The present invention relates to a process for preparing liquid compositions of etherified melamine formaldehyde resins, namely melamine formaldehyde resins etherified with a primary C.sub.1-C.sub.6-alkanol, which have low formaldehyde contents. The invention also relates to such liquid compositions of etherified melamine formaldehyde resins having a content of free formaldehyde of less than 0.3% by weight. The liquid compositions of etherified melamine formaldehyde resins are useful as crosslinking agents in coating compositions.

The present invention relates to a process for preparing liquid compositions of etherified melamine formaldehyde resins, namely melamine formaldehyde resins etherified with a primary C.sub.1-C.sub.6-alkanol, which have low formaldehyde contents. The invention also relates to such liquid compositions of etherified melamine formaldehyde resins having a content of free formaldehyde of less than 0.3% by weight. The liquid compositions of etherified melamine formaldehyde resins are useful as crosslinking agents in coating compositions.

Method for manufacturing optically transparent gel-polymer electrolytes includes reaction of copolymerization of melamine and formaldehyde or melamine and glyoxal with one or several polyols and/or with one or several monosaccharides, oligosaccharides or polysaccharides and adding of a concentrated acid to form an optically transparent gel-polymer. The electrolyte according to the invention can be used in electrochromic devices and other optical-electrochemical devices as well as in devices for storing electrical energy (such as batteries, supercapacitors and hybrid power storage devices), thus replacing conventional water-based electrolytes.

Method for manufacturing optically transparent gel-polymer electrolytes includes reaction of copolymerization of melamine and formaldehyde or melamine and glyoxal with one or several polyols and/or with one or several monosaccharides, oligosaccharides or polysaccharides and adding of a concentrated acid to form an optically transparent gel-polymer. The electrolyte according to the invention can be used in electrochromic devices and other optical-electrochemical devices as well as in devices for storing electrical energy (such as batteries, supercapacitors and hybrid power storage devices), thus replacing conventional water-based electrolytes.

A method to make heteroatom doped polymer nanosphere/carbon nanospheres uses aromatic amine and aldehyde as raw materials, and in the presence of a compound represented by formula I, reacts the aldehyde with the compound represented by formula Ito form a Schiff base, and then reacts the aromatic amine with the resulting Schiff base, wherein the reaction is conducted in an aqueous solution system at a mild reaction temperature (10° C. to 50° C.) under stirring. The resulting polymer nanospheres are subject to centrifugation and drying, followed by roasting in an inert atmosphere to obtain carbon nanospheres. The nanospheres product prepared using the method has controllable dimensions and morphology, an even particle size, and homogeneously doped heteroatoms.

A method to make heteroatom doped polymer nanosphere/carbon nanospheres uses aromatic amine and aldehyde as raw materials, and in the presence of a compound represented by formula I, reacts the aldehyde with the compound represented by formula Ito form a Schiff base, and then reacts the aromatic amine with the resulting Schiff base, wherein the reaction is conducted in an aqueous solution system at a mild reaction temperature (10° C. to 50° C.) under stirring. The resulting polymer nanospheres are subject to centrifugation and drying, followed by roasting in an inert atmosphere to obtain carbon nanospheres. The nanospheres product prepared using the method has controllable dimensions and morphology, an even particle size, and homogeneously doped heteroatoms.

The present invention relates to a process for preparing liquid compositions of etherified melamine formaldehyde resins, namely melamine formaldehyde resins etherified with a primary C.sub.1-C.sub.6-alkanol, which have low formaldehyde contents. The invention also relates to such liquid compositions of etherified melamine formaldehyde resins having a content of free formaldehyde of less than 0.3% by weight. The liquid compositions of etherified melamine formaldehyde resins are useful as crosslinking agents in coating compositions.

The present invention relates to a process for preparing liquid compositions of etherified melamine formaldehyde resins, namely melamine formaldehyde resins etherified with a primary C.sub.1-C.sub.6-alkanol, which have low formaldehyde contents. The invention also relates to such liquid compositions of etherified melamine formaldehyde resins having a content of free formaldehyde of less than 0.3% by weight. The liquid compositions of etherified melamine formaldehyde resins are useful as crosslinking agents in coating compositions.

A method to make heteroatom doped polymer nanosphere/carbon nanospheres uses aromatic amine and aldehyde as raw materials, and in the presence of a compound represented by formula I, reacts the aldehyde with the compound represented by formula Ito form a Schiff base, and then reacts the aromatic amine with the resulting Schiff base, wherein the reaction is conducted in an aqueous solution system at a mild reaction temperature (10 C. to 50 C.) under stirring. The resulting polymer nanospheres are subject to centrifugation and drying, followed by calcination in an inert atmosphere to obtain carbon nanospheres. The nanospheres product prepared using the method has controllable dimensions and morphology, an even particle size, and homogeneously doped heteroatoms.

A method to make heteroatom doped polymer nanosphere/carbon nanospheres uses aromatic amine and aldehyde as raw materials, and in the presence of a compound represented by formula I, reacts the aldehyde with the compound represented by formula Ito form a Schiff base, and then reacts the aromatic amine with the resulting Schiff base, wherein the reaction is conducted in an aqueous solution system at a mild reaction temperature (10 C. to 50 C.) under stirring. The resulting polymer nanospheres are subject to centrifugation and drying, followed by calcination in an inert atmosphere to obtain carbon nanospheres. The nanospheres product prepared using the method has controllable dimensions and morphology, an even particle size, and homogeneously doped heteroatoms.