摘要:
The invention relates a process for producing isocyanates comprising the steps of a) providing an azolide and optionally a solvent, and b) adding an acid at a temperature below about 40 C. The invention also relates to the isocyanate obtainable by such a process.
摘要:
The invention relates to a dental composition comprising a) a compound (A) with the following features: only one backbone unit (U) with 6 to 20 carbon atoms, at least 6 carbon atoms thereof forming an aromatic or an aliphatic cyclic moiety, the remaining carbon atoms either being part of substituents pending from the cyclic moiety or being part of bridging groups to spacer units, wherein one or more of the remaining carbon atoms can be replaced by an oxygen atom, the backbone unit not comprising a bisphenol structure and halogen atoms, one or two unit(s) (S) being connected to the backbone unit (U) via an ether linkage, at least one unit (S) comprising a —CH2-CH2-CH2-CH2-O—CH2-CH(Q)-OG moiety or a —CH2-CH(OG)-CH2-OM moiety or a mixture of these two types of moieties within one unit (S), with G comprising at least one polymerizable moiety and an urethane moiety, the urethane moiety acting as connecting element to unit(s) (S), and M comprising at least one group selected from acroyl, methacroyl, aryl, mixtures and combinations thereof, Q comprising at least one group selected from hydrogen, methyl, phenyl, phenoxymethyl, mixtures and combinations thereof, and with the proviso that onto the backbone unit (U) at least two substituents are attached, each bearing at least one group G, wherein in the case where only one unit (S) is present, the group G not being part of said unit (S) is located in the further substituent pending from unit (U), b) a filler (B) and c) an initiator (C).
摘要:
The invention relates a process for producing isocyanates comprising the steps of a) providing an azolide and optionally a solvent, and b) adding an acid at a temperature below about 40 C. The invention also relates to the isocyanate obtainable by such a process.
摘要:
The invention relates to a composition comprising a prepolymer as component (A), wherein the prepolymer comprises aziridino groups and is characterized by an equivalent weight EW1, a crosslinker as component (B), wherein the crosslinker has a structure being different from the structure of the prepolymer and comprises aziridino groups and is characterized by an equivalent weight EW2, an initiator as component (C) being able to start curing of the composition, optionally filler(s) as component (D) and optionally additive(s) as component (E), wherein equivalent weight is defined as (molecular mass of the molecule)/(number of aziridino groups present in the molecule) and wherein EW1>EW2. The invention also relates to the use of the composition for coating, sealing, moulding, adhering, making impressions, producing a dental material.
摘要:
The present invention relates to a dental composition comprising least one carbosilane compound comprising at least one Si-Aryl bond, at least one silicon atom, no Si-Oxygen bond, at least one aliphatic epoxy moiety, wherein said carbosilane compound has no glycidyl ether moieties; and an initiator, optionally filler and optionally additive components selected from the group of modifiers, stabilizers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavorings.
摘要:
The invention relates to a dental composition comprising a) carbosilane containing component (A) comprising at least 1 Si-Aryl bond, at least 1 silicon atom, at least 2 unsaturated moiety, no Si—Oxygen bond, b) Si—H functional component (B), c) initiator (C), d) optionally filler (D), and e) optionally component (E) selected from modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavorings.
摘要:
The present invention relates to dental compositions comprising a halogenated epoxy functional ether derivative comprising at least one aryl alkyl ether moiety, at least one halogen atom attached to each aryl residue of the aryl alkyl ether moieties, at least two aliphatic epoxy moieties, no glycidyl ether structure, an initiator, optionally filler and optionally additive components selected from the group of modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavourings.
摘要:
Carbosilane-containing polymers (including oligomers) having the following structural features: greater than one repeat unit; at least 4 Si-arylene bonds; at least 1 (meth)acrylate moiety, Si—H moiety, or both; no Si—O bonds; preferably at least 4 silicon atoms; wherein 2 silicon atoms are separated by one arylene group in each repeat unit.
摘要:
The present invention relates to a dental composition comprising least one carbosilane compound comprising at least one Si-Aryl bond, at least one silicon atom, no Si—Oxygen bond, at least one aliphatic epoxy moiety, wherein said carbosilane compound has no glycidyl ether moieties; and an initiator, optionally filler and optionally additive components selected from the group of modifiers, stabilizers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavourings.
摘要:
The invention relates to a dental composition comprising a) carbosilane containing component (A) comprising at least 1 Si-Aryl bond, at least 1 silicon atom, at least 2 Si—H functional moieties, no Si-Oxygen bond, b) unsaturated component (131), and/or epoxy component (132), c) initiator (C), d) optionally filler (D) and e) optionally component (E) selected from modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavorings.