An oligomer bearing at least one crosslinkable ethylenic unsaturation and at least one ionic bond comprises in its structure at least one aminoacrylate group and at least one tertiary amine in a form salified with at least one carboxylic acid. Also described are a process for preparing a solution of the oligomer in a reactive diluent, a crosslinkable composition comprising the oligomer, the use thereof as binder in crosslinkable compositions for temporary-use water-removable materials in coatings, hydrogels and 3D object printing, and the crosslinked material which results from polymerizing the oligomer. As a temporary-use material, the cured oligomer can be easily removed after a temporary function, by simple cleaning with water and optionally at a suitable temperature greater than the glass transition temperature of the crosslinked product.

An oligomer bearing at least one crosslinkable ethylenic unsaturation and at least one ionic bond comprises in its structure at least one aminoacrylate group and at least one tertiary amine in a form salified with at least one carboxylic acid. Also described are a process for preparing a solution of the oligomer in a reactive diluent, a crosslinkable composition comprising the oligomer, the use thereof as binder in crosslinkable compositions for temporary-use water-removable materials in coatings, hydrogels and 3D object printing, and the crosslinked material which results from polymerizing the oligomer. As a temporary-use material, the cured oligomer can be easily removed after a temporary function, by simple cleaning with water and optionally at a suitable temperature greater than the glass transition temperature of the crosslinked product.

The present invention relates to an esteramine salt according to the general formula (I):

##STR00001##

The substituents R.sup.1, R.sup.2 and R.sup.3 are defined below.

The present invention further relates to a process for preparing such an esteramine salt according to general formula (I), wherein a corresponding monocarboxylic acid or an ester thereof are reacted with an aminoalcohol and an at least equimolar amount of a sulfonic acid.

The present invention relates to an esteramine salt according to the general formula (I):

##STR00001##

The substituents R.sup.1, R.sup.2 and R.sup.3 are defined below.

The present invention further relates to a process for preparing such an esteramine salt according to general formula (I), wherein a corresponding monocarboxylic acid or an ester thereof are reacted with an aminoalcohol and an at least equimolar amount of a sulfonic acid.

Compounds are provided having the following structure:

##STR00001##

or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R.sup.1a, R.sup.1b, R.sup.2a, R.sup.2b, R.sup.3a, R.sup.3b, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, L.sup.1, L.sup.2, a, b, c, d and e are as defined herein. Use of the compounds as a component of lipid nanoparticle formulations for delivery of a therapeutic agent, compositions comprising the compounds and methods for their use and preparation are also provided.

Compounds are provided having the following structure:

##STR00001##

or a pharmaceutically acceptable salt, tautomer or stereoisomer thereof, wherein R.sup.1a, R.sup.1b, R.sup.2a, R.sup.2b, R.sup.3a, R.sup.3b, R.sup.4a, R.sup.4b, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, L.sup.1, L.sup.2, a, b, c, d and e are as defined herein. Use of the compounds as a component of lipid nanoparticle formulations for delivery of a therapeutic agent, compositions comprising the compounds and methods for their use and preparation are also provided.

Process for the production of 2-dimethylaminoethyl (meth)acrylate in multiple stage batch reactions involving the recycling of the catalyst (DBTO) in subsequent reaction, the addition a certain amount of fresh catalyst to the recycled catalyst, the use of said catalysts in the subsequent reaction, and wherein the volume decrease due to azeotropic distillation is compensate in order to keep the volume constant in the reactor during the reaction by the continuous addition of a composition comprising methyl(meth)acrylate and dimethylaminoethanol.

Process for the production of 2-dimethylaminoethyl (meth)acrylate in multiple stage batch reactions involving the recycling of the catalyst (DBTO) in subsequent reaction, the addition a certain amount of fresh catalyst to the recycled catalyst, the use of said catalysts in the subsequent reaction, and wherein the volume decrease due to azeotropic distillation is compensate in order to keep the volume constant in the reactor during the reaction by the continuous addition of a composition comprising methyl(meth)acrylate and dimethylaminoethanol.

Process for the production of 2-dimethylaminoethyl (meth)acrylate in multiple stage batch reactions involving the recycling of the catalyst (DBTO) in subsequent reaction, the addition a certain amount of fresh catalyst to the recycled catalyst, the use of said catalysts in the subsequent reaction, and wherein the volume decrease due to azeotropic distillation is compensate in order to keep the volume constant in the reactor during the reaction by the continuous addition of a composition comprising methyl(meth)acrylate and dimethylaminoethanol.

The invention provides an associative polymer, a powder, and a process for making a powder including, networking one or more associative polymers and one or more optional surfactants to form a wet gel, and forming a powder from the wet gel, wherein the associative polymer(s) have a weight average molecular weight of from about 10 kDa to about 2,000 kDa.