A one-part thermally curable composition comprises at least one polyuretdione, thermally activatable amine curative; optional epoxy resin; optional polythiol having an average sulfhydryl group functionality of at least 2; and optional acid stabilizer. The at least one polyuretdione has an average uretdione ring functionality of at least 1.2, and is a reaction product of components comprising: a uretdione-containing material comprising a reaction product of a diisocyanate reacted with itself; a first hydroxyl-containing compound having a single OH group, wherein the first hydroxyl-containing compound is a primary alcohol or a secondary alcohol; and a second hydroxyl-containing compound having more than one OH group, wherein the second hydroxyl-containing compound is a polyol and the reaction product comprises 0.2 to 0.5, inclusive, of hydroxyl equivalents relative to isocyanate equivalents. Cured compositions and assemblies including them are also disclosed.

The present disclosure provides a polymeric material including a polymerized reaction product of a polymerizable composition including components and has a solids content of 90% or greater. The components include a uretdione-containing material including a reaction product of a diisocyanate reacted with itself; a first hydroxyl-containing compound; an optional second hydroxyl-containing compound having a single OH group, wherein; and an epoxy component. The first hydroxyl-containing compound has more than one OH group and the optional second hydroxyl-containing compound is a primary alcohol or a secondary alcohol. The present disclosure also provides a two-part composition, in which the polymeric material is included in the first part and the second part includes at least one amine. Further, a method of adhering two substrates is provided, including obtaining a two-part composition; combining at least a portion of the first part with at least a portion of the second part to form a mixture; disposing at least a portion of the mixture on a first substrate; and contacting a second substrate with the mixture disposed on the first substrate. The disclosure also provides a polymeric material and a method of making a two-part composition. Advantageously, two-part compositions according to the present disclosure can be used as coatings and adhesive systems with handling and performance similar to existing two-part urethane systems, but with less sensitivity to water.

A curable composition comprises a blocked isocyanate compound (PhI) having a plurality of isocyanate groups each protected by phenols (Ph), and an epoxy compound (E) having a plurality of epoxy groups. The curable composition does not contain an isocyanate scavenger which may react with the isocyanate groups nor an epoxy scavenger which may react with the epoxy groups.

The present disclosure provides a polymeric material including a polymerized reaction product of a polymerizable composition including components, a polythiol having an average sulfhydryl group functionality of 2 or greater, and an acidic stabilizer. The components include a uretdione-containing material including a reaction product of a diisocyanate reacted with itself; a first hydroxyl-containing compound having more than one OH group; and an optional second hydroxyl-containing compound having a single OH group. The second hydroxyl-containing compound is a primary alcohol or a secondary alcohol. The present disclosure also provides a two-part composition, in which a polymeric material is included in the first part and the second part includes at least one accelerator. Further, a method of adhering two substrates is provided, including obtaining a two-part composition; combining at least a portion of the first part with at least a portion of the second part to form a mixture; disposing at least a portion of the mixture on a first substrate; and contacting a second substrate with the mixture disposed on the first substrate. The disclosure also provides a polymeric material and a method of curing a two-part composition. Advantageously, two-part compositions according to the present disclosure can be used as sealants, coatings, and adhesive systems having a two-step cure with handling and performance similar to existing two-part urethane systems, but with less sensitivity to water.

Described herein are processes for producing moldings comprising oxazolidinone groups, where polyisocyanate (a) is mixed with at least one organic compound (b) having two or more epoxide groups, at least one catalyst (c) for the isocyanate/epoxide reaction, and optionally auxiliary and additive materials (d) to form a reaction mixture, which is introduced into or applied to a mold and reacted to give moldings including oxazolidinone groups, where the catalyst (c) for the isocyanate/epoxide reaction includes a compound of the general formula [M(R.sub.1)(R.sub.2)(R.sub.3)(R.sub.4)].sup.+ [X I.sub.n].sup.−, where M is a nitrogen atom or a phosphorus atom, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are an organic radical, X is fluorine, chlorine, bromine or iodine, I is iodine, and n stands for rational numbers from 0.1 to 10.

A catalyst for the synthesis of oxazolidinones, preferable polyoxazolidinones, comprising an N-heterocyclic carbene and a Lewis acid (L). The invention is also related to a process for the production of an oxazolidinone compound, preferably a polyoxazolidinone compound, by reacting an isocyanate compound, preferably a polyisocyanate compound with an epoxide compound, preferably a polyepoxide compound, in the presence of the N-heterocyclic carbene and a Lewis acid catalyst and also to the resulting polyoxazolidinone.

The present invention relates to a reaction mixture including one or more polyfunctional isocyanates such that the average isocyanate functionality of the mixture is greater than 2.1, and a catalyst composition including at least one trimerization catalyst and at least one epoxide group; and curing the reaction mixture to give a cured polymer composition made up of the reaction product of isocyanates with themselves.

A method for the production of polyoxazolidinone compounds, comprising the step of reacting an isocyanate compound (A) with an epoxide compound (B) in the presence of a catalyst (C), wherein the isocyanate compound (A) comprises a isocyanate compound (A.sup.1) wherein the a isocyanate compound (A1) comprising at least two isocyanate groups (I.sup.1≥2), preferred two isocyanate groups (I.sup.1=2), wherein the epoxide compound (B) comprises a epoxide compound (B.sup.1) and an epoxide compound (B.sup.2), wherein the epoxide compound (B.sup.2) is different from the epoxide compound (B.sup.1) wherein the epoxide compound (B.sup.1) comprising at least two terminal epoxide groups (F1≥2), preferred two terminal epoxide groups (F.sup.1=2), linked together by a linking group (L1) and the epoxide compound (B.sup.2) comprising at least two terminal epoxide groups (F.sup.2≥2)), preferred two terminal epoxide groups (F.sup.2=2), linked together by a linking group (L.sup.2), wherein the linking group (L.sup.2) comprises acyclic and covalent bonds to each other free of conjugated multiple bonds within the main chain, wherein the epoxide compound (B.sup.2) is present in the epoxide compounds B.sup.1 and B.sup.2, in an amount of ≥0.01 mol-% to <10 mol-%, preferred 1-9 mol-% more preferred 3-8 mol-% based on the molar ratio the terminal epoxide groups in the epoxide compound (B.sup.1) and of the sum of the terminal epoxide groups in the epoxide compound (B.sup.1) and terminal epoxide groups in the epoxide compound (B.sup.2).

The invention relates to a curable two- or multi-part composition with (a) optionally an at least bifunctional epoxy-containing compound; (b) an at least bifunctional nitrogen-based curing agent suitable for epoxy curing; (c) a radiation-curable hybrid compound having both one or more radiation-curable methacrylate groups and one or more epoxy groups; (d) a radical photoinitiator; (e) optionally an accelerator for epoxy curing, and (f) optionally further additives. In addition, the invention relates to a method for the bonding, casting, molding or coating of substrates using the composition.

A polymer resin composition free of solvent and adapted for in situ curing including: (a) at least one epoxy resin compound; (b) at least one isocyanate compound; and (c) a catalyst system including a combination of at least one primary catalyst and at least one secondary catalyst; wherein the primary catalyst includes (ci) at least one organoantimony catalyst; and wherein the secondary catalyst includes (cii) a nitrogen-containing catalyst; and a process for preparing the above composition.