and consists of an alkylene group, wherein the alkylene group is an unsubstituted, linear, straight chain or branched hydrocarbyl chain or wherein the alkylene group is an unsubstituted hydrocarbyl group interrupted by a urethane group, urea group, ester group, thiourethane group or amide group or wherein the alkylene group is a hydrocarbyl group substituted by a hydroxyl group or this hydroxyl group has been esterified or etherified or wherein the alkylene group is a hydrocarbyl group interrupted by an oxygen atom, a nitrogen atom, a sulfur atom, ester groups, thioester groups, or combinations thereof and is substituted by a hydroxyl group or this hydroxyl group has been esterified or etherified, and wherein different Y may be the same or different, and wherein Y contains 20 or fewer carbon atoms, and wherein YZ is chosen such that Z always has a maximum number of atoms, c.) optionally one, two, three or more free radically curable monomers having no silicon atom, d.) 85 percent by weight or less of one or more fillers based on the total weight of the free radically curable dental composition, e.) initiators, catalysts, or combinations thereof for the free radical polymerization, and f.) further customary additives; wherein the product is produced using an additive manufacturing method.