摘要:
A biodegradable crosslinked polymer which is a reaction product of a polymer having aldehyde-reactive functional groups and a polyaldehyde, wherein the polymer having aldehyde-reactive functional groups comprises a biodegradable structure or the polyaldehyde comprises a biodegradable structure.
摘要:
The present invention relates to a copolymer compound prepared by copolymerizing two or more monomers selected from indole and indole derivatives. The copolymer compound can be used as an electrode active material to provide an electrochemical cell with an increased capacity and improved cycle properties.
摘要:
A one-step, in-situ, process for producing a high solids content emulsion or dispersion of partially or totally crosslinked urea formaldehyde (UF), melamine formaldehyde (MF), or melamine urea formaldehyde (MUF) resin droplets or particles, by forming a reaction mixture of (i) aqueous formaldehyde (formalin), (ii) at least one water-soluble protective colloid, (iii) water and (iv) optionally a surfactant, and mixing the reaction mixture in a reaction vessel; optionally adjusting the initial pH of the reaction mixture according to a desired value as needed; adding (i) urea or substituted urea, (ii) melamine or substituted melamine, or (iii) a mixture thereof, to the reaction mixture; and heating the reaction mixture to a temperature at which condensation takes place between the (i) urea or substituted urea, (ii) the melamine or substituted melamine, or (iii) the mixture thereof, and the formaldehyde to form a urea formaldehyde, melamine formaldehyde or melamine urea formaldehyde resin, and holding the reaction mixture at that temperature or a higher temperature, under mixing, for a period of time sufficient to achieve a desired degree of crosslinking in said urea formaldehyde, melamine formaldehyde or melamine urea formaldehyde resin; and cooling the reaction mixture. The droplet or particle size of the resulting resin dispersion can be controlled and adjusted by way of the present technique to the application requirements.
摘要:
A one-step, in-situ, process for producing a high solids content emulsion or dispersion of partially or totally crosslinked urea formaldehyde or melamine formaldehyde resin droplets or particles, by forming a reaction mixture of (i) aqueous formaldehyde (formalin), (ii) at least one water-soluble protective colloid, (iii) water and (iv) optionally a surfactant, and mixing the reaction mixture in a reaction vessel; optionally adjusting the initial pH of the reaction mixture according to a desired value as needed; adding (a) urea, substituted urea, or a mixture thereof, or (b) melamine, substituted melamine, or a mixture thereof, to the reaction mixture; and heating the reaction mixture to a temperature at which condensation takes place between the (a) urea, substituted urea, or the mixture thereof, or (b) melamine substituted melamine, or the mixture thereof, and the formaldehyde to form a urea formaldehyde or melamine formaldehyde resin, and holding the reaction mixture at that temperature or a higher temperature, under mixing, for a period of time sufficient to achieve a desired degree of crosslinking in said urea formaldehyde or melamine formaldehyde resin; and cooling the reaction mixture. The droplet or particle size of the resulting resin dispersion can be controlled and adjusted by way of the present technique to the application requirements.
摘要:
A process for making solid colored particles by preparing a reaction solution in water comprising formaldehyde, urea, a cyclic polyamine functional triazine compound, and acid. A dye can be incorporated into the reaction solution if a color other than white is desired. Particles are formed having an average particle size between 1 and 70 microns without the need to resort to crushing to break up agglomerates. Particles made by this process provide excellent color and are easily washable from a substrate when incorporated into a washable formulation.Additionally, it has been found that the incorporation of colored microcapsules of average size of 1-70 microns where the color is located primarily on or in the shell of the microcapsule also provides excellent washable compositions when incorporated into a washable formulation.
摘要:
As new compositions, retiporous amine resin granules of at least 10% pore volume, the pores having a minimum average diameter of about 0.1 micron. A process of preparing the granules from a dispersion of a hardenable amine syrup and their use in paints, polymer and paper as texturing and matting agents are also disclosed.