COMPOSITION OF MICROCAPSULATED BINDER (VARIANTS), METHOD FOR PREPARATION THEREOF, AND SUBSTRATE Russian patent published in 2007 - IPC C08J9/32 B01J13/02 B32B15/02 C08F120/02 C09J151/00 

FIELD: polymer materials.

SUBSTANCE: invention relates to cross-linkable polymeric binders, in particular to microcapsulated binders and produce containing such microcapsulated binder, and discloses composition of microcapsulated binder characterized by that binder forms in situ in capsules and comprises: essentially water-insoluble binder-forming material of core, which core includes at least first addition-type prepolymer, vitrification temperature of homopolymer Tg being less than about 0°C, inflammation temperature at least 75°C, and boiling temperature at least 175°C (at atmospheric pressure); solvent for binder-forming material of core, said solvent being essentially water-soluble and not reacting with prepolymer material; essentially water-insoluble free-radical-initiating substance in amount high enough for efficient catalysis, said substance being, in particular, azo-type initiating substance with half-life period at least 1 h at 25°C, which is soluble in prepolymer material to be polymerized and in solvent. Microcapsules are prepared by composing aqueous mixture comprising colloidal dispersion of microcapsule wall-forming material. In order to obtain core material particles less than about 250 μm in size, aqueous solution is subjected to vigorous stirring. Stirring at a first temperature leads to formation of microcapsule wall from microcapsule wall-forming material, while heating to a second temperature provides polymerization of prepolymer material of the core to form binder in microcapsule. Formation of the binder in microcapsule as well as microcapsuled binder composition and substrate are also described.

EFFECT: simplified binding of microcapsuled material.

56 cl, 2 tbl, 18 ex