BARRIER COATINGS FOR FILMS AND STRUCTURES Russian patent published in 2011 - IPC C09D7/12 C09D5/02 C08J7/04 B32B27/20 

Abstract RU 2435811 C2

FIELD: chemistry.

SUBSTANCE: coated film has a carrier film selected from a group comprising polyethylene terephthalate, glycol ester (PET-G), nylon, biaxially oriented polypropylene, oriented polypropylene, cast polypropylene, polystyrene, polyethylene, polyvinyl chloride, polylactic acid (PLA), polyhydroxy alkanoate (PHA), polyvinyl chloride and paper; and a coating on at least one surface of the carrier film, containing (a) vermiculite; (b) a polymer capable of forming a film, selected from polyhydroxyl polymer and urethane-containing polymer; (c) a vermiculite dispersant in the polymer, wherein said dispersant bears a negative charge; and (d) a cross-linking agent. The invention also relates to a method of stabilising a suspension containing vermiculite from a shearing action, involving merging a mixture containing one or more cross-linking agents, a polymer capable of forming a film, water and a vermiculite dispersant bearing a negative charge.

EFFECT: improved barrier properties.

24 cl, 3 tbl, 12 ex

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RU 2 435 811 C2

Authors

Kravitts Khovard S.

Levitt Fred

Dates

2011-12-10Published

2007-04-30Filed