EXPANDING COVER COMPOSITIONS AND USE THEREOF Russian patent published in 2019 - IPC C09D5/02 C09D201/00 C09J11/08 C09J201/00 C09J5/06 

FIELD: packaging industry.

SUBSTANCE: invention offers shock-resistant and/or heat-insulating coating compositions for protective packages. In particular, the protective packages include envelopes, pads and packs with side folds in which fragile and/or perishable items are contained during transportation or mailing. Described is an coating composition comprising: (a) a water-based polymer prepared by emulsion polymerization; (b) a plurality of expandable microspheres having a temperature T₀ beginning of expansion and temperature T_m maximum expansion; and (c) an optional additive, in which the polymer has a modulus of elasticity of less than 0.3 MPa, and a value of tanδ, which is more than 0.35 at mid point between T_m and T₀ expanding microspheres, i.e. at [T₀+(T_m-T₀)/2]. Method for manufacturing an article and a protective packaging article are also described.

EFFECT: high resistance to impacts, strength and heat-insulating properties of protective packages.

10 cl, 3 tbl