Microtek Laboratories, Inc.

David R Virgallito

Ronald Lee Hart

Dale Ellis Work

Carl M Lentz

Danny Allen Davis

Jerry K Lawson

Jerry Lawson

A microcapsule or microcapsule having a polymer wall comprising a melamine formaldehyde reacted with a crosslinking agent to form a unit cell according to a general formula (II) and/or the polymer wall has a FT-IR Spectrum as shown in FIG.The crosslinking agent is a mixture of a reaction product of a cyclic urea (U) and a multifunctional aldehyde (A), and at least one crosslinker selected from the following group: a reaction products of (i) an aminotriazine and at least one aldehyde selected from the group consisting of aliphatic monoaldehydes and multifunctional aliphatic aldehydes, (ii) urea and/or cyclic ureas and formaldehyde, or (iii) phenols and aliphatic monoaldehydes, or from alkoxycarbonylaminotriazines, or multifunctional isocyanates, epoxides, aziridines, and carbodiimides.

Microcapsules and macrocapsules having low remnant free formaldehyde microcapsules and methods of making same

Methods for producing microcapsules begin by preparing an emulsion of a surfactant, core material, and water, followed by the addition of a crosslinking agent and a melamine formaldehyde prepolymer, which is subsequently polymerized. The crosslinking agent is added before the melamine formaldehyde prepolymer, with a first addition or a second addition of a melamine formaldehyde prepolymer, or is divided for addition with both a first addition and a second addition of melamine formaldehyde prepolymer. The crosslinking agent is a mixture of a reaction product of a cyclic urea (U) and a multifunctional aldehyde (A), and at least one crosslinker selected from the following group: a reaction products of (i) an aminotriazine and at least one aldehyde selected from the group consisting of aliphatic monoaldehydes and multifunctional aliphatic aldehydes, (ii) urea and/or cyclic ureas and formaldehyde, or (iii) phenols and aliphatic monoaldehydes, or from alkoxycarbonylaminotriazines, or multifunctional isocyanates, epoxides, aziridines, and carbodiimides.

Methods for making low remnant free formaldehyde microcapsules and microcapsules made by same

The present invention relates to microencapsulated compositions of isothiazolone derivatives and other water insoluble biocides or antifouling agents. In particular, the present invention relates to microencapsulated 4,5 dichloro 2 n-octyl-3(2H)-isothiazolone (DCOIT), useful in marine antifouling coatings and paints.

Microencapsulation of biocides and antifouling agents

The present invention relates to microencapsulated compositions of isothiazolone derivatives and other water insoluble biocides or antifouling agents. In particular, the present invention relates to microencapsulated 4,5 dichloro 2 n-octyl-3(2H)-isothiazolone(DCOIT), useful in marine antifouling coatings and paints.

The present invention is directed to a method for producing macrocapsules containing therein a plurality of microcapsules. In accordance with some embodiments of the present invention, the microcapsules contain a phase change material.

Macrocapsules containing microencapsulated phase change materials

The present invention is directed to thermal energy storage compositions comprising macrocapsules containing therein a plurality of microcapsules and to methods for producing macrocapsules containing microcapsules. In accordance with some embodiments of the present invention, the microcapsules contain a phase change material.

A method for microencapsulating a water-soluble or water-dispersible or water-sensitive material comprising dispersing the water-soluble or water-dispersible or water-sensitive material in an organic continuous phase and adding a polyfunctional isocyanate, a diol or polyol in the presence of an optional polymerization catalyst to the organic continuous phase is described.

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Beavercreek, OH, United States of America

David R Virgallito