A method for continuously preparing a formulated polyamide prepolymer, of which the solution viscosity is from 0.25 dL/g to 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20 C., the method including a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in an extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously fed therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extraction of the water formed during said polycondensation step and comprising the addition of at least one additive during said polycondensation step in the extruder.

A process for continuously preparing copolyamides by copolymerizing at least one lactam (A) and monomers (M), comprising the steps of a) mixing at least one lactam (A) with monomers (M) at a temperature of 60 to 150 C. and b) passing the mixture obtained in step a) from the top downward through a vertical polymerization tube at polyamide-forming temperatures to obtain a copolyamide, wherein the monomers (M) comprise at least one C32-C40 dimer acid (B1) and at least one C4-C12 diamine (B2) and optionally at least one C4-C20 diacid (B3).

The invention relates to copolymers that contain structural units of the formula (I), of the formula (II) and optionally of the formula (III) NR.sup.1CHR.sup.3CHR.sup.4 (I), NHCOCHR.sup.7 (II), NHCHR.sup.9CHR.sup.10 (III), or structural units of the formula (IV), of the formula (V) and optionally of the formula (VI) NR.sup.1CHR.sup.3CHR.sup.4CHR.sup.5 (IV), NHCOCHR.sup.7CHR.sup.8 (V), NHCHR.sup.9CHR.sup.10CHR.sup.11 (VI), wherein R.sup.1 is a residue of the formula COR.sup.2, of the formula CONHR.sup.2 or of the formula CH.sub.2CH(OH)R.sup.12, R.sup.3, R.sup.4, R.sup.5, R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 independently of each other represent hydrogen, methyl, ethyl, propyl or butyl, and R.sup.2 and R.sup.12 represent hydrogen or selected organic residues. These copolymers are characterized by good degradability and can be used, for example, for preparing active ingredient formulations.

The invention relates to copolymers that contain structural units of the formula (I), of the formula (II) and optionally of the formula (III) NR.sup.1CHR.sup.3CHR.sup.4 (I), NHCOCHR.sup.7 (II), NHCHR.sup.9CHR.sup.10 (III), or structural units of the formula (IV), of the formula (V) and optionally of the formula (VI) NR.sup.1CHR.sup.3CHR.sup.4CHR.sup.5 (IV), NHCOCHR.sup.7CHR.sup.8 (V), NHCHR.sup.9CHR.sup.10CHR.sup.11 (VI), wherein R.sup.1 is a residue of the formula COR.sup.2, of the formula CONHR.sup.2 or of the formula CH.sub.2CH(OH)R.sup.12, R.sup.3, R.sup.4, R.sup.5, R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 independently of each other represent hydrogen, methyl, ethyl, propyl or butyl, and R.sup.2 and R.sup.12 represent hydrogen or selected organic residues. These copolymers are characterized by good degradability and can be used, for example, for preparing active ingredient formulations.

A chemical vessel utilizing induction heating elements and useful for preparing polyamides, such as nylon. The vessel can utilize an array of induction heating elements located inside a process chamber. Also described are a vessel, a heat exchanger, a process, and an apparatus useful for polyamide preparation.

A chemical vessel utilizing induction heating elements and useful for preparing polyamides, such as nylon. The vessel can utilize an array of induction heating elements located inside a process chamber. Also described are a vessel, a heat exchanger, a process, and an apparatus useful for polyamide preparation.

Provided is a composition for interfacially polymerizing polyamide including an amine compound and a chain-type-structured additive containing one or more amino groups and two or more hydroxyl groups, and a method for manufacturing a water treatment separation membrane, and a water treatment separation membrane using the same.

Provided is a composition for interfacially polymerizing polyamide including an amine compound and a chain-type-structured additive containing one or more amino groups and two or more hydroxyl groups, and a method for manufacturing a water treatment separation membrane, and a water treatment separation membrane using the same.

New poly(anhydride)-based polymers have been synthesized. When these polymers are combined with electrolyte salts, such polymer electrolytes have shown excellent electrochemical oxidation stability in lithium battery cells. Their stability along with their excellent ionic transport properties make them especially suitable as electrolytes in high energy density lithium battery cells.

New poly(anhydride)-based polymers have been synthesized. When these polymers are combined with electrolyte salts, such polymer electrolytes have shown excellent electrochemical oxidation stability in lithium battery cells. Their stability along with their excellent ionic transport properties make them especially suitable as electrolytes in high energy density lithium battery cells.